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High-resolution Scheimpflug lens

A high-resolution, sham technology, applied in the field of optical systems, can solve the problems of low resolution and large size of optical lenses

Inactive Publication Date: 2020-08-25
SUZHOU CASIA ALL PHASE INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the optical lens used for non-contact measurement in the prior art has technical problems such as low resolution and large size

Method used

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  • High-resolution Scheimpflug lens
  • High-resolution Scheimpflug lens
  • High-resolution Scheimpflug lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Sham lens focal length f=18.9mm, F / #=4, IH=4.76, TTL / IH=12.8, the detailed design structure is as follows image 3 The detailed design parameters are shown in Table 1.

[0057] The design parameter of Sham lens in the embodiment 1 of table 1

[0058]

[0059]

[0060] Among them, surfaces 1 and 2 are optical filters. In this design, the angle between the target plane and the optical axis is α=28 degrees, the angle between the detector plane and the optical axis is β=77.51 degrees, and the lens magnification b' / a'=0.1177. In addition, tan(α) / tan(β)=0.1177, that is, the relationship (1) is satisfied. Figure 4 The imaging quality MTF curve diagram of Example 1 is given, MTF>0.5 under the full field of view, Figure 5 The axial spherical aberration curve diagram of Example 1 is given, which is less than 0.05mm under the full aperture, Image 6 The distortion curve of Example 1 is given, and the distortion is less than 0.5% in the full field of view. In summary, ...

Embodiment 2

[0062] Sham lens focal length f=18.05mm, F / #=4, IH=4.76, TTL / IH=11.56, the detailed design structure is as follows Figure 7 The detailed design parameters are shown in Table 2.

[0063] The design parameters of Sham lens in table 2 embodiment 2

[0064]

[0065]

[0066] Among them, surfaces 1 and 2 are optical filters. In this design, the angle between the target plane and the optical axis is α=28 degrees, the angle between the detector plane and the optical axis is β=77.62 degrees, and the lens magnification b' / a'=0.1167. In addition, tan(α) / tan(β)=0.1167, that is, the relationship (1) is satisfied. Figure 8 The imaging quality MTF curve diagram of Example 2 is given, MTF>0.5 under the full field of view, Figure 9 The axial spherical aberration curve diagram of Example 2 is given, which is less than 0.05mm under the full aperture, Figure 10 The distortion curve of Example 2 is given, and the distortion is less than 0.5% in the full field of view. In summary, t...

Embodiment 3

[0068] Lens focal length f=18.49mm, F / #=4, IH=4.76, TTL / IH=11.61, the detailed design structure is as follows Figure 11 The detailed design parameters are shown in Table 3.

[0069] The design parameters of Sham lens in table 3 embodiment 3

[0070]

[0071]

[0072] Among them, surfaces 1 and 2 are optical filters. In this design, the angle between the target plane and the optical axis is α=28 degrees, the angle between the detector plane and the optical axis is β=77.564 degrees, and the lens magnification b' / a'=0.11725. In addition, tan(α) / tan(β)=0.11725, that is, the relationship (1) is satisfied. Figure 12 The imaging quality MTF curve diagram of Example 2 is given, MTF>0.5 under the full field of view, Figure 13 The axial spherical aberration curve diagram of the embodiment is given, which is less than 0.05mm under the full aperture, Figure 14 The distortion curve of Example 3 is given, and the distortion is less than 0.5% in the full field of view. In summ...

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Abstract

The invention discloses a high-resolution Scheimpflug lens. The invention belongs to the technical field of optical systems, and the lens comprises a first spherical lens with positive focal power, asecond spherical lens with negative focal power, a third spherical lens with negative focal power, a fourth spherical lens with positive focal power, a fifth spherical lens with positive focal power,asixth spherical lens with positive focal power, and a seventh spherical lens with positive focal power, which are sequentially arranged from the object side to the image side, and the diaphragm is located between any two adjacent lenses in the fourth lens, the fifth lens, the sixth lens and the seventh lens or located between the seventh lens and the image side. Under the design of the lens, theScheimpflug lens can meet the following conditions: TTL / IH is less than or equal to 13; TTL is the distance from the front surface of the first spherical lens to the image surface, and IH is the half-image height of the diagonal line of the rectangular detector; therefore, the miniaturized Scheimpflug lens can be prepared. The high-resolution Scheimpflug lens has the advantages of high resolutionand miniaturization.

Description

technical field [0001] The invention belongs to the technical field of optical systems, and in particular relates to a high-resolution Sham lens. Background technique [0002] With the development of optics, image processing and computer technology, 3D line laser measurement technology has been widely used. It uses industrial cameras to capture corresponding image information, and performs a series of processing on the image to extract the required information, and finally achieves the purpose of measurement. 3D line laser measurement technology is a rapidly developing non-contact measurement, which has the advantages of good flexibility, high speed, high precision and intelligence. 3D line laser measurement technology requires a lens to shoot oblique targets, and traditional lenses are difficult to clearly image the entire field of view of oblique targets due to the limitation of depth of field. [0003] In the Chinese invention patent application CN110057301A (a height d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G03B11/00
CPCG02B13/00G03B11/00
Inventor 赵效楠顾庆毅汪雪林
Owner SUZHOU CASIA ALL PHASE INTELLIGENCE TECH CO LTD
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