High-definition super wide angle day and night confocal lens

Abstract

The invention discloses a high-definition super wide angle day and night confocal lens. The high-definition super wide angle day and night confocal lens comprises a first lens, a second lens, a thirdlens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a diaphragm and an optical filter, wherein light emitted from an object passes through the first lens, the second lens,the third lens, the fourth lens, the diaphragm, the fifth lens, the six lens, the seventh lens, the eighth lens and the optical filter in sequence, and output light is imaged on an imaging device; the first lens and the second lens are meniscus lenses with negative focal power; the third lens and the fourth lens are biconvex lenses with positive focal power; the fifth lens is a meniscus lens withpositive focal power; the sixth lens is a biconcave lens with negative focal power; the seventh lens and the eighth lens are biconvex lenses with positive focal power. The confocal lens disclosed bythe invention has the advantage that the phenomenon of purple boundary is eliminated while high definition is achieved, so that the quality of the acquired image is improved.

Description

technical field [0001] The invention relates to the field of confocal lenses, in particular to a high-definition ultra-wide-angle day and night confocal lens. Background technique [0002] In recent years, with the continuous innovation of image sensor technology, the image quality has also been continuously improved. As one of the important components of the security monitoring system, the security monitoring lens has also developed from standard definition to high definition, imaging by a single visible light, or through 0.3 mm / 0.21mm high and low filter motorized switching to achieve clear day and night imaging to the development of confocal imaging of visible light and infrared light. There is a large market demand for security monitoring lenses such as megapixels, ultra-wide-angle, and day and night. Considering that LED energy-saving lamps are used for lighting in many occasions, and the blue light component in white LEDs is not small, this requires wide-spectrum purp...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-definition ultra-wide-angle day and night confocal lens, which solves the problem of purple fringing, day and night confocal and the influence of external environment temperature changes on lens imaging

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