A transmission type large-aperture infrared lens, processing tooling and processing method

Abstract

The invention relates to a transmission-type large-diameter infrared lens, a processing tool and a processing method, which solves the problem of difficult splicing and processing of a large-diameter transmission-type primary mirror. A transmission-type large-diameter infrared lens includes a frame and a plurality of sub-mirrors arranged in the frame, and the sub-mirrors include a circular sub-mirror and eight fan-shaped sub-mirrors. The invention can stably and reliably complete the splicing and processing of the primary mirror, and the light-blocking area of ​​the structural parts only accounts for 8% of the aperture of the primary mirror, which greatly reduces the difficulty of splicing, greatly reduces the light-blocking degree of the structural parts, saves costs, and is easy to control the development cycle , to prevent damage to the contact surface between the mirror and the frame, and prevent the influence of the main mirror surface. The processing process is stable and reliable, and can achieve better flatness and roughness. The maximum size is φ600mm.

Description

technical field [0001] The invention relates to the field of optical application technology, in particular to a large-diameter infrared lens, tooling and a processing method thereof. Background technique [0002] Infrared systems have all-weather monitoring capabilities, so they are widely used in aviation, aerospace, military and civilian fields. [0003] However, the transmission infrared optical system is limited by the size of the mirror blank material, so the current transmission infrared system is much smaller than the visible light system. The diameter of the on-orbit detection infrared system in Europe, America and other countries is generally only 400mm. [0004] The binary optical element is made of a periodic diffraction structure on the substrate. Compared with the traditional lens, the binary optical element has the advantages of small size, light weight, foldable, more design freedom, and wide material selection. The above characteristics make splicing and col...

AI Technical Summary

Problems solved by technology

; Although this traditional idea of ​​splicing primary mirrors is theoretically feasible when splicing transmissive primary mirrors, the splicing of transmissive primary mirrors is different from the splicing of reflective primary mirrors. The splicing of transmissive primary mirrors needs to consider occlusion, so primary mirrors The design of the mirror frame should not be too complicated, so the accuracy after splicing directly depends on the accuracy of processing, and the accumulation of optical processing errors, structural processing errors, and splicing errors often causes the spliced ​​primary mirror to fail to meet the actual imaging requirements

However, the problems of splicing and processing the large-aperture transmissive primary mirror have not been solved

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