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Focusing method of economical high-resolution day and night lenses

A high-resolution, lens technology, applied in the direction of installation, optics, instruments, etc., to achieve the effect of high resolution, accurate precision and high resolution

Active Publication Date: 2018-01-12
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This resolution is far from meeting the requirements of today's high-definition cameras.

Method used

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  • Focusing method of economical high-resolution day and night lenses
  • Focusing method of economical high-resolution day and night lenses

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1~2 As shown, a high-resolution day and night dual-use economical lens, the optical system of the lens is provided with the front group A of the lens group with negative refractive power and the positive lens group with positive refractive power in the optical system along the incident direction of light from left to right. The rear group B of the lens group, an IR-CUT double filter C is arranged between the front group A and the rear group B, and the front group A includes a negative crescent lens A-1 and a double concave lens arranged sequentially from left to right A glued group of lenses A-2 and a positive crescent lens A-3; the rear group B includes a double-convex lens B-1, a negative crescent lens B-2, and a double-convex lens arranged in sequence from left to right. B-3.

[0023] In this embodiment, the air gap bet...

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Abstract

The invention relates to a focusing method of a high-resolution day and night dual-purpose economical lens. The optical system of the lens is sequentially provided with a front group A of the lens group with a negative focal power and an optical focal point along the incident direction of light from left to right. The rear group B is a positive lens group, and an IR-CUT double filter C is arranged between the front group A and the rear group B, and the front group A includes a negative crescent lens A- that is arranged sequentially from left to right 1 and double-concave lens A-2 tightly bonded group, negative crescent lens A-3; the rear group B includes double-convex lens B-1, negative crescent lens B-2, Bi-convex lens B‑3, this high-resolution day and night dual-use economical lens has high optical indicators, large optical target surface, and a resolution higher than 5 million pixels. It can be used with 16:9 1 / 2.7″ high-definition The supporting use of the camera enables the camera system to meet the requirements of high-definition photography of the scene in the high-light dynamic range environment, and there is almost no distortion.

Description

technical field [0001] The invention relates to the field of optical imaging devices of video technology, in particular to a focusing method of a high-resolution day and night dual-purpose economical lens. Background technique [0002] The rapid development of science and technology and the gradual improvement of people's safety awareness have promoted the continuous progress of the security market. Nowadays, with the continuous maturity of advanced video compression coding technology, the rapid development of IP-based network transmission and the application of digital zoom technology, a series of high-definition cameras with 3 million and 5 million pixels have been launched on the market. However, in the process of network transmission and digital zooming, the clarity (that is, resolution) of the video will decrease to a certain extent. At the same time, people have higher and higher requirements for image resolution, so the front-end lens higher resolution requirements. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/14G02B7/04
Inventor 潘俊达王烨朱艳文苏青年
Owner FUJIAN FORECAM OPTICS CO LTD
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