CN203799100U - Double telecentric lens - Google Patents
Double telecentric lens Download PDFInfo
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- CN203799100U CN203799100U CN201420137000.1U CN201420137000U CN203799100U CN 203799100 U CN203799100 U CN 203799100U CN 201420137000 U CN201420137000 U CN 201420137000U CN 203799100 U CN203799100 U CN 203799100U
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- lens
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- telecentric
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- diaphragm
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- 125000006850 spacer group Chemical group 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 description 10
- 230000004075 alteration Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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Abstract
The utility model discloses a double telecentric lens, which comprises a lens barrel, a diaphragm arranged in the lens barrel, a first lens group arranged on one side of the diaphragm, and a second lens group arranged on the other side of the diaphragm. The first lens group and the second lens group are symmetrically arranged on the two sides of the diaphragm. According to the technical scheme of the utility model, since the first lens group and the second lens group are of a symmetrical structure relative to the diaphragm, the positive distortion and the negative distortion are cancelled out. Therefore, the distortion can be better controlled.
Description
Technical field
The utility model relates to a kind of optical lens, belongs to optical detection apparatus, optical measuring apparatus field.
Background technology
Optical detection apparatus or optical measuring apparatus are used non-Telecentric scanning lens, and when detecting or measure out of focus, in CCD (Charge Coupled Device, charge coupled cell) position above, the increase with defocusing amount increases in measured position.Use two telecentric lens, due in camera lens field range, the optical axis of incident light and emergent light is basically perpendicular to object being measured, and when object being measured out of focus, the position of object being measured on CCD do not change with the variation of defocusing amount substantially.
Yet of the prior art pair of telecentric lens is good not to aberration control, be therefore necessary to design a kind of novel two telecentric lens to solve the problems of the technologies described above.
Utility model content
The purpose of this utility model is to provide a kind of aberration control preferably two telecentric lens.
For realizing above utility model object, the utility model adopts following technical scheme: a kind of pair of telecentric lens, the second lens set that it comprises lens barrel, is positioned at the diaphragm of described lens barrel, is positioned at the first lens set of described diaphragm one side and is positioned at described diaphragm opposite side, wherein said the first lens set and described the second lens set are arranged at the both sides of described diaphragm symmetrically.
As further improvement of the utility model, described the first lens set axially and gradually comprises first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens near in the direction of described diaphragm successively along described lens barrel; Described the second lens set along described lens barrel axially and gradually away from comprising successively the 6th lens, the 7th lens, the 8th lens, the 9th lens and the tenth lens in the direction of described diaphragm.
As further improvement of the utility model, the both sides of described first lens are convex surface; Described the second lens face is convex surface to a side of described first lens, towards a side of described the 3rd lens, is concave surface; Described the 3rd lens face is convex surface to a side of described the second lens, towards a side of described the 4th lens, is concave surface; Described the 4th lens face is convex surface to a side of described the 3rd lens, towards a side of described the 5th lens, is concave surface; Described the 5th lens face is convex surface to a side of described the 4th lens, towards a side of described diaphragm, is concave surface.
As further improvement of the utility model, described first, second lens are mutually close, described the 3rd, the 4th, the 5th lens are close successively, and the spacing between described the second lens and described the 3rd lens is greater than the spacing between other any two adjacent lens in described the first lens set.
As further improvement of the utility model, described lens barrel is provided with some stepped holes, and the external diameter of described first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens reduces successively and is contained in corresponding stepped hole.
As further improvement of the utility model, described first lens is fixed with trim ring away from a side of described the second lens, between described first, second lens, be provided with spacer ring, described the 3rd lens are fixed with trim ring away from a side of described the 4th lens, between described the 3rd, the 4th lens, be provided with spacer ring, between described the 4th, the 5th lens, be also provided with spacer ring.
As further improvement of the utility model, described first lens is the positive eyeglass of biconvex, and effective focal length is 250.901 millimeters; Described the second lens are the positive eyeglass of convex-concave, and effective focal length is 163.649 millimeters; Described the 3rd lens are the positive eyeglass of convex-concave, and effective focal length is 164.059 millimeters; Described the 4th lens are the positive eyeglass of convex-concave, and effective focal length is 153.024 millimeters; Described the 5th lens are the positive eyeglass of convex-concave, and effective focal length is-44.661 millimeters.
As further improvement of the utility model, two spherical radius of described first lens are respectively 206.906 millimeters and-1510.023 millimeters, and two corresponding thickness are respectively 20.00 millimeters and 1.00 millimeters; Two spherical radius of described the second lens are respectively 72.582 millimeters and 190.104 millimeters, and two corresponding thickness are respectively 10.05 millimeters and 19.48 millimeters; Two spherical radius of described the 3rd lens are respectively 52.371 millimeters and 101.971 millimeters, and two corresponding thickness are respectively 7.43 millimeters and 1.00 millimeters; Two spherical radius of described the 4th lens are respectively 34.001 millimeters and 56.913 millimeters, and two corresponding thickness are respectively 7.65 millimeters and 3.99 millimeters; Two spherical radius of described the 5th lens are respectively 99.020 millimeters and 24.493 millimeters, and two corresponding thickness are respectively 5.00 millimeters and 28.59 millimeters.
As further improvement of the utility model, the lens ratio of described pair of telecentric lens is-1X that lens distortion is less than 0.005%.
As further improvement of the utility model, described pair of telecentric lens can mate large visual field line array CCD, and the maximum image space diameter of eyeglass is 70 millimeters.
Compared to prior art, the of the present utility model pair of telecentric lens is that the symmetrical structure by the first lens set and the second lens set completes aberration control, because the first lens set and the second lens set are symmetrical structure with respect to diaphragm, therefore positive barrel distortion can be cancelled out each other, thereby has realized good aberration control.
Accompanying drawing explanation
Fig. 1 is the sectional view of of the present utility model pair of telecentric lens, and demonstrates the optical schematic diagram of line array CCD.
Fig. 2 is the distortion figure of the two telecentric lens shown in Fig. 1.
Fig. 3 is the allowance control schematic diagram of the two telecentric lens shown in Fig. 1.
Embodiment
Shown in please refer to the drawing 1, the utility model has disclosed a kind of pair of telecentric lens 100, the second lens set 4 that it comprises lens barrel 1, is positioned at the diaphragm 2 of described lens barrel 1, is positioned at the first lens set 3 of described diaphragm 2 one sides and is positioned at described diaphragm 2 opposite sides, wherein said the first lens set 3 and described the second lens set 4 are arranged at the both sides of described diaphragm 2 symmetrically.
Shown in please refer to the drawing 1, described the first lens set 3 axially and gradually comprises first lens 31, the second lens 32, the 3rd lens 33, the 4th lens 34 and the 5th lens 35 near in the direction of described diaphragm 2 successively along described lens barrel 1.Described the second lens set 4 along described lens barrel 1 axially and gradually away from comprising successively the 6th lens 41, the 7th lens 42, the 8th lens 43, the 9th lens 44 and the tenth lens 45 in the direction of described diaphragm 2.
The both sides of described first lens 31 are convex surface; Described the second lens 32 are convex surface towards a side of described first lens 31, towards a side of described the 3rd lens 33, are concave surface; Described the 3rd lens 33 are convex surface towards a side of described the second lens 32, towards a side of described the 4th lens 34, are concave surface; Described the 4th lens 34 are convex surface towards a side of described the 3rd lens 33, towards a side of described the 5th lens 35, are concave surface; Described the 5th lens 35 are convex surface towards a side of described the 4th lens 34, towards a side of described diaphragm 2, are concave surface.Described the 6th lens 41 are identical and be symmetrical arranged to first lens 31 with described the 5th lens 35 respectively to the tenth lens 45, do not repeat them here.
Because described the first lens set 3 is symmetrical arranged with described the second lens set 4, below only take the first lens set 3 and be described as example.
Described first, second lens 31,32 are mutually close, and described the 3rd, the 4th, the 5th lens 33,34,35 are close successively.Spacing between described the second lens 32 and described the 3rd lens 33 is greater than the spacing between other any two adjacent lens in described the first lens set 3.
Described lens barrel 1 is provided with some stepped holes (not label), and the external diameter of described first lens 31, the second lens 32, the 3rd lens 33, the 4th lens 34 and the 5th lens 35 reduces successively and is contained in corresponding stepped hole.Described first lens 31 is fixed with trim ring 51 away from a side of described the second lens 32, between described first, second lens 31,32, be provided with spacer ring 52, described the 3rd lens 33 are fixed with trim ring 53 away from a side of described the 4th lens 34, between described the 3rd, the 4th lens 33,34, be provided with spacer ring 54, between described the 4th, the 5th lens 34,35, be also provided with spacer ring 55.
Described first lens 31 to concrete spherical radius value and the one-tenth-value thickness 1/10 of the tenth lens 45 please be joined following table.Shown in optical performance curve please refer to the drawing 2 of described pair of telecentric lens 100.
It should be noted that, the spherical radius numerical value of above-mentioned each lens and thickness value meet every optical index and design.
Described first lens 31 is the positive eyeglass of biconvex, and effective focal length is 250.901 millimeters; Described the second lens 32 are the positive eyeglass of convex-concave, and effective focal length is 163.649 millimeters; Described the 3rd lens 33 are the positive eyeglass of convex-concave, and effective focal length is 164.059 millimeters; Described the 4th lens 34 are the positive eyeglass of convex-concave, and effective focal length is 153.024 millimeters; Described the 5th lens 35 are the positive eyeglass of convex-concave, and effective focal length is-44.661 millimeters.
The in the situation that of coupling above-mentioned parameter, the thickness of described diaphragm 2 is 28.59 millimeters.
Shown in please refer to the drawing 1, the design wavelength (λ) of the two telecentric lens 100 of the utility model is respectively 655 nanometers, 605 nanometers, and 592 nanometers, 555 nanometers, 455 nanometers, weight is respectively 24,22, and 20,16,12.Object height diameter is 70 millimeters, and lens ratio is-1X that object space numerical aperture is 0.04 millimeter.Object space operating distance is 129.76 millimeters, and image space operating distance is 129.94 millimeters.
The of the present utility model pair of telecentric lens 100 is that the symmetrical structure by the first lens set 3 and the second lens set 4 completes aberration control, because the first lens set 3 and the second lens set 4 are symmetrical structure with respect to diaphragm 2, therefore positive barrel distortion can be cancelled out each other, thereby has realized good aberration control.The optical property evaluation of the two telecentric lens 100 of the utility model as shown in Figure 2, wherein can find that the aberration control of camera lens is in 0.005%.In addition, as shown in Figure 3, the requirement of camera lens tolerance is lower, thereby is convenient to machining eyeglass and assembling.Described pair of telecentric lens 100 can mate large visual field line array CCD, and the maximum image space diameter of eyeglass is 70 millimeters.
These are only preferred embodiment of the present utility model, should not limit scope of the present utility model with this, be that every simple equivalence of doing according to the utility model claims and utility model description changes and modifies, all should still belong in the scope that the utility model patent contains.
Claims (10)
1. a two telecentric lens, it is characterized in that: the described pair of telecentric lens comprises lens barrel, is positioned at the diaphragm of described lens barrel, the second lens set that is positioned at the first lens set of described diaphragm one side and is positioned at described diaphragm opposite side, and wherein said the first lens set and described the second lens set are arranged at the both sides of described diaphragm symmetrically.
2. as claimed in claim 1 pair of telecentric lens, is characterized in that: described the first lens set axially and gradually comprises first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens near in the direction of described diaphragm successively along described lens barrel; Described the second lens set along described lens barrel axially and gradually away from comprising successively the 6th lens, the 7th lens, the 8th lens, the 9th lens and the tenth lens in the direction of described diaphragm.
3. as claimed in claim 2 pair of telecentric lens, is characterized in that: the both sides of described first lens are convex surface; Described the second lens face is convex surface to a side of described first lens, towards a side of described the 3rd lens, is concave surface; Described the 3rd lens face is convex surface to a side of described the second lens, towards a side of described the 4th lens, is concave surface; Described the 4th lens face is convex surface to a side of described the 3rd lens, towards a side of described the 5th lens, is concave surface; Described the 5th lens face is convex surface to a side of described the 4th lens, towards a side of described diaphragm, is concave surface.
4. as claimed in claim 2 pair of telecentric lens, it is characterized in that: described first, second lens are mutually close, described the 3rd, the 4th, the 5th lens are close successively, and the spacing between described the second lens and described the 3rd lens is greater than the spacing between other any two adjacent lens in described the first lens set.
5. as claimed in claim 2 pair of telecentric lens, is characterized in that: described lens barrel is provided with some stepped holes, and the external diameter of described first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens reduces successively and is contained in corresponding stepped hole.
6. as claimed in claim 5 pair of telecentric lens, it is characterized in that: described first lens is fixed with trim ring away from a side of described the second lens, between described first, second lens, be provided with spacer ring, described the 3rd lens are fixed with trim ring away from a side of described the 4th lens, between described the 3rd, the 4th lens, be provided with spacer ring, between described the 4th, the 5th lens, be also provided with spacer ring.
7. as claimed in claim 3 pair of telecentric lens, is characterized in that: described first lens is the positive eyeglass of biconvex, and effective focal length is 250.901 millimeters; Described the second lens are the positive eyeglass of convex-concave, and effective focal length is 163.649 millimeters; Described the 3rd lens are the positive eyeglass of convex-concave, and effective focal length is 164.059 millimeters; Described the 4th lens are the positive eyeglass of convex-concave, and effective focal length is 153.024 millimeters; Described the 5th lens are the positive eyeglass of convex-concave, and effective focal length is-44.661 millimeters.
8. as claimed in claim 3 pair of telecentric lens, is characterized in that: two spherical radius of described first lens are respectively 206.906 millimeters and-1510.023 millimeters, and two corresponding thickness are respectively 20.00 millimeters and 1.00 millimeters; Two spherical radius of described the second lens are respectively 72.582 millimeters and 190.104 millimeters, and two corresponding thickness are respectively 10.05 millimeters and 19.48 millimeters; Two spherical radius of described the 3rd lens are respectively 52.371 millimeters and 101.971 millimeters, and two corresponding thickness are respectively 7.43 millimeters and 1.00 millimeters; Two spherical radius of described the 4th lens are respectively 34.001 millimeters and 56.913 millimeters, and two corresponding thickness are respectively 7.65 millimeters and 3.99 millimeters; Two spherical radius of described the 5th lens are respectively 99.020 millimeters and 24.493 millimeters, and two corresponding thickness are respectively 5.00 millimeters and 28.59 millimeters.
9. two telecentric lens as claimed in any of claims 1 to 8 in one of claims, is characterized in that: the lens ratio of described pair of telecentric lens is-1X, and lens distortion is less than 0.005%.
10. as claimed in claim 9 pair of telecentric lens, is characterized in that: described pair of telecentric lens can mate large visual field line array CCD, and the maximum image space diameter of eyeglass is 70 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420137000.1U CN203799100U (en) | 2014-03-25 | 2014-03-25 | Double telecentric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420137000.1U CN203799100U (en) | 2014-03-25 | 2014-03-25 | Double telecentric lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203799100U true CN203799100U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420137000.1U Expired - Lifetime CN203799100U (en) | 2014-03-25 | 2014-03-25 | Double telecentric lens |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360463A (en) * | 2014-12-05 | 2015-02-18 | 桂林电子科技大学 | Three-distal coaxial illumination imaging optical system |
| CN104777595A (en) * | 2015-04-26 | 2015-07-15 | 西安远心光学系统有限公司 | Bi-telecentric optical lens |
| CN105954860A (en) * | 2016-05-13 | 2016-09-21 | 西安远心光学系统有限公司 | One-key measurement bi-telecentric lens |
| CN107238915A (en) * | 2017-04-30 | 2017-10-10 | 西京学院 | One kind disappears veiling glare doubly telecentric optical lens |
| CN114994881A (en) * | 2022-06-24 | 2022-09-02 | 苏州大学 | Snapshot type spectrum confocal displacement sensor dispersion lens and design method thereof |
-
2014
- 2014-03-25 CN CN201420137000.1U patent/CN203799100U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360463A (en) * | 2014-12-05 | 2015-02-18 | 桂林电子科技大学 | Three-distal coaxial illumination imaging optical system |
| CN104777595A (en) * | 2015-04-26 | 2015-07-15 | 西安远心光学系统有限公司 | Bi-telecentric optical lens |
| CN105954860A (en) * | 2016-05-13 | 2016-09-21 | 西安远心光学系统有限公司 | One-key measurement bi-telecentric lens |
| CN107238915A (en) * | 2017-04-30 | 2017-10-10 | 西京学院 | One kind disappears veiling glare doubly telecentric optical lens |
| CN114994881A (en) * | 2022-06-24 | 2022-09-02 | 苏州大学 | Snapshot type spectrum confocal displacement sensor dispersion lens and design method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.188 Chuangyuan Road, industrial park, Suzhou, Jiangsu Province, 215000 Patentee after: Suzhou Weijia Technology Co.,Ltd. Address before: 215021 No.188, Xincheng Road, Dushuhu science and Education Innovation Zone, Suzhou Industrial Park, Jiangsu Province Patentee before: VEGA CNC TECHNOLOGY (SUZHOU) Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
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| CX01 | Expiry of patent term |