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Road surveillance camera lens suitable for "starlight" ultra-low illumination

A surveillance camera, starlight-level technology, applied in optics, optical components, installation, etc., can solve the problem of not meeting the requirements of ultra-low illumination cameras, achieve consistent clear images, correct spherical aberration, and reduce Pittswan field curvature Effect

Active Publication Date: 2017-01-18
FOCTEK PHOTONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can no longer meet the use requirements of "starlight level" ultra-low illumination cameras

Method used

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  • Road surveillance camera lens suitable for "starlight" ultra-low illumination
  • Road surveillance camera lens suitable for "starlight" ultra-low illumination
  • Road surveillance camera lens suitable for "starlight" ultra-low illumination

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Embodiment Construction

[0059] The content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0060] see figure 1 with figure 2 As shown, it is a road monitoring camera lens suitable for "starlight level" ultra-low illumination provided by the present invention. The road monitoring camera lens includes a main lens barrel 5, which is characterized in that: the inner edge of the main lens barrel 5 The direction of incidence is provided with a front mirror group, an independent variable diaphragm 23 and a rear mirror group in sequence; the optical power of the front mirror group is positive, and the focal length range is between 35mm-50mm; the optical power of the rear mirror group is Positive, and the focal length range is between 15mm-25mm.

[0061] The front lens group is composed of a first lens 24, a second lens 25, a third lens 26, a fourth lens 27, and a fifth lens 28 arranged in sequence along the light inciden...

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Abstract

The invention relates to a road monitoring camera lens suitable for "starlight level" ultra-low illumination. The road monitoring camera lens includes a main lens barrel, and a front lens group and an independent variable diaphragm are sequentially arranged in the main lens barrel along the incident direction of light. and the rear lens group; the focal power of the front lens group is positive, and the focal length range is between 35mm-50mm; the optical power of the rear lens group is positive, and the focal length range is between 15mm-25mm; the lens device is conducive to increasing the The effective aperture of the system improves the effective resolution of the system and reduces the distortion of the system, so that the system monitors the field of view angle to 40°, the relative aperture D / f' is better than 1:1.2, and the MTF value of the full field of view is 150lp / mm More than 0.3, the distortion is less than 3%, and it is suitable for the camera image surface of 2 / 3inch or more, so as to meet the use requirements under the "starlight level" illumination conditions, and it is suitable for all-weather road monitoring and observation occasions in various harsh no-light environments.

Description

[0001] Technical field [0002] The present invention relates to an optical lens device with ultra-low illumination, low distortion, high pixel, and large phase surface, in particular to a "starlight level" ultra-low illumination road monitoring camera lens, which can be applied to intelligent transportation, bayonet detection, squares, machines Vision and other video monitoring fields, especially suitable for "starlight level" ultra-low illumination road monitoring and observation occasions. Background technique [0003] According to the standardized definition, the current security industry divides front-end cameras into four grades: ordinary cameras, generally with illumination greater than 0.1Lux; cameras with illumination ranging from 0.1Lux to 0.01Lux, generally called low-illumination cameras; and The so-called moonlight-level camera has an illumination range of 0.01Lux to 0.001Lux; when the illumination range reaches and exceeds 0.0001Lux, it will reach the "starlight-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B27/00G02B1/00G02B7/04G02B7/00
CPCG02B7/00G02B7/04G02B13/006G02B13/009G02B27/0025G02B1/00
Inventor 黄统樑罗联镜陆鹏林勇杰
Owner FOCTEK PHOTONICS INC
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