Lobster eye lens adopting tail end light absorbing coating to inhibit stray light generation

Abstract

The invention relates to a lobster eye lens adopting a tail end light absorbing coating to inhibit stray light generation and belongs to the technical field of bionic optics. The objective of the invention is to solve the problems of low utilization rate of optical energy, and no practical application of a front portion of a coating can be solved. The lobster eye lens of the invention is composed of a plurality of micro channel tubes each of which is composed of four trapezoid reflecting walls; and when light passes through the micro channel array, only when the light is reflected for n times (n is an odd number) at a horizontal direction and a vertical direction, the light is emitted to a focus and is imaged effectively. According to the invention, coatings are applied on tail ends of horizontal and vertical channel walls, such that stray light reflected for m times (m is an even number) is absorbed, and requirements for the length of the coatings at the horizontal direction and the length of the coatings at the vertical direction can be satisfied, such that cross-like focus arms at a cross-like image point can be effectively inhibited, and at the same time, background noise light strayed and scattered on an image surface can be eliminated, and the focusing quality of the lobster eye lens can be greatly improved.

Description

technical field [0001] The invention relates to a lobster-eye lens that uses a terminal light-absorbing coating to suppress the generation of stray light, which can significantly suppress the cross focus arm of the cross image point, and at the same time eliminate the background noise light that strays to the image surface. The focusing quality of the lobster eye lens will be greatly improved, and it belongs to the field of bionic optics technology. Background technique [0002] The lobster eye lens is composed of several microchannel tubes 1, see figure 1 As shown, each microchannel tube 1 has its own optical axis. The microchannel tube 1 is in the shape of a regular square prism with an apex angle of α. The inner walls of the four isosceles trapezoidal sides of the regular square prism are reflecting walls 2. The four sides of the bottom surface of the microchannel constitute the outer edge of the microchannel tube 1, the outer edge of each microchannel tube 1 is located ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low utilization rate of light energy and no practical function of the front-end coating in the existing technology of absorbing stray light and background light by using the light-absorbing coating at both ends, a method of using the light-absorbing coating at the end to suppress stray light is proposed. The lobster eye lens produced by astigmatism can suppress the generation of reflected stray light in the lobster eye optical system, reduce the impact of stray light on imaging quality, and at the same time improve the utilization rate of light energy and make the light absorbing coating play an effective role

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