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3.9mm high-definition glass-plastic pinhole lens and imaging method thereof

A lens and pinhole technology, applied in 3.9mm high-definition glass-plastic pinhole lens and its imaging field, can solve the problems of increased processing cost, small structure, low-cost pinhole lens, etc., achieve compact lens structure and reduce the size of lens structure , the effect of fewer structural lenses

Pending Publication Date: 2019-02-01
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the small structure, the processing technology of the glass lens is deteriorated, which greatly increases the processing cost
At present, there are few real low-cost, high-quality pinhole lenses on the market

Method used

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  • 3.9mm high-definition glass-plastic pinhole lens and imaging method thereof
  • 3.9mm high-definition glass-plastic pinhole lens and imaging method thereof
  • 3.9mm high-definition glass-plastic pinhole lens and imaging method thereof

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Embodiment Construction

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 1 to 2 As shown, a 3.9mm high-definition glass-plastic pinhole lens, the optical system of the lens is provided with a first aspherical lens A-1, a second aspherical lens B-1, a first aspherical lens A-1, a second aspherical lens B-1, a Adhesive cemented group of three aspherical lenses B-2, fourth aspherical lens B-3, biconvex lens B-4 and meniscus lens B-5; wherein the first aspherical lens A-1 constitutes a negative refractive power The front lens group, the second aspherical lens B-1, the third aspherical lens B-2, the fourth aspherical lens B-3, the biconvex lens B-4 and the meniscus lens B-5 are closely glued together to form the optical focus A rear lens with a positive degree.

[0018] In this embodiment, the focal length of the optical system is f, the first aspherical lens A-1, the second aspherical lens B-1, the ...

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Abstract

The invention relates to a 3.9mm high-definition glass-plastic pinhole lens. An optical system of the lens is provided with a first aspheric lens A-1, a second aspheric lens B-1, a third aspheric lensB-2, a fourth aspheric lens B-3, a biconvex lens B-4 and a tight connection gluing group of a meniscus lens B-5 sequentially in a left-right incident direction of light, wherein the first aspheric lens A-1 forms a front lens group with negative focal power; and the second aspheric lens B-1, the third aspheric lens B-2, the fourth aspheric lens B-3, the biconvex lens B-4 and the tight connection gluing group of the meniscus lens B-5 form a back lens group with positive focal power. The effects of high resolution, zero temperature drift and extremely small structure are achieved; and the lens can be adapted to a CCD or a CMOS with the pixels of five million or below.

Description

technical field [0001] The invention relates to a 3.9mm high-definition glass-plastic pinhole lens and an imaging method thereof. Background technique [0002] There are various pinhole lenses with extremely small structures on the existing security market. However, due to the extremely small structures such as pinholes, the structure of glass is greatly restricted, and spherical aberration and coma are difficult to be well corrected, and must be used. More glass and plywood designs can improve the pixel and performance of the lens. As a result, it is difficult for pinhole lenses to meet the market demand of extremely small structures such as pinholes, and it is difficult to realize the true meaning of pinhole monitoring. In order to improve performance and pixels, and to monitor miniaturization targets, it is difficult to achieve pinhole lenses in the true sense through glass material selection and design without using aspheric technology. At the same time, due to the sma...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B7/02
CPCG02B7/021G02B7/025G02B13/0045
Inventor 张荣曜肖维军
Owner FUJIAN FORECAM OPTICS CO LTD
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