CN208937801U - A kind of miniaturization object space telecentric optical system - Google Patents
A kind of miniaturization object space telecentric optical system Download PDFInfo
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- CN208937801U CN208937801U CN201821648889.4U CN201821648889U CN208937801U CN 208937801 U CN208937801 U CN 208937801U CN 201821648889 U CN201821648889 U CN 201821648889U CN 208937801 U CN208937801 U CN 208937801U
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Abstract
The utility model describes a kind of miniaturization object space telecentric optical system, including the first lens, the second lens, the third lens, the 4th lens, the 5th lens, aperture diaphragm, the 6th lens being arranged successively along object plane on as plane propagation direction in light, wherein first lens, the second lens, the third lens, the 4th lens, the 5th lens constitute preceding group of positive light coke, and the 6th lens constitute rear group of positive light coke.First lens use bent moon positive power lens using bent moon negative-power lenses, the 6th lens using bent moon positive power lens, the 5th lens using bent moon negative-power lenses, the 4th lens using biconvex positive power lens, the third lens using biconvex positive power lens, the second lens.The utility model has carried out innovative design, reduces telecentricity and alleviates the weight and size of optical system while enhancing detects imaging effect.
Description
Technical field
The utility model relates to optical field more particularly to a kind of miniaturization object space telecentric optical systems.
Background technique
Object space telecentric optical system is used for industrial detection, can obtain the imaging effect of the depth of field insensitive to image-forming range, wide
Fruit can correct the image disparity of conventional lenses.There are many object space telecentric optical systems to be applied to PCB circuit board, hand at present
In the detection of all types of industries such as machine product, ceramic element, high-precision spring, light transmission class product and Precision Machinery Elements.But it is existing
Many object space telecentric optical systems detection imaging effect it is not ideal enough, that there are marginal distortions is larger, telecentricity is larger especially
It is weight and larger-size problem.
Utility model content
For deficiency existing for existing object space telecentric optical system, it is remote that the utility model provides a kind of miniaturization object space
Feel concerned about system.
To achieve the above objectives, the utility model adopts the following technical solution:
A kind of miniaturization object space telecentric optical system, including successively arranged along object plane on as plane propagation direction in light
The first lens, the second lens, the third lens, the 4th lens, the 5th lens, aperture diaphragm, the 6th lens of column；
First lens, the second lens, the third lens, the 4th lens, the 5th lens constitute preceding group of positive light coke, institute
State rear group that the 6th lens constitute positive light coke；
If total focal power of the optical system is φ, first lens to the 6th power of lens are followed successively by
φ 1 to φ 6, then 1/ φ=0.727 of φ, 3/ φ of φ 2/ φ=0.774, φ=5/ φ of -0.845, φ 4/ φ=0.909, φ=-
0.314, φ 6/ φ=1.409.
Further, second lens and the third lens form double agglutination lens group.
Further, first lens using biconvex positive power lens, the second lens using biconvex positive power lens,
The third lens are negative using bent moon using bent moon positive power lens, the 5th lens using bent moon negative-power lenses, the 4th lens
Power lenses, the 6th lens use bent moon positive power lens.
Further, the first lens front surface radius of curvature be 11.657mm, rear surface radius of curvature be-
107.392mm, center thickness 4.69mm, lens clear aperture are φ 38.0mm；The second lens front surface radius of curvature
For 53.269mm, rear surface radius of curvature is -92.503mm, and center thickness 6.05mm, lens clear aperture is φ 36.0mm；
The third lens front surface radius of curvature is -92.503mm, and rear surface radius of curvature is 382.56mm, and center thickness is
1.5mm, lens clear aperture are φ 35.2mm；The 4th lens front surface radius of curvature is 30.106mm, rear surface curvature
Radius is 70.089mm, and center thickness 4.75mm, lens clear aperture is φ 31.2mm；The 5th lens front surface curvature
Radius is 61.1mm, and rear surface radius of curvature is 14.822mm, and center thickness 9.99mm, lens clear aperture is φ
18.8mm；6th lens front surface radius of curvature is -63.298mm, and rear surface radius of curvature is -41.297mm, and center thickness is
3.98mm, lens clear aperture are φ 34.4mm.
Further, first lens are made of dense flint glass material, second lens are using fluor crown material
Material is made, the third lens are made of dense flint glass material, the 4th lens are made of dense crown material, institute
State that the 5th lens are made of dense flint glass material, the 6th lens are made of dense flint glass material.
The utility model has the beneficial effect that:
The utility model is compact-sized, in identical imaging viewing field, imaging multiplying power, numerical aperture and object space operating distance
The overall length of existing optical system generally requires 200mm or more under index, and this system only 165mm is advantageously implemented optical system
Small light and low cost；
The lens numbers of the utility model optical system are few, focal power distribution rationally, the processing of lens and build-up tolerance compared with
Low, manufacturability degree is high, is conducive to save manufacturing cost；
The object space telecentricity of the utility model is no more than 0.01 °, and full filed distortion is no more than 0.001%, has fabulous
Telecentricity, extremely low distortion and the image quality close to diffraction limit can obtain micron-sized measurement accuracy, and image fault degree
It substantially reduces, improves detection accuracy.
Detailed description of the invention
Fig. 1 is the composed structure schematic diagram of the utility model optical system；
Fig. 2 is the utility model optical system optical transfer function curve graph at 30lp/mm；
Fig. 3 is the utility model optical system optical transfer function curve graph at 60lp/mm；
Fig. 4 is the distortion figure of the utility model optical system；
Fig. 5 is the illumination figure of the utility model optical system.
Specific embodiment
The essence that the utility model is more fully understood for convenience of those of ordinary skill in the art, with reference to the accompanying drawing to this reality
It is described in detail with novel specific embodiment.
In conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of miniaturization object space telecentric optical system, a kind of miniaturization object space
Telecentric optical system, the first lens 3, second including being arranged successively along object plane 1 on as 2 direction of propagation of plane in light are saturating
Mirror 4, the third lens 5, the 4th lens 6, the 5th lens 7, aperture diaphragm 8, the 6th lens 9；
Before first lens 3, the second lens 4, the third lens 5, the 4th lens 6, the 5th lens 7 constitute positive light coke
Group, the 6th lens 9 constitute rear group of positive light coke.
Second lens 4 and the third lens 5 form double agglutination lens group.
First lens 3 use biconvex positive power lens, third using biconvex positive power lens, the second lens 4
Lens 5 use the negative light of bent moon using bent moon positive power lens, the 5th lens 7 using bent moon negative-power lenses, the 4th lens 6
Focal power thick lens, the 6th lens 9 use bent moon positive power lens.
In the present embodiment, each lens sizes are as follows: 3 front surface radius of curvature of the first lens is 11.657mm, rear surface
Radius of curvature is -107.392mm, and center thickness 4.69mm, lens clear aperture is φ 38.0mm；Before second lens 4
Surface curvature radius is 53.269mm, and rear surface radius of curvature is -92.503mm, center thickness 6.05mm, lens light admission port
Diameter is φ 36.0mm；The 5 front surface radius of curvature of the third lens is -92.503mm, and rear surface radius of curvature is 382.56mm,
Center thickness is 1.5mm, and lens clear aperture is φ 35.2mm；4th lens, the 6 front surface radius of curvature is 30.106mm,
Rear surface radius of curvature is 70.089mm, and center thickness 4.75mm, lens clear aperture is φ 31.2mm；5th lens
7 front surface radius of curvature are 61.1mm, and rear surface radius of curvature is 14.822mm, center thickness 9.99mm, lens light admission port
Diameter is φ 18.8mm；6th lens, 9 front surface radius of curvature is -63.298mm, and rear surface radius of curvature is -41.297mm, in
For the heart with a thickness of 3.98mm, lens clear aperture is φ 34.4mm.
In the present embodiment, each lens making material is as follows: the first lens 3 are made using dense flint glass material, are described
Second lens 4 are made of fluor crown material, the third lens 5 are made of dense flint glass material, the described 4th thoroughly
Mirror 6 is made of dense crown material, the 5th lens 7 are made of dense flint glass material, the 6th lens 9 use
Dense flint glass material is made.
If total focal power of optical system is φ, the first lens to the 6th power of lens are followed successively by 1~φ of φ 6, then
3/ φ of φ 1/ φ=0.727, φ 2/ φ=0.774, φ=- 0.845, φ 4/ φ=0.909, φ 5/ φ=- 0.314, φ 6/
φ=1.409.
In the present embodiment, each lens placement position relationship are as follows: the first lens 3 are 0.9mm at a distance from the second lens 4；The
Three lens 5 are 0.2mm at a distance from the 4th lens 6；4th lens 6 are 11.66mm at a distance from the 5th lens 7；5th lens 7
With at a distance from aperture diaphragm 8 be 8.95mm；Aperture diaphragm 8 is 57.11mm at a distance from the 6th lens 9, the 6th lens 9 with as flat
The distance in face 2 is 55.0mm.
Optical system described in the utility model belongs to object space telecentric beam path, and the angle of chief ray and optical axis is no more than 0.01 °.
And as shown in Figure 2, the optical transfer function value of all visual fields of optical system has been more than 0.6 in 30lp/mm.
From the figure 3, it may be seen that the optical transfer function value of all visual fields of optical system has been more than 0.45 in 60lp/mm.It is close
Diffraction limit, image quality are good.
As seen from Figure 4, within the scope of image space 44mm, distortion is no more than 0.001%, close to zero, effectively keeps away
Measurement error caused by distorting is exempted from.
As seen from Figure 5, within the scope of image space 44mm, relative illumination is better than 97.8%, full filed Illumination Distribution
Uniformly, the decline of measurement accuracy caused by differences of illumination intensities is avoided.
The present embodiment, the optical system technical indicator achieved being made up of said lens are as follows:
Object-side numerical aperture: 0.08；
Object space imaging size: 22mm；
Object space operating distance: 100mm；
Enlargement ratio: 2.0；
Optics relative distortion :≤0.001%；
Image space imaging size: 44mm；
Object space telecentricity :≤0.01 °；
Optics overall length :≤165mm；
Relative illumination: >=97.8%.
In the example of the utility model, object space telecentricity is no more than 0.01 °, and the design of object space telecentricity can effectively solve to have an X-rayed
The problem of image fault.The fabulous object space telecentricity design result of the camera lens illustrates that the chief ray that object plane is imaged will in parallel and light
Axis, no matter object plane is located at where, all will not influence optical system to the imaging multiplying power of object height.That is, image space with
The multiplying power of object space is constant, provides the good ability for eliminating vision difference for camera lens.In addition, the full filed of this optical system
Distortion is no more than 0.001%, is much better than identical detection viewing field in the market and detects the optical system of multiplying power, eliminates distortion and cause
Measurement error, improve the measurement accuracy of optical system.By the optical index of above-mentioned camera lens it is known that the utility model light
The overall length of system only 165mm, and reach nearly diffraction limit image quality only with 6 lens, it is same with existing object space telecentricity
The camera lens of index is compared, which substantially reduces, have it is small in size, light-weight, the low advantage of manufacturing cost is conducive to
It is promoted in the market.
The essence of the utility model is described in detail in the above specific embodiment, but can not be come with this to this reality
It is limited with novel protection scope.It should be evident that under the enlightenment of the utility model in essence, the common skill of the art
Art personnel can also carry out many improvement and modification, it should be noted that these improvement and modification all fall in the power of the utility model
Within the scope of benefit is claimed.
Claims (5)
1. a kind of miniaturization object space telecentric optical system, it is characterised in that: be included in light along object plane to as plane propagation side
The first lens, the second lens, the third lens, the 4th lens, the 5th lens, aperture diaphragm, the 6th lens being arranged successively upwards；
First lens, the second lens, the third lens, the 4th lens, the 5th lens constitute preceding group of positive light coke, and described the
Six lens constitute rear group of positive light coke；
If total focal power of the optical system is φ, first lens to the 6th power of lens are followed successively by φ 1
To φ 6, then 1/ φ=0.727 of φ, 3/ φ of φ 2/ φ=0.774, φ=5/ φ of -0.845, φ 4/ φ=0.909, φ=-
0.314, φ 6/ φ=1.409.
2. a kind of miniaturization object space telecentric optical system according to claim 1, it is characterised in that: second lens and
The third lens form double agglutination lens group.
3. a kind of miniaturization object space telecentric optical system according to claim 1, it is characterised in that: first lens are adopted
With biconvex positive power lens, the second lens using biconvex positive power lens, the third lens using bent moon negative-power lenses,
4th lens are using bent moon just using bent moon negative-power lenses, the 6th lens using bent moon positive power lens, the 5th lens
Power lenses.
4. a kind of miniaturization object space telecentric optical system according to claim 1, it is characterised in that: before first lens
Surface curvature radius is 11.657mm, and rear surface radius of curvature is -107.392mm, center thickness 4.69mm, lens light admission port
Diameter is φ 38.0mm；The second lens front surface radius of curvature is 53.269mm, and rear surface radius of curvature is -92.503mm,
Center thickness is 6.05mm, and lens clear aperture is φ 36.0mm；The third lens front surface radius of curvature be-
92.503mm, rear surface radius of curvature are 382.56mm, and center thickness 1.5mm, lens clear aperture is φ 35.2mm；It is described
4th lens front surface radius of curvature be 30.106mm, rear surface radius of curvature be 70.089mm, center thickness 4.75mm, thoroughly
Mirror clear aperture is φ 31.2mm；The 5th lens front surface radius of curvature is 61.1mm, and rear surface radius of curvature is
14.822mm, center thickness 9.99mm, lens clear aperture are φ 18.8mm；6th lens front surface radius of curvature be-
63.298mm, rear surface radius of curvature are -41.297mm, and center thickness 3.98mm, lens clear aperture is φ 34.4mm.
5. a kind of miniaturization object space telecentric optical system according to claim 1, it is characterised in that: first lens are adopted
It is made of dense flint glass material, second lens are made of fluor crown material, the third lens are using dense flint
Glass material is made, the 4th lens are made of dense crown material, the 5th lens are using dense flint glass material
It is made, the 6th lens are made of dense flint glass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821648889.4U CN208937801U (en) | 2018-10-11 | 2018-10-11 | A kind of miniaturization object space telecentric optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821648889.4U CN208937801U (en) | 2018-10-11 | 2018-10-11 | A kind of miniaturization object space telecentric optical system |
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| Publication Number | Publication Date |
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| CN208937801U true CN208937801U (en) | 2019-06-04 |
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|---|---|---|---|
| CN201821648889.4U Expired - Fee Related CN208937801U (en) | 2018-10-11 | 2018-10-11 | A kind of miniaturization object space telecentric optical system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188660A (en) * | 2018-10-11 | 2019-01-11 | 佛山科学技术学院 | A kind of miniaturization object space telecentric optical system |
| CN114384676A (en) * | 2022-01-19 | 2022-04-22 | 广东奥普特科技股份有限公司 | Achromatic object space telecentric lens |
-
2018
- 2018-10-11 CN CN201821648889.4U patent/CN208937801U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188660A (en) * | 2018-10-11 | 2019-01-11 | 佛山科学技术学院 | A kind of miniaturization object space telecentric optical system |
| CN109188660B (en) * | 2018-10-11 | 2023-11-28 | 佛山科学技术学院 | Miniaturized object space telecentric optical system |
| CN114384676A (en) * | 2022-01-19 | 2022-04-22 | 广东奥普特科技股份有限公司 | Achromatic object space telecentric lens |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190604 Termination date: 20201011 |