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Injection Molded Optical Clear Covers for Surveillance Cameras

A monitoring camera, optically transparent technology, applied in the direction of optics, camera body, camera, etc., can solve problems such as adverse effects on camera imaging quality, and achieve the effect of avoiding the formation of transition lines and excellent imaging quality.

Active Publication Date: 2018-01-30
福建富兰光学股份有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the adverse effect on the image quality of the camera existing in the dome cover of the existing surveillance camera, and provide an injection-molded optically transparent cover for the surveillance camera that has less influence on the image quality of the camera

Method used

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  • Injection Molded Optical Clear Covers for Surveillance Cameras
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  • Injection Molded Optical Clear Covers for Surveillance Cameras

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with combined drawings, so that those skilled in the art can understand the present invention.

[0019] Such as Figure 2-4 As shown, an injection-molded optically transparent cover for monitoring cameras is the same as the existing dome cover, which is a shell, the difference is that it is a half ellipse dome cover, and its curve equation is ( (b>a>0, y≥0)), the coordinate origin is O(0, 0), where: the height of the dome is b, the radius of the opening is a, 1.1:1≤b:a≤1.4:1, As the ratio of b:a increases, the difference between the elliptical protective cover and the ordinary dome cover gradually increases, and the circularity of the elliptic function gradually deviates. It is recommended that 1.1:1≤b:a≤1.4:1. In addition, the improvement effect of this invention on the horizontal angle is not very significant in the small ball machine, mainly because the focal length of the small ball machine is ...

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Abstract

An injection-molded optically transparent cover for surveillance cameras, the main point of which is that it is a half ellipsoid, and its curve equation is ( x 2 a 2 + y 2 b 2 = 1 ( b > a > 0 , y ≥ 0 ) ) , The origin of the coordinates is O(0,0), where: the height of the outer surface of the dome cover is b, the radius of the opening is a, 1.1:1≤b:a≤1.4:1. The invention utilizes that the height of the long axis direction of the ellipse (half) is greater than that of the circle, so that the optically transparent cover can have a greater height under the same caliber. Solved the phenomenon of ghosting and blurring when telephoto in the horizontal direction (‑10°-5°). It has no transition line phenomenon, and the entire section is composed of a complete geometric curve, which is the closest approximation to a circle. The protective cover formed in this way can avoid the formation of transition lines when the camera lens passes through this area to form an image, and the image quality can reach the best structure.

Description

technical field [0001] The invention belongs to the accessory of the camera in the monitoring system, in particular to the optical protective cover of the dome camera in the monitoring system. Background technique [0002] In order to prevent dust, rain, etc., a transparent protective cover is added outside the camera. The light emitted by the object must pass through the transparent cover before entering the camera. The transparent protective cover will affect the image quality of the camera. The current problems are as follows : [0003] Generally, the transparent cover is injection molded by acrylic resin with optical transparency. Due to the limitation of the manufacturing process, the thickness is about 2mm. The usual transparent cover is hemispherical. When the spherical surface exceeds the hemisphere, it cannot be demolded. A typical hemispherical protective cover will be blocked by the ceiling or its own assembly structure in the horizontal direction. [0004] In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225G03B17/56
Inventor 潘敏忠魏孝典许德
Owner 福建富兰光学股份有限公司
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