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High-resolution day-and-night dual-use economical lens and focusing method thereof

A high-resolution, economical technology, applied in the direction of installation, optics, instruments, etc., to achieve high resolution, accurate accuracy, and ensure the effect of air separation

Active Publication Date: 2015-10-07
FUJIAN FORECAM OPTICS CO LTD
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  • 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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  • High-resolution day-and-night dual-use economical lens and focusing method thereof
  • High-resolution day-and-night dual-use economical lens and focusing method thereof

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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] Such as 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 negative 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 ...

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Abstract

The invention relates to a high-resolution day-and-night dual-use economical lens. In an optical system of the lens, a lens-group front group A with negative focal power and a lens-group rear group B with positive focal power are successively arranged at an incidence direction from left to right along light. An IR-CUT double filter C is arranged between the front group A and the rear group B. The front group A comprises a negative crescent lens A-1, a glue group closely connected to a double-concave lens A-2 and a negative crescent lens A-3 which are successively arranged from left to right. The rear group B comprises a double-convex lens B-1, a negative crescent lens B-2 and a double-convex lens B-3 which are successively arranged from left to right. An optical index of the high-resolution day-and-night dual-use economical lens is high, an optical target surface is large and a resolution ratio is higher than five million pixels. The lens can be used with a 16:9 system camera with 1 / 2.7'' high definition. A camera shooting system can realize a high definition shooting requirement to a scenery in a highlight dynamic change scope environment and there is little distortion.

Description

technical field [0001] The invention relates to the field of optical imaging devices of video technology, in particular to a high-resolution day and night dual-use economical lens and a focusing method thereof. 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 requireme...

Claims

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Application Information

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Patent Type & Authority Applications(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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