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Optical imaging system

An optical imaging system, image-side technology, applied in optics, optical components, instruments, etc., can solve the problems of uneven brightness, low dynamic range, large transmittance deviation, etc., and achieve a small image plane chief ray incident angle , reduce tolerance sensitivity, improve the effect of image quality

Pending Publication Date: 2019-09-24
舜宇光学(中山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optical magnification of the machine vision optical imaging system currently on the market is small, the imaging frame is small, and its distortion is large, the brightness is uneven, etc. Although such a machine vision optical imaging system has a wide shooting range, its imaging is not delicate enough. When imaging, the dynamic range is not high, the color and contrast are not good enough, and the transmittance has a large deviation
[0004] As the use of machine vision becomes wider and wider, the requirements for machine vision optical imaging systems are getting higher and higher. At present, the machine vision optical imaging systems on the market are increasingly unable to meet the needs of the market, especially in some imaging quality requirements. High-precision high-tech fields are severely limited

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0068] based on figure 1 The configuration of the optical imaging system shown is illustrative of this embodiment.

[0069] The parameters of the optical imaging system in Embodiment 1 are as follows:

[0070] System total length TTL = 113.5mm; system focal length f = 55mm; system imaging object distance range 0.1m ~ inf; system frame Y = 40mm; system F number FNO = 3.0.

[0071] Table 2 lists the relevant parameters of the optical imaging system lens of the present embodiment:

[0072]

[0073]

[0074] Table 2

[0075] Wherein the fourth lens (i.e. the tenth lens L10) in the second lens group G2 is a concave-convex lens, and the refractive index and Abbe number of the lens are:

[0076] NdL10: 1.92

[0077] VdL10: 20.90

[0078] figure 2 , image 3 and Figure 4 Distortion, chromatic aberration of magnification, and chromatic aberration of position are respectively shown when the optical imaging system of this embodiment is in focus at the optimal working object...

Embodiment approach 2

[0082] Figure 5 It schematically represents the structural diagram of the optical imaging system according to the second embodiment of the present invention. The description according to this embodiment is as follows:

[0083] The parameters of the optical imaging system in Embodiment 2 are as follows:

[0084] System total length TTL = 116mm; system focal length f = 60mm; system imaging object distance range 0.1m ~ inf; system frame Y = 30mm; system F number FNO = 3.0.

[0085] Table 3 lists the relevant parameters of the optical imaging system lens of the present embodiment:

[0086] Face number Types of R value thickness Refractive index Abbe number S1 standard 50.000 4.000 1.85 30.1 S2 standard 80.000 2.000 S3 standard -230.369 2.000 1.85 23.8 S4 standard 1062.695 5.000 S5 standard 40.195 7.000 1.81 40.7 S6 standard -50.000 4.452 1.74 49. S7 standard 17.931 1.856 S8 sta...

Embodiment approach 3

[0095] Figure 9 It schematically shows the structural diagram of the optical imaging system according to the third embodiment of the present invention. The description according to this embodiment is as follows:

[0096] The parameters of the optical imaging system in Embodiment 3 are as follows:

[0097] System total length TTL = 113.6mm; system focal length f = 40mm; system imaging object distance range 0.1m ~ inf; system frame Y = 40mm; system F number FNO = 3.0.

[0098] The following table 4 lists the relevant parameters of the optical imaging system lens of the present embodiment:

[0099]

[0100]

[0101] Table 4

[0102] Wherein the fourth lens (i.e. the tenth lens L10) in the second lens group G2 is a concave-convex lens, and the refractive index and Abbe number of the lens are:

[0103] NdL10: 1.85

[0104] VdL10: 23.80

[0105] Figure 10 , Figure 11 and Figure 12 It is a diagram of distortion, chromatic aberration of magnification, and chromatic ...

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Abstract

The invention relates to an optical imaging system. The optical imaging system comprises in order from an object side to an image side along an optical axis: a first lens group (G1) having positive or negative power, an aperture stop (STOP), a second lens group (G2) having positive or negative power, and a third lens group (G3) having positive power; the first lens group (G1), the aperture stop (STOP) and the second lens group (G2) can move along the optical axis of the optical imaging system to focus different object distances. The optical imaging system has the characteristics of the low distortion, the large depth of field, the uniform picture quality, the good color rendition degree, the high contrast, the solution of the temperature drift problem and the resolution ratio of over 90 million.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to an optical imaging system. Background technique [0002] Machine vision refers to the use of machines instead of human eyes for measurement and judgment, converting the captured target into an image signal, and sending it to a dedicated image processing system to obtain the shape information of the captured target. According to the pixel distribution and brightness, color and other information, Transformed into digital signals; the image system performs various operations on these signals to extract the characteristics of the target, such as position, size, appearance, etc., and then outputs the results according to preset conditions to realize functions such as automatic identification, judgment, and measurement. [0003] Therefore, the optical imaging system used for machine vision has very high requirements on pixels, picture uniformity, distortion, brightness, and color reprodu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/0015G02B13/006
Inventor 周静胡可欣梁伟朝邹文镔
Owner 舜宇光学(中山)有限公司