Omnibearing detection method for large-diameter aspherical mirror

Abstract

The big caliber nonspherical lens inspection controls the moving conoscope through the computer, continuously scanning the big caliber nonspherical lens along the symmetrical axis, acquiring the interference thread changing through time. The generated reference ball surface wave automatically matching with the nonspherical ball surface to be inspected, the best matching zone with low frequency distinguishable interference thread, moving from the center to the edge in the scanning process. Through acquiring the best matching point data to make overall caliber restructuring before the wave, it can acquire the overall information of the nonspherical surface. It is free from design and nonspherical surface compensator, and junction of sub caliber, providing an efficient tool to overall inspection for big caliber nonspherical lens with broad prospect.

Description

technical field [0001] The invention relates to an optical detection technology, in particular to a detection method for a rotationally symmetrical large-aperture aspheric mirror, which belongs to the field of advanced optical manufacturing and detection technology. technical background [0002] The so-called aspheric optical element refers to an optical element whose surface shape is determined by multiple high-order equations, and the radii of each point on the surface shape are not the same. Aspheric mirrors are special surfaces with many unique properties. If the quadric surface has no spherical aberration at the proper conjugate position, using the aspheric surface in the optical system can reduce the number of optical elements in the system or improve the imaging quality. With the development of optical precision processing, aspheric surfaces are more and more widely used in various optical systems, such as: high-quality cameras, video cameras, etc. In many fields su...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the above-mentioned several measurement methods, a detection method of large-aperture aspheric mirror full-field continuous scanning is proposed. This method can effectively solve the problems existing in several existing quantitative detection methods. High, difficult to manufacture, high cost, large amount of data, troublesome post-processing, etc., this method does not need to design and manufacture complex aspheric compensators, no sub-aperture splicing, simple system structure, small amount of data and easy processing, etc.

Images