Fish-eye lens

A fisheye lens and lens technology, applied in the field of optical lenses, can solve the problems of inability to meet day and night monitoring functions, lack of day and night confocal functions, and poor lens imaging quality, and achieve the effects of good imaging quality, total length, and large aperture.
CN110646919AActive Publication Date: 2020-01-03合肥联创光学有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
合肥联创光学有限公司
Publication Date
2020-01-03

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Abstract

The invention discloses a fish-eye lens, from the object side to the imaging side in sequence, comprising a first lens having a negative power and being a meniscus spherical lens with the concave surface facing the imaging side; a second lens having a negative power and being a meniscus aspherical lens with the concave surface facing the object side; a third lens having a positive power and beinga double convex spherical lens; a fourth lens having a positive power and being a double convex spherical lens; a fifth lens having a negative power and being a meniscus spherical lens with the concave surface facing the object side; and a sixth lens having a positive power and being a meniscus aspherical lens with the concave surface facing the imaging side or being a double convex aspherical lens, wherein the fourth lens and the fifth lens form a gluing lens. The fish-eye lens has the advantages of short total length, large image surface, wide angle, good day and night confocal performance and good imaging qulity.
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Description

technical field

[0001] The invention relates to the technical field of optical lenses, in particular to a fisheye lens. Background technique

[0002] The fisheye lens is a wide-angle lens with a large outer diameter of the front lens, an extremely short focal length, and a field of view of more than 170°. Due to the advantage of a large field of view, the fisheye lens is generally widely used in security monitoring and panoramic cameras. , sports cameras and vehicle-mounted camera fields.

[0003] At present, with the continuous development of optical technology, the structure and performance of fisheye lenses are constantly improving. Fisheye lenses used in the surveillance field usually require good imaging quality under visible light and infrared light conditions, and can achieve clear and bright surveillance images even under low illumination at night. However, most of the existing fisheye lenses do not have day and night The confocal function cannot meet the day and n...

Claims

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