CN110320642A - Image-taking device - Google Patents
Image-taking device Download PDFInfo
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- CN110320642A CN110320642A CN201910212362.XA CN201910212362A CN110320642A CN 110320642 A CN110320642 A CN 110320642A CN 201910212362 A CN201910212362 A CN 201910212362A CN 110320642 A CN110320642 A CN 110320642A
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- taking device
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/14—Vascular patterns
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
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- Theoretical Computer Science (AREA)
- Lenses (AREA)
Abstract
The present invention provides a kind of image-taking device, including by object side to image side along the cover board of optical axis sequential, the first lens, the second lens, the third lens and sensor.The quantity of lens is only three in image-taking device.Image-taking device meets: f/imgH < 0.45 and 2 < (OTL-d)/imgH < 9, and wherein f is the effective focal length of image-taking device, and imgH is the maximum image height of image-taking device, and OTL is distance of the determinand to imaging surface on optical axis, and d is the thickness of cover board.
Description
Technical field
The present invention relates to a kind of electronic device more particularly to a kind of image-taking devices.
Background technique
The biological recognition system of electronic device mostly uses greatly capacitance principle on the market now, though electronic device can be reduced
Volume, but complicated circuit structure causes cost of manufacture to remain high, thus cause production unit cost is higher to be not easy to popularize.Though at present
There are the biological recognition system (such as fingerprint recognition, personal recognition or hand vein recognition) using optical imaging concept, but existing light
Learning imaging system has that volume is excessive, and electronic device is made to be not easy micromation and slimming, thus reduces electronic device
Portability.Therefore, optical imaging system volume in electronic device how is reduced, while maintaining good optical image quality, is become
For the important goal of current industry research and development.
Summary of the invention
The present invention provides a kind of image-taking device, can realize and be thinned and maintain good quality of optical imaging simultaneously.
A kind of image-taking device of the invention includes by object side to image side along the cover board of optical axis sequential, the first lens,
Two lens, the third lens and sensor.The quantity of lens is only three in image-taking device.Image-taking device meets: f/imgH < 0.45
And 2 < (OTL-d)/imgH < 9, wherein f is the effective focal length of image-taking device, and imgH is the maximum image height of image-taking device,
OTL is distance of the determinand to imaging surface on optical axis, and d is the thickness of cover board.
In one embodiment of this invention, the refractive power of the first lens, the second lens and the third lens is sequentially negative, positive
And it is negative.First lens, the second lens and the third lens respectively have object side and an image side surface.The object side of first lens
Face, the image side surface of the first lens, the object side of the second lens, the image side surface of the second lens, the object side of the third lens and
The image side surface of three lens is all aspherical.Image-taking device further includes the aperture being set between the first lens and the second lens.
In one embodiment of this invention, image-taking device also meets (OTL-d) < 3.5mm.
In one embodiment of this invention, the refractive index of the first lens is N1, and the refractive index of the second lens is N2, and third is saturating
The refractive index of mirror is N3, and image-taking device also meets 4.5 < N1+N2+N3 < 5.4.
In one embodiment of this invention, the abbe number of the first lens is V1, and the abbe number of the second lens is V2, the
The abbe number of three lens is V3, and image-taking device also meets V1+V2+V3 < 75.
In one embodiment of this invention, the entrance pupil aperture of image-taking device be EPD, and image-taking device also meet f/EPD <
3.7。
In one embodiment of this invention, the focal length of the first lens is f1, and the focal length of the second lens is f2, the third lens
Focal length is f3, and image-taking device also meets
In one embodiment of this invention, the field angle of image-taking device be FOV, and image-taking device also meet 100 ° < FOV <
180°。
In one embodiment of this invention, the image side surface of the third lens to distance of the imaging surface on optical axis is greater than
0.29mm。
In one embodiment of this invention, image-taking device further includes the light source being arranged in below cover board, and the wavelength of light source
Between 400 nanometers to 600 nanometers.
In one embodiment of this invention, image-taking device further includes the infrared light light source being arranged in below display panel.
In one embodiment of this invention, cover board includes acupressure probe, display panel, touch-control display panel or above-mentioned at least two
A combination.
In one embodiment of this invention, display panel is fixed on carrier by fixing piece.
In one embodiment of this invention, fixing piece is sticky material.
In one embodiment of this invention, sticky material be filled between the first lens and the second lens, the second lens with
Between the third lens and between the third lens and sensor.
In one embodiment of this invention, sticky material be filled between display panel and the first lens, the first lens with
Between second lens, between the second lens and the third lens and between the third lens and sensor.
In one embodiment of this invention, sticky material be filled between display panel and the first lens, the first lens with
Between second lens, between the second lens and the third lens and between the third lens and sensor.
In one embodiment of this invention, carrier includes accommodating space, and package assembling is placed in accommodating space.
In one embodiment of this invention, carrier includes accommodating space, and it is empty that display panel and package assembling are placed in accommodating
In.
Based on above-mentioned, the beneficial effect of the image-taking device of the embodiment of the present invention is: passing through setting cover board and three
The optical parameter design of lens and arrangement, are more easily manufactured image-taking device, and still have while reducing thickness can gram
Take the optical property of aberration.Therefore, image-taking device can maintain good image quality while realizing slimming.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate appended attached drawing
It is described in detail below.
Detailed description of the invention
Fig. 1 is the schematic diagram according to a kind of image-taking device of the first embodiment of the present invention；
Fig. 2A to Fig. 2 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of first embodiment respectively；
Fig. 3 is the schematic diagram according to a kind of image-taking device of the second embodiment of the present invention；
Fig. 4 A to Fig. 4 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of second embodiment respectively；
Fig. 5 is the schematic diagram according to a kind of image-taking device of the third embodiment of the present invention；
Fig. 6 A to Fig. 6 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of 3rd embodiment respectively；
Fig. 7 is the schematic diagram according to a kind of image-taking device of the fourth embodiment of the present invention；
Fig. 8 A to Fig. 8 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of fourth embodiment respectively；
Fig. 9 is the schematic diagram according to a kind of image-taking device of the fifth embodiment of the present invention；
Figure 10 A to Figure 10 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of the 5th embodiment respectively；
Figure 11 is the schematic diagram according to a kind of image-taking device of the sixth embodiment of the present invention；
Figure 12 A to figure 12 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of sixth embodiment respectively.
[symbol description]
10: determinand；
100,100A, 100B, 100C, 100D, 100E: image-taking device；
101: cover board；
102: the first lens；
103: aperture；
104: the second lens；
105: the third lens；
106: sensor；
107: light source；
108: package assembling；
109: fixing piece；
110: support plate；
110s: accommodating space；
B1, B2: imaging beam；
B3: light beam；
D: thickness；
I: optical axis；
S, T: curve；
S1, S3, S5, S7: object side；
S2, S4, S6, S8: image side surface；
S9: imaging surface；
S10: surface.
Specific embodiment
The direction term being previously mentioned in embodiment, such as: on " " ", "lower", "front", "rear", "left", "right" etc., be only
With reference to the direction of attached drawing.Therefore, the direction term used and is not intended to limit the invention for illustrating.In the accompanying drawings, respectively
Attached drawing shows the usual property feature of method used in particular exemplary embodiment, structure and/or material.However, these
Attached drawing is not necessarily to be construed as defining or limiting the range or property covered by these example embodiments.For example, in order to clear
Chu Qijian, each film layer, the relative thickness in region and/or structure and position may zoom in or out.
In embodiments, the same or similar element will use the same or similar label, and repeat it is omitted.This
Outside, the feature in different example embodiments can be combined with each other in case of no collision, and according to this specification or claim
Made simple equivalent changes and modifications all still belong in the range of this patent covers.In addition, in this specification or claim
The terms such as " first " that refers to, " second " are only to name the element or the different embodiments of difference or model of discrete (discrete)
It encloses, and is not used to the quantitative upper limit of restriction element or lower limit, manufacturing sequence or the setting for being also not limited to element are suitable
Sequence.
In embodiments, each image-taking device is suitable for obtaining the biological characteristic of determinand.For example, when determinand is hand
When finger, biological characteristic can be fingerprint or vein.When determinand is palm, biological characteristic can be palmmprint.
Fig. 1 is the schematic diagram according to a kind of image-taking device of the first embodiment of the present invention.Fig. 1 is please referred to, it is of the invention
The image-taking device 100 of first embodiment include by object side to image side along the cover board 101 of optical axis I sequential, the first lens 102,
Aperture 103, the second lens 104, the third lens 105 and sensor 106.The object side is the place side of determinand 10, and institute
State the place side that image side is imaging surface S9.In this announcement, the sensing face of sensor 106 in imaging surface S9, that is, image-taking device 100.
Imaging beam (light beam of biological information being had, such as imaging beam B1 and imaging beam B2) from determinand 10 enters
When image-taking device 100, it can sequentially pass through cover board 101, the first lens 102, aperture 103, the second lens 104 and the third lens
105, it is then passed to the sense side (i.e. imaging surface S9) of sensor 106, and image is formed in imaging surface S9.
Cover board 101, the first lens 102, the second lens 104 and the third lens 105 respectively include object side (such as object side
S1, S3, S5, S7) and image side surface (such as image side surface S2, S4, S6, S8).The object side is towards object side (or determinand 10)
And the surface for allowing imaging beam to pass through, and the image side surface is towards image side (or imaging surface S9) and the table that allows imaging beam to pass through
Face.
Cover board 101 is suitable for protecting the element being located under it.In the present embodiment, cover board 101 is acupressure probe.Carrying out biology
When feature identifies, the object side S1 of cover board 101 is the surface that determinand 10 contacts.That is, determinand 10 contacts cover board 101
Object side S1, to carry out living things feature recognition.Acupressure probe may include light transmission or semi-transparent main body, with the transmitting of sharp imaging beam
To sensor 106.The main body may include glass plate, plastic plate or above-mentioned two combination, and but not limited to this.In addition, referring to
Pressing plate optionally includes decorative layer, and decorative layer is arranged on cover board 101, to hide the element for being not intended to be seen below.
In another embodiment, cover board 101 may include acupressure probe, display panel, touch-control display panel or above-mentioned at least two
A combination.For example, cover board 101 can be display panel, such as organic light emitting display panel, and but not limited to this.Substitution
Ground, cover board 101 can be touch-control display panel, such as with the organic light emitting display panel of multiple touch control electrodes.The multiple touching
Control electrode can be formed on the outer surface of organic light emitting display panel or be embedded in organic light emitting display panel, and multiple
Touch control electrode can be carrying out touch control detection from by way of perhaps mutual tolerance.Alternatively, cover board 101 can be acupressure probe and display surface
The combination of the combination of plate or acupressure probe and touch-control display panel.
In addition, when image-taking device 100 and liquid crystal display (including liquid crystal display panel and backlight module) are incorporated into one
When rising, cover board 101 be may be provided above liquid crystal display panel, alternatively, the opposite substrate in liquid crystal display panel can be used as capture
The cover board 101 of device 100.It can be formed in liquid crystal display to accommodate optical imaging system (including the first lens 102,
Two lens 104, the third lens 105 and sensor 106) aperture.Backlight module is located at below liquid crystal display panel, to provide
Illuminating bundle.To avoid the illuminating bundle from backlight module from being transferred directly to sensor 106, backlight module and optical imagery system
Light-shielding structure can be formed between system, to maintain ideal image quality.Multiple touchings can also be further set under above-mentioned framework
Electrode is controlled, to provide touch control detection function.
First lens 102 are suitable for expanding the field angle (Field Of View, FOV) of image-taking device 100, make image-taking device
100 sensor 106 can obtain bigger image range.In the present embodiment, the first lens 102 have negative refractive power.This
Outside, the object side S3 of the first lens 102 is concave surface at dipped beam axis, and the image side surface S4 of the first lens 102 is at dipped beam axis
Concave surface.First lens 102 can be made of plastic cement material, and to meet light-weighted demand, but not limited to this.
Aperture 103 is suitable for reducing stray light, to promote picture quality.In the present embodiment, the setting of aperture 103 is saturating first
Between mirror 102 and the second lens 104, helps to expand field angle, make image-taking device 100 that there is the advantage of wide-angle lens.
Second lens 104 are suitable for aberration caused by the first lens 102 of amendment, and help to reduce the generation of spherical aberration, with
Promote image quality.In the present embodiment, the second lens 104 have positive refractive power.In addition, the object side S5 of the second lens 104
It is convex surface at dipped beam axis, and the image side surface S6 of the second lens 104 is convex surface at dipped beam axis.Second lens 104 can be by plastic cement
Material is made, and to meet light-weighted demand, but not limited to this.
The third lens 105 are also suitable for correcting aberration, and help to reduce the generation of spherical aberration, to promote image quality.In addition,
Correct aberration jointly by multi-disc lens (such as the second lens 104 and the third lens 105), in addition to can effectively correct aberration it
Outside, the manufacture difficulty per a piece of lens for correcting aberration can also be reduced.In the present embodiment, the third lens 105 have negative
Refractive power.In addition, the object side S7 of the third lens 105 is concave surface at dipped beam axis, and the image side surface S8 of the third lens 105 is close
It is convex surface at optical axis.The third lens 105 can be made of plastic cement material, and to meet light-weighted demand, but not limited to this.At this
In the embodiment of any example of invention, infrared ray filtering material can be coated on the image side surface S8 of the third lens 105.Or
Person, settable infrared light filter layer (not shown) between the third lens 105 and the second lens 104.Alternatively, the third lens 105
It may be provided with an infrared light filter layer (not shown go out) between imaging surface S9.
Sensor 106 is suitable for receiving the imaging beam from determinand 10.In the present embodiment, sensor 106 can be such as
It is charge-coupled device (Charge-Coupled Device, CCD) or complementary metal oxide semiconductor
(Complementary Metal-Oxide-Semiconductor, CMOS), however the present invention is not limited.
In image-taking device 100, only the first lens 102, the second lens 104 and the third lens 105 have refractive power,
And the lens in image-taking device 100 with refractive power only have above-mentioned two panels.In other words, in image-taking device 100 lens quantity
Only three.
The detailed optical data of first embodiment are as shown in Table 1.
Table one
In Table 1:
F is the effective focal length (Effective Focal Length, EFL) of image-taking device 100；
Fno is the f-number (f-number) of image-taking device 100, i.e. f/EPD, wherein EPD is the entrance pupil of image-taking device 100
Aperture；
HFOV is the angle of half field-of view (Half Field Of View, HFOV) of image-taking device 100, the i.e. half of FOV；
ImgH is maximum image height (effective photosensitive area of sensor 106 i.e. in image-taking device 100 of image-taking device 100
The half of the catercorner length in domain).
" radius of curvature (mm) " is infinity, represents corresponding surface as plane.
" distance (mm) " expression is distance of the corresponding surface to next surface on optical axis I.For example, determinand 10
" distance (mm) " be 0, represent surface S10 of the determinand 10 towards cover board 101 to the object side S1 of cover board 101 on optical axis I
Distance be 0mm." distance (mm) " of the object side S1 of cover board 101 is 1.800, represents the object side S1 of cover board 101 to cover board
Distance of the 101 image side surface S2 on optical axis I is 1.800mm." distance (mm) " of the image side surface S8 of the third lens 105 be
0.565, distance of the imaging surface S9 of the image side surface S8 of the third lens 105 to sensor 106 on optical axis I is represented as 0.565mm.
The rest may be inferred for other fields, repeats no more in this.
In the present embodiment, the object side S3 of the first lens 102, the image side surface S4 of the first lens 102, the second lens 104
Object side S5, the image side surface S6 of the second lens 104, the object side S7 of the third lens 105, the third lens 105 image side surface S8
It is all aspherical.Aspherical defined according to formula (1):
In formula (1):
Y indicate aspherical on point and optical axis I vertical range；
Z indicates that (point for being Y apart from optical axis I on aspherical and is tangential on vertex on aspherical optical axis I for aspherical depth
Section, vertical range between the two)；
R indicates the radius of curvature at lens surface dipped beam axis；
K indicates conical surface coefficient (conic constant)；
aiIndicate the i-th rank asphericity coefficient.
The object side S3 of first lens 102, the image side surface S4 of the first lens 102, the object side S5 of the second lens 104,
The image side surface S8 of the image side surface S6 of two lens 104, the object side S7 of the third lens 105 and the third lens 105 are in formula (1)
Every asphericity coefficient it is as shown in Table 2.
Table two
Relationship in the image-taking device 100 of first embodiment between each important parameter is as shown in Table 3.
| Conditional | Numerical value |
| f/imgH | 0.3156 |
| N1+N2+N3 | 4.92 |
| OTL(mm) | 4.698 |
| d(mm) | 1.8 |
| OTL-d(mm) | 2.898 |
| (OTL-d)/imgH | 4.14 |
| V1+V2+V3 | 64.5 |
| |f/f1|+|f/f2|+|f/f3| | 1.147 |
| FOV (degree) | 136 |
Table three
In table three:
N1 is the refractive index of the first lens 102；
N2 is the refractive index of the second lens 104；
N3 is the refractive index of the third lens 105；
OTL is the object side S1 of distance and cover board 101 of the determinand 10 to imaging surface S9 on optical axis I to imaging surface
Distance of the S9 on optical axis I；
D is the thickness of cover board 101；
V1 is the abbe number of the first lens 102, and abbe number is alternatively referred to as Abbe number (Abbe number)；
V2 is the abbe number of the second lens 104；
V3 is the abbe number of the third lens 105；
F1 is the focal length of the first lens 102；
F2 is the focal length of the second lens 104；
F3 is the focal length of the third lens 105.
Fig. 2A to Fig. 2 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of first embodiment respectively.Fig. 2A, which is shown, to be worked as
When wavelength is 550nm, the curvature of field (field curvature) aberration in relation to the direction the sagitta of arc (sagittal) on imaging surface S9 and
The curvature of field aberration in the direction meridian (tangential), wherein the curvature of field aberration of sagitta of arc direction and meridian direction respectively with curve S and
Curve T is indicated.Fig. 2 B shows the distortion aberration (distortion when wavelength is 550nm, on imaging surface S9
aberration).Fig. 2 C shows longitudinal ball when wavelength is 550nm and pupil radius (pupil radius) is 0.0577mm
Poor (longitudinal spherical aberration).From Fig. 2A to Fig. 2, C can be seen that the image-taking device of first embodiment
100 can be obviously improved spherical aberration, effectively eliminate aberration and maintain distortion aberration in image quality requirement.Explanation first is real accordingly
The image-taking device 100 for applying example remains to provide good image quality while realizing slimming (OTL is reduced to 4.698mm).
According to different demands, image-taking device 100 can further comprise other elements/film layer, or omit the member in Fig. 1
Part/film layer.For example, image-taking device 100 can further comprise light source 107, to provide the light beam B3 of irradiation determinand 10.Light
Source 107 is arranged below cover board 101.In other words, light source 107, the first lens 102, aperture 103, the second lens 104, third
Lens 105 and sensor 106 are located at the same side of cover board 101.
Light source 107 can be visible light source.For example, the wavelength of light source 107 is between 400 nanometers to 600 nanometers,
But not limited to this.Alternatively, light source 107 can be non-visible light sources, such as infrared light light source.In another embodiment, when taking
When as device 100 equipped with display module, a part for the display beams that display module is issued can be used for biological characteristic knowledge
Not, the setting of light source 107 can so be omitted.It in another embodiment, can be by display surface when cover board 101 is display panel
The a part for the display beams that plate issues is used for living things feature recognition, can so omit the setting of light source 107.Further implementing
In example, when cover board 101 is display panel, light source 107 may be provided at the lower section of display panel, and light source 107 can be non-visible
Radiant, such as infrared light light source.
In the present embodiment, the first lens 102 of image-taking device 100, aperture 103, the second lens 104, the third lens
105, sensor 106 may make up package assembling 108.By the way that these component encapsulations, are facilitated to promote image-taking device 100 together
Convenience when assembled, and reduce the assembling required time.
In the present embodiment, it includes fixing piece 109 and carrier 110 that image-taking device 100 is also alternative.Fixing piece 109 is set
It is placed between package assembling 108 and support plate 110, package assembling 108 is fixed on carrier 110.For example, fixing piece
109 can be the knots such as glue materials or notch, helical structure such as photocuring adhesion glue, heat cure adhesion glue, silica resin
Structure, so that package assembling 108 is fixed on carrier 110 by fixing piece 109.In the present embodiment, fixing piece 109 can be further
It is set in package assembling 108.That is, fixing piece 109 can be between the first lens 102 and aperture 103, aperture 103
Between the second lens 104, between the second lens 104 and the third lens 105 and between the third lens 105 and sensor 106.
For example, the fixing piece 109 being set in package assembling 108 may, for example, be the sticky material being transparent, by first
Lens 102, aperture 103, the second lens 104, the third lens 105, sensor 106 are fixed together, and maintain it is original at
Image quality amount, wherein package assembling 108 is the material of light-permeable.
In another embodiment, when cover board 101 is display panel, display panel, the first lens 102, aperture 103, the
Two lens 104, the third lens 105, sensor 106 may make up package assembling.Fixing piece 109 can be located at display panel and first thoroughly
Between mirror 102, between the first lens 102 and aperture 103, between aperture 103 and the second lens 104, the second lens 104 and third
Between lens 105 and between the third lens 105 and sensor 106.
In the present embodiment, carrier 110 includes accommodating space 110s, and package assembling 108 can be placed in accommodating space 110s
It is interior.However, the shape of carrier 110 is not limited.For example, carrier 110 is also possible to the plate of plane, and package assembling
(including or do not include display panel including or do not include cover board 101) is fixed on carrier 110 by fixing piece 109.
Fig. 3 is the schematic diagram according to a kind of image-taking device of the second embodiment of the present invention.Referring to figure 3., second implements
The difference of the image-taking device 100 of the image-taking device 100A and Fig. 1 of example is: each optical data, asphericity coefficient and these lens
Between parameter it is more or less somewhat different.In addition, the object side S1 of the first lens 102 is saturating for convex surface and third at dipped beam axis
The image side surface S8 of mirror 105 is concave surface at dipped beam axis.
The detailed optical data of second embodiment are as shown in Table 4.
Table four
The every asphericity coefficient of the object side of each lens and image side surface in formula (1) such as table five in second embodiment
It is shown.
Table five
Relationship in second embodiment between each important parameter is as shown in Table 6.
| Conditional | Numerical value |
| f/imgH | 0.3806 |
| N1+N2+N3 | 4.92 |
| OTL(mm) | 4.733 |
| d(mm) | 1.8 |
| OTL-d(mm) | 2.933 |
| (OTL-d)/imgH | 4.313 |
| V1+V2+V3 | 64.5 |
| |f/f1|+|f/f2|+|f/f3| | 1.078 |
| FOV (degree) | 132 |
Table six
Fig. 4 A to Fig. 4 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of second embodiment respectively.Fig. 4 A, which is shown, to be worked as
When wavelength is 550nm, the curvature of field aberration of curvature of field aberration and meridian direction on imaging surface S9 in relation to sagitta of arc direction.Fig. 4 B is shown
Distortion aberration when wavelength is 550nm, on imaging surface S9.Fig. 4 C is shown when wavelength is 550nm and pupil radius is
Longitudinal spherical aberration when 0.0629mm.It can be seen that the image-taking device 100A of second embodiment can be obviously improved ball from Fig. 4 A to Fig. 4 C
Difference effectively eliminates aberration and maintains distortion aberration in image quality requirement.Illustrate the image-taking device of second embodiment accordingly
100A remains to provide good image quality while realizing slimming (OTL is reduced to 4.733mm).
Fig. 5 is the schematic diagram according to a kind of image-taking device of the third embodiment of the present invention.Referring to figure 5., third is implemented
The difference of the image-taking device 100 of the image-taking device 100B and Fig. 1 of example is: each optical data, asphericity coefficient and these lens
Between parameter it is more or less somewhat different.In addition, the object side S1 of the first lens 102 is saturating for convex surface and third at dipped beam axis
The image side surface S8 of mirror 105 is concave surface at dipped beam axis.
The detailed optical data of 3rd embodiment are as shown in Table 7.
Table seven
The every asphericity coefficient of the object side of each lens and image side surface in formula (1) such as table eight in 3rd embodiment
It is shown.
Table eight
Relationship in 3rd embodiment between each important parameter is as shown in Table 9.
| Conditional | Numerical value |
| f/imgH | 0.4037 |
| N1+N2+N3 | 4.92 |
| OTL(mm) | 4.394 |
| d(mm) | 1.8 |
| OTL-d(mm) | 2.594 |
| (OTL-d)/imgH | 4.804 |
| V1+V2+V3 | 64.5 |
| |f/f1|+|f/f2|+|f/f3| | 1.174 |
| FOV (degree) | 136 |
Table nine
Fig. 6 A to Fig. 6 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of 3rd embodiment respectively.Fig. 6 A, which is shown, to be worked as
When wavelength is 550nm, the curvature of field aberration of curvature of field aberration and meridian direction on imaging surface S9 in relation to sagitta of arc direction.Fig. 6 B is shown
Distortion aberration when wavelength is 550nm, on imaging surface S9.Fig. 6 C is shown when wavelength is 550nm and pupil radius is
Longitudinal spherical aberration when 0.0422mm.It can be seen that the image-taking device 100B of 3rd embodiment can be obviously improved ball from Fig. 6 A to Fig. 6 C
Difference effectively eliminates aberration and maintains distortion aberration in image quality requirement.Illustrate the image-taking device of 3rd embodiment accordingly
100B remains to provide good image quality while realizing slimming (OTL is reduced to 4.394mm).
Fig. 7 is the schematic diagram according to a kind of image-taking device of the fourth embodiment of the present invention.Fig. 7 is please referred to, the 4th implements
The difference of the image-taking device 100 of the image-taking device 100C and Fig. 1 of example is: each optical data, asphericity coefficient and these lens
Between parameter it is more or less somewhat different.In addition, the object side S1 of the first lens 102 is saturating for convex surface and third at dipped beam axis
The image side surface S8 of mirror 105 is concave surface at dipped beam axis.
The detailed optical data of fourth embodiment are as shown in Table 10.
Table ten
The every asphericity coefficient of the object side of each lens and image side surface in formula (1) such as table ten in fourth embodiment
Shown in one.
Table 11
Relationship in fourth embodiment between each important parameter is as shown in table 12.
| Conditional | Numerical value |
| f/imgH | 0.4227 |
| N1+N2+N3 | 4.92 |
| OTL(mm) | 4.704 |
| d(mm) | 1.8 |
| OTL-d(mm) | 2.904 |
| (OTL-d)/imgH | 6.6 |
| V1+V2+V3 | 64.5 |
| |f/f1|+|f/f2|+|f/f3| | 1.102 |
| FOV (degree) | 136 |
Table 12
Fig. 8 A to Fig. 8 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of fourth embodiment respectively.Fig. 8 A, which is shown, to be worked as
When wavelength is 550nm, the curvature of field aberration of curvature of field aberration and meridian direction on imaging surface S9 in relation to sagitta of arc direction.Fig. 8 B is shown
Distortion aberration when wavelength is 550nm, on imaging surface S9.Fig. 8 C is shown when wavelength is 550nm and pupil radius is
Longitudinal spherical aberration when 0.039mm.From Fig. 8 A to Fig. 8 C can be seen that fourth embodiment image-taking device 100C can be obviously improved spherical aberration,
It effectively eliminates aberration and maintains distortion aberration in image quality requirement.Illustrate the image-taking device 100C of fourth embodiment accordingly
It remains to provide good image quality while being thinned (OTL is reduced to 4.704mm) realizing.
Fig. 9 is the schematic diagram according to a kind of image-taking device of the fifth embodiment of the present invention.Fig. 9 is please referred to, the 5th implements
The difference of the image-taking device 100 of the image-taking device 100D and Fig. 1 of example is: each optical data, asphericity coefficient and these lens
Between parameter it is more or less somewhat different.In addition, the object side S1 of the first lens 102 is convex surface at dipped beam axis.
The detailed optical data of 5th embodiment are as shown in table 13.
Table 13
The every asphericity coefficient of the object side of each lens and image side surface in formula (1) such as table ten in 5th embodiment
Shown in four.
Table 14
Relationship in 5th embodiment between each important parameter is as shown in table 15.
| Conditional | Numerical value |
| f/imgH | 0.3713 |
| N1+N2+N3 | 4.92 |
| OTL(mm) | 4.457 |
| d(mm) | 1.8 |
| OTL-d(mm) | 2.657 |
| (OTL-d)/imgH | 3.796 |
| V1+V2+V3 | 64.5 |
| |f/f1|+|f/f2|+|f/f3| | 0.962 |
| FOV (degree) | 136 |
Table 15
Figure 10 A to Figure 10 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of the 5th embodiment respectively.Figure 10 A shows
Out when wavelength is 550nm, the curvature of field aberration of curvature of field aberration and meridian direction on imaging surface S9 in relation to sagitta of arc direction.Figure
10B shows the distortion aberration when wavelength is 550nm, on imaging surface S9.Figure 10 C is shown when wavelength is 550nm and pupil half
Longitudinal spherical aberration when diameter is 0.0585mm.It can be seen that the image-taking device 100D of the 5th embodiment can obviously change from Figure 10 A to Figure 10 C
Kind spherical aberration effectively eliminates aberration and maintains distortion aberration in image quality requirement.Illustrate the capture of the 5th embodiment accordingly
Device 100D remains to provide good image quality while realizing slimming (OTL is reduced to 4.457mm).
Figure 11 is the schematic diagram according to a kind of image-taking device of the sixth embodiment of the present invention.Figure 11 is please referred to, the 6th is real
The difference for applying the image-taking device 100 of the image-taking device 100E and Fig. 1 of example is: each optical data, asphericity coefficient and these thoroughly
Parameter between mirror is more or less somewhat different.In addition, the object side S1 of the first lens 102 is convex surface at dipped beam axis.
The detailed optical data of sixth embodiment are as shown in table 16.
Table 16
The every asphericity coefficient of the object side of each lens and image side surface in formula (1) such as table ten in sixth embodiment
Shown in seven.
Table 17
Relationship in sixth embodiment between each important parameter is as shown in table 18.
| Conditional | Numerical value |
| f/imgH | 0.42456 |
| N1+N2+N3 | 4.86 |
| OTL(mm) | 4.716 |
| d(mm) | 1.8 |
| OTL-d(mm) | 2.916 |
| (OTL-d)/imgH | 5.116 |
| V1+V2+V3 | 64.5 |
| |f/f1|+|f/f2|+|f/f3| | 1.061 |
| FOV (degree) | 136 |
Table 18
Figure 12 A to figure 12 C is the longitudinal spherical aberration and items aberration diagram of the image-taking device of sixth embodiment respectively.Figure 12 A shows
Out when wavelength is 550nm, the curvature of field aberration of curvature of field aberration and meridian direction on imaging surface S9 in relation to sagitta of arc direction.Figure
12B shows the distortion aberration when wavelength is 550nm, on imaging surface S9.Figure 12 C is shown when wavelength is 550nm and pupil half
Longitudinal spherical aberration when diameter is 0.0481mm.It can be seen that the image-taking device 100E of sixth embodiment can obviously change from figure 12 A to figure 12 C
Kind spherical aberration effectively eliminates aberration and maintains distortion aberration in image quality requirement.Illustrate the capture of sixth embodiment accordingly
Device 100E remains to provide good image quality while realizing slimming (OTL is reduced to 4.716mm).
In various embodiments of the present invention, while difficulty, manufacturing cost, integral thickness and the imaging of manufacture being considered
Quality, the wherein at least one of formula, can there is preferable setting if the following conditions are met.
f/imgH<0.45；
4.5<N1+N2+N3<5.4；
2<(OTL-d)/imgH<9；
Fno < 3.7 or f/EPD < 3.7；
(OTL-d)<3.5mm；
V1+V2+V3<75；
0.7<|f/f1|+|f/f2|+|f/f3|<1.7；
100 degree < FOV < 180 degree；And
Distance of the image side surface S8 to imaging surface S9 of the third lens 105 on optical axis I is greater than 0.29mm.
Specifically, by meeting f/imgH < 0.45, facilitate the light beam for collecting wide-angle, image-taking device is enable to exist
Bigger image range is obtained in short distance.By satisfaction 4.5 < N1+N2+N3 < 5.4, facilitate the volume for reducing image-taking device,
To realize slimming.By meet 2 < (OTL-d)/imgH < 9 and (OTL-d) < 3.5mm at least one of them, it can be achieved that
Slimming.By meeting Fno < 3.7 or f/EPD < 3.7, there can be biggish aperture.In this way, in the environment of insufficient light,
There can be good imaging effect.By meeting V1+V2+V3 < 75, help to correct color difference.By meet 0.7 < | f/f1 |+|
F/f2 |+| f/f3 | < 1.7, in addition to can effectively correct aberration, it can also reduce the susceptibility of optical system.By meet 100 degree <
FOV < 180 degree can get required imaging range, and can suitably control distortion degree.
Meet its of the above conditions under framework of the invention in view of the unpredictability of Optical System Design
At least one of can it is preferable that the thickness of image-taking device reduces, can with aperture increase, image quality promoted or assemble yield mention
The shortcomings that rising and improving the prior art.
In conclusion the image-taking device of the embodiment of the present invention have the advantages that following effect and one at least within:
One, the light beam reflected by determinand is intercepted compared to by two panels lens below, obtains quilt by three pieces lens
The light beam of determinand reflection helps to correct aberration and reduces the manufacture difficulty of lens.
Two, the object side of three pieces lens and image side surface all use aspherical design, help to reduce aberration.
Three, the image-taking device of three pieces lens may help to collect the light beam of wide-angle, and then it is a wide range of to enable image-taking device receive
Image.In addition, it also facilitates to reduce determinand at a distance from aligning device, the volume of image-taking device is effectively reduced, and it is real
Now it is thinned.
Four, the image side surface of the third lens to distance of the imaging surface on optical axis is greater than 0.29mm.It whereby, can be in the third lens
Setting member/film layer, such as filter element on demand between imaging surface, but not limited to this.
Five, aperture is optionally set, to reduce stray light, to promote picture quality.In one embodiment, pass through
Aperture is arranged between the first lens and the second lens, helps to expand field angle, makes image-taking device that there is wide-angle lens
Advantage.
Six, the longitudinal spherical aberration of various embodiments of the present invention, the curvature of field, distortion all meet operating specification.
Seven, in aforementioned listed exemplary qualifications formula, the numberical range within maximum/minimum all can be accordingly
Implement.Also the exemplary qualifications formula that can optionally merge unequal number amount is applied in embodiments of the present invention.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (30)
1. a kind of image-taking device, which is characterized in that including display panel and package assembling, the package assembling includes negative diopter
The first lens, the second lens of positive diopter, the third lens of negative diopter, sensor, wherein the display panel, described
First lens, second lens, the third lens, the sensor are by object side to image side along optical axis sequential.
2. a kind of image-taking device, which is characterized in that including display panel, package assembling, carrier and fixing piece, the package assembling
The first lens, the second lens of positive diopter, the third lens of negative diopter, sensor including negative diopter, wherein described
Display panel, first lens, second lens, the third lens, the sensor are by object side to image side along optical axis
Sequential, the carrier carry the package assembling, and the fixing piece is fixed on the carrier by the package assembling.
3. image-taking device according to claim 2, which is characterized in that the display panel is fixed on institute by the fixing piece
It states on carrier.
4. image-taking device according to claim 2, which is characterized in that the fixing piece is sticky material.
5. image-taking device according to claim 4, which is characterized in that the sticky material be filled in first lens with
Between second lens, between second lens and the third lens and the third lens and the sensor it
Between.
6. image-taking device according to claim 3, which is characterized in that the fixing piece is sticky material.
7. image-taking device according to claim 6, which is characterized in that the sticky material be filled in the display panel with
Between first lens, between first lens and second lens, second lens and the third lens it
Between and the third lens and the sensor between.
8. according to image-taking device described in claim 2,4 or 5, which is characterized in that the carrier includes accommodating space, the envelope
Arrangement accommodates in the accommodating space.
9. according to image-taking device described in claim 3,6 or 7, which is characterized in that the carrier includes accommodating space, described aobvious
Show panel and package assembling accommodating in the accommodating space.
10. image-taking device according to claim 1-4, which is characterized in that the image-taking device meets:
f/imgH<0.45；And
2 < (OTL-d)/imgH < 9,
Wherein f is the effective focal length of the image-taking device, and imgH is the maximum image height of the image-taking device, and OTL is to be measured
Distance of the object to imaging surface on the optical axis, d are the thickness of the display panel.
11. image-taking device according to claim 1-4, which is characterized in that first lens, described second are thoroughly
Mirror and the third lens respectively have object side and image side surface, and the object side of first lens, described first are thoroughly
The image side surface of mirror, the object side of second lens, the image side surface of second lens, the third lens
The object side and the image side surfaces of the third lens be all aspherical, and the image-taking device further include:
Aperture is set between first lens and second lens.
12. image-taking device according to claim 1-4, which is characterized in that the image-taking device also meets:
(OTL-d) < 3.5mm,
Wherein OTL is distance of the determinand to imaging surface on the optical axis, and d is the thickness of the display panel.
13. image-taking device according to claim 1-4, which is characterized in that the refractive index of first lens is
N1, the refractive index of second lens are N2, and the refractive index of the third lens is N3, and the image-taking device also meets:
4.5<N1+N2+N3<5.4。
14. image-taking device according to claim 1-4, which is characterized in that the abbe number of first lens
For V1, the abbe number of second lens is V2, and the abbe number of the third lens is V3, and the image-taking device is also full
Foot:
V1+V2+V3<75。
15. image-taking device according to claim 1-4, which is characterized in that the effective focal length of the image-taking device
Entrance pupil aperture for f, the image-taking device is EPD, and the image-taking device also meets:
f/EPD<3.7。
16. image-taking device according to claim 1-4, which is characterized in that the effective focal length of the image-taking device
For f, the focal length of first lens is f1, and the focal length of second lens is f2, and the focal length of the third lens is f3, and institute
Image-taking device is stated also to meet:
17. image-taking device according to claim 1-4, which is characterized in that the field angle of the image-taking device is
FOV, and the image-taking device also meets:
100°<FOV<180°。
18. image-taking device according to claim 1-4, which is characterized in that the image side surface of the third lens is extremely
Distance of the imaging surface on the optical axis is greater than 0.29mm.
19. image-taking device according to claim 1-4, which is characterized in that further include:
Infrared light light source is arranged below the display panel.
20. a kind of image-taking device, which is characterized in that including by object side to image side along the cover board of optical axis sequential, the first lens,
Second lens, the third lens and sensor, wherein the quantity of lens is only three in the image-taking device, and the image-taking device
Meet:
f/imgH<0.45；And
2 < (OTL-d)/imgH < 9,
Wherein f is the effective focal length of the image-taking device, and imgH is the maximum image height of the image-taking device, and OTL is to be measured
Distance of the object to imaging surface on the optical axis, d are the thickness of the cover board.
21. image-taking device according to claim 20, which is characterized in that first lens, second lens and
The refractive power of the third lens be sequentially it is negative, positive and negative, first lens, second lens and the third are saturating
Mirror respectively has object side and image side surface, the object side of first lens, the image side surface of first lens, institute
State the object side of the second lens, the image side surface of second lens, the third lens the object side and
The image side surface of the third lens is all aspherical, and the image-taking device further include:
Aperture is set between first lens and second lens.
22. image-taking device according to claim 20, which is characterized in that also meet:
(OTL-d)<3.5mm。
23. image-taking device according to claim 20, which is characterized in that the refractive index of first lens is N1, described
The refractive index of second lens is N2, and the refractive index of the third lens is N3, and the image-taking device also meets:
4.5<N1+N2+N3<5.4。
24. image-taking device according to claim 20, which is characterized in that the abbe number of first lens is V1, institute
The abbe number for stating the second lens is V2, and the abbe number of the third lens is V3, and the image-taking device also meets:
V1+V2+V3<75。
25. image-taking device according to claim 20, which is characterized in that the entrance pupil aperture of the image-taking device is EPD, and
The image-taking device also meets:
f/EPD<3.7。
26. image-taking device according to claim 20, which is characterized in that the focal length of first lens is f1, described the
The focal length of two lens is f2, and the focal length of the third lens is f3, and the image-taking device also meets:
27. image-taking device according to claim 20, which is characterized in that the field angle of the image-taking device is FOV, and institute
Image-taking device is stated also to meet:
100°<FOV<180°。
28. image-taking device according to claim 20, which is characterized in that the image side surface of the third lens is to described
Distance of the imaging surface on the optical axis is greater than 0.29mm.
29. image-taking device according to claim 20, which is characterized in that further include:
Light source is arranged below the cover board, and the wavelength of the light source is between 400 nanometers to 600 nanometers.
30. image-taking device according to claim 20, which is characterized in that the cover board includes acupressure probe, display panel, touching
Control the combination of display panel or above-mentioned at least two.
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| US16/527,071 US20200049955A1 (en) | 2018-08-07 | 2019-07-31 | Image capturing apparatus |
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| US15/942,441 US10216978B2 (en) | 2014-08-26 | 2018-03-31 | Fingerprint identification device and fingerprint identification method |
| US201862715294P | 2018-08-07 | 2018-08-07 | |
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| CN113156609A (en) * | 2020-01-07 | 2021-07-23 | 新巨科技股份有限公司 | Three-piece thin imaging lens group |
| US11106009B2 (en) | 2018-12-03 | 2021-08-31 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing unit and electronic device |
| CN114384673A (en) * | 2022-03-24 | 2022-04-22 | 江西联益光学有限公司 | Wide-angle lens and imaging apparatus |
| US11385440B2 (en) | 2019-04-10 | 2022-07-12 | Largan Precision Co., Ltd. | Optical photographing lens assembly, fingerprint identification module and electronic device |
| CN114879349A (en) * | 2022-06-02 | 2022-08-09 | 业泓科技(成都)有限公司 | Optical image capturing lens assembly |
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| CN112132114A (en) * | 2020-06-07 | 2020-12-25 | 神盾股份有限公司 | Electronic device |
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| US11106009B2 (en) | 2018-12-03 | 2021-08-31 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing unit and electronic device |
| US11668906B2 (en) | 2018-12-03 | 2023-06-06 | Largan Precision Co., Ltd. | Optical imaging lens assembly, image capturing unit and electronic device |
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| TWI704386B (en) | 2020-09-11 |
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