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imaging lens

An imaging lens, lens technology, applied in optical components, instruments, optics, etc., can solve problems such as insufficient

Active Publication Date: 2021-06-08
MEJIRO 67 INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, neither of them is sufficient as an imaging lens for a defect inspection device of a display screen using an area CMOS image sensor having 120 million pixels, for example.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Table 1 shows the specifications and lens data of the imaging lens of Example 1. As shown in the table, when the absolute value of the magnification of the imaging lens of Example 1 becomes larger, that is, when the object distance d0 becomes smaller, the surface number 11 becomes larger, that is to say, the Galilean lens group is relatively retro-looking. The telephoto lens group moves toward the image side.

[0102] [Table 1]

[0103] magnification 0.01208 0.06242 0.12065 focal distance 59.776 60.125 60.511 F / 4.3 4.0 3.8 face number 0 5,000.000 1013.131 550.737 Side number 11 10.316 11.511 12.814 Side number 15 5.274 8.114 11.448

[0104] Face number Radius Thickness Glass 0 1,013.131 1 31.877 4.000 1.5952，67.74 2 64.542 0.500 3 21.697 2.000 1.5174，52.43 4 17.152 11.491 5 19.251 4.000 1.5952，67.74 6 -89.579 1.000 1.5174，52.43 7 14.897 3....

Embodiment 2

[0112] Table 2 shows the specifications and lens data of the imaging lens of Example 2. As shown in the table, when the absolute value of the magnification of the imaging lens of Example 2 becomes larger, that is, when the object distance d0 becomes smaller, the surface number 11 becomes larger, that is to say, the Galilean lens group is relatively retro-looking. The telephoto lens group moves toward the image side.

[0113] [Table 2]

[0114] magnification 0.01209 0.06263 0.12079 focal distance 59.833 60.126 60.448 F / 4.3 4.0 3.8 face number 0 5,000.000 1008.966 548.731 Side number 11 9.627 10.642 11.746 Side number 15 7.100 10.000 13.375

[0115] Face number Radius Thickness Glass 0 1008.966 1 31.539 4.000 1.5952，67.74 2 62.854 0.500 3 21.458 2.000 1.5174，52.43 4 16.866 10.741 5 19.085 4.000 1.5952，67.74 6 -84.585 1.000 1.5174，52.43 7 14.806 3.0...

Embodiment 3

[0123] Table 3 shows the specifications and lens data of the imaging lens of Example 3. As shown in the table, when the absolute value of the magnification of the imaging lens of Example 3 becomes larger, that is, when the object distance d0 becomes smaller, the surface number 11 becomes larger, that is to say, the Galilean lens group has a larger relative to the retrospective lens group. The telephoto lens group moves toward the image side.

[0124] [table 3]

[0125] magnification 0.01211 0.06329 0.12095 focal distance 59.972 60.139 60.319 F / 4.3 4.0 3.8 face number 0 5,000.000 996.750 544.67 Side number 11 7.795 8.447 9.148 Side number 15 11.978 15.000 18.422

[0126] Face number Radius Thickness Glass 0 996.750 1 31.788 4.000 1.5952，67.74 2 62.227 0.500 3 20.755 2.000 1.5174，52.43 4 16.139 9.597 5 18.844 4.000 1.5952，67.74 6 -76.327 1.000 1.5174，52....

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Abstract

The invention provides an imaging lens with high resolution. The imaging lens (10) has a reverse telephoto lens group (20) and a Galileo type lens group (30) sequentially from the object side, and the reverse telephoto lens group has a meniscus-shaped lens with a convex surface facing the object side sequentially from the object side A first unit (21) and a second unit (22) comprising a diaphragm, the Galilean lens group has a positive lens unit (31) with a positive refractive power and a negative lens unit (32) with a negative refractive power in sequence from the object side ).

Description

technical field [0001] The present invention relates to an imaging lens, for example, to an imaging lens for imaging light on a light receiving portion of a CMOS image sensor. Background technique [0002] Liquid crystal displays (LCDs) and organic EL displays (OLEDs) are becoming more and more sophisticated. For example, a 4K display has approximately 8 million pixels, and an 8K display has approximately 33 million pixels. The size of one pixel of a 4K / 100-inch display is about 600 μm, and the size of one pixel of an 8K / 100-inch display is about 400 μm. The diagonal length of a 100-inch display is 2540 mm, and since it is difficult to process 8 million pixels in this size, it is necessary to check the display screen. [0003] Conventionally, inspection devices disclosed in Patent Documents 1 and 2 are known as devices for inspecting defects in liquid crystal displays and organic EL displays. [0004] For example, an area CMOS image sensor having 120 million pixels is use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/02G02B13/04
CPCG02B13/02G02B13/04
Inventor 上原诚
Owner MEJIRO 67 INC