Ultra-wide-angle athermalization day and night dual-purpose lens and working method thereof

Abstract

The invention relates to an ultra-wide-angle athermalization day and night dual-purpose lens and a working method thereof. The lens comprises a front group A, a diaphragm C, a rear group B, a parallelflat plate and an IMA image plane which are sequentially arranged in the incident direction of light from left to right. The front group A comprises a first meniscus negative lens and a second meniscus positive lens which are arranged in sequence, the rear group B comprises a first biconvex positive lens, a second biconvex positive lens and a third meniscus negative lens which are arranged in sequence, and the second meniscus positive lens of the front group A and the second biconvex positive lens and the third meniscus negative lens of the rear group B are plastic aspheric lenses. The invention further relates to a working method of the ultra-wide-angle athermalization day and night dual-purpose lens. The lens is simple and reasonable in structure, small in size, ultra-wide in angle, athermalized, capable of being used day and night and high in resolution ratio.

Description

Technical field: [0001] The invention relates to an ultra-wide-angle athermalized day-night dual-purpose lens and a working method thereof. Background technique: [0002] In recent years, as the application range of camera lenses has become more and more extensive, people have higher and higher requirements for the pixels and field of view of home lenses, as well as day and night dual-use; but the existing lenses generally have such shortcomings: the field of view Small, poor pixel and day-night dual-use effect, need to install one or even a few more lenses to achieve athermalization and day-night dual-use effect; small aperture, can not meet the minimum imaging illumination requirements of CCD chips under low illumination and cannot be clear The imaging and external dimensions are larger and take up more space. Contents of the invention [0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an ul...

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Problems solved by technology

[0002] In recent years, as the application range of camera lenses has become more and more extensive, people have higher and higher requirements for the pixels and field of view of home lenses, as well as day and night dual-use; but the existing lenses generally have such shortcomings: the field of view Small, poor pixel and day-night dual-use effect, need to install one or even a few more lenses to achieve athermalization and day-night dual-use effect; small aperture, can not meet the minimum imaging illumination requirements of CCD chips under low illumination and cannot be clear Imaging, larger size, more space

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