CN104105991A - Optical objective having five lenses with front focusing - Google Patents

Optical objective having five lenses with front focusing Download PDF

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Publication number
CN104105991A
CN104105991A CN201280064307.7A CN201280064307A CN104105991A CN 104105991 A CN104105991 A CN 104105991A CN 201280064307 A CN201280064307 A CN 201280064307A CN 104105991 A CN104105991 A CN 104105991A
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China
Prior art keywords
lens
optical
coefficient
group
optical imaging
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Granted
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CN201280064307.7A
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CN104105991B (en
Inventor
S·卡霍尔
J·施密特
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DigitalOptics Corp MEMS
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DigitalOptics Corp MEMS
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses

Abstract

Optical system comprising five lenses, a front pupil and achieving focus for objects from close to infinity by adjusting, via a MEMS actuator, the position of a subset of lenses located on the object-side of the optical system. The most object-side, biconvex, lens provides a substantial amount of the system's optical power for achieving focus from an object as close as 10 cm away from the aperture stop.

Description

There is the Liar of the lens of five attached forward directions focusing
The mutual reference of related application
The application's case is advocated to propose on October 24th, 2011, name is called " optical system with microelectromechanical system image focus actuator (with the optical system of MEMS (micro electro mechanical system) image focus actuator) ", the 61/550th, the interests of No. 789 U.S. Provisional Patent Application cases.The full content merging of above-mentioned application case is incorporated in herein.
Technical field
Be below about image optics device substantially, and more espespecially with the small-sized optical lens system of MEMS (micro electro mechanical system) (MEMS) actuator, be for focusing optical lens combination.
Background technology
The progress of collocation Optical manufacture technology, optical device and optical devices are existing to be widely applied.In an optical technology interesting progress be lenticule and other optical modules centimetre micron or less rank aspect manufacture.Compared to tradition centimetre or the optical element of large level more, micro-optical device has made optical system than traditional telescope, and microscope, camera etc. more can be with compatible compared with dingus.
Wafer scale optical device is a kind of mechanism that contributes to manufacture micro-optical device.Wafer scale optical device is that one can be used similar semiconductor fabrication, the manufacturing technology of design and manufacture optical module.The general available different size class (for example centimetre, micron etc.) of this technology is carried out convergent-divergent.And wafer scale optical device can manufacture order element and multicomponent optical texture, the lens element that produces fine registration stacks.The net result of wafer scale optical device provide there is cost benefit, the optical module of miniaturization, it can reduce the form factor of optical system.These optical systems can be widely used in small-sized or mini device, comprise camera module that mobile phone uses, watch-dog, mini video camera etc.
Although wafer scale optical device is a kind of more recent technology that compact optical assembly is used of manufacturing, some traditional manufacturing technologies are still equally applicable to compact sized optical manufacture.For example, the plastic cement manufacturing technology including ejection formation etc. can be used for manufacturing compact sized optical assembly.In addition, glass manufacture technology has been applicable to provide for small device sizes the miniaturization optical module of high-quality optical surface.
Except optical element, the miniaturization of numerical digit imaging sensor has also contributed to continue to dwindle image capture and record device.The improvement of image sensor, the cost that has utilized microscale entity animation and high signal that noise is compared and declined gradually, provides high-resolution image detector.The acquisition of small-sized, more not expensive numerical digit and record device, collocation is as the micro-optical device of wafer scale optical module and so on, and its function is comparable to or exceeds use traditional optical device more expensive but camera system that quality is very high before 10 years.Although the quality of modern micro-optic device is very high, the zoom capabilities of mini optical system remains restriction.The introduction of numerical digit convergent-divergent is a solution, and it sacrifices Optical Resolution with magnified image.For high-res sensor, this is generally the suitable replacement scheme of traditional visualization zoom capabilities.But, the advantage that visualization convergent-divergent provides numerical digit convergent-divergent not reach.
For example, the inventor of the technical theme that discloses suggestion wishes a kind of mini optical system of attached automatic focusing function.Separately wish this kind and reach the optical system of nearly Jiao (close focus).
Summary of the invention
The simplification summary of one or more aspect is below described, to these aspects are had to basic understanding.This summary is not all imagined the thorough summary of aspect, and its purpose does not lie in the important or key element of differentiating all aspects or the scope of describing arbitrary or whole aspects yet.Its sole purpose is to illustrate in simplified form some concepts of one or more aspect, as the introduction being hereinafter described in more detail.
The particular aspect that this theme discloses provides a kind of miniaturization optical system.In some aspects, miniaturization optical system can comprise ejection formation optical system.In more another aspects, miniaturization optical system can be the autofocus optical system containing five optical modules.In other aspects again, miniaturization optical system can be uses MEMS (micro electro mechanical system) (MEMS) actuator, the autofocus optical system focusing on to reach optical system.
In one or more other aspects that disclose at this theme, provide a kind of MEMS of utilization actuator to reach nearly Jiao's optical system.In this aspect, nearly Jiao can comprise the object distance of 10cm in fact.In addition, according to other aspects, can, by the position of adjusting optical module subset in optical system, optical system configurations be become to be used for reaching nearly Jiao and parallel focusing (infinity focus).In particular aspect, optical module subset can comprise the single optical module in optical system.In this aspect at least, this single optical module can be the optical axis along optical system, approaches the lens (being called thing side lens) of optical system imaging object most.This (etc.) in aspect, MEMS actuator can be configured to for the thing side lens of optical system are shifted with the first distance (this first distance is configured to for the object of infinite point is focused in the image sensor being associated with optical system), and with second distance displacement thing side lens, this second distance is configured to focus in image sensor for thing nearly (for example,, in fact from the object at thing side lens 10cm place).
The aspect other according to one or more, can be configured to the disclosed autofocus optical system of this paper for comprising aperture diaphragm.In particular aspect, autofocus optical system can comprise ejection formation plastic cement lens, and in other aspects, and autofocus optical system can comprise wafer scale optical lens, glass lens or it is appropriately combined.In another aspect, aperture diaphragm can be placed in to the thing side of optical system thing side lens.In an atypical aspect, MEMS actuator can be configured to for the optical module subset of moving optical system, to focus on object, still to make aperture diaphragm remain on fixed position along the optical axis of optical system simultaneously.In another atypical aspect, MEMS actuator can be configured on the contrary for respect to optical axis, double optical module subset and the aperture diaphragm of moving, to focus on object.
According to other aspects again, disclosed is a kind of autofocus optical system that comprises multiple optical modules.These multiple optical modules, in some these aspects, can comprise the thing side lens that optical system provided to a large amount of optics multiplying powers.In this aspect at least, thing side lens can comprise in fact 1/2nd or be greater than 1/2nd optical system combined focal length.In another aspect, thing side lens can comprise in fact 3/4ths or above optical system combined focal length.In a particular aspect, MEMS actuator system is connected to thing side lens, and is to be configured to for thing side lens being shifted with the first distance (being the object being configured to for focusing on infinite point) and with second distance (being to be configured to for focusing on the object near optical system).According to a certain specific embodiments, the ratio of the thing side focal length of lens and optical system combined focal length, can be the function with second distance difference along system optical axis the first distance.
According to more another aspects, this theme discloses provides the micro-optical systems that comprises five optical lenses.In this aspect, the object lens of these five optical lenses can be configured to the positive diopter for supplying all these five optical lenses.In this aspect, four remaining lens have the clean negative diopter of combination.In at least one particular aspect, these four remaining lens respectively have negative diopter, with the clean negative diopter of combination.According to atypical or other aspect, the 3rd lens in these five optical lenses can have Ji Aoxiang side, protruding thing side.As shown in another abnormal type or other aspect, the spacing in these five optical lenses between the 4th and the 5th, can be maximum spacing between the lens of optical system.In another aspect, micro-optical systems can be autofocus system, and five optical lens subsets wherein can move along optical axis, to improve the focusing of optical system.In a particular aspect, the subset of these five optical lenses can comprise object lens, and this subset can move by MEMS actuator.
In the other aspect disclosing at this theme, provide a kind of micro-optical systems that comprises five optical lenses.These five optical lenses can be arranged to multiple lens combination, and each lens combination comprises respectively the subset of these five optical lenses.Each group all comprises the lenticular spacing that is equal to or less than distance between this multiple optics group.In another aspect, at least one each interior lens of the plurality of lens combination comprise at least one optical surface, and it has concave surface position and convex surface position concurrently.In particular aspect, micro-optical systems, along the optical axis of first lens in these five optical lenses, is responded position and is changed and change effective focal length, and in atypical or other aspect, micro-optical systems is along the optical axis of first lens, responds that position is changed and essence maintains identical back focal length.
In order to address relevant object before reaching, one or more aspect comprises hereinafter described, complete description and the feature that particularly points out in claims.Beneath explanation and accompanying drawing propose some descriptive aspect of one or more aspect in detail.But these aspects belong to the small part of only pointing out in variety of way, wherein, the principle of each aspect can be used, and described aspect is with being intended to comprise all these a little aspects and impartial part thereof.
Brief description of the drawings
Each aspect that Fig. 1 discloses according to this theme, describes the diagram that is configured to the illustration optical imaging system example for focusing on nearlyer thing.
Fig. 2, according to the aspect of other exposure, describes the diagram that is configured to the example optical imaging system for focusing on essence infinite point object.
Fig. 3 describes the diagram containing the illustration optical imaging system of multiple ejection formation optical modules.
Fig. 4, for the example optical imaging system that nearlyer thing is focused on, describes the diagram that illustrates filed curvature and distortion line chart.
Fig. 5, for Fig. 4 example optical imaging system that essence infinite point object is focused on, describes the diagram that illustrates filed curvature and distortion line chart.
Fig. 6, according to other aspect, for the illustration optical imaging system that nearlyer thing is focused on, describes the diagram of example lateral chromatic aberration figure.
Fig. 7, according to other aspects, for the illustration optical imaging system that essence infinite point object is focused on, describes the diagram of lateral chromatic aberration figure.
Fig. 8 focuses on object for exposure the optical imaging system at 10cm place, describes the diagram of lateral light fan figure.
Fig. 9 focuses on object essence for exposure the optical imaging system of infinite point, describes the diagram of lateral light fan figure.
The aspect that Figure 10 discloses according to this theme, describes the cross section that is used for the example optical system that 10cm place object image is focused on.
The aspect that Figure 11 discloses according to this theme, describes the cross section that is used for the example optical system that infinite point object image is focused on.
The aspect that Figure 12 discloses according to this theme, for the object at 10cm place, describes the illustration line chart of filed curvature and distortion.
Infinite point object in other aspects that Figure 13 discloses for this theme, the illustration line chart of description filed curvature and distortion.
Figure 14, according to aspect, for the object at 10cm place, describes the illustration line chart of main lateral chromatic aberration.
Figure 15, according to one or more other aspects, for the object of infinite point, describes the illustration line chart of main lateral chromatic aberration.
Figure 16, according to other aspects again, for the object at 10cm place, describes the illustration lateral light fan figure of each image height.
Figure 17, according at least one other aspects, for the object of infinite point, describes the illustration lateral light fan figure of each image height.
Figure 18, according to the aspect of other exposure, for illustrating micro-optical systems, describes the lateral light fan figure of field angle scope.
Figure 19 describes the example figure containing micro-optical systems shown in Figure 18 of lens and optical surface.
The object that Figure 20 assembles for micro-optical systems shown in Figure 18, the illustration line chart of description filed curvature and distortion.
Figure 21, for 0.90 centimetre of pupil radius in an aspect, describes the example line chart of longitudinal aberration.
Figure 22, according to other aspect, for disclosed micro-optical system, describes the illustration line chart of lateral chromatic aberration.
Figure 23, according to disclosed aspect, for the micro-optical systems focusing near field, describes the lateral light fan figure of field angle scope.
Figure 24 describes the example figure containing micro-optical systems shown in Figure 23 of lens and optical surface.
The near field object that Figure 25 assembles for micro-optical systems shown in Figure 23, the illustration figure of description filed curvature and distortion.
0.90 centimetre of pupil radius that Figure 26 uses for the micro-optical systems that discloses in an aspect, the example line chart of description longitudinal aberration.
Figure 27, according to the aspect of other exposure again, for disclosed micro-optical systems, describes the illustration figure of lateral chromatic aberration.
Figure 28 A, 28B, 28C and 28D describe according to aspect in addition and focus on the diagram of illustration micro-optical systems of infinite point and relevant optical performance figure.
Figure 29 A, 29B, 29C and 29D describe micro-optical systems and relevant optical performance figure shown in the Figure 28 focusing near field.
Embodiment
Referring now to graphic explanation be each aspect, the reference numeral that wherein matches system is used in reference to the element matching in full.In explanation down below, in order to explain, many specific detail are proposed in detail, to well understand one or more aspect.But, will be apparent that, without these specific detail can put into practice this (etc.) aspect.In other examples, well-known construction and device is to represent with calcspar, to assist one or more aspect of explanation.
In addition, should it is evident that, available form miscellaneous embodies guidance herein, and ad hoc structure as herein described or function only belong to and expressing the meaning.Based on guidance herein, it will be understood by one of ordinary skill in the art that, disclosed aspect can be independent of other aspects and be achieved, and can combine in various manners two or many persons of these aspects.For example, can use any amount of aspect of carrying herein to realize equipment and/or hands-on approach.In addition, except or be different from one or many person of the aspect of carrying herein, also can use other structures to realize equipment and/or hands-on approach.As an embodiment, in disclosed equipment and lens combination, there are many systems to give being explained in arranging via small-sized fixed position optical lens the content that high-res optical imagery is provided herein.It will be understood by one of ordinary skill in the art that, similar techniques can be applied to other optical lens frameworks.For example, lens layout used herein can be used in mechanical type focusing or autofocus system, and whereby, optical arrangement system is shifted with respect to image plane automatic or manual.
In at least one aspect disclosing at this theme, provide a kind of optical imaging system.Optical imaging system can comprise first group of lens and second group of lens.Can, by the optical axis along optical imaging system, with respect to second group of lens, reorientate first group of lens, optical imaging system is assembled.In at least one aspect disclosing at this theme, second group of lens comprises the image sensor for optical imaging system.In the particular aspect disclosing at this theme, first group of lens can comprise single lens.For example, single lens can comprise thing side lens, and it is the optical element near optical imaging system thing side.
Now refer to graphicly, the aspect that Fig. 1 discloses according to this theme is described the calcspar of exemplary optical systems 100.System 100 comprises crosscut optical axis 104 and the layout of the optical element 102 put.As the user of this paper institute, optical element refers to that for example, electromagnetic radiation to dropping at least partly in visible spectrum (, comprising the wavelength of approximately 400 to 700 nanometers [nm]) is transparent at least partly single-piece refraction or reflecting material.The embodiment of suitable material comprises frosted and polished glass, molded glass or by repeating into glass, wafer scale optical device (WLO), ejection formation plastics that mold process is shaped, forming on optical element through etched micro-optical device or like that.In addition, optical element will have at least one refraction or reflecting surface.A kind of embodiment of the optical element that utilizes is optical lens herein.Optical lens is a kind of optical element, and it comprises the edge of two relative planes of refraction and between described apparent surface, the external diameter (for round lens) of described fringe enclosing lens or the edge thickness of girth and lens.The exemplary configurations of optical lens comprises the lens 102 of a succession of one axle of crosscut at least substantially (optical axis 104).But, will be appreciated that, can exist to disclose consistent other with this theme and may arrange.One " lens subassembly " is to be defined as (A) single lens element herein, itself and any adjacent lens element separate, to such an extent as to cannot ignore spacing when image and form the characteristic of lens element separately calculating, or (B) two or more have the lens element on adjacent lens surface, described adjacent lens surface is complete entirety contact or adjacent to each other all little of ignoring spacing in the time calculating image to any spacing between between adjacent lens surface, and forms the characteristic of these two or more lens elements.Therefore, some lens elements also can be lens subassembly, and word Hui " lens element " and " lens subassembly " are not mutual exclusion word Hui.In addition, will be appreciated that, word Hui " optical module " is used in reference to have with imaging optical system to close about the superset of the project of key property, and comprise as the optical element of lens element and lens subassembly and so on and include but not limited to the various optics stopping devices of aperture diaphragm, but also can comprise various sundry items, as film, bandpass filter, low pass or high-pass filter, polarizing filter, minute surface etc.
Enter the light of optical element 102 left sides, thing side, can be in proper order and element (102) reciprocation separately, and leave right side or the picture side of element 102 towards optical sensor 106.Will be appreciated that, the not all and optical element 102 interactive light in left side all will be sent to sensor 106; Some light can be by element (102) reflection separately, and some light can deviate from optical axis 104 scatterings and suffer to absorb (for example, being absorbed by not shown optics stopping device) etc.But generally speaking, optical element 102 will receive for example, light from element one side (left side) object, and for example, form the real image of object at element opposite side (right side).Real image will be along optical axis 104, is formed at from optical element 102 specified distance, and this is called image distance (ID).It should be noted that ID depends primarily on the diopter (or optics multiplying power) of corresponding object distance (OD – is the distance between object and optical element 102 along optical axis 104) and combined optical element 102.
Sensor 106 can be a kind of for example, digital apparatus containing photo switches, photo sensors or pixel multi-dimension array (two-dimensional array).The embodiment of this device can comprise photoelectronic coupler (CCD) array, or complementary metal oxide semiconductor (CMOS) array or some other suitable optical sensor arrays.Each photo switches, photo sensors of this array or pixel are to be configured to for output electrical signals when the irradiation.Moreover the magnitude of current of electric signal is directly related with the energy density of irradiation pixel.Therefore, collect output current position standard by each pixel from array, sensor 106 can reappear according to numerical digit mode the two-dimensional radiation energy pattern (radiant energy pattern) of irradiation sensor 106.In addition, be placed in above-mentioned ID in pixel surface or the sensor plane of sensor 106, the two-dimensional radiation energy pattern producing is the two-dimensional radiation energy pattern of the optical element 102 true optical image that produces.Therefore, sensor 106 can be used to reappear that image according to numerical digit mode.The resolution of sensor 106 digital image that produces, depends on the some pixels in sensor 106 active arrays.In addition, optical system 100 can comprise cover plate 108 between optical element 102 and image sensor 106, as shown in Figure 1.
As shown in optical system 100, optical element 102 can comprise five optical lenses, comprises lens L1, lens L2, lens L3, lens L4 and lens L5 from the thing side of optical element 102 to optical element 102 as side.As shown in the figure, lens L1 is a kind of lenticular lens with positive optics multiplying power, has convex surface thing side and convex surface as side surface, is respectively R1 and R2.In addition, with respect to lens L2, L3, L4 and L5, lens L1 can have stronger positive optics multiplying power.In at least one aspect, with respect to the combination of lens L2, L3, L4 and L5, lens L1 can have stronger positive optics multiplying power.In a particular aspect, the available combined focal length of lens L1 be optical element 102 at least about 1/2nd or larger value.In atypical aspect, the available combined focal length of lens L1 essence be optical element 102 at least about 3/4ths or larger value.In related aspect, the optics multiplying power (L1 of thing side lens power) can be combination optical multiplying power (for example, the L1 of about 1.25x optical element 102 power≤ 1.25* (L1 power+ L2 power+ L3 power+ L4 power+ L5 power)).In a particular aspect, aperture diaphragm A1 can be placed in the Huo Qi front, position of lens L1 thing side.To carefully state aperture diaphragm A1 below.
Lens L2 can have the negative optics multiplying power of entirety.In addition, lens L2, in an aspect, can have nick thing side R3.In atypical aspect, that thing side R3 can be is smooth, without optics multiplying power.As shown in another atypical aspect, thing side R3 can dimpling.Lens L2 can have concave curvature as side.And, lens L2 can be configured to for providing chromatic aberration correction for optical system 100.In at least one aspect, lens L2 can be optical system 100 most of chromatic aberration correction is provided.
Lens L3 inclusion side R5Ji Xiang side R6.Thing side R5 can nick in particular aspect.And R6 can be convex surface as side.In a particular aspect, lens L3 can have positive optics multiplying power.
Lens L4 inclusion side R7Ji Xiang side R8.Thing side R7 can have convex curvature near optical axis 104.And, disclosing at least one aspect at this theme, thing side R7 can further change into concave surface from optical axis 104.And, can be in fact smoothly as side R8, near optical axis 104, there is a little or there is no optics multiplying power, and deviating from optical axis 104 and change into convex curvature.In atypical aspect, near optical axis 104, can be convex surface as side R8, in low field angle have significant optics multiplying power, and deviate from optical axis 104 for convex surface.In a particular aspect, lens L4 for example, can have positive focal power for low field angle (, between zero with the field angle of approximately 12 to 15 degree).In another aspect, lens L4 for example, can have the optics multiplying power of little just, little negative or essence zero for middle field angle (, the field angle between approximately 12 to 15 degree and approximately 22 to 25 degree).In another aspect again, lens L4 for example, can have the optics multiplying power of little just, little negative or essence zero for high field angle (, to the field angle between the higher number of degrees, accepting field angle up to optical system 100 maximums between approximately 22 to 25 degree and approximately 33).
Lens L5 inclusion side R9Ji Xiang side R10.Thing side R9 can have concave curvature for low and middle field angle.In at least one aspect, thing side R9 can change into nick for high field angle or without curvature.Near optical axis 104, can be concave surface as side R10.And, as side R10 in and high field angle can change into convex surface from concave surface, as shown in the figure.
As shown in the figure, optical element 102 can for example, in the space (, air gap) having between lens L1, L2, L3, L4 and L5 separately separately.In at least one disclosed specific embodiment, compared to distance on the 3rd axle between lens L3 and lens L4, on the first axle between lens L1 and L2, distance is can essence less.In another specific embodiment, compared to distance on the second axle between between lens L2 and L3, on the 4th axle between lens L4 and L5 distance, also have distance on the 3rd axle in addition, on the first axle, distance is can essence less.In at least one specific embodiment, on second, third and the 4th axle distance at least just with the first axle on distance comparatively speaking, can essence aspect big or small similar.In other specific embodiments, between first, second, third and the 4th distance on axle, not necessarily to there are these relevances.For example, between first, second, third and the 4th distance on axle, can there is relation on the contrary.
In at least one aspect disclosing at this theme, at least MEMS actuator can be connected to lens L1.Can MEMS actuator be configured to for again putting lens L1, to focus on the object at different object distances place along optical axis 104.As shown in an embodiment, variable the first distance between lens L1 and lens L2 of MEMS actuator, to focus on the object at different object distance place.In at least one aspect, MEMS actuator can be seated in lens L1 apart from lens L2D 10cm110 places, focus on sensor 106 with the image that aperture diaphragm A1 position on optical axis 104 10 centimeters (cm) located to object.
According to other aspect, can aperture diaphragm A1 be fixed with respect to optical axis 104.In another aspect, can be with respect to the position constant aperture diaphragm A1 of lens L1.In aspect after, can, in the time focusing on object image, together with lens L1, move aperture diaphragm A1 by MEMS actuator.According to other aspects again, can be separately or together with aperture diaphragm A1, MEMS actuator is configured to for along the total distance of optical axis 104 mobile lens L1 mono-.In a particular aspect, this total distance can focus in its one end the image of infinite point object, and focuses on the image of essence from aperture diaphragm A110cm place object in its other end.As the user of this paper institute, the object of infinite point comprises that to meet flat axle known to optical imagery sciemtifec and technical sphere approximate.General speech it, flat axle is approximate is the object that makes the distance that one jiao of essence is zero degree about position place, the first light ray that this jiao of subtend (subtending) is parallel with optical axis 104 and one second light ray, described the second light ray arises from from the optical axis point position on object and by optical axis 104 farthest.In another aspect again, it is the focal length of the big or small function of total distance at least partly that lens L1 can have it.In other aspects again, the ratio of the combined focal length of the focal length of lens L1 and optical element 102, can be the big or small function of total distance at least partly.
Because making real image, reappears in electronics mode the pel array of sensor 106, the data being produced by sensor 106 (and other herein disclosed sensor) with electrical signal form can be stored to memory body, be projected to for example, for the display of inspecting (, numerical digit display screens), with software editor etc.Therefore, at least one application of optical system 100 is to coordinate the digital still camera or the video camera that show containing numerical digit.Moreover optical system 100 and other include the optical system in this theme discloses, and can be achieved together with the camera module of electronic installation.This electronic installation can comprise a large amount of consumer, commercialization or industrial device.Embodiment comprises containing the electronic equipment of mobile phone, Smartphone, kneetop computer, relaxed pen electricity, PDA, computer screen, televisor, flat panel TV etc., (for example contains business machine, ATM camera, teller's window camera, convenience store camera, warehouse camera etc.), personal monitoring and control equipment (for example, pen type camera, glasses type camera, button type camera etc.) or monitoring or the surveillance equipment of industrial watch-dog (for example, airport camera, freight yard camera, rail yard camera etc.).For example, in consumer electronics device, because can comprising, optical system 100 there is the optical module of several centimetres or less grade entity size and because at least some optical elements 102 can have fixed position, therefore system 100 and other disclosed systems are applicable to various mini or micro-camera module very much.But, be appreciated that, disclosed system is not limited to this application-specific; On the contrary, those skilled in the art is known or see through other application that content is learnt herein, includes in the scope disclosing at this theme.
Fig. 2 discloses other aspect according to this theme, describes the diagram that illustrates optical imaging system 200.Optical imaging system 200 can comprise the optical element 202 that one group of crosscut optical axis 204 is arranged.Moreover, optical element 202 can be configured on the image plane 206 for image being focused on to an object, this object essence is placed in the aperture diaphragm A1 infinite point from optical imaging system 200.In at least one aspect, optical element 202 can essence be similar to the optical element 102 of Fig. 1, and as mentioned above, difference is in the first distance between lens L1 and lens L2.Specifically, this first distance can be and is configured to the distance B that the object for essence being placed in to above-mentioned infinite point focuses in optical imaging system 200 iNFINITY210.Moreover as shown in Figure 1, as mentioned above, aperture diaphragm A1 can be fixed on appropriate location with respect to optical axis 204 in an aspect.In atypical aspect, aperture diaphragm A1 can be fixed on appropriate location and along with lens L2 moves along optical axis 204 with respect to lens L1.
Will be appreciated that, optical element 102 can have different shapes from the surperficial R1 to R10 (and this theme discloses other described in full optical surfaces) of 202 lens L1 to L5.In an aspect, one or more surface can be sphere.In other aspects, one or more surface can be conical surface.In other aspects again, one or more surface can be aspheric surface according to suitable aspherical equation formula, as even aspherical equation formula:
( 1 ) - - - z = [ CY 2 { 1 + ( 1 - ( 1 + K ) C 2 Y 2 ) 1 / 2 } ] + Σ i ( A i * Y i ) , Wherein z is the radial distance Y place to aspheric surface summit tangent plane by optical axis, on aspheric surface shape lens surface, one lights the vertical height (sag height) (unit is mm) of the setting-out of painting, C is the curvature of aspheric surface shape lens surface on optical axis, Y has been the radial distance (unit is mm) from optical axis, K is conic constant, and A ibe i asphericity coefficient, summation item number is even number i.But these aspects are not inferred as the scope that this theme discloses that limits.On the contrary, each surface can be grotesque aspheric surface shape or be the aspherical equation formula that contains even number and odd coefficients.
Continue above-mentioned, will be appreciated that, the lens (and the optical lens of various other optical systems that provide is in full provided this theme) of optical element 102 and 202 can be made up of all kinds of suitable transparent materials, and are formed according to the various proper procedures for generation of optical quality surface.In an aspect, lens L1 to L5 can be frosted and polished glass, and its refractive index of the glass of wherein selecting makes compound lens L1 to L5 produce desirable effective focal length.In another aspect, lens can be the ejection formation plastics plastics of optical quality that another kind of proper method forms (or by) of optical quality, and wherein plastics have the refractive index that is applicable to provide desirable effective focal length.In at least one other aspects, lens L1 to L5 can for example, by (being similar to etched semiconductor wafer, solid state memory wafer, data are processed wafer) photoetching etch process, give etching self-induced transparency glass, crystallization or other appropriate configuration (for example, two oxygen silicon – SiO 2wafer).In a particular aspect, can be according to beneath table 1 optical prescription (prescription) to 9, optical element 102 and optical element 202 are described.
Parameter declaration Numerical value
Effective focal length (in air, under system temperature and pressure) 4.131396
Effective focal length (image space) 4.131396
Back focal length 0.349633
Total track lenth (TTL) 5.49089
Image space F/# 2.293412
Flat axle work F/# 2.44
Work F/# 2.857105
Image space NA 0.1752143
Object space NA 0.008991
Diaphragm radius 0.90071
Flat axle image height 2.956
Flat axle multiplying power -0.04388
Entrance pupil diameter 1.801419
Entrance pupil position 0.18
Emergent pupil diameter 1.236574
Emergent pupil position -3.03634
Maximum radial field 2.956
Lens unit Centimetre (mm)
Angular magnification 1.183246
Table 1: general optical characteristics
Image field # X value Y value Flexible strategy
1 0 0 1
2 0 0.571 1
3 0 1.142 1
4 0 1.714 1
5 0 2.285 1
6 0 2.57 1
7 0 2.856 0.2
8 0 2.956 0.2
Table 2: image field type is to real image height (unit is mm)
Image field/# VDX VDY VCX VCY VAN
1 0 0 0 0 0
2 0 0 0 0 0
3 0 0 0 0 0
4 0 0 0 0 0
5 0 -0.04364 0.000234 0.043642 0
6 0 -0.081 0.001432 0.081006 0
7 0 -0.1227 0.004184 0.122713 0
8 0 -0.13916 0.006035 0.139171 0
Table 3: the vignetting factor of table 2 image field
Wavelength # Numerical value (unit be μ m) Flexible strategy
1 0.47 91
2 0.51 503
3 0.555 1000
4 0.61 503
5 0.65 107
Table 4: for the wavelength of ray tracing
Table 5: surperficial data summary
Surface Parameter declaration Numerical value
R1 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.01328
? About the coefficient of r6 0.020358
? About the coefficient of r8 -0.03418
? About the coefficient of r10 0.012665
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R2 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.0043
? About the coefficient of r6 0.001395
? About the coefficient of r8 -0.02717
? About the coefficient of r10 0.022646
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R3 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.01683
? About the coefficient of r6 0.019474
? About the coefficient of r8 -0.03875
? About the coefficient of r10 0.034171
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R4 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.01678
? About the coefficient of r6 0.057631
? About the coefficient of r8 -0.06199
? About the coefficient of r10 0.029185
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R5 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.07378
? About the coefficient of r6 0.078871
? About the coefficient of r8 -0.04834
? About the coefficient of r10 0.007991
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R6 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.20739
? About the coefficient of r6 0.12271
? About the coefficient of r8 -0.04163
? About the coefficient of r10 0.006751
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R7 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.15706
? About the coefficient of r6 0.019487
? About the coefficient of r8 -0.00924
? About the coefficient of r10 0.001005
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R8 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.054595
? About the coefficient of r6 -0.04501
? About the coefficient of r8 0.010689
? About the coefficient of r10 -0.00087
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R9 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.01701
? About the coefficient of r6 0.02087
? About the coefficient of r8 -0.00363
? About the coefficient of r10 0.000212
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R10 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.07822
? About the coefficient of r6 0.013989
? About the coefficient of r8 -0.00152
? About the coefficient of r10 6.37E-05
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
Table 6: surperficial asphericity coefficient
Surface Edge
Object 100
1 0.18
Diaphragm 0.13436
3 0.361345
4 0.208736
5 0.052866
6 0.700429
7 0.0726
8 0.054707
9 0.625532
10 0.494114
11 0.625166
12 0.144313
13 0.505743
14 0.480978
15 0.3
16 0.55
Image 0
Table 7: edge thickness data
Table 8: refractive index data
Table 9: coke ratio (F/Number) data
Table 9A: coke ratio data (Continued)
Table 1 provides general optical information for the specific embodiment of optical imaging system 100 and 200.Table 2 is for eight different light fields, provide image sensor 106 or image sensor 206 measured along ythe image height of axle, and the flexible strategy of image field are separately provided.Table 3 comprises the vignetting data of eight image fields of indication in table 2.Table 4 is described the wavelength of ray separately of following the trail of in optical imaging system 100 and 200 shown in Fig. 1 and 2.Table 5 provides the summary of general optical surface characteristic for optical element 102 and optical element 202, comprise surface type, radius, thickness, material (from normal glass and plastics), diameter, conic constant and the remarks relevant with vignetting.Table 6 is for the even asphericity coefficient of surface description of table 5, and table 7 provides the information of edge thickness for those surfaces.Table 8, for the light field shown in table 2, provides multi-wavelength's refractive index data.Table 9 and 9A, for those identical wavelength and light field, provide F/# data.
More another aspects that Fig. 3 discloses according to this theme, describe the diagram that illustrates ejection formation plastic cement optical system 300 (being also called system 300).System 300 can be formed by multiple ejection formation plastics member.In one embodiment, two or more lens L1, L2, L3, L4 and L5 can be formed by single mold.In other specific embodiments, lens can be formed by mould out of the ordinary separately, and are assembled as shown in the figure after Cheng Mo.In other aspects, lens L1, L2, L3, L4 and L5 can be formed by another kind of Optical manufacture technology such as wafer scale optics manufactures.In the aspect of at least one exposure, system 300 can be similar in fact optical imaging system 100.In another aspect, system 300 can be similar in fact optical imaging system 200.According to other aspects again, system 300 can comprise MEMS hardware, its be configured to for along optical axis 302 by lens L1 displacement, and reach the focusing at system 300 image planes 304.In certain specific embodiments, system 300 can comprise surperficial R9 and the R10 of the lens surface R1 of lens L1 and the surperficial R5 of the surperficial R3 of R2, lens L2 and R4, lens L3 and the surperficial R7 of R6, lens L4 and R8 and lens L5, it is similar in fact the surperficial R1 to R10 shown in Fig. 1, as mentioned above.
Fig. 4, for optical imaging system as described herein, describes the diagram of filed curvature and F-Tan (Theta) Distortion (hereinafter referred to as distortion).Specifically, Fig. 4 describes filed curvature and the distortion of 10cm object distance, and it can be consistent with the optical imaging system of Fig. 1 100, as mentioned above.Filed curvature and distortion line chart utilize five kinds of wavelength that are respectively 0.470,0.510,0.555,0.610 and 0.650 μ m, and have the maximum field of view of 33.391 degree.The line chart of left-hand side is described the y axle along optical imaging system image plane, describes taking centimetre filed curvature as unit.Filed curvature data is for the sagitta of arc (Sagittal) ray (at Fig. 4 ' S ') and tangent ray (Tangential rays) (depicting ' T ' on Fig. 4 as) and describe.Learn by line chart is clear, filed curvature has minimum sagitta of arc ray on most of image plane, and filed curvature is to drop in several microns for the tangent ray of most of image plane, and is several microns (high y values) in the outer rim of image plane.
Dexter distortion line chart also comprises the curve of above-mentioned five kinds of wavelength.Distortion data is that normalization is to 0% in optical axis.The distortion of whole image plane is less than approximately 1.5%, and is less than one of percentage for low field angle.
Fig. 5, for the optical imaging system that infinite point object is focused on, describes the diagram of filed curvature and distortion.Therefore, the line chart of Fig. 5 can be consistent with the optical imaging system of Fig. 2 200, as mentioned above.The filed curvature of Fig. 5 and distortion line chart, for the maximum field of view angle of 34.897 degree, use the line chart of wavelength as Fig. 4.Filed curvature comprises lines and the horizontal ray (T) of those wavelength equally of the sagitta of arc ray (S) of indication wavelength.As shown in the figure, the filed curvature of 10cm place object in focus drops in 50 microns of about +/-.
Distortion at infinity changes slightly larger than the 10cm line chart of Fig. 4.On optical axis, the normalization that again will distort is to 0%.The scope of distortion is by approximately 0.5% pact-1.5% to image plane edge of middle field angle.The resultant distortion of all field angle is about 2%.
Fig. 6, for optical imaging system as described herein, describes the line chart of main lateral chromatic aberration.Specifically, the main lateral chromatic aberration figure of Fig. 6 is for 10cm object distance place object in focus, thereby can be consistent with the optical imaging system of Fig. 1 100, as mentioned above.The maximum field of view of main lateral chromatic aberration figure is 2.9560mm, and wavelength coverage is between 0.4700 and 0.6500 μ m.As shown in the figure, lateral chromatic aberration variation drops in 0.5 micron just for neglecting rink corner, is changed to just and is greater than-1 micron, and become large to approximately-1.5 microns for higher field angle for middle field angle.For image plane, entirety distortion maintains and is less than 2 microns.
Fig. 7, for infinite point object in focus, describes the line chart of main lateral chromatic aberration.Therefore, Fig. 7 can be consistent with the optical imaging system of Fig. 2 200, as mentioned above.Be similar to Fig. 6, the maximum field of view of wavelength between 0.4700 and 0.6500 μ m time is 2.9560mm.For low and middle field angle, main lateral chromatic aberration maintains or is less than approximately 1.5 microns.Only, in the time of larger field angle, main lateral chromatic aberration just exceedes 0.5 micron, reaches the peak value that is just greater than approximately 2 microns in the edge of image plane.
Fig. 8 describes the many lateral light fan figures of optical imaging system described herein at image plane place.Specifically, the lateral light fan figure of Fig. 8 is consistent with 10cm object distance place object in focus, thereby can be consistent with the optical imaging system of Fig. 1 100, as mentioned above.Lateral light fan figure, for various image height, describes the horizontal ray error (e along Z-axis y) and along the pupil diameter (P of transverse axis y).Best efficiency and least error are pointed out in more flat drawing, point out larger horizontal ray error along the relatively large deviation of Z-axis.As shown in Figure 8, near laterally ray error minimum (image height is little) optical axis, and substantially along with image height increases progressively.Level range is respectively by+25 microns to-25 microns along x and y axle.Lateral light fan figure comprises the wavelength between 0.470 and 0.650 wavelength.
Fig. 9 describes many lateral light fan figure for infinite point object in focus, thereby can be consistent with the optical imaging system of Fig. 2 200, as mentioned above.Be similar to Fig. 8, these drawing present least error near optical axis, and present substantially little error for the little pupil diameter of all field angle.Laterally ray error increases progressively when in field angle, higher and pupil diameter is higher especially.Substantially, the horizontal ray error ratio 10cm place object of infinite point object is also little.
Now refer to graphicly, Figure 10 describes the sectional view of optical system 1000 for the object at 10cm place, the layout that it comprises the optical element 1002 of putting in the mode of matching with respect to optical axis 1004.Enter the light of optical element 1002 left sides, thing side, can be in proper order and element 1002 reciprocations separately, and leave right side or the picture side of element 1002 towards image sensor 1006.Real image will be along optical axis 1004, is formed at from optical element 1002 specified distance, and this is called image distance (ID).It should be noted that ID depends primarily on the diopter (or optics multiplying power) of corresponding object distance (OD – is the distance between object and optical element 1002 along optical axis 1004) and combined optical element 102.
Sensor 1006 can be for example, digital apparatus containing photo switches, photo sensors multi-dimension array (, two-dimensional array) or pixel, and it can comprise ccd array, CMOS array etc.By the resolution of sensor 1006 digital image that produces, depend on the some pixels in sensor planar array 1008, it depends on He Zong array area, pixel region successively.Therefore, for example, for the relative square pixels (1.96 square micron) on about 1.4 microns of each limit, the square sensor array of 0.4cm can comprise nearly 8,100,000 pixels (Mp).In other words, this sensor resolution of 8Mp of can having an appointment.Reappear in electronics mode because pel array makes real image, the data being produced with electrical signal form by sensor 1006 can be stored to memory body, be projected to display (for example, numerical digit display screens) for inspecting, with software editor etc.
Will be appreciated that, the optical imagery shown in Figure 10 is arranged 1000 (and disclosed other optical imaging systems of this paper), does not specially draw in proportion.For example, the thickness of lens, position and height, in the time drawing, not necessarily become suitable ratio with physical size.On the contrary, the object of layout 1002 is to provide the vision content of imaging system, in order to understand disclosed other aspects herein in conceptive help.
Optical system 1000 comprises first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4 and the 5th lens L5 that concentrate on optical axis 104.Lens are started toward numbering as side from thing side.Therefore, the most close object of lens L1, and the most close image of lens L5.Aperture A1 can be embedded in lens L1 or can be fixed on L1 by entity.Therefore,, in this specific embodiment, aperture A1 does not move with respect to lens L1.In the particular aspect of this exposure, aperture A1 can have the degree of depth of 50 μ m.
Lens L1 to L5 respectively has two relative planes of refraction.The radius on surface is aspect sign separately, first has letter " R ", is then surface number, and the thing side of lens L1 is first.Therefore, surface is extremely sequentially the thing side R7He Xiang side R8 of R5He Xiang side, thing side R6, lens L4 and R9He Xiang side, the thing side R10 of lens L5 of R3He Xiang side, thing side R4, the lens L3 of R1He Xiang side, thing side R2, the lens L2 of lens L1 as side by thing side.Separately surperficial identification code (R1, R2, R3 ..., R10) be also used for represent separately surface radius.In addition, refractive index n irepresent with the refractive index of i surperficial associated lens medium and v_di to be and the Abbe number of i surperficial associated lens medium.
Lens L1 can have large positive diopter, and two optical surface R1 and R2 are convex surface.Person as used herein, word Hui object large or little diopter (no matter being plus or minus) is to the other lenses of certain optical systems comparatively speaking.Therefore, for example, in the time claiming that lens L1 has large positive diopter, implying that lens L1 compares with other positive focal power lens of optical system 1000, its positive diopter is greater than average positive diopter.On the contrary, have the lens of little positive diopter in optical system 1000, its positive diopter is less than average positive diopter.
In one embodiment, L1 can move with respect to lens L2 to L5 and sensor plane 1008.Can use MEMS or other suitable actuators to complete movement.In this specific embodiment, L2 to L5 remains fixing with respect to image sensor plane 1008 and image sensor 1006.In some aspects of this exposure, the moving range of L1 is near 100 μ m.L1 mobile allows optical system 1000 to maintain focusing on the object of various distances.In Figure 10, optical system 1000 focuses on the object of optical system 10cm distance.In Fig. 2, optical system 1100 focuses on the object of optics infinite point.
In certain specific embodiments, on the diopter of L1 and various distance objective thing, focus between required moving range and have inverse relationship.The L1 with higher focal power needs shorter moving range, and to focus on the object of various distances, vice versa.According to some aspects of this exposure, between lens L1 and L2, in the end play of optical axis or apart near 125 μ m, be approximately 170 in the gap of clear aperature.
L2 can have near meniscus shaped (optical axis than having less thickness away from optical axis place), and wherein optical surface R3 is convex surface, and optical surface R4 is concave surface.In some aspects of this exposure, lens L2 corrects for optical system 1000 provides most of aberration, and has negative diopter.Lens L3 can be biconvex near optical axis 1004, and reason is that optical surface R5 is convex surface near optical axis 1004, and deviates from optical axis 1004 and be concave surface, and is convex surface as side optical surface R6.According to some aspects of this exposure, lens L3 can have positive diopter.In certain specific embodiments, L2 can be installed to L3 above, make L2 be fixed on L3, and L2 does not touch the optical tubes that the lens L1 to L5 of optical system 1000 is arranged along optical axis 1004.
Lens L4 has well side optical surface R7 and convex as side optical surface R8.Lens L5 can be meniscus shaped, and it has convex optical surface R9 and is having near the optical surface R10 that is concave surface optical axis 104 near optical axis 1004.
Will be appreciated that, surperficial R1 to R10 (and this theme disclose other in full described optical surfaces, comprise the optical surface of system 200) can have various shapes.In an aspect, one or more surface can be sphere.In other aspects, one or more surface can be conical surface.In other aspects again, one or more surface can be aspheric surface according to suitable aspherical equation formula, as even aspherical equation formula:
( 1 ) - - - z = [ CY 2 { 1 + ( 1 - ( 1 + K ) C 2 Y 2 ) 1 / 2 } ] + Σ i ( A i * Y i ) , Wherein z is to a vertical height (sag height) (unit is mm) of lighting drawing line on the radial distance Y place aspheric surface shape lens surface of aspheric surface summit tangent plane by optical axis, C is the curvature of aspheric surface shape lens surface on optical axis, Y has been the radial distance (unit is mm) from optical axis, K is conic constant, and A ibe i asphericity coefficient, summation item number is even number i.But these aspects are not inferred as the scope that this theme discloses that limits.On the contrary, each surface can be grotesque aspheric surface shape or be the aspherical equation formula that contains even number and odd coefficients.
Continue above-mentioned, will be appreciated that, the lens L1 to L5 (and optical lens of optical system 1000) of optical system 1000 can be made up of the transparent material of various suitable types, form for the surface that produces optical quality according to various proper procedures.In an aspect, lens L1 to L5 can be frosted and polished glass, and its refractive index of the glass of wherein selecting makes compound lens L1 to L5 produce desirable effective focal length.In another aspect, lens can be the ejection formation plastics plastics of optical quality that another kind of proper method forms (or by) of optical quality, and wherein plastics have the refractive index that is applicable to provide desirable effective focal length.In at least one other aspects, lens L1 to L5 can for example, by (being similar to etched semiconductor wafer, solid state memory wafer, data are processed wafer) photoetching etch process, give etching self-induced transparency glass, crystallization or other appropriate configuration (for example, two oxygen silicon – SiO 2wafer).
According to various aspects, lens L1, L2, L3, L4 and L5 can be made of plastics (for example, APL5014, OKP4HT or ZE-330R or the another kind of suitable plastics with similar refractive index and Abbe number or its appropriately combined).In a particular aspect, lens L1, L3 and L5 make (for example, APL5014) by a kind of plastics, and lens L2 makes (for example, being respectively OKP4HT and ZE-330R) by different plastics from L4.But, will be appreciated that, in other aspects, lens can be other and separately have the material of similar Abbe number or refractive index.
Now please then consult Figure 11, expression be the aspect disclosing according to this theme, focus on the cross section of the example optical system of infinite point.The optical system 1100 of Figure 11 is similar to optical system 100, but with respect to 10cm, optical system 1100 is to focus on the object of infinite point.Difference between optical system 1100 and optical system 1000 is, L1 is placed in the distance different from sensor 1106 with respect to lens L2 to L5.
According to this theme disclose a particular aspect, beneath table 10 to 13 in, for lens L1, L2, L3, L4 and L5 provide prescription separately.Table 10 is listed general lens data for lens separately, and table 11 lists surperficial data, comprises distance between near radius (R) (unit is mm), surface optical axis, diameter and the material of lens separately of lens separately.Moreover as mentioned above, table 12 is for the aspheric surface of table 11, i=2 in provider's formula (1), 4,6,8,10,12,14,16 aspheric constants A i, index " i " is wherein to represent (for example,, as the optical design software formula ZEMAX producer of institute that can be provided by ZEMAX Development Corporation) by " r ".Table 13, for one group of wavelength, provides the refractive index n of i lens i.Table 14 provides contrasting of image field scope and image height, table 15 provides vignetting information for optical system 1000 and 1100, table 16 is provided for wavelength and the flexible strategy of Figure 10 and Figure 11 ray tracing, table 17 provides surperficial data for optical system 1000 and 1100, comprises radius, thickness, material, diameter and conic constant.In addition, table 18 provides edge thickness information for optical system 1000 and 1100.
Table 10: the general characteristic of optical system 1000 and 1100
(optical characteristics defining in optical design software Zemax)
Table 11: the surperficial data of the lens element of optical system 1000 and 1100
Table 11: continuous
Surface R1 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 0.021400101
? About the coefficient (Coeff) of r6 -0.0044229854
? About the coefficient (Coeff) of r8 -0.00018162551
? About the coefficient (Coeff) of r10 0
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R2 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 0.0013366226
? About the coefficient (Coeff) of r6 0.0044675095
? About the coefficient (Coeff) of r8 -0.0065254167
? About the coefficient (Coeff) of r10 0
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R3 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 -0.15575931
? About the coefficient (Coeff) of r6 0.11775238
? About the coefficient (Coeff) of r8 -0.040496241
? About the coefficient (Coeff) of r10 0
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R4 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 -0.17899613
? About the coefficient (Coeff) of r6 0.13165259
? About the coefficient (Coeff) of r8 -0.041877243
? About the coefficient (Coeff) of r10 0
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R5 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 -0.034806957
? About the coefficient (Coeff) of r6 -0.055196853
? About the coefficient (Coeff) of r8 -0.0076170308
? About the coefficient (Coeff) of r10 0
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R6 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 0.020581236
? About the coefficient (Coeff) of r6 -0.0065040866
? About the coefficient (Coeff) of r8 -0.018006387
? About the coefficient (Coeff) of r10 0
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R7 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 0.17752822
? About the coefficient (Coeff) of r6 0.0025820117
? About the coefficient (Coeff) of r8 0.0073104429
? About the coefficient (Coeff) of r10 -0.0065708267
? About the coefficient (Coeff) of r12 0
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R8 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 0.03288338
? About the coefficient (Coeff) of r6 0.076502466
? About the coefficient (Coeff) of r8 -0.06842281
? About the coefficient (Coeff) of r10 0.038984099
? About the coefficient (Coeff) of r12 -0.0076836467
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R9 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 -0.1830718
? About the coefficient (Coeff) of r6 0.075510932
? About the coefficient (Coeff) of r8 -0.034603365
? About the coefficient (Coeff) of r10 0.0066539539
? About the coefficient (Coeff) of r12 -0.00029016159
? About the coefficient (Coeff) of r14 0
? About the coefficient (Coeff) of r16 0
Surface R10 ?
? About the coefficient (Coeff) of r2 0
? About the coefficient (Coeff) of r4 -0.15124446
? About the coefficient (Coeff) of r6 0.071176496
? About the coefficient (Coeff) of r8 -0.029255744
? About the coefficient (Coeff) of r10 0.0080879291
? About the coefficient (Coeff) of r12 -0.0014220241
? About the coefficient (Coeff) of r14 0.00014276636
? About the coefficient (Coeff) of r16 -6.2275295e-006
Table 12: the asphericity coefficient of optical system 1000 and 1100
Table 13: the refractive index of optical system 1000 and 1100
Image field # X value Y value Flexible strategy
1 0 0 1
2 0 0.571 1
3 0 1.142 1
4 0 1.714 1
5 0 2.285 1
6 0 2.57 1
7 0 2.856 1
Table 14: image field type is to real image height (unit is mm)
Image field/# VDX VDY VCX VCY VAN
1 0 0 0 0 0
2 0 -0.00376 0.00001 0.003764 0
3 0 -0.00751 0.00003 0.007509 0
4 0 -0.01125 0.000093 0.011253 0
5 0 -0.01512 0.00015 0.015117 0
6 0 -0.01707 0.000226 0.017069 0
7 0 -0.019 0.000251 0.018997 0
1 0 0 0 0 0
Table 15: the vignetting factor of table 2 image field
Wavelength # Numerical value (unit be μ m) Flexible strategy
1 0.47 91
2 0.51 503
3 0.555 1000
4 0.61 503
5 0.65 107
Table 16: for the wavelength of ray tracing
Table 17: surperficial data summary
Surface Edge
Diaphragm 0.05
2 0.000726
3 0.315728
4 0.189805
5 0.491449
6 0.078721
7 0.308446
8 0.214072
9 0.303193
10 0.428579
11 1.31122
12 0.662695
13 0.3
14 0.4913
Image 0
Table 18: edge thickness data
Figure 12 describes the line chart of filed curvature and distortion for optics configuration 1002.In addition, shown is the many wavelength by 0.470 μ m to 0.650 μ m for scope, the numerical value of filed curvature and distortion.With regard to low field angle, for the filed curvature of these wavelength, in approximately 10 microns, filed curvature is even less than 100 microns at the periphery of image plane.In addition, distortion is just in time in 2% and-2% scope.Those skilled in the art knows clear, and aberration is just in time compensated by the optical arrangement 1002 of this theme.
Figure 13 describes the line chart of filed curvature and distortion for optics configuration 1102.In addition, shown is the many wavelength by 0.470 μ m to 0.650 μ m for scope, the numerical value of filed curvature and distortion.Filed curvature just in time in the scope of 100 microns of +/-, and distortion just in time 2% with-2% scope in.Those skilled in the art knows clear, and aberration is just in time compensated by the optical arrangement 1102 of this theme.
Figure 14 describes the line chart of lateral chromatic aberration for optical arrangement 1002.The maximum field of view of line chart is 2.8560mm.In addition, the wavelength coverage of lateral chromatic aberration curve is by 0.470 μ m to 0.650 μ m.The main lateral chromatic aberration of 10cm place object is in focus about-3.5 μ m, as shown in chart.
Figure 15, for infinite point object in focus, describes the line chart of the lateral chromatic aberration of optical arrangement 1102.The maximum field of view of line chart is 2.8560mm.In addition, the wavelength coverage of lateral chromatic aberration curve is by 0.470 μ m to 0.650 μ m.The main lateral chromatic aberration of infinite point object is in focus about+and 0.8 micron.
Figure 16 and Figure 17 describe respectively the lateral light fan figure of optical arrangement 1002 and 1102.Lateral light fan figure is for pupil diameter P yand P x, the lateral light fan figure (e along y and x axle is described yand e x).The image height of making lateral light fan figure is 0.000mm (1600 and 1700), 0.5710mm (1602 and 1702), 1.1420mm (1604 and 1704), 1.7140mm (1606 and 1706), 2.2850mm (1608 and 1708), 2.5700mm (1610 and 1710) and 2.8560mm (1612 and 1712).Drawing is substantially in the tolerance interval of optical imagery, and therefore, optical arrangement 1002 and 1102 has good image quality.
The atypical aspect that Figure 18 discloses according to this theme, for optical system 1800, describes the diagram that illustrates ray drafting figure.The layout that system 1800 comprises optical element 1802.Light ray is crossing in the visual field of optical system 1800 with optical element 1802 in diagram.On axle, ray is to focus on optical element 1802 to be associated on the optical axis of image plane or focal plane, and the ray of making a start with larger field angle is depicted as converged at from image plane optical axis compared with distant location.
Optical element 1802 leftmost sides are the thing side of optical system 1800, and optical element 1802 rightmost sides are the picture side of optical system 1800.The real image of object is through suitably giving forming at the image plane of optical element 1802 in focus time at optical element 1802.In at least one aspect disclosing at this theme, optical system 1800 can comprise zoom type optical system, and the subset of optical element 1802 can move along optical axis therein, to make the image focusing of object at image plane.In particular aspect, one group of position of the subset of optical element 1802 can be with consistent in image plane one group of object distance that image focal point is aimed at separately.In other words,, when a period of time that the subset of optical element 1802 is placed in this group position, the object at a corresponding person place of this group object distance will be in image plane in focus.As follows, as shown in Figure 18 and Figure 19, the location expression of optical element 1802 illustrates and arranges, the optical element of system 1800 is positioned at one of them position, so that the object that is placed in infinite point is focused on image plane.As follows, as shown in Figure 23 and Figure 24, the location expression of optical element 1802 illustrates and arranges, optical element is positioned at one of them position, so that near field object is focused on image plane.
Figure 19 discloses other aspect according to this theme, describes the diagram containing the exemplary optical systems 1900 of optical element and optical surface.Optical system 1900 can be similar in fact optical system 1800.As shown, optical system 1900 is for example configured to, for the image of the object that is placed in far field (, infinite distance) is focused on.
Optical system 1900 can comprise one group of optical element 1902 in putting along optical axis 1904.The image that optical element 1902 can be configured to for being captured by sensor 1908 focuses on.Sensor 1908 can comprise the multi-dimension array of the photosensitive pixel that is placed in sensor 1908 image plane places.Photosensitive pixel can be responded by optical element 1902 and focuses on the electromagnetic energy (for example, light) on sensor 1908 and electric signal is exported.And electric signal can have the characteristic relevant with electromagnetic energy optical characteristics.As described herein or the affiliated known person in field, the image that these electric signal can be used to make optical element 1902 focus on and be captured by sensor 1908 reappears.Optical system 1900 also can comprise the cover plate 1906 for sensor 1908.Cover plate can protect the photosensitive pixel of sensor 1908 to avoid suffering dust or other particle, otherwise it likely absorbs or make the electromagnetic energy scattering that optical element 1902 focuses on, thereby makes image produce distortion.
Optical element 1902 can comprise five optical lenses, comprises lens L1, lens L2, lens L3, lens L4 and lens L5 (being referred to as lens L1 to L5).Optical lens is by left (the thing side of optical system 1900) to right (the picture side of optical system 1900) numbering.The lens L1 of the leftmost side is therefore herein also referred to as thing side lens.Or, lens L1 can be called to the object lens of optical system 1900.
As shown in the figure, lens L1 is a kind of biconvex lens, and it has positive optics multiplying power, and has protruding thing side R1 and protruding picture side R2.Moreover with respect to lens L2, L3, L4 and the L5 of optical element 1902, lens L1 can have high light and learn multiplying power.In particular aspect, lens L1 can have any one large positive optics multiplying power also than lens L2, L3, L4 and L5.In another aspect, L1 can have than large positive optics multiplying powers also of any subset of lens L2, L3, L4 and L5.In at least one abnormal type or other aspect, lens L1 can have than also large positive optics multiplying power of the combination of lens L2, L3, L4 and L5.As shown in the figure, aperture diaphragm A1 can be placed near the thing side R1 of lens L1.
Lens 2 can be a kind of lens with negative optics multiplying power.Lens L2 can have R3He Xiang side, thing side R4.Can dimpling in some aspects that surface R3 discloses at this theme.In other aspects, it is smooth and without significant optics multiplying power that surperficial R3 can be in fact.In other aspects again that disclose at this theme, surface R3 can have comprehensive curvature, its pupil radius subset for surperficial R3 (for example, from the distance range of optical axis 1904) is convex surface, and is concave surface for different subsets of the pupil radius of surperficial R3.As shown in the Examples, surperficial R3 can have concave curvature by optical axis 1904 to first pupil radius, and can have convex curvature by the first pupil radius to the second pupil radius, and wherein the second pupil radius is greater than the first pupil radius.Can have concave curvature as side R4, it provides the negative optics multiplying power of major part of lens L2.
Lens L3 can be the concave-convex lens towards the thing side of lens L3 with convex curvature.As shown in the figure, R5Ji Xiang side, lens L3 inclusion side R6.Thing side R5 can have convex curvature.In particular aspect, the convexity of thing side R5 is comparable also strong near lens L3 periphery near optical axis 1904.In other words, the radius of thing side R5 can increase and increase progressively along with thing side R5 pupil radius, and at least one aspect, near the periphery of lens L3, becomes infinity.Can there is concave curvature as side R6.In at least one aspect, can increase progressively along with the increase of lens L3 pupil radius as the radius of side R6.In an atypical or other aspect, near the periphery of lens L3, can be convex surface as side R6.
Lens L4 inclusion side R7Ji Xiang side R8.Lens L4 can be the concave-convex lens towards optical element 1902 picture sides.In addition, lens L4 can have micro-positive optics multiplying power.In an atypical or other aspect, the positive focal power of lens L4, can be larger optical axis 1904 near compared to the periphery of lens L4, and in other aspects, positive focal power look like on the surface of side R8 can essence constant.
Lens L5 inclusion side R9He Xiang side R10.Thing side R9 can have concave curvature for low and middle field angle, and curvature can reduce in the time of higher field angle.Near optical axis 1904, can be concave surface as side R10.In addition, in high field angle, can change into convex surface by concave surface as side R10.
Optical element 1902 can have space (air gap) separately separately between lens L1, L2, L3, L4 and L5.In a particular aspect, clearance on the axle between lens L4 and lens L5, can be the maximum in one group of clearance between lens L1 to L5.In an atypical or other aspect, the clearance between lens L3 and lens L4 can be the second largest person in one group of clearance between lens L1 to L5.
In another aspect disclosing at this theme, actuator can be connected to the subset of optical element 1902.In one embodiment, actuator can be MEMS actuator, and in other aspects, known another kind of actuator in field under actuator can be.Actuator can be configured to the subset for again put optical lens along optical axis 1904.Reorientating of optical lens subset can make the object image at different object distances place focus on the sensor 1908 of optical system 1900.In particular aspect, optical lens 1902 can be configured to for by be placed in far field (for example, infinite distance ...) object image focus on sensor 1908.According to other aspect, the subset of optical element 1902 can be put again, so that the object in sensor 1908 near fields is focused on.In a particular aspect, the subset of optical element can comprise lens L1, and lens L1 can be positioned to as shown in figure 19 by MEMS actuator, so that the object that is placed in infinite point is focused on to sensor 1908, and can be positioned to as shown in figure 23 by MEMS actuator, so that the object at 12.8 centimeters of (cm) object distance places of essence is focused on to sensor 1908.
In another aspect, can aperture diaphragm A1 be fixed with respect to optical axis 1904.In another aspect, can be with respect to the position constant aperture diaphragm A1 of lens L1.In aspect after, can, in the time that the image of object is focused on sensor 1908, together with lens L1, move aperture diaphragm A1 by MEMS actuator.According to other aspects again, can be separately or together with aperture diaphragm A1, MEMS actuator is configured to for along the total distance of optical axis 1904 mobile lens L1 mono-.This total distance can focus on the image of infinite point object on sensor 1908 in its one end, and in its other end, the image of essence 12.8cm object distance place object is focused on to sensor 1908.
Lens L1 to L5 can be the suitable light transmissive material of each suitable type, and is formed for the surface that produces optical quality according to proper method.In an aspect, lens L1 to L5 can be frosted and polished glass, and its refractive index of the glass of wherein selecting makes compound lens L1 to L5 produce desirable effective focal length.In another aspect, lens can be the ejection formation plastics plastics of optical quality that another kind of proper method forms (or by) of optical quality, and wherein plastics have the refractive index that is applicable to provide desirable focal length.In other aspect, lens L1 to L5 can utilize the photoetching etch process that is similar to etched semiconductor wafer, gives etching self-induced transparency glass, crystallization or other appropriate configuration.In particular aspect, lens L1 to L5 is above-mentioned or similarly suitable manufacturing technology (note that lid 1908 is for fabricating material) by one or more, can be different glass, plastics or suitable light transmission medium.In another aspect, the optical prescription to 27A according to table 19, illustrates optical element 1902.
Parameter declaration Numerical value
Effective focal length (in air, under system temperature and pressure) 4.803702
Effective focal length (image space) 4.803702
Back focal length 0.1097044
Total track lenth (TTL) 5.588093
Image space F/# 2.668723
Flat axle work F/# 2.668742
Work F/# 2.647852
Image space NA 0.1841501
Object space NA 9e-007
Diaphragm radius 0.9
Flat axle image height 3.492
Flat axle multiplying power -4.803736e-006
Entrance pupil diameter 1.8
Entrance pupil position 0.05
Emergent pupil diameter 1.214476
Emergent pupil position -3.231397
Maximum radial field 3.492
Lens unit Centimetre (mm)
Angular magnification 1.482119
Table 19: general optical characteristics (infinite point object in focus)
Image field # X value Y value Flexible strategy
1 0 0 1
2 0 0.339 1
3 0 0.678 1
4 0 1.018 1
5 0 1.357 1
6 0 1.696 1
7 0 2.035 1
8 0 2.375 1
9 0 2.714 1
10 0 3.053 1
11 0 3.392 1
12 0 3.492 1
Table 20: image field type is to real image height (unit is mm)
Image field/# VDX VDY VCX VCY VAN
1 0 0 0 0 0
2 0 0 0 0 0
3 0 0 0 0 0
4 0 0 0 0 0
5 0 0 0 0 0
6 0 0 0 0 0
7 0 -0.005032 0.000003 0.005032 0
8 0 -0.018773 0.000041 0.018775 0
9 0 -0.031175 0.000230 0.031178 0
10 0 -0.062274 0.000739 0.062281 0
11 0 -0.154303 0.005254 0.154319 0
12 0 -0.218933 0.013148 0.218954 0
Table 21: the vignetting factor of table 20 image field
Wavelength # Numerical value (unit be μ m) Flexible strategy
1 0.4358 0.15
2 0.4861 0.45
3 0.5461 1.00
4 0.5876 0.80
5 0.6563 0.10
Table 22: for the wavelength of ray tracing
Table 23: surperficial data summary
Surface Parameter declaration Numerical value
R1 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.0072492627
? About the coefficient of r6 -0.0011425636
? About the coefficient of r8 -0.026147557
? About the coefficient of r10 0.02892707
? About the coefficient of r12 -0.015728565
? About the coefficient of r14 0
? About the coefficient of r16 0
R2 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.018496708
? About the coefficient of r6 0.041017657
? About the coefficient of r8 -0.14989043
? About the coefficient of r10 0.18705355
? About the coefficient of r12 -0.081043198
? About the coefficient of r14 0
? About the coefficient of r16 0
R3 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.04452888
? About the coefficient of r6 0.1590456
? About the coefficient of r8 -0.32756888
? About the coefficient of r10 0.38155806
? About the coefficient of r12 -0.15580658
? About the coefficient of r14 0
? About the coefficient of r16 0
R4 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.067461498
? About the coefficient of r6 0.16544449
? About the coefficient of r8 -0.23156178
? About the coefficient of r10 0.20660588
? About the coefficient of r12 -0.067541427
? About the coefficient of r14 0
? About the coefficient of r16 0
R5 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.10351059
? About the coefficient of r6 0.083284677
? About the coefficient of r8 -0.073446626
? About the coefficient of r10 0.031355945
? About the coefficient of r12 -0.005953706
? About the coefficient of r14 0
? About the coefficient of r16 0
R6 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.080839736
? About the coefficient of r6 0.05806703
? About the coefficient of r8 -0.042396061
? About the coefficient of r10 0.013117216
? About the coefficient of r12 -0.001392345
? About the coefficient of r14 0
? About the coefficient of r16 0
R7 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.061283862
? About the coefficient of r6 0.056005953
? About the coefficient of r8 -0.023784572
? About the coefficient of r10 0.004382924
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R8 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.005176523
? About the coefficient of r6 0.02067126
? About the coefficient of r8 0.001625502
? About the coefficient of r10 -0.001134584
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R9 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.019100544
? About the coefficient of r6 -0.000208483
? About the coefficient of r8 5.84E-05
? About the coefficient of r10 -3.36E-06
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R10 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.038366245
? About the coefficient of r6 0.004903112
? About the coefficient of r8 -0.000509017
? About the coefficient of r10 1.88E-05
? About the coefficient of r12 1.99E-07
? About the coefficient of r14 0
? About the coefficient of r16 0
Table 24: surperficial asphericity coefficient
Surface Edge
Object 1000000
1 0.05
Diaphragm 0.036971
3 0.45386
4 0.053525
5 0.17191
6 0.53351
7 0.123651
8 0.113652
9 0.301427
10 0.121772
11 0.050401
12 0.30346
13 0.767748
14 0.053483
15 0.953242
16 0.972839
17 0.3
18 0.1
Image 0
Table 25: edge thickness data
Table 26: refractive index data
Table 27: coke ratio (F/Number) data
Table 27A: coke ratio data (Continued)
Table 19 for the specific embodiment of the optical system 1800 and 1900 of Figure 18 and Figure 19, provides general optical information respectively.Table 20, for one group of light field, provides at the measured image height along y axle of image sensor 1906, and the flexible strategy of image field is separately provided.Table 21 comprises the vignetting data of that group light field of table 20.Table 22 is described in optical imaging system 1800 shown in Figure 18, the wavelength of ray separately of following the trail of.Table 23, for the lens of optical element 1902, provides the summary of general optical surface characteristic, comprises that surface type, radius, thickness, material are (from normal glass and plastics; The dummy material for lid glass 1908), diameter conic constant and be suitable for explain (applicable notes).Table 24 is for the surface description asphericity coefficient of table 23, and table 25 provides the information of edge thickness for those surfaces.Table 26, for the light field shown in table 20, provides multi-wavelength's refractive index data.Table 27 and 27A, for those identical wavelength and light field, provide F/# data.
Figure 20, for the optical system 1800,1900 of Figure 18 and Figure 19, describes the diagram of filed curvature and distortion, as mentioned above.Specifically, the filed curvature shown in Figure 20 and distortion, be configured to for infinite point object image being focused on to optical element 1902 on sensor 1906 consistent.Filed curvature is utilized five kinds of wavelength with distortion line chart, comprises respectively 0.436,0.486,0.546,0.588 and 0.656 μ m.And, follow the trail of ray and have the maximum field of view of 35.543 degree.The line chart of left-hand side is described the y axle along optical imaging system image plane, describes taking centimetre filed curvature as unit.The curvilinear system of described filed curvature is for sagitta of arc ray (being described with ' S ') and tangent ray (being described with ' T ').The filed curvature scope of wavelength used, ties up in several microns for the sagitta of arc and tangent ray.The dexter distortion of Figure 20 also comprises the curve of above-mentioned five kinds of wavelength.Distortion data is in the normalization of optical axis system to 0%.Run through image plane, distortion is less than approximately-1%, and in to low field angle, lower than about +/-0.5%.
Figure 21 describes the diagram of longitudinal aberration for one group of wavelength.The longitudinal aberration of Figure 21 is relevant with optical element 1902, its be configured to for order be placed in infinite point object imaging on sensor 1906.Listed wavelength comprises 0.436,0.486,0.546,0.588 and 0.656 μ m.With regard to the pupil radius of 0.9mm, line chart for the field angle increasing progressively taking centimetre as unit draw longitudinal aberration.In the time of low field angle, longitudinal aberration is substantially on the occasion of and is less than approximately 0.02 centimetre.In the time of high field angle, longitudinal aberration is negative value more, and is less than substantially approximately 0.03 centimetre.The longitudinal aberration line chart of Figure 21 points out, optical element 1902 to shown in wavelength rationally good aberration correction is provided.
Figure 22 describes the line chart of lateral chromatic aberration for the optical element 1902 of Figure 19, as mentioned above.Therefore, the line chart of lateral chromatic aberration is relevant with optical element 1902, and it is to be configured to for the image of the object that is placed in infinite point is focused on sensor 1906.The maximum field of view of lateral chromatic aberration figure is 3.3920 centimetres, and the wavelength coverage of lateral chromatic aberration figure is by 0.4358 to 0.6563 μ m.In addition, the data of quoting is 0.546100 μ m.The lateral chromatic aberration of extreme field angle (most field angles) drops in 0.5 micron of about +/-.In the time of high field angle, the lateral chromatic aberration that lower wavelength presents is about-1 micron or larger value, and the lateral chromatic aberration that upper wavelength presents is about 1 micron.
Figure 23, according to the exposure of this theme other aspects again, describes the diagram of exemplary optical systems 2300.Optical system 2300 can comprise one group of optical element 2302, as shown in the figure.In at least one aspect disclosing at this theme, optical element 2302 can comprise one group of essence and be similar to the lens of optical element 1802 and 1902 shown in Figure 18 and Figure 19, described above, but has different focal positions.Particularly, one group of optical element 2302 can be put according to the mode that is applicable to the near field object image to focus on optical element 2302 image planes.As shown in the figure, the object position, near field of optical element 2302 is 12.8cm.By the subset of reorientating optical element 2302 between position shown in Figure 23 and Figure 19 optical element 1902 positions, optical system 2300 can focus on the different object distances between near field object and infinite point object.
Optical system 2300 is described one group of light fan, and its expression is incident on the light on optical element 2302 with discrete field angle.By converging at the light of optical system 2300 at optical element 2302 image plane place optical axises, the field angle that description value is zero.Increase progressively distance from optical axis, light converges at the point on image plane, represents the light with the larger field angle contact optical of correspondence element 2302.
Figure 24, according to the exposure of this theme other aspects again, describes the diagram of exemplary optical systems 2400.Optical system 2400 is described optical lens and the related optical surface of optical system 2300 shown in Figure 23.In addition, at least one aspect, the optical lens of optical system 2300 and related optical surface can essence be similar to optical lens and the optical surface of optical system 1800 and 1900, as mentioned above.Optical system 2400 can be with the difference of optical system 1800 and 1900, and optical element 2402 can be configured to for the image that is placed in essence 12.8cm place object is focused on to sensor 2408.Other aspects of optical system 2400 and optical element 2402 comprise R9 and the R10 of the optical surface R1 of lens L1 and the R5 of the R3 of R2, lens L2 and R4, lens L3 and the R7 of R6, lens L4 and R8 and lens L5.In addition, sensor 2408 and lid glass 2406 can be similar in fact sensor 1906 and the lid glass 1908 of optical system 1900.
According to this theme disclose particular aspect, optical element 2402 comprises object lens, i.e. lens L1, its be connected to actuator (for example, MEMS actuator ...) and contribute to the automatic focusing of optical system 2400.In the layout of optical element 2402 shown in Figure 24, and especially at the clearance place between lens L1 and lens L2, i.e. distance near, optical element 2402 is to be configured to for the real image of 12.8cm object distance place object is focused on sensor 2408.By lens L1 is moved into, in the position shown in Figure 19 optical element 1902, (wherein the clearance between lens L1 and lens L2 is distance far), separately optical system 2400 can be configured to the image for focusing on infinite point object.In at least one abnormal type disclosing at this theme or other aspect, can again put lens L1 to change between distance nearwith distance farbetween clearance, thereby the image of the object that is placed between 12.8cm and infinite point point position is focused on to sensor 2408.Optical element 2402 can have if table 28 is to the image characteristics as described in the optical characteristics of 31A.
Parameter declaration Numerical value
Effective focal length (in air, under system temperature and pressure) 4.673877
Effective focal length (image space) 4.673877
Back focal length -0.05732965
Total track lenth (TTL) 5.668093
Image space F/# 2.596598
Flat axle work F/# 2.747179
Work F/# 2.738746
Image space NA 0.1790633
Object space NA 0.007028331
Diaphragm radius 0.9
Flat axle image height 3.492
Flat axle multiplying power -0.03861711
Entrance pupil diameter 1.8
Entrance pupil position 0.05
Emergent pupil diameter 1.198642
Emergent pupil position -3.269722
Maximum radial field 3.492
Lens unit Centimetre (mm)
Angular magnification 1.501698
Table 28: general optical characteristics (about 12.8cm place object in focus)
Image field/# VDX VDY VCX VCY VAN
1 0 0 0 0 0
2 0 0 0 0 0
3 0 0 0 0 0
4 0 0 0 0 0
5 0 0 0 0 0
6 0 0 0 0 0
7 0 -0.00588 0.000003 0.005875 0
8 0 -0.02139 0.000058 0.021397 0
9 0 -0.0355 0.00023 0.035498 0
10 0 -0.06623 0.000798 0.066238 0
11 0 -0.16868 0.006487 0.1687 0
12 0 -0.24396 0.016135 0.243989 0
Table 29: the vignetting factor of table 20 image field
Table 30: surperficial data summary
Table 31: coke ratio (F/Number) data
Table 31A: coke ratio data (Continued)
Optical characteristics and image characteristics that table 28 comprises optical system 2400 to 31A, it is different from the configuration of optical system 1900.Table 28, for the specific embodiment of optical system 2400, provides general optical information.Table 29 comprises the vignetting data of that group light field of table 20.Table 30 is for the lens of optical element 2402, the summary of general optical characteristics is provided, comprise surface type, radius, thickness, material (from normal glass and plastics, comprising the dummy material for lid glass 2408), diameter, conic constant and be suitable for and explain.Table 31 and 31A be long and light field for institute's standing wave, and F/# data is provided.
Figure 25, for the optical system 2400 of Figure 24, describes the diagram of filed curvature and distortion, as mentioned above.Comprise 0.436,0.486,0.546,0.588 and 0.656 μ m for filed curvature and the wavelength of distortion line chart.Through following the trail of the ray that is used for producing these line charts, the maximum field of view of its field angle unit is 34.188 degree.The filed curvature of tangential and sagitta of arc ray, for all field angle, is just being substantially and is being less than about 0.05mm.In be less than approximately 1% to the distortion of low field angle, the distortion of high field angle is increased to approximately 1.6%.
Figure 26 describes the diagram of longitudinal aberration for optical system 2400.The longitudinal aberration line chart providing is for five kinds of wavelength, comprises 0.436,0.486,0.546,0.588 and 0.656 μ m.Line chart is for the field angle increasing progressively, and centimetre to draw longitudinal aberration as unit, its pupil radius is 0.9mm.In the time of low field angle, longitudinal aberration is substantially on the occasion of and is less than approximately 0.04 centimetre.In the time of higher field angle, longitudinal aberration is from positive to negative for its scope of different field angle, and substantially between+0.03 centimetre and approximately-0.035 centimetre.
Figure 27, for the optical element 2402 of Figure 24, describes the line chart of lateral chromatic aberration, as mentioned above.The line chart of lateral chromatic aberration is relevant with optical element 2402, and it is configured to for the image that is placed in about 12.8cm place object is focused on sensor 2406.The maximum field of view of lateral chromatic aberration figure is 3.3920 centimetres, and the scope of line chart wavelength used is by 0.4358 to 0.6563 μ m.In addition, the data of quoting is 0.546100 μ m.For all field angle, lateral chromatic aberration is less than approximately+3 microns and be greater than approximately-1 micron.In the time of low and middle field angle, the scope of lateral chromatic aberration is between approximately+1 micron and-0.25 micron.
One or more other aspect that Figure 28 A to Figure 28 D discloses according to this theme, describes exemplary optical systems.Optical system system is shown in the upper left corner of Figure 28 A, and its configuration system focuses on the image of infinite point object on the sensor of optical system.Figure 29 A to Figure 29 D describes exemplary optical systems, and its configuration system focuses on the image of near field object on the sensor of optical system.Can, for example by reduction between the first leftmost side lens of the most close optical system thing side, near the clearance between optical system thing side the second lens person, reach the latter's configuration.
Optical system comprises five lens substantially, extremely comprises lens L1 (being also called object lens), lens L2, lens L3, lens L4 and lens L5 (being referred to as lens L1 to L5) as side by thing side.And the optical system of Figure 28 A to Figure 28 D can comprise two or more lens combination, it is to be defined at least partly in two or more lens combination separately on the axle between lens between lens on clearance.As shown in an embodiment, five of an optical system lens layout can be become to two lens combination, first lens group starts to comprise first lens, the second lens and the 3rd lens from the thing side of optical system, and the second lens combination starts to comprise the 4th lens and the 5th lens from the thing side of optical system.Described lens combination is to be limited between lens, have clearance on axle, and on this axle, clearance is less than clearance on the axle between first and second lens combination.
Figure 28 B to Figure 28 D describes the image characteristics of optical system shown in Figure 28 A, and it is to be configured to for infinite point object image being focused on to (far field focusing configuration) on optical system sensor.Figure 29 B to Figure 29 D describes the image characteristics of optical system shown in Figure 29 A, and it is configured to near field object being focused on to (near field focusing configuration) on sensor.Figure 28 B focuses on configuration for far field and describes the line chart of filed curvature and distortion, and it,, for the wavelength between approximately 0.47 and approximately 0.65 micron, has and be greater than approximately 32 maximums field of view of spending.Figure 28 C, for the far field configuration of above-mentioned wavelength and the pupil radius of about 0.991mm, describes the line chart of longitudinal aberration, and Figure 28 D is for the configuration of approximately 2.956 centimetres of maximums field of view, reference approximately 0.555 micron wave length, describes the line chart of lateral chromatic aberration.
Figure 29 B, for the near field configuration of optical system shown in Figure 29 A, describes filed curvature and distortion.Filed curvature and distortion, for the wavelength between approximately 0.470 and approximately 0.650 micron, have the maximum field of view of approximately 34.51 degree.Figure 29 C, for the near field configuration of approximately 0.470,0.510,0.555,0.610 and 0.650 micron of approximately 0.991 centimetre of pupil radius and wavelength, describes longitudinal aberration.Figure 29 D is the near field configuration of 0.555 micron for approximately 2.9560 centimetres of maximums field of view and reference wavelength, describes the line chart of lateral chromatic aberration.Beneath optics and the image characteristics providing by table 32 to 40A, the optical system of key diagram 28A and Figure 29 A.
Parameter declaration Numerical value
Effective focal length (in air, under system temperature and pressure) 4.309199
Effective focal length (image space) 4.309199
Back focal length 0.528864
Total track lenth (TTL) 5.348668
Image space F/# 2.44563
Flat axle work F/# 2.44563
Work F/# 2.468005
Image space NA 0.200303
Object space NA 8.81E-11
Diaphragm radius 0.881
Flat axle image height 2.956
Flat axle multiplying power 0
Entrance pupil diameter 1.762
Entrance pupil position 0
Emergent pupil diameter 1.257817
Emergent pupil position -3.09729
Maximum radial field 2.956
Lens unit Centimetre (mm)
Angular magnification 1.400838
Table 32: general optical characteristics (infinite point object in focus)
Image field # X value Y value Flexible strategy
1 0 0 1
2 0 0.571 1
3 0 1.142 1
4 0 1.714 1
5 0 2.285 1
6 0 2.57 1
7 0 2.856 0.2
8 0 2.956 0.2
Table 33: image field type is to real image height (unit is mm)
Image field/# VDX VDY VCX VCY VAN
1 0 0 0 0 0
2 0 0.003903 0.00001 0.003903 0
3 0 0.007781 0.000035 0.007783 0
4 0 0.01172 0.000106 0.011721 0
5 0 -0.00257 0.000337 0.034007 0
6 0 -0.04564 0.001626 0.08102 0
7 0 -0.09687 0.005447 0.136263 0
8 0 -0.14243 0.009529 0.183383 0
Table 34: the vignetting factor of table 20 image field
Wavelength # Numerical value (unit be μ m) Flexible strategy
1 0.47 91
2 0.51 503
3 0.555 1000
4 0.61 503
5 0.65 107
Table 35: for the wavelength of ray tracing
Table 36: surperficial data summary
Surface Parameter declaration Numerical value
R1 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.00386
? About the coefficient of r6 0.009055
? About the coefficient of r8 -0.01604
? About the coefficient of r10 0.006453
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R2 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.014879
? About the coefficient of r6 -0.02489
? About the coefficient of r8 0.011334
? About the coefficient of r10 0.003758
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R3 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.001774
? About the coefficient of r6 -0.03857
? About the coefficient of r8 0.035738
? About the coefficient of r10 -0.00277
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R4 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.00027
? About the coefficient of r6 0.001123
? About the coefficient of r8 0.000761
? About the coefficient of r10 0.006183
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R5 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.04891
? About the coefficient of r6 0.029453
? About the coefficient of r8 -0.01911
? About the coefficient of r10 0.004124
? About the coefficient of r12 0
? About the coefficient of r14 0
? About the coefficient of r16 0
R6 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.13503
? About the coefficient of r6 0.048368
? About the coefficient of r8 0.001742
? About the coefficient of r10 -0.00582
? About the coefficient of r12 0.00078
? About the coefficient of r14 5.79E-05
? About the coefficient of r16 0.000106
R7 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.1187
? About the coefficient of r6 0.031933
? About the coefficient of r8 -0.0214
? About the coefficient of r10 0.008804
? About the coefficient of r12 -0.0012
? About the coefficient of r14 -0.00074
? About the coefficient of r16 0.000216
R8 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.070788
? About the coefficient of r6 -0.01663
? About the coefficient of r8 -0.00017
? About the coefficient of r10 -0.00047
? About the coefficient of r12 0.000282
? About the coefficient of r14 -1.50E-05
? About the coefficient of r16 -2.54E-06
R9 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 0.019234
? About the coefficient of r6 0.011958
? About the coefficient of r8 -0.00178
? About the coefficient of r10 1.79E-05
? About the coefficient of r12 5.79E-06
? About the coefficient of r14 9.92E-07
? About the coefficient of r16 4.90E-08
R10 Evenly aspheric surface ?
? About the coefficient of r2 0
? About the coefficient of r4 -0.10214
? About the coefficient of r6 0.027793
? About the coefficient of r8 -0.0071
? About the coefficient of r10 0.000868
? About the coefficient of r12 1.66E-05
? About the coefficient of r14 -1.31E-05
? About the coefficient of r16 7.35E-07
Table 37: surperficial asphericity coefficient
Surface Edge
Diaphragm -0.05
2 0.184732
3 0.400359
4 0.15927
5 0.723662
6 0.044372
7 0.05
8 0.026648
9 0.560283
10 0.571295
11 0.51101
12 0.022871
13 0.05
14 0.126282
15 0.613075
16 0.40481
17 0.3
18 0.55
Image 0
Table 38: edge thickness data
Table 39: refractive index data
Table 40: coke ratio (F/Number) data
Table 40A: coke ratio data (Continued)
Figure 32 to Figure 40 A provides optics and the image characteristics shown in Figure 28 A with the optical system of far field focusing configuration.Table 32 provides general optical information for optical system.Table 33, for one group of light field and the flexible strategy separately of light field separately, provides the measured image height along y axle of image sensor in optical system.Table 34 comprises the vignetting data of that group light field of table 33.Table 35 is described and shown in Figure 28, in optical imaging system, is followed the trail of the wavelength of ray separately.Table 36, for the lens of optical system, provides the summary of general optical surface characteristic, comprises surface type, radius, thickness, material (from normal glass and plastics), diameter, conic constant and be suitable for explaining.Table 37 is for the surface description asphericity coefficient of table 35, and table 38 provides the information of edge thickness for those surfaces.Table 39 provides refractive index for multi-wavelength and the light field that lists.Table 40 and 40A, for those identical wavelength and light field, provide F/# data.
Person as used herein, word group " exemplary " is to intend to be used for representing to be used as embodiment, example or example to separate.Any aspect or the design of conduct described herein " exemplary ", it is better or favourable must not infering in other aspect or design aspect.On the contrary, use the exemplary concept being intended to for representing concrete mode of word group.Person as used in the present application, the "or" of including property is intended to be used for representing by word Hui "or" system, and the "or" of nonexcludability.That is, unless otherwise stated, or learn by content is clear, " X uses A or B " is to intend to be used for representing any naturally including property arrangement.That is, if X uses A; X uses B; Or X dual-purpose A and B, under any previous examples, all meet " X uses A or B ".In addition, article " ", as used in the application's case and claims, learns to be for singulative unless otherwise stated or by content is clear, should give substantially and infer to expression " one or more ".
Moreover, each position with the optical system associated electrical subsystem of exposure described herein, can comprise or it consists of artificial intelligence or knowledge or formal style assembly, sub-component, program, means, method or mechanism (for example, support vector machine, neural network, expert system, Bei Shi confidence networking (Bayesian belief networks), fuzzy logic, data fusion engines, grader ...).Especially, these assemblies also have already described person herein, and specific mechanism or the program of can Institute of Automation carrying out, to make part system and method more applicable and efficient and have wisdom.For example, the optimization that these assemblies can robotization optical system image quality, as mentioned above (for example, referring to the electronic installation 500 of above-mentioned Fig. 5).
More than explanation comprises the embodiment of the aspect of the technical theme of requirement protection of the patent right.Certainly; unlikely require the technical theme of protection of the patent right and each combination of expecting of illustrated components or method in order to illustrate; but affiliated field has common skill, person can see clearly, many further combination and the arrangement of the technical theme that discloses are possible.Therefore, the technical theme that discloses system intend to be used for to include all this type of and drop on variation, amendment and the variation in claims spirit and scope.Moreover, because being used as adversative in claims, annotated " comprising ", therefore the word Hui that embodiment or claims use in any one " comprises " or " having ", with regard to meaning, be to intend to be used for to be similar to the mode that word Hui " comprises " and belong to including property.

Claims (45)

1. an optical imaging system of arranging along optical axis, it comprises:
One group of optical lens, it comprises first lens group and the second lens combination, wherein this second lens combination is fixed on appropriate location along this optical axis;
MEMS (micro electro mechanical system) (MEMS) actuator, it is mechanically connected to this first lens group, and be configured to for adjusting the position of this first lens group along this optical axis, wherein first adjust position and be configured to for the image being placed in away from the object of this optical imaging system is focused on the image plane being associated with this optical imaging system, and wherein second adjust position and be configured to for the image being placed near the object of this optical imaging system is focused on this image plane;
Wherein:
This group optical lens comprises five lens;
This MEMS actuator is configured to reach 50 to 150 microns along the position of this optical axis for adjusting this first lens group;
This first optical lens group comprises biconvex thing side lens; And
The ratio of the combined focal length of the focal length of these biconvex thing side lens to these five lens is greater than 1/2nd.
2. optical imaging system according to claim 1, it more comprises the aperture diaphragm of the thing side that is placed in these biconvex thing side lens.
3. optical imaging system according to claim 2, wherein this aperture diaphragm is fixed on appropriate location along this optical axis.
4. optical imaging system according to claim 2, wherein this aperture diaphragm is fixed on appropriate location with respect to this first lens group.
5. optical imaging system according to claim 4, wherein this MEMS actuator is configured to for again put this first lens group and this aperture diaphragm along this optical axis, and the fixed position between this aperture diaphragm and this first lens group is at least maintained to this first adjustment position and this second adjustment position.
6. optical imaging system according to claim 1, this second lens combination comprises four lens elements, and it comprises the second lens, the 3rd lens, the 4th lens and the 5th lens.
7. optical imaging system according to claim 6, these second lens have recessed as side and be positioned at the smooth or weak convex curvature on thing side.
8. optical imaging system according to claim 7, these second lens have negative optics multiplying power and are made up of OKP4HT plastics.
9. optical imaging system according to claim 6, the 3rd lens have He Tuxiang side, recessed thing side, positive optics multiplying power and are made up of APEL5514ML glass.
10. optical imaging system according to claim 6, the 4th lens have protruding near this optical axis and turn the picture side of recessed thing side and attached convex curvature away from this optical axis.
11. optical imaging systems according to claim 10, the 4th lens have positive optics multiplying power near this optical axis, and there is little negative optics multiplying power, little positive optics multiplying power or without optics multiplying power away from this optical axis, and the 4th lens are made up of APEL5514ML plastics.
12. optical imaging systems according to claim 6, the 5th lens have recessed in turning protruding thing side and recessedly turn protruding picture side near this optical axis and away from this optical axis near this optical axis and away from this optical axis.
13. optical imaging systems according to claim 12, the 5th lens have large negative optics multiplying power and have positive optics multiplying power away from this optical axis near this optical axis, and the 5th lens are made up of APEL5514ML plastics.
14. optical imaging systems according to claim 1, these biconvex thing side lens are made up of APEL5514ML plastics.
15. optical imaging systems according to claim 1, wherein the optics multiplying power of these biconvex thing side lens is that this first adjusts the function along the distance of this optical axis between position and this second adjustment position at least partly.
16. optical imaging systems according to claim 1, wherein the ratio of the combined focal length of the focal length of these biconvex thing side lens to these five lens is approximately 3/4ths.
17. optical imaging systems according to claim 1, wherein the ratio of the combination optical multiplying power of the optics multiplying power of these biconvex thing side lens to these five lens is that this first adjusts the function along the distance of this optical axis between position and this second adjustment position at least partly.
18. optical imaging systems according to claim 1, wherein be placed in away from the object of this optical system and be placed in fact infinite point, and the object being wherein placed near this optical system is placed in fact the aperture diaphragm 10cm place from this optical imaging system.
19. 1 kinds of optical systems, it comprises:
Arrange along sharing optical axis the multiple optical elements that are used to form object real image, these optical elements comprise:
Have the first lens of positive diopter, with two surfaces, a surface is towards thing side, and another surface is towards picture side, and it has convex-shaped;
There are the second lens of negative diopter and meniscus shaped, with towards be convex-shaped thing side surface and towards the surface of picture side that is concave shape;
There is positive diopter and near this optical axis, be the 3rd lens of biconvex shape, and be concave surface towards the surface of this thing side away from this optical axis;
The 4th lens, with towards be concave shape thing side surface and towards the surface of picture side that is convex-shaped; And
The 5th lens, it has meniscus shaped and the convex-shaped away from this optical axis, this meniscus shaped with towards be convex-shaped thing side surface and towards near the surface of picture side that is concave shape this optical axis; And be configured to the actuator for move this first lens along this optical axis.
20. optical systems according to claim 19, wherein this motor is MEMS (micro electro mechanical system).
21. optical systems according to claim 19, wherein these second lens carry out most aberration correction to this optical system.
22. optical systems according to claim 19, it more comprises the aperture that is embedded in this first lens and moves with this first lens, and wherein this aperture has the degree of depth of 50 μ m.
23. optical systems according to claim 19, wherein the f-number of this optical system (F-number) is approximately 2.4.
24. optical systems according to claim 19, wherein one or many person of these lens is made of plastics.
25. optical systems according to claim 19, wherein the surface of these lens is aspheric surface shape.
26. optical systems according to claim 19, wherein the refractive index of these lens drops on approximately 1.5 to approximately 1.66 scope.
27. optical systems according to claim 19, wherein the moving range of this first lens is between approximately 0 μ m and approximately 100 μ m.
28. optical systems according to claim 19, wherein in order to focus on the amount of movement of object image and the positive diopter of this first lens is inversely proportional to.
29. optical systems according to claim 19, the main lateral chromatic aberration scope that wherein this optical system focuses on infinite point object is equal to or less than about 1 μ m.
30. optical systems according to claim 19, the main lateral chromatic aberration scope that wherein this optical system focuses on 10cm place object is equal to or less than about 4 μ m.
31. 1 kinds of optical imaging systems of arranging along optical axis, it comprises:
One group of optical lens, it comprises first lens group and the second lens combination, most of optical lens that wherein this second lens combination is fixed on appropriate location and comprises this group optical lens along this optical axis; And
Actuator, it is mechanically connected to this first lens group, and be configured to for adjusting the position of this first lens group along this optical axis, wherein the first adjustment position is configured to for being placed in, the image of the object away from this optical imaging system be focused on the image plane being associated with this optical imaging system, and wherein the second adjustment position is configured to for the image of the object that is placed in close this optical imaging system is focused on this image plane;
Wherein:
This group optical lens comprises five lens;
This actuator system is configured to reach 50 to 150 microns along the position of this optical axis for adjusting this first lens group;
This second optical lens comprises the thing side from this group optical lens in this group optical lens starts at the 3rd lens of sequence the 3rd, and the 3rd lens have the meniscus shaped that is convex surface towards the thing side of this group optical lens.
32. optical imaging systems according to claim 31, wherein this actuator comprises MEMS (micro electro mechanical system) (MEMS) actuator.
33. optical imaging systems according to claim 31, this first optical lens group comprises biconvex object lens, and it provides this group optical lens most positive optics multiplying power.
34. optical imaging systems according to claim 33, wherein these biconvex object lens have than also large positive diopter of the combination diopter of this group optical lens.
35. optical imaging systems according to claim 31, wherein the effective focal length of this group optical lens is between approximately 4.5 and approximately 5.0 centimetres.
36. optical imaging systems according to claim 31, wherein the ratio of the effective focal length of total track lenth to this optical system is between approximately 1.1 and approximately between 1.2.
37. optical imaging systems according to claim 31, wherein this first lens group comprises a single lens in this group optical lens.
38. according to the optical imaging system described in claim 37, the object lens that wherein this single lens is this optical system.
39. according to the optical imaging system described in claim 37, and wherein this second adjustment position focuses on the image of approximately 12.8 centimeters of object distance place objects on this image plane.
40. optical imaging systems according to claim 31, wherein from the thing side open numbering of this group optical lens, the distance in this group optical lens between the 3rd lens and the 4th lens is a maximum clearance between each optical lens in this group optical lens.
41. optical imaging systems according to claim 31, wherein from the thing side open numbering of this group optical lens, the distance in this group optical lens between the 4th lens and the 5th lens is a maximum clearance between each optical lens in this group optical lens.
42. optical imaging systems according to claim 31, it more comprises the thing side open numbering from this group optical lens, near the aperture diaphragm thing side of the first lens of this group optical lens.
43. according to the optical imaging system described in claim 42, and it more comprises the thing side open numbering from this group optical lens, between the second and the 3rd diaphragm between lens of this group optical lens.
44. according to the optical imaging system described in claim 43, and it more comprises the second diaphragm between the 3rd lens and the 4th lens of this group optical lens.
45. according to the optical imaging system described in claim 44, and it more comprises the 3rd diaphragm between the 4th lens and the 5th lens of this group optical lens.
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