CN106203412A - Optical imaging device and manufacture method thereof and application - Google Patents

Optical imaging device and manufacture method thereof and application Download PDF

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Publication number
CN106203412A
CN106203412A CN201510284029.1A CN201510284029A CN106203412A CN 106203412 A CN106203412 A CN 106203412A CN 201510284029 A CN201510284029 A CN 201510284029A CN 106203412 A CN106203412 A CN 106203412A
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CN
China
Prior art keywords
optical imaging
imaging device
light
housing
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510284029.1A
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Chinese (zh)
Inventor
张宝忠
王明珠
袁业辉
汪凯伦
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Ningbo Sunny Opotech Co Ltd
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Ningbo Sunny Opotech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Sunny Opotech Co Ltd filed Critical Ningbo Sunny Opotech Co Ltd
Priority to PCT/CN2016/071005 priority Critical patent/WO2016112864A1/en
Publication of CN106203412A publication Critical patent/CN106203412A/en
Pending legal-status Critical Current

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Abstract

A kind of optical imaging device and manufacture method thereof and application, wherein said optical imaging device includes an identification carrier, and it has a transparent identification region, thing side；One darkroom housing, wherein said darkroom housing forms a darkroom, and has a through hole, and described through hole is connected with described darkroom；One image sensing apparatus, it includes that an imageing sensor, described imageing sensor are installed in described darkroom；With a light source, wherein said light source is installed on described darkroom hull outside, wherein when one knows and object is positioned over described identification region, thing side, identification region, thing side described in the transmitting light directive that described light source sends arrives described identification subject surface and is reflected with going forward side by side a step, then pass through described through hole and project described imageing sensor, thus make described identification object carry out imaging by described optical imaging system by pinhole imaging system principle.

Description

Optical imaging device and manufacture method thereof and application
Technical field
The present invention relates to a kind of imaging device, particularly to a kind of optical imagery utilizing pinhole imaging system principle to set up Device and manufacture method thereof and application, for the optical imaging system of prior art, described optical imagery Device is when gathering the image of object, it is not necessary to be configured the optical element such as lens, prism, thus so that institute Reduce with stating the highly significant of optical imaging device, and then so that described optical imaging device can be applied to Pursue the fields such as lightening, the electronic equipment of miniaturization, medical apparatus and instruments.
Background technology
The identity recognizing technology of user is of common occurrence for electronic equipment to be seen.Such as, a kind of comparison is popularized User identity identification mode be on an electronic device input combination numeral or letter as password, and be pre-stored in electricity The password of subset is compared, and i.e. can be identified the identity legitimacy of user；Another kind is more universal User identity identification mode based on biological characteristic realize, typical embodiment be gather user fingerprint Image, and compare with the fingerprint image being pre-stored in electronic equipment, i.e. can complete the identity to user legal Property is identified.
The process of practice proves that the safety of the first identification mode is relatively low, and its reason is, anyone is Can be by correct Password Input to electronic equipment, now, electronic equipment will be considered that the importer of password is for legal User, this control that just directly results in electronic equipment is obtained by this importer.Comparatively speaking, the second The identification carrying out user by the way of gathering the biological characteristic of user has the biggest in terms of safety Promote.
The technology of biological characteristic (such as fingerprint image) gathering user of prior art have the technology of semiconductor chips and Optical image technology, both technology are respectively arranged with pluses and minuses.
Antistatic and the resistance to corrosion of the fingerprint capturer that the technology of semiconductor chips of prior art is made are poor, This causes fingerprint capturer stability during using not enough, especially has antiperspirant when the finger tip of this importer During liquid secretion, fingerprint capturer just cannot collect fingerprint image.One typical example is easily to go out hand perspiration This importer fluency when use fingerprint capturer is poor, has severely impacted the user's body of fingerprint capturer Test.
The principle of the fingerprint capturer that the optical image technology of prior art is made is the full transmitting of light.Fingerprint is adopted The component that storage is necessary includes imageing sensor, prism, lens and light source etc., and prism and lens are arranged at image On the photosensitive path of sensor, and it is provided with image acquisition areas on the top of prism and lens.At fingerprint capturer When being used for the fingerprint image gathering this importer, finger tip is positioned over image acquisition areas by this importer, and light produces Raw light can be irradiated to the finger tip being positioned at image acquisition areas of this importer, and light is reflected by finger tip, because of The existence of fingerprint for the finger tip of this importer so that the light quantity of the diverse location reflection of finger tip is different, thus, The light reflected by the finger tip of this importer, after through prism and lens, is received by imageing sensor, with complete The collection of the fingerprint graph of the finger tip of this importer in pairs.
Although the stability of the optical image technology of prior art and accuracy are better than the technology of semiconductor chips, but Utilize fingerprint capturer that optical image technology makes because the existence of the optical glass such as prism, lens so that refer to Height and the width of stricture of vagina harvester are the biggest, and then cause optical image technology cannot be applied to pursuing frivolous In the electronic equipment changed.
It addition, in terms of medical science, the optical image technology of endoscope's use and the optical image technology of electronic equipment Similar.Specifically, endoscope makes its volume cannot continue to reduce because being provided with the optical glasss such as lens. At present, in the diagnosis and therapeutic process of some diseases, endoscope cannot be employed because of the restriction of size. Therefore, the size how reducing endoscope also becomes the problem needing solution badly.
Summary of the invention
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, use little Borescopic imaging optical system is as imaging device, simple in construction, it is possible to reduce whole fingerprint recognition and endoscope etc. micro- The size of type imaging system, can be positioned in the instrument and equipment of small size.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, determining After the height overall of whole system device, it is possible to by changing the object distance of aperture optical imaging system, image distance and aperture Size ensures that it has preferable resolution, meets the required precision of fingerprint recognition.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, use little Borescopic imaging optical system, as imaging device, is compared as optical system with traditional use lens, the most permissible Reduce volume, it is also possible to reduce cost.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, abandon Traditional uses prism as the way of fingerprint induction region, and the present invention can select the nothing that any transparency is higher Machine or organic material are as fingerprint induction region, and can accomplish the thinnest, and therefore, cost is relatively low, select certainly By, the volume also making whole fingerprint recognition system is less, and weight is lighter.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, through hole can To be engraved in most of penetrance close on the made relatively thin flat board of the organic or inorganic material of zero, manufacture letter Single.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, it utilizes Identification region, thing side is formed the picture of fingerprint after the light source reflecting certain brightness irradiates by pinhole imaging system optical system Project on imageing sensor, then judge for terminal unit.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, it includes Imaging device can be applied to the optical imaging system of any electronic equipment, applied range as module General.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, utilize little The principle of borescopic imaging, resolution is good, practical, does not has the manufacturing process of complexity, and simple to operate.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, Ke Yigen Optionally it is configured according to the equipment applied, must allow it to reasonably, be applied to phase at low cost Answer in equipment.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, by by Step definition and calculating, finally meet the requirement that can determine that of fingerprint recognition system, simple and practical, workable, Define the size of optical imaging system according to practical situation, be able to adopt optical imaging system as fingerprint image Acquisition means is installed in small fingerprint identification equipment.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, relative to For the optical imaging system of prior art, described optical imaging device is when gathering the image of object, it is not necessary to It is configured the optical element such as lens, prism, thus so that the highly significant ground of described optical imaging device reduces, And then so that described optical imaging device can be applied to pursuing electronic equipment lightening, that be miniaturized, doctor Treat the fields such as apparatus.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, Qi Zhong On the premise of ensureing the resolution of described optical imaging device, the volume of described optical imaging device can be further Be reduced, in order to its can be placed in less equipment use.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, Qi Zhongsuo State photo-sensitive cell and be placed into a dark chamber, and described dark chamber is communicated in the external rings in described dark chamber by a light hole Border, thus, the light being reflected by the object only can enter into described dark intracavity with by described sense by described light hole The photosurface of optical element receives, and then is being subsequently generated the image relevant to the object of collected image.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, wherein when After the height of described optical imaging device is determined, can by change described optical imaging device object distance, The aperture of image distance and described light hole adjusts the resolution of described optical imaging device, thus, make described light Learn the requirement that imaging device meets the precision of the identification for user.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, Qi Zhongsuo State optical imaging device and also include that a carrying platform, described carrying platform form an image acquisition region, Qi Zhongsuo State carrying platform not to be made up of the optical element such as prism and lens, but the most inorganic by any penetrance or Organic material is made, thus significantly reduces the whole height of described optical imaging device.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, wherein when After described optical imaging device is configured in described electronic equipment, the part-structure of described electronic equipment can be with shape Become the described image acquisition region of described optical imaging device, thus described optical imaging device meets described electronics Equipment is lightening, the development trend of miniaturization.
It is an object of the present invention to provide a kind of optical imaging device and manufacture method thereof and application, wherein when After described optical imaging device is configured in described electronic equipment, the part-structure of described electronic equipment can be with shape Become the light source of described optical imaging device, say, that the described optical imaging device of the present invention can need not It is configured light source, to reduce the volume of described optical imaging device further.
For other advantages and the purpose of the above advantage and the present invention that meet the present invention, the present invention provides a kind of light Learn imaging system, a kind of optical imaging method and a kind of utilize pinhole imaging system principle to formulate optical imaging system Method.
Correspondingly, the present invention provides a kind of optical imaging system, comprising:
One identification carrier, it has a transparent identification region, thing side；
One darkroom housing, wherein said darkroom housing forms a darkroom, and has a through hole, described through hole and institute State darkroom to be connected；
One image sensing apparatus, it includes that an imageing sensor, described imageing sensor are installed in described darkroom； With
One light source, wherein said light source is installed on described darkroom hull outside, is wherein positioned over object when a knowledge During described identification region, thing side, go forward side by side a step in identification region, thing side described in the transmitting light directive that described light source sends Ground arrives described identification subject surface and is reflected, and then passes through described through hole and projects described imageing sensor, from And make described identification object carry out imaging by described optical imaging system by pinhole imaging system principle.
Preferably, described image sensing apparatus farther includes a circuit board, and wherein said circuit board is connected to institute State imageing sensor.
Preferably, identification region, described thing side uses and has the inorganic of high permeability or organic material making.
Preferably, make described darkroom housing inorganic or organic material stop light by and formed described secretly Room.
Preferably, wherein forming an accommodating chamber in described darkroom hull outside, described light source is installed on described chamber One or more positions of chamber interior.
Preferably, described light source launches ultraviolet, infrared or visible ray individually or simultaneously, and described imageing sensor is fitted Together in sensing ultraviolet, infrared or visible ray.
Preferably, described circuit board is connected to the diapire of described darkroom housing or as the end of described darkroom housing Wall, to form described darkroom.
Preferably, described optical imaging system is assembled in a fingerprint and sets equipment.
Preferably, described optical imaging system is integrated in an intelligent electronic device, and described identification object is fingerprint, Thus provide fingerprint identification function for described intelligent electronic device.
Preferably, described optical imaging system is assembled in an endoscope.
The present invention also provides for a kind of optical imaging method, and it comprises the following steps:
(a) source emissioning light line；
The transmitting light of the b described light source of identification region, thing side reception that () is transparent, and it is placed on described thing Side identifies that the identification object in region is by light line reflection；
C () described reflection light projects an imageing sensor by a through hole, thus former by pinhole imaging system Reason makes described identification object carry out imaging.
Preferably, in described step (c), the light outside through hole described in described light source directive by described secretly Room housing is stopped, thus the light that described light source sends can only arrive described figure by described through hole after being reflected As sensor.
Preferably, described imageing sensor is installed in a darkroom of described darkroom housing, and described light source is installed on Outside described darkroom, identification region, described thing side and described through hole be arranged in parallel, and keep a spacing.
Preferably, the aperture of described through hole, described through hole are to identification region, described thing side and described imageing sensor Distance and the size of described imageing sensor determine according to pinhole imaging system principle.
Preferably, identification region, described thing side uses and has the inorganic of high permeability or organic material making.
Preferably, described light source launches ultraviolet, infrared or visible ray, described imageing sensor energy individually or simultaneously Enough sense ultraviolet, infrared or visible ray.
The present invention also provides for a kind of method utilizing pinhole imaging system principle to formulate optical imaging system, described method bag Include following steps:
(A) height overall of whole optical imaging system is formulated；
(B) the induction area U needed for definition identification region, thing side；
(C) the aperture Φ of a through hole, distance W of described through hole a to sensitive surface and described through hole are defined Distance X and corresponding tolerance to an imageing sensor；
(D) suitable imageing sensor is selected；With
(E) select to meet at least one light source needed for system.
Preferably, farther include a step (F) inspection institute and must identify whether object reaches terminal system and can sentence Provisioning request, if reaching to judge requirement, then completing, if not reaching judgement requirement, then returning step (C) Analyze failure cause, till qualified, after wherein said step (F) is positioned at described step (E).
Preferably, in described step (C), according to formula F=Φ (W/X+1), calculate aperture Φ and Tolerance, wherein F represents the scope being imaged thing corresponding to the point on screen.
Preferably, in described step (C), according to formula F=Φ (W/X+1), calculate aperture Φ and Tolerance, wherein F represents the scope being imaged thing corresponding to the point on screen.
Preferably, by formula V=[UX+ Φ (W+X)]/W, calculate image height V and tolerance thereof, wherein said The size of imageing sensor selects according to image height V.
Preferably, by formula V=[UX+ Φ (W+X)]/W, calculate image height V and tolerance thereof, wherein said The size of imageing sensor selects according to image height V.
Preferably, described sensitive surface is positioned at identification region, described thing side, and wherein said induction area U is described The area identifying object of identification region, thing side sensing.
Preferably, distance W and described through hole according to described through hole to described sensitive surface pass to described image Distance X of sensor formulates described optical imaging system, is located on a through-hole wall by described through hole, wherein said Identification region, thing side is installed on the relative of described through-hole wall with described imageing sensor according to the distance of W with X Both sides.
Preferably, described sensor is installed in a darkroom, and the darkroom housing forming described darkroom obtains so that institute State the light of darkroom housing described in the directive that light source sends stopped by described darkroom housing or absorb.
Preferably, in described step (D), select specification size, pixel value and pixel size and all close Suitable imageing sensor is as the imageing sensor of described optical imaging system.
Preferably, in described step (E), the light source of suitable emission wavelength and light intensity is selected, to meet State brightness and the resolution requirement of optical imaging system.
The present invention also provides for a kind of fingerprint recognition system, to be applied to identify a fingerprint, comprising:
One identification carrier, it has a transparent identification region, thing side；
One darkroom housing, wherein said darkroom housing forms a darkroom, and has a through hole, described through hole and institute State darkroom to be connected；
One image sensing apparatus, it includes that an imageing sensor, described imageing sensor are installed in described darkroom；
One light source, wherein said light source is installed on described darkroom hull outside；With
One fingerprint recognition terminal, it is coupled to described image sensing apparatus, wherein when having finger or toe to be placed in institute When stating identification region, thing side, identification region, thing side described in the transmitting light directive that described light source sends is with going forward side by side a step Arrive described finger or toe surface is reflected, then pass through described through hole and project described imageing sensor, from And make described identification object carry out imaging, described fingerprint by described optical imaging system by pinhole imaging system principle The imaging of described fingerprint is judged and identifies by identification terminal.
Preferably, described darkroom housing uses light-proof material to make.
Preferably, described through hole be arranged in parallel with described imageing sensor.
Preferably, described imageing sensor is connected to a circuit board, and wherein said circuit board is connected to described darkroom The diapire of housing, thus be used for forming described darkroom.
Preferably, described image sensing apparatus and described fingerprint recognition terminal share a circuit board.
Preferably, described fingerprint recognition system is suitable for making independent fingerprint identification device, or is integrated in an intelligence In energy electronic equipment.
The present invention also provides for a kind of optical imaging device, wherein said optical imaging device include a photo-sensitive cell and One light source, described optical imaging device has an image acquisition region, dark chamber and a light hole；
Wherein said light hole is communicated in the external environment condition in described dark chamber and described dark chamber, and described photo-sensitive cell is positioned at Described dark chamber, and described light hole is corresponding to the photosurface of described photo-sensitive cell, described light source be positioned at described secretly The external environment condition in chamber, described image acquisition region is positioned at the photosensitive path of described photo-sensitive cell；
Wherein when a placing object is in described image acquisition region, the light that described light source produces is being radiated to Being reflected by the surface of described object after stating object, the light reflected by the surface of described object is through described light hole Enter described dark chamber and received by the photosurface of described photo-sensitive cell further, thus described optical imaging device is adopted The image of collection object.
Preferably, described light hole is corresponding to the center of the photosurface of described photo-sensitive cell.
Preferably, described optical imaging device also includes that a housing, wherein said housing have described dark chamber and institute Stating light hole, described photo-sensitive cell is housed inside described housing, and described light source is neighboringly arranged at described housing.
Preferably, described optical imaging device also includes a housing and a substrate, and wherein said housing is arranged at institute Stating substrate, to form described dark chamber between described housing and described substrate, described light source is neighboringly arranged at institute State housing.
Preferably, also to include that a wiring board, wherein said photo-sensitive cell are mounted on described for described optical imaging device Wiring board, described wiring board is mounted on described substrate.
Preferably, also to include that a wiring board, wherein said photo-sensitive cell are mounted on described for described optical imaging device Wiring board, described substrate has a receptive cavity, and described wiring board is housed inside described receptive cavity.
Preferably, described optical imaging device also includes a wiring board, wherein said photo-sensitive cell and described circuit Plate is mounted on the not homonymy of described substrate respectively, and described photo-sensitive cell is electrically connected to described wiring board.
Preferably, described housing includes a upper housing part and at least side shell portion, and every described side casing parts is the most deviously Described substrate is extended to from the edge of described upper housing part, thus in described upper housing part, every shell portion, described side and described Described dark chamber is formed between substrate.
Preferably, described optical imaging device also includes a housing and a wiring board, and described housing is arranged at described Wiring board, to form described dark chamber between described housing and described wiring board, described photo-sensitive cell is mounted on institute State wiring board.
Preferably, described housing includes a upper housing part and at least side shell portion, and every described side casing parts is the most deviously Described wiring board is extended to from the edge of described upper housing part, thus in described upper housing part, every shell portion, described side and institute State and between wiring board, form described dark chamber.
Preferably, described optical imaging device also includes a housing, a substrate and a support component, wherein said Support component is arranged at described substrate, and the surrounding of described housing extends respectively to described support component, thus in institute Stating and form described dark chamber between substrate, described support component and described housing, described housing has described light hole To be communicated in the external environment condition in described dark chamber and described dark chamber.
Preferably, also to include that a wiring board, wherein said photo-sensitive cell are mounted on described for described optical imaging device Wiring board, described wiring board is mounted on described substrate.
Preferably, also to include that a wiring board, wherein said photo-sensitive cell are mounted on described for described optical imaging device Wiring board, described substrate has a receptive cavity, and described wiring board is housed inside described receptive cavity.
Preferably, described optical imaging device also includes a wiring board, wherein said photo-sensitive cell and described circuit Plate is mounted on the not homonymy of described substrate respectively, and described photo-sensitive cell is electrically connected to described wiring board.
Preferably, described optical imaging device also includes a housing, a wiring board and a support component, Qi Zhongsuo Stating support component and be arranged at described wiring board, the surrounding of described housing extends respectively to described support component, thus Forming described dark chamber between described support component, described wiring board and described housing, described photo-sensitive cell mounts In described wiring board, described housing has described light hole to be communicated in the external rings in described dark chamber and described dark chamber Border.
Preferably, described optical imaging device also includes that a load-carrying unit, wherein said load-carrying unit compartment of terrain set It is placed in described housing, and the sidepiece of described load-carrying unit forms described image acquisition region.
Preferably, the plane at the photosurface place of described photo-sensitive cell is put down with the plane at described load-carrying unit place OK.
The present invention also provides for a kind of electronic equipment, and it includes an optical imaging device, and wherein said optical imagery fills Put and include a photo-sensitive cell and a light source, described optical imaging device have an image acquisition region, a dark chamber with And a light hole；Wherein said light hole is communicated in described dark chamber and the external environment condition in described dark chamber, described photosensitive Element is positioned at described dark chamber, and described light hole is corresponding to the photosurface of described photo-sensitive cell, described light source position In the external environment condition in described dark chamber, described image acquisition region is positioned at the photosensitive path of described photo-sensitive cell.
Preferably, described optical imaging device is for gathering the biological characteristic of user；Wherein being adopted when user When the position of collection image is placed in described image acquisition region, the light that described light source produces is being radiated to described quilt After gathering the position of image, reflected by the position of described collected image, anti-by the position of described collected image Light after penetrating enters described dark chamber through described light hole and is connect by the photosurface of described photo-sensitive cell further Receive, thus described optical imaging device gathers the biological characteristic of user.
Preferably, the type of described biological characteristic is selected from fingerprint, palmmprint and the type group of foot stricture of vagina composition.
Preferably, described electronic equipment is a physical characteristics collecting device, and described electronic equipment also includes one Attachment means, described optical imaging device is communicatively coupled with described attachment means, and described attachment means is suitable to It is communicatively coupled with an electrical equipment.
Preferably, described electronic equipment is a mobile electronic device, and described electronic equipment also includes an equipment Body, described optical imaging device is communicatively coupled with described apparatus body；Wherein said optical imaging device The described biological characteristic of user gathered is transferred to described apparatus body, be pre-stored in described apparatus body Biological characteristic compare, if the match is successful, the most described apparatus body thinks collected described biological characteristic User identity is legal, if it fails to match, the most described apparatus body thinks the use of collected described biological characteristic Person's identity is illegal.
Preferably, described apparatus body includes that a button, described optical imaging device are arranged at described apparatus body, And described button forms described image acquisition region.
Preferably, described apparatus body includes that a display screen, described optical imaging device are arranged at described equipment Body, and described display screen forms described image acquisition region.
Preferably, the type of described electronic equipment selected from mobile phone, panel computer, notebook computer, electricity paper book and The type group of personal digital assistant composition.
Preferably, described electronic equipment is a gate control system or safety cabinet safety lock；Wherein said electronic equipment Including an apparatus body, described optical imaging device is communicatively coupled with described apparatus body；Wherein said light The described biological characteristic of user learning imaging device collection is transferred to described apparatus body, be pre-stored in institute The biological characteristic stating apparatus body is compared, if the match is successful, the most described apparatus body thinks collected described The user identity of biological characteristic is legal, if it fails to match, the most described apparatus body thinks collected described biology The user identity of feature is illegal.
Preferably, described apparatus body includes a processor and a lock body, and described optical imaging device is communicably Being connected to described processor, described processor is operably connected to described lock body, and described processor is able to Control the state of described lock body.
Preferably, described electronic equipment is a payment terminal, pays for statement.
Preferably, described electronic equipment is an express delivery terminal, signs for for quick despatch.
Preferably, described electronic equipment is an endoscope；Wherein said electronic equipment includes an apparatus body, institute State optical imaging device and be communicatively coupled with described apparatus body, and described optical imaging device is arranged at institute State apparatus body, so that described apparatus body forms described image acquisition region.
The present invention also provides for the method for designing of a kind of optical imaging device, and wherein said method for designing includes walking as follows Rapid:
H (), according to the use environment of described optical imaging device, determines the height of described optical imaging device respectively Degree and imaging thing scope；
I thing that () defines described optical imaging device is high；
J () is high according to height, imaging thing scope and the thing of described optical imaging device, calculate described light and study As the object distance of device, image distance, aperture and image height；And
K () configuration meets the light source needed for described optical imaging device.
Preferably, in described step (j), farther include step:
Step (j.1) is according to the image height of described optical imaging device, needed for configuration meets described optical imaging device A photo-sensitive cell；With
Step (j.2), according to the resolution of described optical imaging device, selects to meet described optical imaging device institute The described photo-sensitive cell with suitable pixel quantity and Pixel Dimensions needed.
Preferably, described method for designing further comprises the steps of:
L () detects whether the image quality of described optical imaging device meets use needs, if meeting, described The design of optical imaging device completes, if being unsatisfactory for, repeats described step (j).
Preferably, in the above-mentioned methods, the imaging thing range parameter of described optical imaging device is set as F, if The aperture parameters of fixed described optical imaging device is Φ, sets the image distance parameter of described optical imaging device as X, Set the object distance parameter of described optical imaging device as W；The imaging thing scope of wherein said optical imaging device Function expression: F=Φ (W/X+1) is met with the relation of aperture, object distance and the image distance of described optical imaging device.
Preferably, in the above-mentioned methods, set the thing high parameter of described optical imaging device as U, set described The image height parameter of optical imaging device is V；The image height of wherein said optical imaging device fills with described optical imagery The relation of thing height, aperture, object distance and the image distance put meets function expression: V=[UX+ Φ (W+X)]/W.
The present invention also provides for the manufacture method of a kind of optical imaging device, and wherein said manufacture method includes walking as follows Rapid:
I one photo-sensitive cell is inserted a dark chamber by (), wherein said dark chamber by a light hole be communicated in described secretly The external environment condition in chamber, and described light hole is corresponding to the photosurface of described photo-sensitive cell；
(ii) image acquisition region is formed in the photosensitive path of described photo-sensitive cell, wherein said image acquisition Region is positioned at the top of described light hole, and described image acquisition region is for placing the object of collected image； And
(iii) arranging a light and come from the external environment condition in described dark chamber, the light that wherein said light source produces is in radiation After described image acquisition region, it is placed on the object reflection of described image acquisition region, reflected light Line enters into described dark chamber through described light hole, receives with the photosurface by described photo-sensitive cell.
Preferably, in described step (i), including step:
Make described light hole corresponding to the center of the photosurface of described photo-sensitive cell.
Preferably, in described step (i), further comprise the steps of:
Described photo-sensitive cell is arranged at a substrate；With
There is provided a housing with light hole, to form described dark chamber between described housing and described substrate.
Preferably, in described step (i), further comprise the steps of:
Described photo-sensitive cell is mounted on a wiring board；With
There is provided a housing with light hole, to form described dark chamber between described housing and described wiring board.
Preferably, in described step (ii), further comprise the steps of:
It is positioned apart from a load-carrying unit and forms described image acquisition areas in described housing, wherein said load-carrying unit Territory.
Preferably, described housing is made up of the penetrance inorganic or organic material close to zero.
Preferably, in the above-mentioned methods, at the inner surface of described housing and/or outer surface or attach one layer Extinction or reflectorized material.
Preferably, the light type of described light source is selected from ultraviolet light, infrared light and the type group of visible ray composition.
Preferably, in the above-mentioned methods, the imaging thing range parameter of described optical imaging device is set as F, if The aperture parameters of fixed described optical imaging device is Φ, sets the image distance parameter of described optical imaging device as X, Set the object distance parameter of described optical imaging device as W；The imaging thing scope of wherein said optical imaging device Function expression: F=Φ (W/X+1) is met with the relation of aperture, object distance and the image distance of described optical imaging device.
Preferably, in the above-mentioned methods, set the thing high parameter of described optical imaging device as U, set described The image height parameter of optical imaging device is V；The image height of wherein said optical imaging device fills with described optical imagery The relation of thing height, aperture, object distance and the image distance put meets function expression: V=[UX+ Φ (W+X)]/W.
The present invention also provides for a kind of formation method by an optical imaging device, and wherein said method includes as follows Step:
(1) light is produced by a light source；
(2) light radiation that described light source produces is to an image acquisition region；
(3) surface of the object that the light that described light source produces is placed in described image acquisition region is reflected, Thus produce by reflection light；
(4) the described light that reflected is through a light hole entrance one dark chamber；And
(5) the described light that reflected is received by a photo-sensitive cell behind the described dark chamber of entrance, thus generates and institute State the image that object is relevant.
Preferably, the light type that described light source produces is selected from ultraviolet light, infrared light and the type of visible ray composition Group.
The present invention also provides for a kind of optical imaging device, and wherein said optical imaging device includes a photo-sensitive cell, Described optical imaging device has an image acquisition region, dark chamber and a light hole；Wherein said photosensitive unit Part is arranged at described dark chamber, and described light hole is communicated in the external environment condition in described dark chamber and described dark chamber, and institute Stating the light hole photosurface corresponding to described photo-sensitive cell, described image acquisition region is positioned at described photo-sensitive cell Photosensitive path；
Wherein set the imaging thing range parameter of described optical imaging device as F, set described optical imaging device The aperture parameters of described light hole be Φ, set the image distance parameter of described optical imaging device as X, set institute The object distance parameter stating optical imaging device is W；The imaging thing scope of wherein said optical imaging device is with described The relation of the aperture of optical imaging device, object distance and image distance meets function expression: F=Φ (W/X+1).
Preferably, set the thing high parameter of described optical imaging device as U, set described optical imaging device Image height parameter is V；The image height of wherein said optical imaging device and the thing height of described optical imaging device, aperture, The relation of object distance and image distance meets function expression: V=[UX+ Φ (W+X)]/W.
Preferably, described optical imaging device also includes that a light source, described light source are positioned at the external rings in described dark chamber Border, wherein when a placing object is in described image acquisition region, the light that described light source produces is being radiated to Being reflected by the surface of described object after stating object, the light reflected by the surface of described object is through described light hole Enter described dark chamber and received by the photosurface of described photo-sensitive cell further, thus described optical imaging device is adopted The image of collection object.
Preferably, described light hole is corresponding to the center of the photosurface of described photo-sensitive cell.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of optical imaging system of a preferred embodiment of the present invention.
Fig. 2 is that a kind of deformation of the structure of a kind of optical imaging system of the above preferred embodiment of the present invention is real Execute.
Fig. 3 is the light of the aperture optical imagery of a kind of optical imaging system of a preferred embodiment of the present invention Line structure schematic diagram.
Fig. 4 is the flow chart of a kind of optical imaging method of a preferred embodiment of the present invention.
Fig. 5 is that a preferred embodiment of the present invention one utilizes pinhole imaging system principle to formulate optical imaging system Method flow diagram.
Fig. 6 is that a kind of optical imaging system of a preferred embodiment of the present invention is applied to fingerprint identification device Formation method flow chart.
Fig. 7 is the imaging that a kind of optical imaging system of a preferred embodiment of the present invention is applied to endoscope Method flow diagram.
Fig. 8 is that cuing open of optical imaging device according to a further advantageous embodiment of the invention shows schematic diagram.
Fig. 9 is that cuing open of the optical imaging device of another preferred embodiment according to the present invention shows schematic diagram.
Figure 10 is that the cuing open of a variant embodiment of the above preferred embodiment according to the present invention shows schematic diagram.
Figure 11 is that cuing open of the optical imaging device of another preferred embodiment according to the present invention shows schematic diagram.
Figure 12 is that the cuing open of a variant embodiment of the above preferred embodiment according to the present invention shows schematic diagram.
Figure 13 is the light channel structure schematic diagram of the optical imaging device according to the present invention.
Figure 14 is the design cycle schematic diagram of the optical imaging device according to the present invention.
Figure 15 to Figure 23 is the schematic diagram of the electronic equipment of different embodiment according to the subject invention respectively, Qi Zhongsuo State electronic equipment and include described optical imaging device.
Figure 24 is according to by the block diagram representation of the formation method of optical imaging device.
Detailed description of the invention
Hereinafter describe and be used for disclosing the present invention so that those skilled in the art are capable of the present invention.In below describing Preferred embodiment be only used as citing, it may occur to persons skilled in the art that other obvious modification.With The ultimate principle of the present invention defined in lower description can apply to other embodiments, deformation program, improvement side Case, equivalent and the other technologies scheme without departing from the spirit and scope of the present invention.
In modern society, a lot of industries and field all use the fingerprint of fingerprint identification device collection people to know Not, in fingerprint collecting comparison process, the reading (or collection of fingerprint image) of fingerprint image is extremely important, This is owing to the definition etc. of fingerprint is required higher, so the accuracy of finger print imaging is very by fingerprint identification device Important.
The optical imaging system that the present invention provides, is directed primarily to the ultra-thin fingerprint utilizing pinhole imaging system principle to set up The micro-optical imaging systems such as identification and endoscope, including an optical system and a sensor-based system, wherein said light System includes an optical imaging system and an illuminator, and according to pinhole imaging system principle, system above is carried out group Obtaining after conjunction being available for the picture that a processing terminal judges, it can be installed on as fingerprint picture collector Miniature instrument equipment is fabricated to fingerprint identification device, provides fingerprint image accurately to fingerprint identification device terminal Picture, for its identification decision；Other medical instruments and equipments such as endoscope can also be installed on as a kind of imaging device Middle for Clinical practice, it is also possible to be installed in other small electronic equipments.
As shown in Figure 1 and Figure 4, a kind of optical imaging system 10, identify including an imaging device 11, and carry Body 12, one light source 13 and an image sensing apparatus 14, wherein said imaging device 11 is positioned at described identification and carries In the chamber 120 that body 12 has, described image sensing apparatus 14 includes an imageing sensor 141, wherein Described imageing sensor 141 is positioned at the inside, darkroom 110 that described imaging device 11 has, and described image Sensor 141 and described through hole 1111 keep a suitable spacing, and described light source 13 is installed on described darkroom 110 Outside.
Further, described darkroom 110 is formed by a darkroom housing 111, wherein said darkroom housing 111 Having a through hole 1111, described darkroom 110 is connected with described chamber 120 by described through hole 1111, institute State identification carrier 12 and there is an identification region, thing side 121, identification region, described thing side 121 and described darkroom shell Body 111 is arranged at intervals, and described light source 13 launches thing side's identification region 121 described in light directive, described Light is reflected in identification region, thing side 121, and according to pinhole imaging system principle, light is linearly propagated, and described thing side identifies The identification object in region 121 is able to project to described imageing sensor 141, then by described through hole 1111 Judge by being connected to a terminal unit of described imageing sensor 141.
Preferably, described darkroom housing 111 may be integrally formed, it is also possible to after being connected by several sidewalls Form described darkroom 110.
It is noted that identification region, described thing side 121 and described imageing sensor 141 are respectively arranged in institute State the relative both sides of aperture 111 and keep a spacing with described aperture 111, and relative with described aperture 111 Should, it constituting pinhole imaging system system, all described light sources 13 constitute described illuminator, it is provided that light source is given Identification region, described thing side 121.
Identification region, described thing side 121 is positioned at two that described through hole 1111 is relative with described imageing sensor 141 Side, all keeps a spacing with described through hole 1111, and wherein said spacing is more than zero, respectively as object distance and picture Away from.
There is spacing, to be formed between sidewall 122 and the described darkroom housing 111 of described identification carrier 12 Stating chamber 120, the most described chamber 120 includes that identification region, described thing side 121, described sidewall 122 are with described All regions between darkroom housing 111.
Described image sensing apparatus 14 farther includes a circuit board 142, and wherein said circuit board 142 is electrically connected It is connected to described sensor 141, it is preferable that described circuit board 142 is connected to the diapire of described darkroom housing 111, It addition, described circuit board 142 can also be as the diapire of described darkroom housing 111.
It is noted that the manufacture material of described darkroom housing 111 is light-proof material, it is possible to stopped Or absorption light, prevents from being positioned at the light entrance that the described light source 13 outside described darkroom housing 111 sends Described darkroom 110.Furthermore, it is possible to select any materials to manufacture described darkroom housing 111, simply using When, outside it, paste one layer of lighttight thin paper or coating one layer is lighttight or can the material of extinction Material so that it is absorbed or stop light.Advantage of this is that so that be positioned in described darkroom 110 Described imageing sensor 141 receives the light by the reflection of identification region 121, described thing side, to ensure to gather The accuracy of image.
Further, sidewall 122 and the diapire 123 of described identification carrier 12 can also pass through corresponding sheet material Sealing, described light source 13 is then installed on described sidewall 122 and/or one of described diapire 123 or many Individual position, it is outside that described light source 13 can also be installed on described darkroom housing 111, to launch light directive institute State identification region, thing side 121.Such as, in the preferred embodiment, described light source 13 is installed on described sidewall 122 and described diapire 123 on.In a word, as long as the light that sends of described light source 13 can be known thing side described in directive Other region 121, directly will not enter described darkroom 110 by described through hole 111 simultaneously.
In other words, the light that described light source 13 is launched can not enter described darkroom 110, though described light source Wall around darkroom 110 described in the 13 light directives launched, the most described darkroom housing 111, it is also desirable to described Darkroom housing 111 is stopped or is absorbed, it is notable that the when of installing described light source 13, it should be noted that Avoid its light to inject described through hole 1111, obtain so that described through hole 1111 can only receive cog region, described thing side The light of territory 121 reflection.
In the present embodiment, described circuit board 142 can select FPC plate (flexible PCB).
Further, when described darkroom housing 111 connects formation by corresponding sheet material, formed described secretly The sidewall of room housing 111 can move freely, and the through-hole wall being regulated described darkroom housing 111 (is and sets Have the wall of described through hole 1111) and described imageing sensor 141 between distance, user can be according to reality Border uses environment and imaging requirements to change the distance between described through hole 1111 and described imageing sensor 141, I.e. be equivalent to change image distance so that image distance can freely regulate, add the application model of described imaging device Enclose.
It is noted that the size in identification region, described thing side 121 comes certainly according to actually used situation Fixed, i.e. determine according to the size identifying object, and it should use transparent material to make.Such as, when by it When being applied in fingerprint identification device, can be determined by the area sensing identification needed for somatic fingerprint, carry out fingerprint During identification, placement finger is to gather fingerprint thereon, it requires the making material in identification region, described thing side 121 Material to have higher transmitance, and transparent all kinds of inorganic or organic material therefore can be selected to make, and it is permissible Accomplish the thinnest, but require that it still has certain intensity when thinner thickness, allow it to bear During fingerprint recognition, finger presses the power applied.
Described darkroom housing 111 can select penetrance close to made by the inorganic or organic material of zero relatively Thin flat board, i.e. light cannot pass from described darkroom housing 111, it is preferable that residing for described through hole 1111 The thickness of inwall of through-hole wall be not to be exceeded described through hole 1111 aperture 1/2nd.
Described light source 13 is the light that can concurrently or separately launch the wave band such as ultraviolet, infrared, visible ray, and it is luminous Characteristic is by the resolution reached needed for system and the type decided of described imageing sensor 141；Described image sensing Device 141 is the sensor that can sense the band of light such as ultraviolet, infrared, visible ray, and its Dimension Types is sensed by fingerprint The size of area and pinhole imaging system system determines.
In other words, described darkroom housing 111 and described image sensing apparatus 14 form an aperture module, institute Stating aperture module and can apply to aperture optical imaging system, wherein said darkroom housing 111 uses impermeable finish Material makes, and is stopped that the light that described light source 13 is launched is emitted directly toward described imageing sensor 141, and then It is prevented the light of identification region 121, described thing side reflection by the local directive beyond described through hole 1111 Described imageing sensor 141, and then make light only enter described imageing sensor 141 by described through hole 1111.
Further, when carrying out appropriately combined by described light source 13 with described aperture module, then one can be formed little Borescopic imaging module, is able to imaging.Specifically, outside described light source 13 is located at described pinhole imaging system module, Making the light directive one thing side that it is launched, in the preferred embodiment, described thing side is that described thing side identifies Region 121, described thing side reflection light, by pinhole imaging system principle, reflection light be then directly entered described secretly Room 110, and then project to described imageing sensor 141, by connecting terminal unit, obtained described thing The picture of side, such as the fingerprint image in this preferred embodiment.
It is noted that described light source 13 may be electrically connected to described circuit board 142, and then by described Circuit board 142 is powered, additionally, when the optical imaging system of present invention offer is applied to the equipment such as electronic product Time middle, described light source 13 can use the light source that equipment carries, it is also possible to described light source 13 is connected to equipment In electric power system.
Fig. 2 is a kind of deformation implementation to the optical imaging system described in Fig. 1, in this variant embodiment, institute State optical imaging system 10A and include an imaging device 11A, an identification carrier 12A, a light source 13A and Image sensing apparatus 14A, wherein said imaging device 11A have a through hole 1111A, arrange described through hole The wall of 111A becomes through-hole wall, wherein said image sensing apparatus 14A include an imageing sensor 141A and One circuit board 142A, is installed in the darkroom 110A that described imaging device 11A has, wherein said secretly Room 110 is formed by a darkroom housing 111A, wherein forms the sidewall 122A of described identification carrier 12A Can be as the two side of described darkroom housing 111A, the most described imaging device 11A and described identification carrier 12A share common sidewalls, the chamber 120A that described imaging device 12A has then is positioned at described imaging device 12A Including a thing side identification region 12A and described through-hole wall between region.
Described light source 13A is installed on the described through-hole wall that described darkroom housing 111A has, so that described Light source 13A launches identification region, thing side 121A, described thing side identification region 121A reflection described in light directive Light, through described through hole 1111A, enters into described darkroom 110A, by described thing side identification region 121A Image projection to described imageing sensor 141A, and then pass to a terminal unit and judge.
Fig. 3 show the light channel structure 20 of the aperture optical imagery of the optical imaging system according to present invention offer Schematic diagram, during use, identification object is positioned over identification region, described thing side 121, wherein said thing side knows Light is reflected in other region 121, and wherein reflection light linearly propagates across described through hole 1111, travels to institute State imageing sensor 141, on general's identification Object Projection to described imageing sensor 141, then enter for instrument terminal Row judges.
Specifically, as it is shown on figure 3, according to above-mentioned optical imaging system, identification region, described thing side 121 as thing side 201, and when carrying out spectral discrimination, identification region 121, described thing side is as sensitive surface, with shape Becoming to identify object, the identification object that will be located in described sensitive surface is made as thing height U, described imageing sensor 141 For image space 205, wherein image height is V, and described through hole 1111 is located on the through-hole wall of described darkroom housing 111, Between described thing side 201 and described image space 205, and the aperture of described aperture is Φ.Described thing side identifies Region 121 is described thing side 201 (or sensitive surface) to described through hole 1111 to the distance of described through-hole wall Distance 202, referred to as object distance W, the distance of described imageing sensor 141 to described through-hole wall is described picture Side 205 is to the distance 204 of described through hole 1111, referred to as image distance X.
In the course of the work, described light source 13 identification region, thing side described in transmitting light 206 directive sent 121, identification region, described thing side 121 is formed with identification object, reflects light, due to described darkroom The opaqueness of housing 111, so the reflection light 207 through the reflection of identification region 121, described thing side can only lead to Crossing described through hole 1111 and just can travel to described imageing sensor 141, other reflection light is then by described logical Described darkroom housing 111 residing for hole 1111 absorbs or stops, say, that described imageing sensor 141 The reflection light 207 through described through hole 1111 reflected by described thing side 201 can only be received, it is impossible to receive There is no the light of through hole 1111 described in directive, i.e. can not receive light that described light source 13 directly launches and penetrate Described reflection light 207 outside described through hole 1111, in other words, except directly by described through hole The described reflection light 207 of 1111 can travel to outside described imageing sensor 141, and other light is the most not Described imageing sensor 141 can be traveled to, the light of imaging device 11 described in the most described light source 203 directive, And the reflection light outside through hole 1111 described in the directive launched by described thing side 201 is all by described darkroom shell Body 111 is absorbed or is blocked.
As it is shown in figure 5, the optical imaging system provided according to the present invention, it can be deduced that fingerprint recognition optical imagery The formation method of system is: launched a branch of transmitting light 206, described transmitting light 206 by described light source 13 Thing side's identification region 121 described in directive, identification region, described thing side 121 carries out reflection and obtains reflecting light 207, Described reflection light 207 travels to described imageing sensor 141 by described through hole 1111, and described image passes Sensor 141 senses that described reflection light 207, the fingerprint image in identification region, described thing side 121 are projected To described imageing sensor 141.The capture that the optical imaging system that the present invention provides is only in fingerprint identification device System, so described imageing sensor 141 is able to send the fingerprint image obtained to fingerprint identification device terminal Judge accordingly.
The present invention utilizes pinhole imaging system principle to set up the optical imaging system such as fingerprint recognition and endoscope, structure letter Single, the optical imagery systems such as whole fingerprint recognition and endoscope can be reduced on the premise of ensureing better solutions image force The size of system, it is simple to be placed in the instrument and equipment that volume is less.
When formulating the optical imaging system that the present invention provides, first formulate the height overall of whole optical imaging system, The height overall of optical imaging system can be formulated, say, that according to by optical imagery according to actually used situation System equipment to be embedded formulates required optical imaging system for the size of optical imaging system Height overall, such as, for different size of fingerprint identification devices such as computer, mobile phone, gate inhibitions for optical imagery system The demand of system is different, can make the optical imaging system of applicable distinct device.
In its application process, optical imaging system is located in mobile phone or gate inhibition, the when of use, by finger Being positioned over identification region, described thing side 121, light, wherein said reflection are reflected in identification region, described thing side 121 Light enters into described darkroom 110, described fingerprint image projects to described imageing sensor 141, for mobile phone Terminal or door control terminal judge.
It is noted that when described optical imaging system is applied in the systems such as mobile phone, can be by mobile phone Back light system is as light source, it is also possible to mobile phone common board, given by other fingerprint identification devices such as mobile phones Described light source and described imageing sensor are powered, meanwhile, as long as by described imaging device 11 according to distance mobile phone Shield certain spacing to install, in other words, need to arrange a transparent region at Mobile phone screen or key position As identification region, described thing side 121, and then at the described through hole 1111 of described imaging device 11 and described thing Side identifies and reserves certain spacing between region, and do not place in this spacing any can stop described The reflection light in identification region, thing side 121 enters the parts of described through hole, in this application, it is only necessary to by described Imageing sensor 141 is positioned in mobile phone, and is arranged around a described darkroom at described imageing sensor 141 110, the described darkroom housing 111 forming described darkroom 110 arranges a described through hole 1111, wherein Described through hole 111 is positioned at described imageing sensor 141 and identification region, described thing side 121, according to mobile phone size Etc. situation arrange the aperture of described through hole 1111, identification region, described thing side 121 and described through hole 1111 it Between distance, described imageing sensor 141 and described through hole 1111 between distance, therefore, this In application, it is no longer necessary to the sidewall 122 of described identification carrier 12 and diapire 123, i.e. can be by its of mobile phone His parts are as the sidewall 122 of described identification carrier 12 and diapire 123.
Additionally, the optical system of the present invention can also be mounted on fingerprint sets equipment, such as, mobile phone, computer, TV and gate inhibition etc., will include imaging device 11, identification carrier 12, light source described in Fig. 1 or Fig. 2 13 and image sensing apparatus apply in fingerprint identification device as an integral installation.
As it is shown in fig. 7, when the optical imaging system that the present invention provides is installed on the medical device such as endoscope, Using image pickup plane as identification region, thing side 121, its image that can recognize is filled by the imaging of the present invention Put 11 and project to described imageing sensor 14, and then must be identified for delivery to endoscope's terminal.By inciting somebody to action When the optical imaging system that the present invention provides is applied in the Medical Instruments such as endoscope, it is ensured that the standard of inspection Really property, can reduce the volume of armarium simultaneously, increases its range of application, the most convenient is put into by camera lens The internal inspection carrying out corresponding site.
Those skilled in the art can according to the present invention provide pinhole imaging system device expect other enforcement and Application, all without departing from the present invention.
Secondly, re-define out the induction area required for fingerprint recognition optical imaging system, i.e. determine described thing High U, the size of wherein said thing height U is determined by the area sensing identification needed for somatic fingerprint, the most described sense The area answering area U to be described fingerprint recognition area image, can come according to the demand of the distinct device embedded Definition.
It is noted that the height overall of described optical system include shown in Fig. 1 from identification region, described thing side The distance of 121 diapires 123 arriving described identification carrier 12 and the thickness of themselves, the most also include Described object distance W shown in Fig. 3 and described image distance X, therefore, it can according to pinhole imaging system principle at described light Suitable described object distance W and described image distance X and corresponding tolerance is defined in the range of learning the height overall of imaging system.
After the height overall of described optical imaging system determines, and define suitable described object distance W and described picture Away from X, on the premise of ensureing that optical imaging system has better solutions image force, can be calculated by F=Φ (W/X+1) Described aperture Φ, and determine the tolerance of described aperture Φ, i.e. draw the size of described through hole 1111, wherein F represents the scope being imaged thing corresponding to the point on screen, determines the resolution of aperture optical imaging system, Before calculating, can carry out calculated hole diameters by resolution F as required, i.e. F is the resolution being actually needed, and makees For datum.
By formula F=Φ (W/X+1) it can be seen that in the case of optical imaging system height overall determines, can adjust Whole object distance W, image distance X and aperture Φ ensure that optical imaging system has preferable resolution, meet equipment pair The demand of resolution.
After height overall, thing height U, object distance W, image distance X and the aperture Φ of whole optical imaging system all determine, By formula V=[UX+ Φ (W+X)]/W, image height V can be calculated, owing to needs are at described imageing sensor Imaging on 141, so, the size of described imageing sensor 141 can select according to image height V, I.e. image height V determines the size of described imageing sensor 141.
After the size determining thing height U, object distance W, image distance X, aperture Φ, image height V and sensor, choosing Select appropriate pixels value and the sensor of pixel size, finally select specification size, pixel value and pixel big Little all suitably sensor is as the described imageing sensor 141 of optical imaging system.
Then the suitable emission wavelength of reselection and the light source 13 of light intensity, be installed on internal system so that light source 13 Meeting needed for system while brightness, the resolution requirement needed for its characteristics of luminescence system to be reached, and accord with The type of the imageing sensor 141 selected by conjunction.
Finally the picture obtained by this optical imaging system is input to judge analysis in fingerprint recognition system terminal, If terminal can analyze this fingerprint of judgement, then this optical imaging system is qualified, if terminal cannot analyze judgement, Then continue through pinhole imaging system principle and redefine object distance W, image distance X and aperture Φ, then reselect biography Sensor and light source, till imaging meets the requirements.
To sum up, as shown in Figure 4, pinhole imaging system principle is utilized to formulate the described optical imaging system that the present invention provides Method comprise the following steps:
(1) start；
(2) height overall of whole optical imaging system is formulated；
(3) induction area needed for definition fingerprint recognition system；
(4) by pinhole imaging system principle define size (or aperture) Φ of aperture, aperture to sensitive surface away from Distance X and corresponding tolerance from W and aperture to sensor；
(5) suitable sensor is selected；
(6) select to meet the light source needed for system；
(7) inspection institute obtains fingerprint imaging and whether reaches fingerprint recognition system and can determine that requirement, if reaching to judge Requirement, then perform (8th) step, if not reaching judgement requirement, then returns (4th) step and analyzes failure cause, Recalculate, perform (8th) step again until qualified；
(8) complete.
It is the optical imaging device provided according to a further advantageous embodiment of the invention as shown in Figure 8, Qi Zhongsuo Stating optical imaging device uses pinhole imaging system principle to gather the image of object.
Specifically, described optical imaging device includes a photo-sensitive cell 30B (imageing sensor), a housing A 40B and load-carrying unit 50B, described housing 40B have the dark chamber 42B of a light hole 41B and, described Light hole 41B is communicated in described dark chamber 42B and the external environment condition of described housing 40B, say, that described The light of the external environment condition of housing 40B only can enter into described dark chamber 42B's by described light hole 41B Internal.Described photo-sensitive cell 30B is housed inside described dark chamber 42B, and described light hole 41B corresponds to The photosurface of described photo-sensitive cell 30B.Preferably, described light hole 41B corresponds to described photo-sensitive cell 30B The center of photosurface.The photosurface of described photo-sensitive cell 30B and the inner surface of described housing 40B do not have There is contact, thus form described optics between the photosurface of described housing 40B and described photo-sensitive cell 30B The image distance of imaging device.
Correspondingly, described load-carrying unit 50B is positioned apart from described housing 40B, so that described load-carrying unit 50B and described housing 40B is not in contact with, thus between described load-carrying unit 50B and described housing 40B Form the object distance of described optical imaging system.The sidepiece of described load-carrying unit 50B forms an image acquisition region 51B, described image acquisition region 51B and described housing 40B are positioned at the not homonymy of described load-carrying unit 50B, And described image acquisition region 51B is positioned on the photosensitive path of described photo-sensitive cell 30B, described using When optical imaging device gathers the image of object, the object of collected image needs to be placed on described image acquisition Region 51B.
The figure of the object of described image acquisition region 51B it is placed in the described optical imaging device collection of use During picture, the light being reflected by the object can sequentially pass through the described of described load-carrying unit 50B and described housing 40B Light hole 41B, and enter in described dark chamber 42B, can be by described photosensitive at the follow-up light being reflected by the object The photosurface of element 30B receives and carries out photoelectric conversion, thus generates relevant to the object of collected image The signal of telecommunication.
It will be understood to those skilled in the art that described dark chamber 42B is a dark cavity, and described Dark chamber 42B is only connected by the external environment condition of described light hole 41B with described housing 40B.It is to say, The light of the external environment condition of described housing 40B only enters in described dark chamber 42B by described light hole 41B, Receive with the photosurface by described photo-sensitive cell 30B, thus so that enter institute by described light hole 41B The light stating dark chamber 42B will not be disturbed, thus, it is ensured that the image quality of described optical imaging device.
Further, described optical imaging device can also include a light source 13B, and described light source 13B is neighboringly It is arranged at described housing 40B, and described light source 13B and described housing 40B is positioned at described load-carrying unit 50B Homonymy.When the image utilizing described optical imaging device to gather object, the light that described light source 13B produces Line can directly be radiated to be placed on the thing of described image acquisition region 51B through described load-carrying unit 50B The surface of body, is then reflected by the surface of object, thus the light being reflected by the object is through described load-carrying unit Enter in described dark chamber 42B after the described light hole 41B of 50B and described housing 40B, and further Received by the photosurface of described photo-sensitive cell 30B.
It is noted that the light that produces of described light source 13B will not directly through described housing 40B and Described light hole 41B enters in described dark chamber 42B, by such mode, it is ensured that anti-by object The light penetrated is will not be disturbed when described light hole 41B enters in described dark chamber 42B, thus protects Card utilizes the described optical imaging device reliability when gathering the image of object.
Preferably, in a better embodiment of the present invention, described housing 40B can be connect by penetrance Inorganic or the organic material being bordering on zero is made.In another better embodiment of the present invention, described housing 40B can be made up of any material, and then outer surface and/or inner surface at described housing 40B coat or paste Attached one layer of reflectorized material or light absorbent.By the way of above-mentioned, described housing 40B can stop described light Housing 40B described in the light penetration that source 13B produces and disturb the light in described dark chamber 42B.
It addition, in one of the present invention preferably embodiment, the position of described light source 13B is less than described The plane at the place, side being provided with described light hole 41B of housing 40B, by such mode, described light The light that source 13B produces directly will not enter into described dark chamber 42B by described light hole 41B.At this Another of invention is preferably in embodiment, and described light source 13B can also have good light tropism, from And the light that described light source 13B produces can be radiated to described image acquisition region 51B more concentratedly, and not Can spread, thus the light that described light source 13B produces will not directly be entered by described light hole 41B To described dark chamber 42B.
In other words, in the described optical imaging device of the present invention, it is possible to entered by described light hole 41B Light in described dark chamber 42B is the light being reflected by the object, thus improves described optical imaging device Image quality.
Further, described light source 13B can include at least one light-emitting component, thus at one of the present invention Preferably in embodiment, the every described light-emitting component of described light source 13B can be along described housing 40B's Outer surface is positioned apart from；At another of the present invention preferably in embodiment, described light source 13B's is every Described light-emitting component circumferentially can be arranged along the outer surface of described housing 40B, so that described light source 13B The light produced can more uniformly be radiated to described image acquisition region 51B.
Further, the every described light-emitting component of described light source 13B can produce purple individually or simultaneously The light such as outer light, infrared light, visible ray.The luminescence feature of the every described light-emitting component of described light source 13B by The resolution reached required for described optical imaging device and the type decided of described photo-sensitive cell 30B, such as Described photo-sensitive cell 30B can sense the light such as ultraviolet light, infrared light, visible ray.It addition, described sense The size of optical element 30B is determined by the size of described image acquisition region 51B and the aperture of described light hole 41B Fixed.
Further, the size of described image acquisition region 51B makes according to the actual of described optical imaging device Determining by situation, the size of the most described image acquisition region 51B can be according to the object of collected image Size determines, and after the size of described image acquisition region 51B determines, described load-carrying unit 50B Size determine the most therewith.It will be understood by those of skill in the art that the size of described load-carrying unit 50B is big In or equal to the size of described image acquisition region 51B, and described load-carrying unit 50B is by transparent material Make.Such as, when described optical imaging device is implemented as a physical characteristics collecting device, and it is used for gathering During the image of fingerprint, the size of described image acquisition region 51B of described optical imaging device is by the chi of finger tip Very little decision.Inorganic or the organic material that described load-carrying unit 50B can select transmitance higher is made, and Described load-carrying unit 50B is on the basis of proof strength, and its thickness can be made the thinnest, so that described Load-carrying unit 50B can bear the object of collected image and put on the power of described load-carrying unit 50B.
It addition, described optical imaging device can also include that a wiring board 60B, described photo-sensitive cell 30B are electrically connected It is connected to described wiring board 60B, described wiring board 60B for by the photosurface conversion of described photo-sensitive cell 30B The signal of telecommunication relevant to the object of collected subject image transfers out, thus is being subsequently formed collected image The image of object.Preferably, in one of the present invention preferably embodiment, described photo-sensitive cell 30B It is mounted on described wiring board 60B, described wiring board 60B and is mounted on described housing 40B.At another of the present invention In individual preferred embodiment, described photo-sensitive cell 30B and described wiring board 60B is mounted on described housing 40B respectively Not homonymy, thus the heat that described photo-sensitive cell 30B operationally produces is not result in described wiring board 60B Deformation, to guarantee the planarization of described photo-sensitive cell 30B.In the described optical imaging device of the present invention, The type of described wiring board 60B can be unrestricted, and the most described wiring board 60B can be FPC wiring board (pliability printed substrate), so so that the thickness of described wiring board 60B is thinner, to drop significantly The thickness of low described optical imaging device.
It is the optical imaging device provided according to another preferred embodiment of the invention as shown in Figure 9.Specifically Say, described optical imaging device include a photo-sensitive cell 30C, a housing 40C, a load-carrying unit 50C and One substrate 70C, described housing 40C have a light hole 41C.Described housing 40C is arranged at described substrate 70C, to form a dark chamber 42C, described light hole 41C between described housing 40C and described substrate 70C It is communicated in described dark chamber 42C and the external environment condition of described housing 40C, say, that described housing 40C's The light of external environment condition only can enter into the inside of described dark chamber 42C by described light hole 41C.Described Photo-sensitive cell 30C is housed inside described dark chamber 42C, and described light hole 41C is corresponding to described photosensitive unit The photosurface of part 30C.Preferably, described light hole 41C is corresponding to the photosurface of described photo-sensitive cell 30C Center.The photosurface of described photo-sensitive cell 30C and the inner surface of described housing 40C are not in contact with, Thus form described optical imaging device between the photosurface of described housing 40C and described photo-sensitive cell 30C Image distance.
Described load-carrying unit 50C is positioned apart from described housing 40C so that described load-carrying unit 50C and Described housing 40C is not in contact with, thus forms institute between described load-carrying unit 50C and described housing 40C State the object distance of optical imaging device.The sidepiece of described load-carrying unit 50C forms image acquisition region 51C, institute State image acquisition region 51C and described housing 40C is positioned at the not homonymy of described load-carrying unit 50C, and institute State image acquisition region 51C to be positioned on the photosensitive path of described photo-sensitive cell 30C.
Different from the described optical imaging device that above preferred embodiment provides, the most real at this of the present invention Executing in the described optical imaging device that example provides, described housing 40C farther includes upper housing part 43C and extremely Few shell portion, side 44C, the most every described side shell portion 44C are respectively deviously from the edge of described upper housing part 43C Extend to described substrate 70C, thus at described upper housing part 43C, every described side shell portion 44C and described substrate Forming described dark chamber 42C between 70C, described light hole 41C is located at described upper housing part 43C.Preferably, institute State the plane at the photosurface place of photo-sensitive cell 30C, the plane at described upper housing part 43C place and described carrying The plane at element 50C place is parallel to each other, and by such mode, adopts utilizing described optical imaging device When collecting the image of object so that each position of object can imaging equably.
It is noted that described upper housing part 43C and every described side shell portion 44C can a sheet material integratedly Formed, it is also possible to being formed by multiple board material splices, the present invention is unrestricted in this regard.
Further, described optical imaging device can also include a light source 13C, and described light source 13C is neighboringly It is arranged at described housing 40C, and described light source 13C and described housing 40C is positioned at described load-carrying unit 50C Homonymy.When the image utilizing described optical imaging device to gather object, the light that described light source 13C produces Line can directly be radiated to be placed on the thing of described image acquisition region 51C through described load-carrying unit 50C The surface of body, is then reflected by the surface of object, thus the light being reflected by the object is through described load-carrying unit Enter in described dark chamber 42C after the described light hole 41C of 50C and described housing 40C, and further Received by the photosurface of described photo-sensitive cell 30C and carry out photoelectric conversion, to generate the thing with collected image The signal of telecommunication that body is relevant.
Preferably, described light source 13C can be arranged on described substrate 70C, by such mode, The position of described light source 13C can be less than the plane at the described upper housing part 43C place of described housing 40C, thus The light that described light source 13C is produced will not be by being located at the described light hole 41C of described upper housing part 43C It is directly entered in described dark chamber 42C, to guarantee described optical imaging device reliability when in use.
It addition, described optical imaging device can also include that a wiring board 60C, described photo-sensitive cell 30C are electrically connected It is connected to described wiring board 60C, described wiring board 60C for by the photosurface conversion of described photo-sensitive cell 30C The signal of telecommunication relevant to the object of collected image transfers out, thus is being subsequently formed the object of collected image Image.
Preferably, in one of the present invention preferably embodiment, described photo-sensitive cell 30C is mounted on institute State wiring board 60C, described wiring board 60C and be mounted on described substrate 70C.
At another of the present invention preferably in embodiment, described photo-sensitive cell 30C is mounted on described circuit Plate 60C, described substrate 70C have a receptive cavity 71C, described wiring board 60C and are arranged at described receptive cavity In 71C, by such mode, the height of described optical imaging device can be significantly decreased, so that Described optical imaging device thinner.
In another of the present invention preferably in embodiment, described wiring board 60C and described photo-sensitive cell 30C Can also be mounted on the not homonymy of described substrate 70C respectively, so, described photo-sensitive cell 30C is operationally The heat produced will not make described wiring board 60C produce deformation, thus does not interferes with described photo-sensitive cell 30C Flatness.
It will be appreciated by those skilled in the art that, described substrate 70C can by heat conduction and heat dispersion relatively Good material is made, and such as stainless steel material, so, described substrate 70C can not only ensure described photosensitive The flatness of element 30C, but also described optical imaging device can be made to dispel the heat rapidly, so that it is guaranteed that institute State optical imaging device stability operationally.
Further, described optical imaging device can also include a support component 80C, wherein said support unit Part 80C is arranged at described substrate 70C, described load-carrying unit 50C and is arranged at described support component 80C, with Described load-carrying unit 50C is enable to be supported by described load-carrying unit 80C.Preferably, described support component 80C The material low by transmitance is made, to avoid the light outside described optical imaging device to described light source 13C The light produced produces interference, so that it is guaranteed that the precision that described image formation by rays device is when gathering the image of object.
At another of the present invention preferably in embodiment, the height of described support component 80C can also quilt Regulation, say, that by adjusting described support component 80C, thus it is possible to vary described load-carrying unit 50C and institute State the distance between upper housing part 43C of housing 40C, thus change the object distance of described optical imaging device, with This, make described optical imaging device meet different use demands.
It is the light of a variant embodiment offer of the above preferred embodiment according to the present invention as shown in Figure 10 Learn imaging device.Specifically, described optical imaging device include a photo-sensitive cell 30D, a housing 40D, An one load-carrying unit 50D and wiring board 60D, described housing 40D have a light hole 41D.Described sense Optical element 30D and described housing 40D is mounted on described wiring board 60D respectively, with at described housing 40D and Between described wiring board 60D formed a dark chamber 42D, described light hole 41D be communicated in described dark chamber 42D and The external environment condition of described housing 40D, say, that the light of the external environment condition of described housing 40D is the most permissible The inside of described dark chamber 42D is entered into by described light hole 41D.Described photo-sensitive cell 30D is housed inside Described dark chamber 42D, and described light hole 41D is corresponding to the photosurface of described photo-sensitive cell 30D.Preferably Ground, described light hole 41D is corresponding to the center of the photosurface of described photo-sensitive cell 30D.Described photosensitive The photosurface of element 30D and the inner surface of described housing 40D are not in contact with, thus at described housing 40D and The image distance of described optical imaging device is formed between the photosurface of described photo-sensitive cell 30D.
Described load-carrying unit 50D is positioned apart from described housing 40D so that described load-carrying unit 50D and Described housing 40D is not in contact with, thus forms institute between described load-carrying unit 50D and described housing 40D State the object distance of optical imaging device.The sidepiece of described load-carrying unit 50D forms image acquisition region 51D, Described image acquisition region 51D and described housing 40D are positioned at the not homonymy of described load-carrying unit 50D, described Image acquisition region 51D is positioned on the photosensitive path of described photo-sensitive cell 30D.
Described housing 40D farther includes upper housing part 43D and at least side shell portion 44D, wherein every described Shell portion, side 44D extends to described wiring board 60D the most deviously from the edge of described upper housing part 43D, thus Described dark chamber is formed between described upper housing part 43D, every described side shell portion 44D and described wiring board 60D 42D, described light hole 41D are located at described upper housing part 43D.Preferably, described upper housing part 43D place Plane is parallel to the plane at described load-carrying unit 50D place, by such mode, is utilizing described optics When imaging device gathers the image of object so that each position of object can imaging equably.
Further, described optical imaging device can also include a light source 13D, and described light source 13D is neighbouring Be arranged at described housing 40D, and described light source 13D and described housing 40D is positioned at described load-carrying unit The homonymy of 50D.When the image utilizing described optical imaging device to gather object, described light source 13D produces Light directly can be radiated to be placed on described image acquisition region 51D through described load-carrying unit 50D The surface of object, then reflected by the surface of object, thus the light being reflected by the object be through described carrying Enter in described dark chamber 42D after the described light hole 41D of element 50D and described housing 40D, go forward side by side One step is received by the photosurface of described photo-sensitive cell 30D and carries out photoelectric conversion, to generate and collected image The relevant signal of telecommunication of object.
Preferably, described light source 13D can be arranged on described wiring board 60D, by such mode, The position of described light source 13D can be less than the plane at the described upper housing part 43D place of described housing 40D, thus The light that described light source 13D is produced will not be by being located at the described light hole 41D of described upper housing part 43D It is directly entered in described dark chamber 42D, to guarantee described optical imaging device reliability when in use.Separately Outward, described light source 13D and described photo-sensitive cell 30D can also share the circuit of described wiring board 60D, from And make the concordance of described optical imaging device more preferable.
It is highly preferred that described wiring board 60D is PCB, so that described wiring board 60D has necessarily Hardness, and described wiring board 60D will not produce deformation at a higher temperature such that it is able to ensure quilt It is mounted on the planarization of the described photo-sensitive cell 30D of described wiring board 60D.
Further, described optical imaging device can also include a support component 80D, wherein said support unit Part 80D is arranged at described wiring board 60D, described load-carrying unit 50D and is arranged at described support component 80D, So that described load-carrying unit 50D is supported by described support component 80D.Preferably, described support component 80D The material low by transmitance is made, to avoid the light outside described optical imaging device to described light source 13D The light produced produces interference, so that it is guaranteed that the precision that described image formation by rays device is when gathering the image of object.
It is the optical imaging device that provides of further embodiment according to the present invention as shown in figure 11.Specifically Say, described optical imaging device include a photo-sensitive cell 30E, a housing 40E, a load-carrying unit 50E, one A substrate 70E and support component 80E.Described housing 40E has a light hole 41E, described photo-sensitive cell 30E and described support component 80E is respectively arranged at described substrate 70E, described housing 40E and includes a upper housing part 43E, the surrounding of described upper housing part 43E extends respectively to described support component 80E, thus at described housing 40E Described upper housing part 43E and described substrate 70E between formed a dark chamber 42E, described light hole 41E is located at Described upper housing part 43E, and described light hole 41E is communicated in described dark chamber 42E and described housing 40E External environment condition, say, that the light of the external environment condition of described housing 40E only can pass through described light hole 41E enters into the inside of described dark chamber 42E.Described photo-sensitive cell 30E is housed inside in described dark chamber 42E, And described light hole 41E is corresponding to the photosurface of described photo-sensitive cell 30E.Preferably, described light hole 41E is corresponding to the center of the photosurface of described photo-sensitive cell 30E.The photosurface of described photo-sensitive cell 30E It is not in contact with described upper housing part 43E of described housing 40E, thus at the described upper casing of described housing 40E The image distance of described optical imaging device is formed between the photosurface of portion 43E and described photo-sensitive cell 30E.
It is noted that in one of the present invention preferably embodiment, described housing 40E and support unit Part 80E can also form, thus forms described optical imagery respectively in the both sides of described housing 40E The image distance of device and object distance.
Described load-carrying unit 50E is supported by described support component 80E, and described load-carrying unit 50E and institute Described upper housing part 43E stating housing 40E is not in contact with, thus at described load-carrying unit 50E and described housing The object distance of described optical imaging device is formed between described upper housing part 43E of 40E.Described load-carrying unit 50E Sidepiece form image acquisition region 51E, described image acquisition region 51E and described housing 40E and be positioned at institute State the not homonymy of load-carrying unit 50E, and described image acquisition region 51E is positioned at described photo-sensitive cell 30E Photosensitive path on.
Preferably, the plane at the photosurface place of described photo-sensitive cell 30E, described upper housing part 43E place The plane at plane and described load-carrying unit 50E place is parallel to each other, and by such mode, is utilizing described light When learning the image that imaging device gathers object so that each position of object can imaging equably.
Further, described optical imaging device can also include that a light source 13E, described light source 13E are arranged at Described upper housing part 43E of described housing 40E.When the image utilizing described optical imaging device to gather object, The light that described light source 13E produces directly can be radiated to be placed on through described load-carrying unit 50E described The surface of the object of image acquisition region 51E, is then reflected by the surface of object, thus the light being reflected by the object Line enters into described dark chamber after the light hole 41E through described load-carrying unit 50E and described housing 40 In 42E, and received by the photosurface of described photo-sensitive cell 30E further and carry out photoelectric conversion, with generate with The signal of telecommunication that the object of collected image is relevant.
It addition, described optical imaging device can also include that a wiring board 60E, described photo-sensitive cell 30E are electrically connected Be connected to described wiring board 60E, described wiring board 60E for the photosurface of described photo-sensitive cell 30E is converted with The signal of telecommunication that the object of collected image is relevant transfers out, thus is being subsequently formed the object of collected image Image.Preferably, in one of the present invention preferably embodiment, described photo-sensitive cell 30E is mounted on institute State wiring board 60E, described wiring board 60E and be mounted on described substrate 70E.The present invention another preferably In embodiment, described photo-sensitive cell 30E is mounted on described wiring board 60E, described substrate 70E to be had one and connects It is arranged in described receptive cavity 71E by chamber 71E, described wiring board 60E, by such mode, Ke Yixian Write ground and reduce the height of described optical imaging device, so that described optical imaging device is thinner.
In another of the present invention preferably in embodiment, described wiring board 60E and described photo-sensitive cell 30E Can also be mounted on the not homonymy of described substrate 70E respectively, so, described photo-sensitive cell 30E is operationally The heat produced will not make described wiring board 60E produce deformation, thus does not interferes with described photo-sensitive cell 30E Flatness.
It will be appreciated by those skilled in the art that, described substrate 70E can be by heat conduction and good heat dispersion performance Material make, such as stainless steel material, so, described substrate 70E can not only ensure described photo-sensitive cell The flatness of 30E, but also described optical imaging device can be made to dispel the heat rapidly, so that it is guaranteed that described optics Imaging device stability operationally.
It is the light of a variant embodiment offer of the above preferred embodiment according to the present invention as shown in figure 12 Learn imaging device.Specifically, described optical imaging device include a photo-sensitive cell 30F, a housing 40F, One load-carrying unit 50F, a wiring board 60F and a support component 80F.Described housing 40F has a light hole 41F, described photo-sensitive cell 30F and described support component 80F are respectively arranged at described wiring board 60F, described Housing 40F includes that upper housing part 43F, the surrounding of described upper housing part 43F extend respectively to described support component 80F, thus between described upper housing part 43F and described wiring board 60F of described housing 40F, form a dark chamber 42F, described light hole 41F are located at described upper housing part 43F, and described light hole 41F be communicated in described secretly The external environment condition of chamber 42F and described housing 40F, say, that the light of the external environment condition of described housing 40F Line only can enter into the inside of described dark chamber 42F by described light hole 41F.Described photo-sensitive cell 30F It is housed inside in described dark chamber 42F, and described light hole 41F is corresponding to the sense of described photo-sensitive cell 30F Bright finish.Preferably, described logical light-operated 41F is corresponding to the center of the photosurface of described photo-sensitive cell 30F. The photosurface of described photo-sensitive cell 30F and described upper housing part 43F of described housing 40F are not in contact with, thus Formed described between described upper housing part 43F and the photosurface of described photo-sensitive cell 30F of described housing 40F The image distance of optical imaging device.
Described load-carrying unit 50F is supported by described support component 80F, and described load-carrying unit 50F and institute Described upper housing part 43F stating housing 40F is not in contact with, thus at described load-carrying unit 50F and described housing The object distance of described optical imaging device is formed between described upper housing part 43F of 40F.Described load-carrying unit 50F's Sidepiece forms image acquisition region 51F, and described image acquisition region 51F is positioned at described photo-sensitive cell 30F's On photosensitive path.
Preferably, the plane at the photosurface place of described photo-sensitive cell 30F, described upper housing part 43F place flat The plane at face and described load-carrying unit 50F place is parallel to each other, and by such mode, is utilizing described optics When imaging device gathers the image of object so that each position of object can imaging equably.
Further, described optical imaging device can also include that a light source 13F, described light source 13F are arranged at Described upper housing part 43F of described housing 40F.When the image utilizing described optical imaging device to gather object, The light that described light source 13F produces directly can be radiated to be placed on described figure through described load-carrying unit 50F As the surface of the object of pickup area 51F, then reflected by the surface of object, thus the light being reflected by the object Enter into after the described light hole 41F through described load-carrying unit 50F and described housing 40F described secretly In the 42F of chamber, and received by the photosurface of described photo-sensitive cell 30F further and carry out photoelectric conversion, to generate The signal of telecommunication relevant to the object of collected image.
During utilizing described optical imaging device to gather subject image, need the object of collected image Being placed in described image acquisition region 51F, the light that described light source 13F sends can pass described load-carrying unit 50F also exposes to the surface of object, and now, light can be reflected in the surface of object, and makes light again pass through institute State load-carrying unit 50F and described light hole 41F, to enter in described dark chamber 42F, thus be arranged at institute State the photosurface of the described photo-sensitive cell 30F in dark chamber 42F and receive and carry out follow-up photoelectric conversion, then with The signal of telecommunication that object is relevant transfers out by described wiring board 60F further.
In this process, the light that described light source 13F produces does not passes through described housing 40F and is directly entered In described dark chamber 42F, thus reflected by the surface of object and by described light hole 41F enter into described secretly Light in the 42F of chamber will not be disturbed, so that it is guaranteed that the quality of the image of described optical imaging device collection.
As shown in Figure 13 and Figure 14, present invention also offers the method for designing of described optical imaging device.Really When determining the actual application environment of described optical imaging device, the scope ginseng being imaged thing of described optical imaging device The value of number F determines therewith.
It addition, in the present invention, set the thing high parameter of described optical imaging device as U, and described optics The thing height U of imaging device is less than or equal to the height of described image acquisition region 51C；；Set described light The image height parameter learning imaging device is V, and the image height V of described optical imaging device is less than or equal to institute State the height of photo-sensitive cell 30C；A diameter of aperture of described light hole 41C, and set described optical imagery The aperture parameters of device is Φ；Described upper housing part 43C of described housing 40C is with described photo-sensitive cell 30C's Distance between photosurface is image distance, and sets the image distance parameter of described optical imaging device as X；Described housing Distance between described upper housing part 43C and the described load-carrying unit 50C of 40C is object distance, and sets described light The object distance parameter learning imaging device is W.
Figure 14 shows the design process 1400 of the described optical imaging device of the present invention.Stage 1410: according to The specifically used environment of described optical imaging device, determines the height of described optical imaging device.It is worth mentioning It is that the height of described optical imaging device includes that described upper housing part 43C of described housing 40C is photosensitive with described Distance, described upper housing part 43C of described housing 40C and described carrying unit between the photosurface of element 30C The thickness of itself of distance between part 50C and these elements and tolerance, say, that described light studies As the height of device at least includes image distance X and object distance Y of described optical imaging device.
In the stage 1420: after the height of described optical imaging device is determined, define described optical imagery dress The thing height U put, so, the size of described image acquisition region 51C is also with determining, the most described image is adopted The size of collection region 51C is more than or equal to the thing height U of described optical imaging device.Such as, when described light When learning the described physical characteristics collecting device that imaging device is implemented as gathering fingerprint, described image acquisition areas The area of territory 51C is area matched with finger tip.
Stage 1430: determine image distance X of described optical imaging device according to the height of described optical imaging device With object distance W, imaging thing scope F of wherein said optical imaging device and the aperture of described optical imaging device The relation of Φ, image distance X and object distance W meets function expression: F=Φ (W/X+1), is ensureing described light On the basis of learning the resolution of imaging device, the value of the aperture Φ of described optical imaging device can be calculated.Excellent Selection of land, according to the straightline propagation principle of light, and ensures the image quality of described optical imaging device, described The aperture of light hole 41C is more than or equal to the thickness of described upper housing part 43C of twice.
It will be understood by those of skill in the art that according to function expression F=Φ (W/X+1), at described optics In the case of the height of imaging device determines, can by adjust the image distance of described optical imaging device, object distance and Aperture, ensures the imaging thing scope of described optical imaging device, and further ensures that described optical imaging device There is preferable resolution.Such as, in the case of the aperture of described optical imaging device determines, described optics The image distance of imaging device is the biggest, and the imaging thing scope of the most described optical imaging device is the least, on the contrary the most described optics The imaging thing scope of imaging device is the biggest；In the case of the object distance of described optical imaging device and image distance determine, The aperture of described optical imaging device is the biggest, and the imaging thing scope of the most described optical imaging device is the biggest, otherwise then The scope of described optical imagery thing is the least.
Further, the image height V of described optical imaging device and described optical imaging device thing height U, as Relation away from X, object distance W and aperture Φ meets function expression: V=[UX+ Φ (W+X)]/W, thus, By calculating the value of the image height V that can obtain described optical imaging device.It is to say, study at described light After determining as thing height, object distance, image distance and the aperture of device, the picture of described optical imaging device can be calculated Height, by such mode, the size of described photo-sensitive cell 30C can be according to calculated described optics The value of the image height V of imaging device selects, thus, the image height V of described optical imaging device determines described The size of photo-sensitive cell 30C.
Stage 1440: in the thing height, image height, object distance, image distance and the aperture that determine described optical imaging device And after the size of described photo-sensitive cell 30C, select the institute with appropriate pixels value and pixel size State photo-sensitive cell 30C, mate described optical imaging device, thus improve the imaging of described optical imaging device Quality.
Stage 1450: select the luminous body with appropriate light wavelength degree and light intensity as the described light of the present invention Learn the described light source 13C of imaging device.It is noted that described light source 13C is meeting described optical imagery Needed for device while brightness, the characteristics of luminescence of described light source 13C also to reach described optical imaging device Resolution requirement, and the type matching of the characteristics of luminescence of described light source 13C and described photo-sensitive cell 30C.
Stage 1460: test the described optical imaging device designed, to judge that described light studies As whether the imaging effect of device meets imaging needs, if the imaging effect of described optical imaging device meets imaging Need, then show that the design of described optical imaging device completes, if the imaging effect of described optical imaging device is not Disclosure satisfy that imaging needs, then readjust described optics according to function expression V=[UX+ Φ (W+X)]/W The relevant parameter of imaging device, till the imaging effect of described optical imaging device meets imaging needs.
Further, the present invention also provides for the method for designing of a kind of optical imaging device, wherein said method for designing Comprise the steps:
H (), according to the use environment of described optical imaging device, determines the height of described optical imaging device respectively Degree and imaging thing scope；
I thing that () defines described optical imaging device is high；
J () is high according to height, imaging thing scope and the thing of described optical imaging device, calculate described light and study As the object distance of device, image distance, aperture and image height；And
K () configuration meets the light source 13C needed for described optical imaging device.
Preferably, in described step (j), farther include step:
Step (j.1) is according to the image height of described optical imaging device, needed for configuration meets described optical imaging device A photo-sensitive cell 30C；With
Step (j.2), according to the resolution of described optical imaging device, selects to meet described optical imaging device institute The described photo-sensitive cell 30C with suitable pixel quantity and Pixel Dimensions needed.
Preferably, after described step (k), further comprise the steps of:
L () detects whether the image quality of described optical imaging device meets use needs, if meeting, described The design of optical imaging device completes, if being unsatisfactory for, repeats described step (j).
Preferably, in the above-mentioned methods, the imaging thing range parameter of described optical imaging device is set as F, if The aperture parameters of fixed described optical imaging device is Φ, sets the image distance parameter of described optical imaging device as X, Set the object distance parameter of described optical imaging device as W；The imaging thing scope of wherein said optical imaging device Function expression: F=Φ (W/X+1) is met with the relation of aperture, object distance and the image distance of described optical imaging device.
Preferably, in the above-mentioned methods, set the thing high parameter of described optical imaging device as U, set described The image height parameter of optical imaging device is V；The image height of wherein said optical imaging device fills with described optical imagery The relation of thing height, aperture, object distance and the image distance put meets function expression: V=[UX+ Φ (W+X)]/W.
The present invention also provides for the forming method of a kind of optical imaging device, and wherein said forming method includes walking as follows Rapid:
I one photo-sensitive cell 30C is inserted a dark chamber 42C by (), wherein said dark chamber 42C passes through a light hole 41C is communicated in the external environment condition of described dark chamber 42C, and described light hole 41C is corresponding to described photosensitive unit The photosurface of part 30C；
(ii) image acquisition region 51C is formed in the photosensitive path of described photo-sensitive cell 30C, wherein said Image acquisition region 51C is positioned at the top of described light hole 41C, and described image acquisition region is for placing The object of collected image；And
(iii) arrange a light source 13C to produce in the external environment condition of described dark chamber 42C, wherein said light source 13C Raw light, after being radiated to described image acquisition region 51C, is placed on described image acquisition region 51C Object reflection, reflected light line enters into described dark chamber 52C, with described through described light hole 51C The photosurface of photo-sensitive cell 30C receives.
Preferably, in the above-mentioned methods, described light hole 41C corresponds to the photosensitive of described photo-sensitive cell 30C The center in face.
Preferably, further comprise the steps of: in described step (i)
(i.1) described photo-sensitive cell 30C is arranged at a substrate 70C；And
(i.2) provide there is the housing 40C of described light hole 41C, with at described housing 40C and described Form described dark chamber 42C between substrate 70C, and make described photo-sensitive cell 30C be positioned at described dark chamber 42C.
Preferably, further comprise the steps of: in described step (ii)
One load-carrying unit 50C, described load-carrying unit 50C are set on the top of described housing 40C and are formed described Image acquisition region 51C.
It is noted that the present invention also provides for a kind of electronic equipment 90, wherein said electronic equipment 90 includes Optical imaging device, in the different embodiment of the present invention, described optical imaging device can assist described electricity Subset realizes different functions.
It is the electronic equipment 90J that provides of first preferred embodiment according to the present invention as shown in figure 15, wherein Described electronic equipment 90J can be physical characteristics collecting device, such as a fingerprint capturer etc..Described electronics sets Standby 90J is used for such as fingerprint, palmmprint or the foot stricture of vagina etc. of assisted acquisition user at interior biological characteristic.
Specifically, described electronic equipment 90J can include attachment means 91J and described optical imaging device 100J, described optical imaging device 100J are communicatively coupled with described attachment means 91J, described attachment means 91J is suitable to be communicatively connected to an electrical equipment, such as computer etc..In use, user can be by finger tip etc. The position needing collected image is placed on the described image acquisition region 51 of described optical imaging device 100J, Now, the surface of the light radiation that described light source 13 produces to finger tip, the surface of finger tip is by light line reflection, quilt The light of the surface reflection of finger tip is entering in described dark chamber 42, with by institute after described light hole 41 The photosurface stating photo-sensitive cell 30 receives and carries out photoelectric conversion, to generate the signal of telecommunication relevant to finger tip, and electricity Signal is by described attachment means 91J transmission to described electrical equipment, such that it is able to generate the image relevant to finger tip.
In one of the present invention preferably embodiment, described attachment means 91J may be implemented as one USB connector, when using described electronic equipment 90J, can insert described by described attachment means 91J The mode of the connector of electrical equipment, is connected to described electrical equipment by described electronic equipment 90J, thus described electronic equipment The biological characteristic of the user gathered can be transmitted to described electrical equipment by 90.
At another of the present invention preferably in embodiment, described attachment means 90J can also be implemented as one Individual communication module, such as bluetooth module, Wi-Fi module etc., when using described electronic equipment, can pass through Described attachment means 91J is wirelessly connected with the communication module of described electrical equipment, thus described electronic equipment 90J can The biological characteristic transmission extremely described electrical equipment of the user gathering.
It is the electronic equipment that provides of second preferred embodiment according to the present invention as shown in Figure 16 and Figure 17 90K, wherein said electronic equipment 90K can be mobile electronic devices, such as mobile phone, panel computer, pen Remember that this computer, electricity paper book or personal digital assistant etc. can be by the mobile Portable mobile electronic devices used. Described optical imaging device 100K can gather the biological characteristic such as fingerprint characteristic of user, described with auxiliary Electronic equipment 90K realizes the identification to user.
Specifically, described electronic equipment 90K includes an apparatus body 92K and described optical imaging device 100K, wherein said optical imaging device 100K are communicatively connected to described apparatus body 92K.Using Before described electronic equipment 90K, described optical imaging device 100K can gather the biological characteristic example of user Such as fingerprint characteristic, and transmitting it to described apparatus body 92K, follow-up, described apparatus body 92K will be by The image gathered is compared with the image being pre-stored in described apparatus body 92K, if the match is successful, then described Apparatus body 92K thinks that this user is legitimate user, if it fails to match, and the most described apparatus body 92K Think that this user is illegal user.
It will be appreciated by those skilled in the art that, for the optical imaging system of prior art, this The described optical imaging device 100K of invention is because need not the optical element such as prism, lens, so that institute The thickness stating optical imaging device 100K is thinner, and then described optical imaging device 100K can be suitable for In pursuing lightening, the described electronic equipment 90K of miniaturization.
It will be appreciated by those skilled in the art that, described optical imaging device 100K can be configured in institute State the diverse location of apparatus body 92K, so that the occupation mode of described electronic equipment 90K is different.
In this example as shown in figure 16, described apparatus body 92K includes a button 921K, such as Described button 921K can be main button (such as Home button) or the switch of described electronic equipment 90K Machine button, described optical imaging device 100K is arranged in correspondence with in described button 921K, now described in press Button 921K can form the described load-carrying unit 50 of described optical imaging device 100K, thus at described button Described image acquisition region 51 is formed at the top of 921K, thus, when user is grasped by described button 921K When making described electronic equipment 90K, the fingerprint that described optical imaging device 100K can synchronously gather user is special Levy, for the follow-up identification to user.
In this example as shown in figure 17, described apparatus body 92K includes a display screen 922K, Described optical imaging device 100K is arranged in correspondence with in described display screen 922K, the most described display screen Curtain 922K can form the described load-carrying unit 50K of described optical imaging device 100K, thus in described display Described image acquisition region 51 is formed on screen 922K；Correspondingly, described display screen 922K also can be formed The described light source 13 of described optical imaging device 100K, thus, when described display screen 922K produces light, And user is when being placed on described image acquisition region 51 by finger tip, described optical imaging device 100K can adopt The fingerprint characteristic of collection user, for follow-up identification.
It it is the electronic equipment that provides of the 3rd preferred embodiment according to the present invention as shown in Figure 18 to Figure 20 90L, wherein said electronic equipment 90L can be applied to a gate control system or safety cabinet safety lock.Described Optical imaging device 100L can gather the biological special word such as fingerprint characteristic of user, to assist described electronics The equipment 90L identification to user.
Specifically, described electronic equipment 90L includes an apparatus body 92L and described optical imaging device 100L, described apparatus body 92L farther include a processor 923L and a lock body 924L, described optics Imaging device 100L is communicatively connected to described processor 923L, described processor 923L and operationally connects It is connected to described lock body 924L, described lock body 924L for controlling to be provided with gate or the peace of described gate control system States of cabinet door equipped with described safety cabinet safety lock.
During the use of described electronic equipment 90L, described optical imaging device 100L gathers user Biological characteristic such as fingerprint characteristic, and transmit it to described processor 923L and compare, if the match is successful, The most described processor 923L operates described lock body 924L and opens, if it fails to match, and the most described processor 923L Generate the instruction making described lock body 924L keep lock-out state.
If Figure 21 is the electronic equipment 90M that the 4th preferred embodiment according to the present invention provides, wherein said Electronic equipment 90M can be a payment terminal, such as POS (Point Of Sales) etc..Described electronics Equipment 90M includes an apparatus body 92M and an optical imaging device 100M, described optical imaging device 100M can gather the biological characteristic such as fingerprint characteristic of user, for the payment completing statement.
So, when using described electronic equipment 90M statement to pay, described optical imaging device 100M can gather the biological characteristic such as fingerprint characteristic of user, and now, described electronic equipment 90M is permissible The image of collection and the image being pre-stored in described electronic equipment 90M are compared, if the match is successful, then institute State electronic equipment 90M and think that the identity of this user is legal, thus complete the payment of statement, if coupling is Quilt, the most described electronic equipment 90M thinks that the identity of this user is illegal, thus the payment of statement failure.
It is the electronic equipment 90N that provides of the 5th preferred embodiment according to the present invention as shown in figure 22, wherein Described electronic equipment 90N can be an express delivery terminal, and described electronic equipment 90N includes an apparatus body 92N With the biological characteristic example that optical imaging device 100N described in an optical imaging device 100N can gather user Such as fingerprint characteristic, for completing quick despatch is signed for.
It is the electronic equipment 90S that provides of the 6th preferred embodiment according to the present invention as shown in figure 23, wherein Described electronic equipment 90S is a medical apparatus and instruments such as endoscope etc..This preferred embodiment in the present invention In, the image that described optical imaging device 100S gathers is not used to be identified the identity of user, But it is applied to medical diagnosis and treatment.
Specifically, described electronic equipment 90S includes an apparatus body 92S and described optical imaging device 100S, wherein said optical imaging device 100S are arranged at described apparatus body 92S, and at described equipment The housing of body 92S forms the described load-carrying unit 50 of described optical imaging device 100S, thus sets described The hull outside of standby body 92S forms described image acquisition region 51S of described optical imaging device 100S. So, during described electronic equipment 90S is used, press close to the described equipment of described electronic equipment 90S The feature of the position of body 92S can be gathered by described optical imaging device 100S, with subsequently through with The electrical equipment display image that described electronic equipment 90S communication connects.Compared with the endoscope of prior art, described electricity The highly significant ground of the described optical imaging device 100S of subset 90S reduces, so that described electronic equipment 90S Volume can synchronously reduce, thus be conducive to expanding the range of application of described electronic equipment 90S.
As shown in figure 24, the present invention also provides for a kind of formation method by an optical imaging device, its feature Being, described method comprises the steps:
(1) light is produced by a light source 13C；
(2) light radiation that described light source 13C produces is to image acquisition region 51C；
(3) light that described light source 13C produces is placed in an object of described image acquisition region 51C Surface is reflected, thus produces by reflection light；
(4) the described light that reflected passes a light hole 41C entrance one dark chamber 42C；And
(5) the described light that reflected is received by a photo-sensitive cell 30C after the described dark chamber 42C of entrance, thus Generate the image relevant to described object.
It should be understood by those skilled in the art that the embodiments of the invention shown in foregoing description and accompanying drawing are only used as Illustrate and be not limiting as the present invention.The purpose of the present invention is completely and be effectively realized.The function of the present invention and Structural principle is shown the most in an embodiment and illustrates, without departing under described principle, and embodiments of the present invention Can there be any deformation or amendment.

Claims (67)

1. an optical imaging system, it is characterised in that including:
One identification carrier, it has a transparent identification region, thing side；
One darkroom housing, wherein said darkroom housing forms a darkroom, and has a through hole, described through hole and institute State darkroom to be connected；
One image sensing apparatus, it includes that an imageing sensor, described imageing sensor are installed in described darkroom； With
One light source, wherein said light source is installed on described darkroom hull outside, is wherein positioned over object when a knowledge During described identification region, thing side, go forward side by side a step in identification region, thing side described in the transmitting light directive that described light source sends Ground arrives described identification subject surface and is reflected, and then passes through described through hole and projects described imageing sensor, from And make described identification object carry out imaging by described optical imaging system by pinhole imaging system principle.
2. optical imaging system as claimed in claim 1, described image sensing apparatus farther includes an electricity Road plate, wherein said circuit board is connected to described imageing sensor.
3. optical imaging system as claimed in claim 2, identification region, described thing side uses has high transmission Inorganic or the organic material of rate makes.
4. optical imaging system as claimed in claim 3, makes the inorganic of described darkroom housing or organic material Material stop light by and form described darkroom.
5. optical imaging system as claimed in claim 4, wherein forms an appearance in described darkroom hull outside Receiving chamber, described light source is installed on one or more positions of described chamber interior.
6. optical imaging system as claimed in claim 5, described light source launches ultraviolet, red individually or simultaneously Outer or visible ray, described imageing sensor is suitable for sensing ultraviolet, infrared or visible ray.
7. the optical imaging system as described in arbitrary in claim 4 to 6, described circuit board is connected to described The diapire of darkroom housing or the diapire as described darkroom housing, to form described darkroom.
8. optical imaging system as claimed in claim 7, described optical imaging system is assembled in a fingerprint and sets Other equipment.
9. optical imaging system as claimed in claim 7, described optical imaging system is integrated in an Intelligent electric Subset, described identification object is fingerprint, thus provides fingerprint identification function for described intelligent electronic device.
10. optical imaging system as claimed in claim 7, described optical imaging system is peeped in being assembled in one Mirror.
11. 1 kinds of optical imaging methods, it is characterised in that comprise the following steps:
(a) source emissioning light line；
The transmitting light of the b described light source of identification region, thing side reception that () is transparent, and it is placed on described thing Side identifies that the identification object in region is by light line reflection；
C () described reflection light projects an imageing sensor by a through hole, thus former by pinhole imaging system Reason makes described identification object carry out imaging.
12. optical imaging methods as claimed in claim 11, in described step (c), described light source Light outside through hole described in directive is stopped by described darkroom housing, thus the light that described light source sends can only Described imageing sensor is arrived by described through hole after being reflected.
13. optical imaging methods as claimed in claim 12, described imageing sensor is installed on described darkroom In one darkroom of housing, described light source is installed on outside described darkroom, identification region, described thing side and described through hole It is arranged in parallel, and keep a spacing.
14. optical imaging methods as claimed in claim 13, the aperture of described through hole, described through hole are to institute State the size of identification region, thing side and the distance of described imageing sensor and described imageing sensor according to aperture Image-forming principle determines.
15. optical imaging methods as claimed in claim 14, identification region, described thing side uses has height thoroughly Cross the inorganic of rate or organic material makes.
In 16. such as claim 10 to 15 arbitrary as described in optical imaging method, described light source individually or with Time launch ultraviolet, infrared or visible ray, described imageing sensor can sense ultraviolet, infrared or visible ray.
17. 1 kinds utilize the method that pinhole imaging system principle formulates optical imaging system, it is characterised in that described Method comprises the following steps:
(A) height overall of whole optical imaging system is formulated；
(B) the induction area U needed for definition identification region, thing side；
(C) the aperture Φ of a through hole, distance W of described through hole a to sensitive surface and described through hole are defined Distance X and corresponding tolerance to an imageing sensor；
(D) suitable imageing sensor is selected；With
(E) select to meet at least one light source needed for system.
18. methods as claimed in claim 17, farther include a step (F) inspection institute must identify right As if the no terminal system that reaches can determine that requirement, if reaching to judge requirement, then complete, if not reaching judgement Requirement, then return step (C) and analyze failure cause, till qualified, wherein said step (F) position After described step (E).
19. methods as claimed in claim 17, in described step (C), according to formula F=Φ (W/X+1), Calculating aperture Φ and tolerance thereof, wherein F represents the scope being imaged thing corresponding to the point on screen.
20. methods as claimed in claim 18, in described step (C), according to formula F=Φ (W/X+1), Calculating aperture Φ and tolerance thereof, wherein F represents the scope being imaged thing corresponding to the point on screen.
21. methods as claimed in claim 19, by formula V=[UX+ Φ (W+X)]/W, calculate image height V and tolerance thereof, the size of wherein said imageing sensor selects according to image height V.
22. methods as claimed in claim 20, by formula V=[UX+ Φ (W+X)]/W, calculate image height V and tolerance thereof, the size of wherein said imageing sensor selects according to image height V.
In 23. such as claim 17 to 22 arbitrary as described in method, described sensitive surface be positioned at described thing side know Other region, wherein said induction area U is the area identifying object of identification region, described thing side sensing.
24. methods as claimed in claim 23, according to distance W of described through hole to described sensitive surface with And described through hole formulates described optical imaging system to distance X of described imageing sensor, described through hole is set On a through-hole wall, identification region, wherein said thing side and described imageing sensor are pacified according to the distance of W and X It is loaded on the relative both sides of described through-hole wall.
25. methods as claimed in claim 24, described sensor is installed in a darkroom, formed described secretly One darkroom housing of room obtains so that the light of darkroom housing is by described darkroom shell described in the directive that sends of described light source Body stops or absorbs.
In 26. such as claim 17 to 22 arbitrary as described in method, in described step (D), select Specification size, pixel value and pixel size all suitably imageing sensor is as the figure of described optical imaging system As sensor.
In 27. such as claim 17 to 22 arbitrary as described in method, in described step (E), select close Suitable emission wavelength and the light source of light intensity, to meet brightness and the resolution requirement of described optical imaging system.
28. 1 kinds of fingerprint recognition systems, to be applied to identify a fingerprint, it is characterised in that including:
One identification carrier, it has a transparent identification region, thing side；
One darkroom housing, wherein said darkroom housing forms a darkroom, and has a through hole, described through hole and institute State darkroom to be connected；
One image sensing apparatus, it includes that an imageing sensor, described imageing sensor are installed in described darkroom；
One light source, wherein said light source is installed on described darkroom hull outside；With
One fingerprint recognition terminal, it is coupled to described image sensing apparatus, wherein when having finger or toe to be placed in institute When stating identification region, thing side, identification region, thing side described in the transmitting light directive that described light source sends is with going forward side by side a step Arrive described finger or toe surface is reflected, then pass through described through hole and project described imageing sensor, from And make described identification object carry out imaging, described fingerprint by described optical imaging system by pinhole imaging system principle The imaging of described fingerprint is judged and identifies by identification terminal.
29. fingerprint recognition systems as claimed in claim 28, described darkroom housing uses light-proof material system Make.
30. fingerprint recognition systems as claimed in claim 29, described through hole is parallel with described imageing sensor Arrange.
In 31. such as claim 28 to 30 arbitrary as described in fingerprint recognition system, described imageing sensor is even Being connected to a circuit board, wherein said circuit board is connected to the diapire of described darkroom housing, thus is used for being formed described Darkroom.
In 32. such as claim 28 to 30 arbitrary as described in fingerprint recognition system, described image sensing apparatus A circuit board is shared with described fingerprint recognition terminal.
In 33. such as claim 28 to 30 arbitrary as described in fingerprint recognition system, wherein said fingerprint recognition System is suitable for making independent fingerprint identification device, or is integrated in an intelligent electronic device.
34. 1 kinds of optical imaging devices, it is characterised in that described optical imaging device include a photo-sensitive cell and One light source, described optical imaging device has an image acquisition region, dark chamber and a light hole；
Wherein said light hole is communicated in the external environment condition in described dark chamber and described dark chamber, and described photo-sensitive cell is positioned at Described dark chamber, and described light hole is corresponding to the photosurface of described photo-sensitive cell, described light source be positioned at described secretly The external environment condition in chamber, described image acquisition region is positioned at the photosensitive path of described photo-sensitive cell；
Wherein when a placing object is in described image acquisition region, the light that described light source produces is being radiated to Being reflected by the surface of described object after stating object, the light reflected by the surface of described object is through described light hole Enter described dark chamber and accepted by the photosurface of described photo-sensitive cell further, thus described optical imaging device is adopted The image of collection object.
35. optical imaging devices as claimed in claim 34, wherein said light hole is corresponding to described photosensitive The center of the photosurface of element.
36. optical imaging devices as claimed in claim 34, also include a housing, and wherein said housing has Having described dark chamber and described light hole, described photo-sensitive cell is housed inside described housing, and described light source neighboringly sets It is placed in described housing.
37. optical imaging devices as claimed in claim 34, also include a housing and a substrate, Qi Zhongsuo State housing and be arranged at described substrate, to form described dark chamber, described light source between described housing and described substrate Neighboringly it is arranged at described housing.
38. optical imaging device as claimed in claim 37, also include a wiring board, wherein said photosensitive Component mounter is mounted on described substrate in described wiring board, described wiring board.
39. optical imaging devices as claimed in claim 37, also include a wiring board, wherein said photosensitive Component mounter is in described wiring board, and described substrate has a receptive cavity, and described wiring board is housed inside described acceptance Chamber.
40. optical imaging device as claimed in claim 37, also include a wiring board, wherein said photosensitive Element and described wiring board are mounted on the not homonymy of described substrate respectively, and described photo-sensitive cell is electrically connected to institute State wiring board.
41. optical imaging devices as claimed in claim 39, wherein said housing includes a upper housing part and extremely Few shell portion, side, every described side casing parts edge from described upper housing part the most deviously extends to described substrate, from And in described upper housing part, form described dark chamber between every shell portion, described side and described substrate.
42. optical imaging devices as claimed in claim 34, also include a housing and a wiring board, described Housing is arranged at described wiring board, to form described dark chamber, described sense between described housing and described wiring board Optical element is mounted on described wiring board.
43. optical imaging devices as claimed in claim 42, wherein said housing includes a upper housing part and extremely Few shell portion, side, every described side casing parts edge from described upper housing part the most deviously extends to described wiring board, Thus in described upper housing part, form described dark chamber between every shell portion, described side and described wiring board.
44. optical imaging devices as claimed in claim 34, also include a housing, a substrate and a support Element, wherein said support component is arranged at described substrate, and the surrounding of described housing extends respectively to described support Element, thus between described substrate, described support component and described housing, form described dark chamber, described housing There is described light hole to be communicated in the external environment condition in described dark chamber and described dark chamber.
45. optical imaging device as claimed in claim 44, also include a wiring board, wherein said photosensitive Component mounter is mounted on described substrate in described wiring board, described wiring board.
46. optical imaging devices as claimed in claim 44, also include a wiring board, wherein said photosensitive Component mounter is in described wiring board, and described substrate has a receptive cavity, and described wiring board is housed inside described acceptance Chamber.
47. optical imaging devices as claimed in claim 44, also include a wiring board, wherein said photosensitive Element and described wiring board are mounted on the not homonymy of described substrate respectively, and described photo-sensitive cell is electrically connected to institute State wiring board.
48. optical imaging devices as claimed in claim 34, also include a housing, a wiring board and one Support element, wherein said support component is arranged at described wiring board, and the surrounding of described housing extends respectively to described Support component, thus between described support component, described wiring board and described housing, form described dark chamber, institute Stating photo-sensitive cell and be mounted on described wiring board, described housing has described light hole to be communicated in described dark chamber and institute State the external environment condition in dark chamber.
In 49. such as claim 36 to 48 arbitrary as described in optical imaging device, also include a load-carrying unit, Wherein said load-carrying unit is positioned apart from described housing, and the sidepiece of described load-carrying unit forms described figure As pickup area.
50. optical imaging devices as claimed in claim 49, the photosurface place of wherein said photo-sensitive cell Plane parallel with the plane at described load-carrying unit place.
51. 1 kinds of electronic equipments, it is characterised in that include an optical imaging device, wherein said optical imagery Device includes a photo-sensitive cell and a light source, and described optical imaging device has an image acquisition region, a dark chamber And a light hole；Wherein said light hole is communicated in described dark chamber and the external environment condition in described dark chamber, described sense Optical element is positioned at described dark chamber, and described light hole is corresponding to the photosurface of described photo-sensitive cell, described light source Being positioned at the external environment condition in described dark chamber, described image acquisition region is positioned at the photosensitive path of described photo-sensitive cell.
52. electronic equipments as claimed in claim 51, wherein said optical imaging device is for gathering user Biological characteristic；Wherein when the position of the collected image of user is placed in described image acquisition region, institute State the light of light source generation behind the position being radiated to described collected image, by the position of described collected image Reflection, the light after being reflected by the position of described collected image enters described dark chamber through described light hole and goes forward side by side One step is accepted by the photosurface of described photo-sensitive cell, thus described optical imaging device gathers the biological special of user Levy.
53. electronic equipments as claimed in claim 52, the type of wherein said biological characteristic selected from fingerprint, Palmmprint and the type group of foot stricture of vagina composition.
In 54. such as claim 51 to 53 arbitrary as described in electronic equipment, wherein said electronic equipment be all one's life Thing collection apparatus device, and described electronic equipment also includes that an attachment means, described optical imaging device can be led to Being connected to described attachment means, described attachment means is suitable to be communicatively coupled with an electrical equipment letter.
In 55. such as claim 51 to 53 arbitrary as described in electronic equipment, wherein said electronic equipment is a shifting Galvanic electricity subset, and described electronic equipment also includes an apparatus body, and described optical imaging device is communicably It is connected to described apparatus body；The described biological characteristic of the user of wherein said optical imaging device collection is passed Transport to described apparatus body, to compare with the biological characteristic being pre-stored in described apparatus body, if the match is successful, The most described apparatus body thinks that the user identity of collected described biological characteristic is legal, if it fails to match, then and institute State apparatus body and think that the user identity of collected described biological characteristic is illegal.
56. electronic equipments as claimed in claim 55, wherein said apparatus body includes a button, described Optical imaging device is arranged at described apparatus body, and described button forms described image acquisition region.
57. electronic equipments as claimed in claim 55, wherein said apparatus body includes a display screen, Described optical imaging device is arranged at described apparatus body, and described display screen forms described image acquisition areas Territory.
58. electronic equipments as claimed in claim 55, the type of wherein said electronic equipment selected from mobile phone, Panel computer, notebook computer, electricity paper book and the type group of personal digital assistant composition.
In 59. such as claim 51 to 53 arbitrary as described in electronic equipment, wherein said electronic equipment is one Access control system or safety cabinet safety lock；Wherein said electronic equipment includes an apparatus body, and described optical imagery fills Put and be communicatively coupled with described apparatus body；The described life of the user that wherein said optical imaging device gathers Thing feature is transferred to described apparatus body, to compare with the biological characteristic being pre-stored in described apparatus body, If the match is successful, the most described apparatus body thinks that the user identity of collected described biological characteristic is legal, if Joining unsuccessfully, the most described apparatus body thinks that the user identity of collected described biological characteristic is illegal.
60. electronic equipments as claimed in claim 59, wherein said apparatus body includes a processor and Lock body, described optical imaging device is communicatively coupled with described processor, and described processor is operably connected In described lock body, and described processor is controlled the state of described lock body.
In 61. such as claim 51 to 53 arbitrary as described in electronic equipment, wherein said electronic equipment is one Pay terminal, pay for statement.
In 62. such as claim 51 to 53 arbitrary as described in electronic equipment, wherein said electronic equipment is one fast Pass terminal, sign for for quick despatch.
In 63. such as claim 51 to 53 arbitrary as described in electronic equipment, in wherein said electronic equipment is one Sight glass；Wherein said electronic equipment includes that an apparatus body, described optical imaging device are communicatively coupled with institute State apparatus body, and described optical imaging device is arranged at described apparatus body, so that described apparatus body shape Become described image acquisition region.
64. 1 kinds of optical imaging devices, it is characterised in that described optical imaging device includes a photo-sensitive cell, Described optical imaging device has an image acquisition region, dark chamber and a light hole；Wherein said photosensitive unit Part is arranged at described dark chamber, and described light hole is communicated in the external environment condition in described dark chamber and described dark chamber, and institute Stating the light hole photosurface corresponding to described photo-sensitive cell, described image acquisition region is positioned at described photo-sensitive cell Photosensitive path；
Wherein set the imaging thing range parameter of described optical imaging device as F, set described optical imaging device The aperture parameters of described light hole be Φ, set the image distance parameter of described optical imaging device as X, set institute The object distance parameter stating optical imaging device is W；The imaging thing scope of wherein said optical imaging device is with described The relation of the aperture of optical imaging device, object distance and image distance meets function expression: F=Φ (W/X+1).
65. optical imaging devices as described in claim 64, wherein set the thing of described optical imaging device High parameter is U, sets the image height parameter of described optical imaging device as V；Wherein said optical imaging device The relation of thing height, aperture, object distance and the image distance of image height and described optical imaging device meets function expression: V=[UX+ Φ (W+X)]/W.
66. optical imaging devices as described in claim 65, also include that a light source, described light source are positioned at institute Stating the external environment condition in dark chamber, wherein when a placing object is in described image acquisition region, described light source produces Light is reflected by the surface of described object after being radiated to described object, the light reflected by the surface of described object Enter described dark chamber through described light hole and received by the photosurface of described photo-sensitive cell further, thus described Optical imaging device gathers the image of object.
67. optical imaging devices as described in claim 66, wherein said light hole is corresponding to described photosensitive The center of the photosurface of element
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Application publication date: 20161207