Novel ultra wide angle lens

Abstract

The invention discloses a novel ultra wide angle lens. The novel ultra wide angle lens comprises a lens shell. Pieces of optical glass sequentially arranged from the object space to the image space inside the lens shell include a first lens, a second lens, a third lens, a fourth lens, a diaphragm component, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the first lens is a strawhat-type lens with the negative focal power, the second lens is a biconcave lens or a plane concave lens with the negative focal power, the third lens is a falcate lens or a biconvex lens with the positive focal power, the fourth lens is a falcate lens or a biconvex lens with the positive focal power, the fifth lens is a falcate lens or a biconvex lens with the positive focal power, the sixth lens is a biconvex lens with the positive focal power, the seventh lens is a falcate lens with the negative focal power, the eighth lens is a biconvex lens with the positive focal power, and the eighth lens is connected with a color filter. The visible light wave band and the near-infrared wave band guided in by the lens are focused in the same focal plane, so that the novel ultra wide angle lens can conduct clear imaging in the day and night modes.

Description

[technical field] [0001] The invention relates to a novel super wide-angle lens. [Background technique] [0002] With the rapid rise of the security monitoring market this year and the optimization and improvement of digital processing and network transmission speeds, the quality requirements for security monitoring lenses have been greatly improved. From ordinary monitoring needs to high-definition identification, the requirements for lenses are also getting higher and higher. [0003] At present, the security monitoring lens is generally composed of 4 to 8 lenses, but the viewing angle range of this lens is at most 150 degrees, and there is a difference in focus position during the day and night, and the working distance is short, which is limited by high temperature, low temperature, and humidity in the environment. Can not meet customer requirements for small size and high performance. [0004] To this end, the company develops lenses using plastic aspheric technology t...

AI Technical Summary

Problems solved by technology

[0003] At present, the security monitoring lens is generally composed of 4 to 8 lenses, but the viewing angle range of this lens is at most 150 degrees, and there is a difference in focus position during the day and night, and the working distance is short, which is limited by high temperature, low temperature, and humidity in the environment. Cannot meet customer requirements for small size and high performance

[0004] To this end, the company develops lenses using plastic aspheric technology to reduce weight, cost and deformation. Maintain perfect imaging clarity in the temperature range of -60°C to +80°C

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