CN107664811A - Eyeglass module - Google Patents
Eyeglass module Download PDFInfo
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- CN107664811A CN107664811A CN201710802381.9A CN201710802381A CN107664811A CN 107664811 A CN107664811 A CN 107664811A CN 201710802381 A CN201710802381 A CN 201710802381A CN 107664811 A CN107664811 A CN 107664811A
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- eyeglass
- module
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Classifications
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
-
- 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
Abstract
The present invention relates to a kind of eyeglass module, including laterally it is imaged from object the first eyeglass, the second eyeglass, the 3rd eyeglass, the 4th eyeglass and the 5th eyeglass of side arranged in sequence；First eyeglass has a positive refracting power, including the side of the object of convex and convex into image side surface；Second eyeglass has negative index；3rd eyeglass has a negative index, including the side of the object of convex and spill into image side surface；4th eyeglass has positive refracting power；5th eyeglass has negative index.
Description
Technical field
The present invention relates to a kind of eyeglass module, is more specifically related to a kind of race glass being made up of five eyeglasses
Piece module.
Background technology
In recent years, generally numerical camera mould is integrally disposed upon in the host devices such as mobile phone, computer, and consumed
Person is constantly increasing to the demand of this integrated device.For the camera module being arranged on portable mobile communication terminal machine,
Usually require that it is high performance compact camera.
Such compact camera generally comprises eyeglass module and image-forming component.Eyeglass module includes multiple eyeglasses, and forming can profit
The optical system of object images is obtained with image-forming component, above-mentioned image-forming component can apply charge coupling device (CCD：Charged
Coupled Device) etc. element.
With the trend that mobile communication terminal is thinned and minimized, short to total length, focal length length telescope lens module
Demand be also continuously increased.Therefore, it is necessary to develop high-resolution, the eyeglass module of low f-number (F Number).
The content of the invention
It is an object of the present invention to solve the above problems, provide a kind of small-sized by being used as of forming of five eyeglasses
The eyeglass module that telescope lens use.
A kind of eyeglass module, including laterally it is imaged from object the first eyeglass, the second eyeglass, the 3rd mirror of side arranged in sequence
Piece, the 4th eyeglass and the 5th eyeglass；First eyeglass has a positive refracting power, including the side of the object of convex and convex into
Image side surface；
Second eyeglass has negative index；3rd eyeglass has negative index, includes the side of the object of convex
With spill into image side surface；4th eyeglass has positive refracting power；5th eyeglass has negative index；First mirror
Distance TTL of the piece side of the object to imaging surface along optical axis and first eyeglass focal length f1 meet：TTL/2<f1.
In one of the embodiments, the focal length f of the eyeglass module and first eyeglass focal length f1 meet：0.4<
f1/f<0.6。
The focal length f1 of the first eyeglass and focal length f of whole eyeglass module ratio then can not fully gather if less than 0.4
Collect light to ensure desired light path；If greater than 0.6, then clearly image can not be obtained because aberration becomes greatly.
In one of the embodiments, the radius of curvature R 1 of the side of the object of first eyeglass and first eyeglass
Radius of curvature R 2 into image side surface meets：-1.5<(R1-R2)/(R1+R2)<-0.5.
When the radius of curvature of first eyeglass meets above-mentioned condition, the performance of whole eyeglass module can be optimized, while most
Optimize the thickness and size of the first eyeglass.
In one of the embodiments, the radius of curvature R 3 of the side of the object of second eyeglass and second eyeglass
Radius of curvature R 4 into image side surface meets：0.5<(R3-R4)/(R3+R4)<1.5.
When the radius of curvature of second eyeglass meets above-mentioned condition, the aberration that can not only optimize whole eyeglass module is special
Property, the refractive index and size of the second eyeglass can also be optimized.
In one of the embodiments, the focal length f3 of the 3rd eyeglass and first eyeglass focal length f1 meet：-
4.0<f3/f1<-3.0。
When the focal length of 3rd eyeglass meets above-mentioned condition, it can also be obtained with long-focus even with five eyeglasses
Telescope lens, it is hereby achieved that small-sized high-resolution eyeglass.
In one of the embodiments, the Abbe number V1 of first eyeglass and the 3rd eyeglass Abbe number V3 expire
Foot：V1+V3>100.
Abbe number is to determine the condition of eyeglass module material, when only meeting above-mentioned condition, can just optimize whole mirror
The aberration characteristic of piece module, particularly chromatic aberration characteristic.
In one of the embodiments, the focal length f4 of the 4th eyeglass and the 5th eyeglass focal length f5 meet：-
4.0<f4/f5<-0.5。
In eyeglass module, when the focal length ratio of the 4th eyeglass and the 5th eyeglass meets above-mentioned condition, it can minimize whole
The total length of individual eyeglass module, and the telescope lens with long-focus can be obtained.
In one of the embodiments, the Abbe number V5 of the 5th eyeglass meets：V5<30.When the Abbe of the 5th eyeglass
When number is less than above-mentioned higher limit, difficulty during manufacture high index of refraction eyeglass can be reduced.
In one of the embodiments, the refractive index N5 of the 5th eyeglass meets N5>1.6.
By setting high index of refraction eyeglass, it is possible to reduce the quantity of eyeglass, the distance between eyeglass is reduced, so as to contribute to
The miniaturization of eyeglass module.
In one of the embodiments, first eyeglass, the second eyeglass, the 3rd eyeglass, the 4th eyeglass, the 5th eyeglass edge
Thickness L1, L2, L3, L4, L5 of optical axis and the distance TTL along optical axis of the first eyeglass side of the object to imaging surface meet：
(L1+L2+L3+L4+L5)/TTL>0.43。
(L1+L2+L3+L4+L5)/TTL represents the ratio in the total length of whole eyeglass module shared by the thickness of each eyeglass
Example.When increasing the ratio shared by eyeglass in the total length of whole eyeglass module, it is possible to reduce the gap between eyeglass, realize whole
The miniaturization of eyeglass module.
In one of the embodiments, it is provided with aperture in the side of the object of first eyeglass.
By adjusting the position of aperture, accurate, clearly image can be obtained.
The present invention can provide to be made up of and can be as the eyeglass module that race glass piece uses five eyeglasses.
Also, the present invention can provide f-number below 2.2, focal length more than 5.0mm high-performance, high-resolution
Eyeglass module.
Brief description of the drawings
Fig. 1 is the structure chart of the eyeglass module provided according to the first embodiment of the present invention；
Fig. 2 is the modulation transfer function (MTF of the eyeglass module in the first embodiment shown in Fig. 1：Modulation
Transfer Function) figure；
Fig. 3 is the aberration figure of the eyeglass module in the first embodiment shown in Fig. 1；
Fig. 4 is the structure chart of the eyeglass module provided according to the second embodiment of the present invention；
Fig. 5 is the MTF figures of the eyeglass module in the second embodiment shown in Fig. 4；
Fig. 6 is the aberration figure of the eyeglass module in the second embodiment shown in Fig. 4；
Fig. 7 is the structure chart of the eyeglass module according to the third embodiment of the invention provided；
Fig. 8 is the MTF figures of the eyeglass module in the 3rd embodiment shown in Fig. 7；
Fig. 9 is the aberration figure of the eyeglass module in the 3rd embodiment shown in Fig. 7.
Embodiment
Embodiments of the invention can have a variety of changes, can there is a variety of different embodiments, detailed below in conjunction with accompanying drawing
Describe bright embodiments of the invention in detail.But the present invention is not limited to the scope that following embodiments limit, should also include being included in recording
Item and technical scope in all deformations, equivalent and sub.When being illustrated to embodiments of the invention, meeting
Omit the explanation that the common knowledge obscured is produced to the goal of the invention of the present invention.
The present invention is not limited to following embodiments, as an example, shown in Fig. 1, Fig. 4 and Fig. 7 first, second with
And the eyeglass module in 3rd embodiment.Below based on Fig. 1 first embodiment, the present invention will be described, however, to each mirror
The structure of piece and the explanation of feature are also applied for other embodiment.That is, the present invention is not limited to the description below, can be according to specific
Application conditions enter line translation.
As shown in figure 1, according to the first embodiment of the present invention, eyeglass module includes laterally being imaged side arranged in sequence from object
The first eyeglass (11), the second eyeglass (12), the 3rd eyeglass (13), the 4th eyeglass (14) and the 5th eyeglass (15).
The eyeglass module of the present invention can include the imaging optical system being made up of five eyeglasses.That is, eyeglass module can be by
First to the 5th eyeglass is formed.However, eyeglass module is not limited to the situation for only including five eyeglasses, can also wrap as needed
Include other composed components.For example, as shown in figure 1, eyeglass module can also include the object side direction for being located at the first eyeglass (11)
Aperture, the optical filter (IF) to imaging side direction arranged in sequence and imaging surface including imaging sensor can also be included
(IP)。
Therefore, the image of object is by the first eyeglass (11), the second eyeglass (12), the 3rd eyeglass (13), the 4th eyeglass
(14) and after the 5th eyeglass (15) it is incident on the imaging surface provided with imaging sensor (IP).Described image sensor can wrap
Solid imaging device is included, such as charge coupled cell (CCD：Charged Coupled Device) and CMOS partly lead
Body (CMOS：Complementary Metal-Oxide Semiconductor), but be not limited thereto, it can also use
The other kinds imaging sensor used in the art.
First eyeglass (11), the second eyeglass (12), the 3rd eyeglass (13), the 4th eyeglass (14) and the 5th eyeglass
(15) can be made up of plastic material or glass material.
In addition, the first eyeglass (11), the second eyeglass (12), the 3rd eyeglass (13), the 4th eyeglass (14) and the 5th eyeglass
(15) more than one eyeglass in can be aspherical lens.In one of embodiment of the present invention, the first eyeglass (11),
Second eyeglass (12), the 3rd eyeglass (13), the 4th eyeglass (14) and the 5th eyeglass (15) can be entirely aspherical lens.
The high image quality eyeglass module that focal length is long, aberration characteristic is outstanding can be provided whereby.
Hereafter will be by specific embodiment, structure and effect to the eyeglass module of the present invention carry out more detailed
Explanation.
In one of embodiment of the present invention, first eyeglass (11) has positive refracting power, and has convex
Side of the object (11a) and convex into image side surface (11b).First eyeglass (11) plays aggregation from object in eyeglass module
The effect of the light come is penetrated in side, and then can effectively control the optical path length of whole eyeglass module.
In one of embodiment of the present invention, first eyeglass (11) meets following【Formula 1】.
【Formula 1】 TTL/2<f1
Understand that TTL is from the side of the object (11a) of the first eyeglass (11) to imaging surface (IP) along optical axis (X) with reference to figure 1
Distance, f1 is the focal length of first eyeglass (11).TTL is the optics overall length of eyeglass module, and f1 value of the value than TTL/2 is more
Greatly.When f1 value is smaller than TTL/2 value, it is not easy to ensure desired light path, therefore should meet above-mentioned【Formula 1】.
First eyeglass (11) can also meet following【Formula 2】.
【Formula 2】 0.4<f1/f<0.6
Wherein, f is the focal length of eyeglass module, and f1 is the focal length of first eyeglass (11).The focal length of first eyeglass (11)
The focal length f of f1 and whole eyeglass module (i.e. optical system) ratio, can between 0.4 to 0.6, if less than 0.4, then without
Method fully assembles light to ensure desired light path, if greater than 0.6, then be able to can not be obtained clearly because aberration becomes greatly
Image.
First eyeglass (11) can also meet following【Formula 3】.
【Formula 3】 -1.5<(R1-R2)/(R1+R2)<-0.5
Wherein, R1 is the radius of curvature of the side of the object (11a) of the first eyeglass (11), and R2 is the imaging of the first eyeglass (11)
The radius of curvature of side (11b).The radius of curvature into image side surface (11b) of first eyeglass (11) is bigger, the first eyeglass (11)
Radius of curvature meets above-mentioned【Formula 3】When, the performance of whole eyeglass module can be optimized, while optimize the first eyeglass (11)
Thickness and size.
In one of embodiment of the present invention, second eyeglass (12) has negative index, and has convex
Side of the object (12a) and spill into image side surface (12b).Second eyeglass (12) can be corrected caused by the first eyeglass (11) place
Aberration.
In one of embodiment of the present invention, second eyeglass (12) can meet following【Formula 4】.
【Formula 4】 0.5<(R3-R4)/(R3+R4)<1.5
Wherein, R3 is the radius of curvature of the side of the object (12a) of the second eyeglass (12), and R4 is the imaging of the second eyeglass (12)
The radius of curvature of side (12b).When the radius of curvature of second eyeglass (12) meets above-mentioned condition, whole mirror can be not only optimized
The aberration characteristic of piece module, the refractive index and size of the second eyeglass (12) can also be optimized.
In one of embodiment of the present invention, the 3rd eyeglass (13) has negative index, and has convex
Side of the object (13a) and spill into image side surface (13b).3rd eyeglass (13) can have the folding bigger than the second eyeglass (12)
Rate is penetrated, can be corrected in aberration caused by the first eyeglass (11) and the second eyeglass (12) place.
In one of embodiment of the present invention, the 3rd eyeglass (13) can meet following【Formula 5】.
【Formula 5】 -4.0<f3/f1<-3.0
Wherein, f3 is the focal length of the 3rd eyeglass (13), and f1 is the focal length of the first eyeglass (11).The focal length of 3rd eyeglass (13)
When characteristic meets above-mentioned condition, the telescope lens with long-focus can also be obtained even with five eyeglasses, so as to obtain
Obtain small-sized high-resolution eyeglass.
3rd eyeglass (13) can also meet following【Formula 6】.
【Formula 6】 V1+V3>100
Wherein, V1 is the Abbe number of the first eyeglass (11), and V3 is the Abbe number of the 3rd eyeglass (13).Abbe number is to determine mirror
The condition of piece module material, when only meeting above-mentioned condition, the aberration characteristic of whole eyeglass module can be just optimized, particularly
Chromatic aberration characteristic.
In one of embodiment of the present invention, the 4th eyeglass (14) has positive refracting power, and has convex
Side of the object (14a) and convex into image side surface (14b), the 5th eyeglass (15) has a negative index, and with convex
Side of the object (15a) and spill into image side surface (15b).The side of the object (14a) of 4th eyeglass (14) and into image side surface (14b)
Can have from optical axis (X) skew pre-determined distance the point of inflection (i.e. flex point), the side of the object (15a) of the 5th eyeglass (15) and into
Image side surface (15b) can have the point of inflection from optical axis (X) skew pre-determined distance, can also include being located at into image side surface (15b)
And to the part being centrally recessed into of optical axis (X).
In one of embodiment of the present invention, the 4th eyeglass (14) and the 5th eyeglass (15) can meet following【It is public
Formula 7】.
【Formula 7】 -4.0<f4/f5<-0.5
Wherein, f4 is the focal length of the 4th eyeglass (14), and f5 is the focal length of the 5th eyeglass (15).In eyeglass module, the 4th
When the focal length ratio of eyeglass (14) and the 5th eyeglass (15) meets above-mentioned condition, the total length of whole eyeglass module can be minimized,
And the telescope lens with long-focus can be obtained.
5th eyeglass (15) can also meet following【Formula 8】.
【Formula 8】 V5<30
Wherein, V5 is the Abbe number of the 5th eyeglass (15), when it is less than above-mentioned higher limit, can reduce the high refraction of manufacture
Difficulty during rate eyeglass.
In addition, the 5th eyeglass (15) can also meet it is following【Formula 9】.
【Formula 9】 N5>1.6
Wherein, N5 is the refractive index of the 5th eyeglass (15).When the 5th eyeglass meets above-mentioned Abbe number and refractive index condition,
Even if manufacturing high index of refraction eyeglass, also because the manufacturing tolerance of eyeglass is smaller, and then the fraction defective of product can be reduced, pass through setting
High index of refraction eyeglass, it is possible to reduce the quantity of eyeglass, the distance between eyeglass is reduced, so as to contribute to the small-sized of eyeglass module
Change.
In one of embodiment of the present invention, eyeglass module can meet following【Formula 10】.
【Formula 10】 (L1+L2+L3+L4+L5)/TTL>0.43
Wherein, L1, L2, L3, L4 and L5 are the first eyeglass (11), the second eyeglass (12), the 3rd eyeglass (13), respectively
The thickness of four eyeglasses (14) and the 5th eyeglass (15) along optical axis (X), TTL are the side of the object (11a) from the first eyeglass (11)
To the distance along optical axis (X) of imaging surface (IP).
It is above-mentioned【Formula 10】Represent the ratio in the total length of whole eyeglass module shared by the thickness of each eyeglass.Whole
When increasing the ratio shared by eyeglass in the total length of eyeglass module, it is possible to reduce the gap between eyeglass, realize whole eyeglass module
Miniaturization.I.e., it is possible to provide small-sized telescope lens module.
In addition, aperture (S) can be located in the side of the object (11a) of first eyeglass (11), so as to prevent from outer
The interference of the light in portion, and make the distance between eyeglass module and imaging sensor elongated.
Based on said structure, in one of embodiment of the present invention, it is possible to achieve small-sized prestige of the focal length in more than 5mm
Remote eyeglass module.Also, by optimizing aberration characteristic, the image of clear image quality of the f-number below 2.2 can be obtained.Also
Small-sized eyeglass module of the optics overall length in below 5.5mm can be provided.
What is used in each of the embodiments described below is aspherical, has by known【Formula 11】The conic section of acquisition
(Conic) constant (K) and asphericity coefficient (A, B, C, D, E, F, G, H, J) represent.It is following numeral in, " E with and subsequent number
Word " represents 10 power.Such as in one embodiment, E-05 represents 10-5。
【Formula 11】
Z：From eyeglass summit to the distance of optical axis direction；
R：Along the distance perpendicular to optical axis direction
α：The inverse (α=1/radius) of radius of curvature on the summit of eyeglass；
K：Conic constant；
A、B、C、D、E、F、G、H、J：Asphericity coefficient.
【Embodiment 1】
【Table 1】Extremely【Table 3】The number of the eyeglass module as shown in Figure 1 provided according to the first embodiment of the present invention is provided
According to.Eyeglass module in first embodiment includes the first eyeglass (11), the second eyeglass (12), the 3rd eyeglass (13), the 4th eyeglass
(14) and the 5th eyeglass (15), the side of the object (11a) of the first eyeglass (11) is provided with aperture (S), and to eyeglass module
Imaging side direction be provided with arranged in sequence optical filter (IF) and imaging surface (IP).
Following face numberings refer to the numbering in the face of each eyeglass shown in Fig. 1.【Table 1】In, * represents aspherical,【Table 2】Show
Conic constant and asphericity coefficient of first eyeglass (11) to the 5th eyeglass (15).
In the following description, radius of curvature (R), thickness (t), the unit of focal length (f) are mm.
【Table 1】
| Number in face | Radius of curvature (R) | Thickness (t) | Refractive index (Nd) | Abbe number (Vd) | Remarks |
| Object | ∞ | ∞ | |||
| * 11a | 1.63391 | 0.99000 | 1.5441 | 56.1 | First eyeglass |
| * 11b | -38.37525 | 0.04641 | |||
| * 12a | 183.96492 | 0.29602 | 1.66 | 20.4 | Second eyeglass |
| * 12b | 4.11444 | 0.20470 | |||
| * 13a | 2.42863 | 0.26188 | 1.5441 | 56.1 | 3rd eyeglass |
| * 13b | 1.60379 | 1.28740 | |||
| * 14a | 15.68400 | 0.41000 | 1.66 | 20.4 | 4th eyeglass |
| * 14b | -1090.25770 | 0.56177 | |||
| * 15a | 42.04216 | 0.50000 | 1.651 | 21.5 | 5th eyeglass |
| * 15b | 3.98563 | 0.11712 | |||
| IFa | ∞ | 0.21 | 1.5167 | 64.2 | IR optical filters |
| IFb | ∞ | 0.595 | |||
| IP | ∞ | 0.00000 | Image |
【Table 2】
【Table 3】
| f | 5.75 | TTL/2 | 2.74 |
| f1 | 2.89 | N5 | 1.65 |
| f2 | -6.30 | V5 | 21.50 |
| f3 | -9.74 | f1/f | 0.50 |
| f4 | 23.13 | f3/f1 | -3.36 |
| f5 | -6.90 | (V1+V3) | 112.20 |
| fno | 2.20 | f4/f5 | -3.35 |
| TTL | 5.48 | (R1-R2)/(R1+R2) | -1.09 |
| 2y | 5.00 | (R3-R4)/(R3+R4) | 0.96 |
| (L1+L2+L3+L4+L5)/TTL | 0.45 |
Understood with reference to figure 1, first eyeglass (11) has a positive refracting power, and the side of the object (11a) including convex and
Convex into image side surface (11b).Second eyeglass (12) has a negative index, and the side of the object (12a) including convex and
Spill into image side surface (12b).3rd eyeglass (13) has a negative index, and the side of the object (13a) including convex and
Spill into image side surface (13b).4th eyeglass (14) has a positive refracting power, and the side of the object (14a) including convex and
Convex into image side surface (14b).5th eyeglass (15) has a negative index, and the side of the object (15a) including convex and
Spill into image side surface (15b).
In the eyeglass module of above-mentioned first embodiment, f-number is 2.20, and focal length is 5.75mm, the total length of eyeglass module
It is 5.48mm.With reference to【Table 3】Understand, the eyeglass module in above-mentioned first embodiment can meet above-mentioned【Formula 1】Extremely【Formula
10】。
That is, according to the first embodiment of the present invention, it is possible to achieve focal length exists in more than 5.0mm, optics overall length
The high-resolution race glass piece module of below 5.5mm, f-number below 2.2.
Fig. 2 is the MTF figures of the eyeglass module in first embodiment, and it includes image being divided into multiple section Bing Yige areas
Between for unit draw MTF figures.With the spatial frequency increase in each section, response can be declined with more slow slope.
In first embodiment, relative to final spatial frequency, response maximum have dropped 0.3 or so, therefore can obtain more clear
Clear image.
In addition, Fig. 3 shows spherical aberration, astigmatism and the figure for distorting aberration of the eyeglass module in first embodiment
Shape.Understood by reference to Fig. 3, according to the first embodiment of the present invention, can provide various aberration characteristics all outstanding eyeglass mould
Group.
In summary, according to above-mentioned first embodiment, the small-sized of clear image quality that provide that can provide long-focus is looked in the distance
Eyeglass module.
【Embodiment 2】
【Table 4】Extremely【Table 6】The number of the eyeglass module provided according to the second embodiment of the present invention as shown in Figure 4 is provided
According to.Eyeglass module in second embodiment includes the first eyeglass (21), the second eyeglass (22), the 3rd eyeglass (23), the 4th eyeglass
(24) and the 5th eyeglass (25), the imaging side direction to eyeglass module are provided with optical filter (IF) and the imaging of arranged in sequence
Face (IP).Also, aperture (S) is provided with the side of the object (21a) of the first eyeglass (21).
Following face numberings refer to the numbering in the face of each eyeglass shown in Fig. 4.【Table 4】In, * represents aspherical,【Table 5】Show
Conic constant and asphericity coefficient of first eyeglass (21) to the 5th eyeglass (25).
In the following description, radius of curvature (R), thickness (t), the unit of focal length (f) are mm.
【Table 4】
| Number in face | Radius of curvature (R) | Thickness (t) | Refractive index (Nd) | Abbe number (Vd) | Remarks |
| Object | ∞ | ∞ | |||
| * 21a | 1.66432 | 0.88243 | 1.5441 | 56.1 | First eyeglass |
| * 21b | 171.44131 | 0.12460 | |||
| * 22a | -128.85689 | 0.35469 | 1.66 | 20.4 | Second eyeglass |
| * 22b | 3.96687 | 0.14955 | |||
| * 23a | 2.38360 | 0.41488 | 1.5441 | 56.1 | 3rd eyeglass |
| * 23b | 1.60264 | 0.86106 | |||
| * 24a | -19.08233 | 0.36483 | 1.62 | 24.1 | 4th eyeglass |
| * 24b | -4.20563 | 0.73558 | |||
| * 25a | 2.66646 | 0.33363 | 1.603 | 27.5 | 5th eyeglass |
| * 25b | 1.61100 | 0.41981 | |||
| IFa | ∞ | 0.21 | 1.5167 | 64.2 | IR optical filters |
| IFb | ∞ | 0.595 | |||
| IP | ∞ | 0.00000 | Image |
【Table 5】
【Table 6】
| f | 5.26 | TTL/2 | 2.67 |
| f1 | 3.07 | N5 | 1.60 |
| f2 | -5.75 | V5 | 27.50 |
| f3 | -11.08 | f1/f | 0.58 |
| f4 | 8.47 | f3/f1 | -3.61 |
| f5 | -7.60 | (V1+V3) | 112.20 |
| fno | 2.15 | f4/f5 | -1.11 |
| TTL | 5.34 | (R1-R2)/(R1+R2) | -0.98 |
| 2y | 5.00 | (R3-R4)/(R3+R4) | 1.06 |
| (L1+L2+L3+L4+L5)/TTL | 0.44 |
Understood with reference to figure 4, first eyeglass (21) has a positive refracting power, and the side of the object (21a) including convex and
Spill into image side surface (21b).Second eyeglass (22) has a negative index, and the side of the object (22a) including spill and
Spill into image side surface (22b).3rd eyeglass (23) has a negative index, and the side of the object (23a) including convex and
Spill into image side surface (23b).4th eyeglass (24) has a positive refracting power, and the side of the object (24a) including spill and
Convex into image side surface (24b).5th eyeglass (25) has a negative index, and the side of the object (25a) including convex and
Spill into image side surface (25b).
In the eyeglass module of above-mentioned second embodiment, f-number is 2.15, and focal length is 5.26mm, the total length of eyeglass module
It is 5.34mm.With reference to【Table 6】Understand, the eyeglass module in above-mentioned second embodiment can meet above-mentioned【Formula 1】Extremely【Formula
10】。
That is, according to the second embodiment of the present invention, it is possible to achieve focal length exists in more than 5.0mm, optics overall length
The high-resolution race glass piece module of below 5.5mm, f-number below 2.2.
Fig. 5 is the MTF figures of the eyeglass module in second embodiment, and it includes image being divided into multiple section Bing Yige areas
Between for unit draw MTF figures.With the spatial frequency increase in each section, response can be declined with more slow slope.
In second embodiment, relative to final spatial frequency, response maximum have dropped 0.4 or so, therefore can obtain more clear
Clear image.
In addition, Fig. 6 shows spherical aberration, astigmatism and the figure for distorting aberration of the eyeglass module in second embodiment
Shape.Understood by reference to Fig. 6, according to the second embodiment of the present invention, can provide various aberration characteristics all outstanding eyeglass mould
Group.
In summary, according to above-mentioned second embodiment, high-resolution race glass piece module can be provided.
【Embodiment 3】
【Table 7】Extremely【Table 9】The number of the eyeglass module according to the third embodiment of the invention provided as shown in Figure 7 is provided
According to.Eyeglass module in 3rd embodiment includes the first eyeglass (31), the second eyeglass (32), the 3rd eyeglass (33), the 4th eyeglass
(34) and the 5th eyeglass (35), the imaging side direction to eyeglass module are provided with optical filter (IF) and the imaging of arranged in sequence
Face (IP).Also, aperture (S) is provided with the side of the object (31a) of the first eyeglass (31).
Following face numberings refer to the numbering in the face of each eyeglass shown in Fig. 7.【Table 7】In, * represents aspherical,【Table 8】Show
Conic constant and asphericity coefficient of first eyeglass (31) to the 5th eyeglass (35).
In the following description, radius of curvature (R), thickness (t), the unit of focal length (f) are mm.
【Table 7】
| Number in face | Radius of curvature (R) | Thickness (t) | Refractive index (Nd) | Abbe number (Vd) | Remarks |
| Object | ∞ | ∞ | |||
| * 31a | 1.56801 | 1.01417 | 1.5441 | 56.1 | First eyeglass |
| * 31b | -80.20023 | 0.03000 | |||
| * 32a | 42.61668 | 0.29913 | 1.66 | 20.4 | Second eyeglass |
| * 32b | 3.75822 | 0.19101 | |||
| * 33a | 2.47002 | 0.25000 | 1.5441 | 56.1 | 3rd eyeglass |
| * 33b | 1.57068 | 1.20880 | |||
| * 34a | 76.85534 | 0.43741 | 1.66 | 20.4 | 4th eyeglass |
| * 34b | -10.50664 | 0.73245 | |||
| * 35a | -26.08019 | 0.37304 | 1.612 | 26.2 | 5th eyeglass |
| * 35b | 3.23122 | 0.06401 | |||
| IFa | ∞ | 0.21 | 1.5167 | 64.2 | IR optical filters |
| IFb | ∞ | 0.595 | |||
| IP | ∞ | 0.00000 | Image |
【Table 8】
【Table 9】
| f | 5.64 | TTL/2 | 2.65 |
| f1 | 2.83 | N5 | 1.61 |
| f2 | -6.18 | V5 | 26.20 |
| f3 | -8.76 | f1/f | 0.50 |
| f4 | 13.85 | f3/f1 | -3.10 |
| f5 | -4.63 | (V1+V3) | 112.20 |
| fno | 2.20 | f4/f5 | -2.99 |
| TTL | 5.30 | (R1-R2)/(R1+R2) | -1.04 |
| 2y | 5.00 | (R3-R4)/(R3+R4) | 0.84 |
| (L1+L2+L3+L4+L5)/TTL | 0.45 |
Understood with reference to figure 7, first eyeglass (31) has a positive refracting power, and the side of the object (31a) including convex and
Convex into image side surface (31b).Second eyeglass (32) has a negative index, and the side of the object (32a) including convex and
Spill into image side surface (32b).3rd eyeglass (33) has a negative index, and the side of the object (33a) including convex and
Spill into image side surface (33b).4th eyeglass (34) has a positive refracting power, and the side of the object (34a) including convex and
Convex into image side surface (34b).5th eyeglass (35) has a negative index, and the side of the object (35a) including spill and
Spill into image side surface (35b).
In the eyeglass module of above-mentioned 3rd embodiment, f-number is 2.20, and the total focal length of eyeglass module is 5.64mm, mirror
The total length of piece module is 5.30mm.With reference to【Table 9】Understand, the eyeglass module in above-mentioned 3rd embodiment can meet above-mentioned【It is public
Formula 1】Extremely【Formula 10】.
That is, according to the third embodiment of the invention, it is possible to achieve focal length exists in more than 5.0mm, optics overall length
The high-resolution race glass piece module of below 5.5mm, f-number below 2.2.
Fig. 8 is the MTF figures of the eyeglass module in 3rd embodiment, and it includes image being divided into multiple section Bing Yige areas
Between for unit draw MTF figures.With the spatial frequency increase in each section, response can be declined with more slow slope.
In 3rd embodiment, relative to final spatial frequency, response maximum have dropped 0.3 or so, therefore can obtain more clear
Clear image.
In addition, Fig. 9 shows spherical aberration, astigmatism and the figure for distorting aberration of the eyeglass module in 3rd embodiment
Shape.Understood by reference to Fig. 9, according to the third embodiment of the invention, can provide various aberration characteristics all outstanding eyeglass mould
Group.
In summary, according to above-mentioned 3rd embodiment, the race glass piece module that can obtain clear image quality can be provided.
Claims (11)
1. a kind of eyeglass module, including be laterally imaged from object the first eyeglass of side arranged in sequence, the second eyeglass, the 3rd eyeglass,
4th eyeglass and the 5th eyeglass；
First eyeglass has a positive refracting power, including the side of the object of convex and convex into image side surface；
Second eyeglass has negative index；
3rd eyeglass has a negative index, including the side of the object of convex and spill into image side surface；
4th eyeglass has positive refracting power；
5th eyeglass has negative index；
Characterized in that, distance TTL of the first eyeglass side of the object to imaging surface along optical axis and first eyeglass
Focal length f1 meets：TTL/2<f1.
2. eyeglass module according to claim 1, it is characterised in that the focal length f of the eyeglass module and first mirror
The focal length f1 of piece meets：0.4<f1/f<0.6.
3. eyeglass module according to claim 1, it is characterised in that the radius of curvature of the side of the object of first eyeglass
R1 and first eyeglass radius of curvature R 2 into image side surface meet：-1.5<(R1-R2)/(R1+R2)<-0.5.
4. eyeglass module according to claim 1, it is characterised in that the radius of curvature of the side of the object of second eyeglass
R3 and second eyeglass radius of curvature R 4 into image side surface meet：0.5<(R3-R4)/(R3+R4)<1.5.
5. eyeglass module according to claim 1, it is characterised in that the focal length f3 of the 3rd eyeglass and first mirror
The focal length f1 of piece meets：-4.0<f3/f1<-3.0.
6. eyeglass module according to claim 1, it is characterised in that the Abbe number V1 of first eyeglass and the described 3rd
The Abbe number V3 of eyeglass meets：V1+V3>100.
7. eyeglass module according to claim 1, it is characterised in that the focal length f4 of the 4th eyeglass and the 5th mirror
The focal length f5 of piece meets：-4.0<f4/f5<-0.5.
8. eyeglass module according to claim 1, it is characterised in that the Abbe number V5 of the 5th eyeglass meets：V5<
30。
9. eyeglass module according to claim 1, it is characterised in that the refractive index N5 of the 5th eyeglass meets：N5>
1.6。
10. eyeglass module according to claim 1, it is characterised in that first eyeglass, the second eyeglass, the 3rd eyeglass,
4th eyeglass, thickness L1, L2, L3, L4, the L5 of the 5th eyeglass along optical axis and the first eyeglass side of the object to the edge of imaging surface
The distance TTL of optical axis meets：(L1+L2+L3+L4+L5)/TTL>0.43.
11. eyeglass module according to claim 1, it is characterised in that：
Aperture is provided with the side of the object of first eyeglass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802381.9A CN107664811A (en) | 2017-09-07 | 2017-09-07 | Eyeglass module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802381.9A CN107664811A (en) | 2017-09-07 | 2017-09-07 | Eyeglass module |
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ID=61098331
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