Solar blind ultraviolet imaging optical lens and system

Abstract

The invention provides a solar blind ultraviolet imaging optical lens and a system. The solar blind ultraviolet imaging optical lens comprises a first meniscus lens piece and a second meniscus lens piece sequentially from an object side to an image side; the optical surfaces of the first meniscus lens piece and the second meniscus lens piece are spherical surfaces; one optical surface of the first meniscus lens piece is coated with a round ultraviolet reflection film; the rear surface of the second meniscus lens piece is coated with a round ultraviolet reflection film; and thus, to-be-detected light is outputted by the center of the second meniscus lens piece through reflection by the first meniscus lens piece and the second meniscus lens piece. As the solar blind ultraviolet imaging optical lens only comprises two spherical meniscus lens pieces, the optical elements in the solar blind ultraviolet imaging optical lens are few, and the utilization rate of light energy is high; the optical surfaces of the two meniscus lens pieces are both spherical surfaces, an aspheric surface is not needed, the manufacturing cost is low, and the technological performance is good. For the two meniscus lens pieces, hole opening in the center is not needed, and the manufacturing process is simple.

Description

technical field

[0001] The invention belongs to the technical field of optical instruments, in particular to a sun-blind ultraviolet imaging optical lens and system. Background technique

[0002] Ultraviolet imaging technology has a very broad application in electricity, criminal investigation and forest fire prevention. Most of the ultraviolet imaging lenses currently used are pure refraction objective lenses, and the overall length of the imaging optical path is longer than the focal length of the objective lens, which is not conducive to the miniaturization of the instrument; a small number of small-field objective lenses adopt a Cassegrain-like imaging structure, although this structure can be reduced by folding the optical path. The length of the system is small, but it is necessary to open a hole in the center of the aspheric primary mirror. In addition, in order to balance the off-axis aberration, it is necessary to add 1-2 field mirrors near the image plane. This kin...

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