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Ultra-large aperture day and night confocal lens

A aperture and confocal technology, applied in the field of optical imaging, can solve problems such as poor environmental adaptability, blurred focus shift images, long production cycle, etc., and achieve the effects of strong resistance to environmental temperature changes, improved chromatic aberration, and improved effects

Pending Publication Date: 2019-02-22
江西特莱斯光学有限公司
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  • Abstract
  • Description
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Problems solved by technology

For example, patent CN201710032592.9 discloses a super-large aperture high-definition fixed-focus lens, which has the following disadvantages: 1. It cannot correct 850nm near-infrared chromatic aberration, and cannot achieve day and night confocal effects; The investment is very large and the production cycle is long; 3. The environmental adaptability is poor, and the phenomenon of focus shift and image blurring will occur in extreme environments

Method used

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  • Ultra-large aperture day and night confocal lens

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Embodiment Construction

[0023] The super large aperture day and night confocal lens of the present invention includes a lens group, such as the composition of the lens group is a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a lens arranged along the direction from the object side to the image side. The fifth lens E5, the sixth lens E6, the seventh lens E7, the eighth lens E8, the ninth lens E9, and the tenth lens E10, the first lens E1 is a concave-convex lens with negative refractive power and the convex surface faces the object side, and the The second lens E2 is a biconcave lens with a negative power; the third lens E3 is a biconvex lens with a positive power; the fourth lens E4 is a positive biconvex lens with a power; the fifth lens E5 is a biconvex lens with a power of Positive biconvex lens; the sixth lens E6 is a biconcave lens with negative power; the seventh lens E7 is a biconcave lens with negative power; the eighth lens E8 is a biconvex lens with positive power; ...

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Abstract

The present invention relates to the technical field of optical imaging and particularly relates to an ultra-large aperture day and night confocal lens which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are arranged along a direction from an object side to an image side, by rationally using an ED ultra-low dispersion lens and defining the power of each lens, the color difference of a fixed focus lens is effectively improved, and the shooting effect is improved. The confocal lens has the characteristics of high resolution, ultra-large aperture, day and night confocal performance and strong resistance to environmental temperature changes so as to overcome deficiencies in theprior art.

Description

technical field [0001] The invention relates to a super large aperture day and night confocal lens, which belongs to the technical field of optical imaging. Background technique [0002] In the security field, the network camera is a common equipment in the security system, and the lens is the main component of the network camera. The performance of the lens directly affects the imaging quality and imaging field of view. With the continuous improvement of the technical index requirements of the security system, how to improve night and micro The quality of monitoring under light conditions has become a major issue in the security industry. The existing solution is a super-large aperture without day and night confocal. The disadvantage is that the low-light effect is not good enough, and white light supplementary light will cause light pollution. There is no day and night confocal, so infrared lights cannot be used. Supplementary light cannot improve the effect of fog penetrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/00G02B7/02G02B7/00
CPCG02B7/006G02B7/021G02B7/025G02B13/0045G02B13/006G02B13/06
Inventor 吴强华胡长涛张福美
Owner 江西特莱斯光学有限公司
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