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High-pixel ultrashort starlight lens

An ultra-short star-level, high-pixel technology, applied in optics, optical components, instruments, etc., can solve the problems of insufficient light flux, large F number, high cost, etc., and achieve the effects of sufficient light flux, small size, and easy processing performance

Inactive Publication Date: 2017-05-31
DONGGUAN YUTONG OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First, in order to increase the pixel size, more lenses are used. For example, the lens disclosed in patent CN203311082U uses a structure of 7 lenses, but the cost of this structure will inevitably be high;
[0005] Secondly, the F number is relatively large, and the amount of light passing through is insufficient. For example, the F number of the lens disclosed in the patent application CN105259637A is 2.2, and the F number of the lens disclosed in the patent application CN105301739A is 2.0;
[0006] Again, the total length of the lens in the prior art is about 30mm, and the volume is relatively large

Method used

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Examples

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Embodiment 1

[0050] The high-pixel ultra-short star-level lens provided in this embodiment includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens arranged in sequence from the object side to the image side. The lens 6, the first lens 1, the third lens 3 and the fourth lens 4 are all glass spherical lenses, and the second lens 2, the fifth lens 5 and the sixth lens 6 are all plastic aspheric lenses.

[0051] The surface shape, curvature radius R, lens thickness, lens spacing, lens refractive index nd and K value of the twelve surfaces of the six lenses of the lens respectively meet the following conditions (Table 1):

[0052] Table 1: Physical parameters of the six lenses.

[0053]

[0054]

[0055] In the above table, "R" is the radius of curvature, "-" indicates that the direction is negative, and "PL" indicates a plane. If the serial number of the same surface in the above table has both refractive index data nd and data D, the data...

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Abstract

The invention belongs to the technical field of optical devices and particularly relates to a high-pixel ultrashort starlightlens. The high-pixel ultrashort starlight lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens sequentially from object space to image space, wherein the first lens, the third lens and the fourth lens are glass spherical lenses; the second lens, the fifth lens and the sixth lens are plastic aspherical lenses; the first lens is a plano-concave lens with negative focal power; the second lens is a concave-convex lens with negative focal power; the third lens is a biconvex lens with positive focal power; the fourth lens is a biconvex lens with positive focal power; the fifth lens is a biconcave lens with negative focal power; the sixth lens is a biconvex lens with positive focal power. In conclusion, the advantages of easy processing of the glass spherical lenses and high performance and low cost of the plastic aspherical lenses are exerted sufficiently, so that the visible light resolution of the lens can reach 5-mega pixels, the infrared resolution can reach 5-mega pixels, F-number of the lens reaches 1.2, the lens has sufficient light flux, and pictures are clear and bright. Meanwhile, the total length of the lens is smaller than 22 mm, and the lens is compact in size.

Description

technical field [0001] The invention belongs to the technical field of optical devices, in particular to a high-pixel ultra-short star-level lens. Background technique [0002] With the improvement of the whole society's security awareness and the improvement of social science and technology, high-quality security monitoring systems quickly occupy the market. As one of the core components of the security system, the monitoring lens plays an extremely important role in the monitoring work. , so there is fierce competition in the market. Lens performance includes various parameters such as pixels, F-number, and total length. [0003] The traditional 4mm fixed focus lens has the following disadvantages: [0004] First, in order to increase the pixel size, more lenses are used. For example, the lens disclosed in patent CN203311082U uses a structure of 7 lenses, but the cost of this structure will inevitably be high; [0005] Secondly, the F number is relatively large, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/0045G02B13/008
Inventor 李泽民
Owner DONGGUAN YUTONG OPTICAL TECH
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