Transmitted wavefront detection apparatus and method for meniscus lens

Abstract

The invention relates to a transmitted wavefront detection apparatus and method for a meniscus lens. The transmitted wavefront detection apparatus for a meniscus lens comprises an interferometer, a computed hologram, a to-be-detected meniscus lens and a spherical surface reflector, which are all connected in sequence along an optical path. The light emitting end of the interferometer is provided with a standard lens. The transmitted wavefront detection method comprises the following steps: firstly, obtaining a measurement total error W2 of the spherical surface reflector; secondly, obtaining a measurement total error W1 of the meniscus lens; and thirdly, processing data according to a first detection result W1 and a second detection result W2. The invention provides a novel, simple accurate method for measuring a transmitted wavefront of a meniscus lens. By means of the computed hologram, a holographic sheet can be in alignment with the interferometer, spherical aberration caused by the meniscus lens and the spherical surface reflector can be compensated, and then the whole detection system can achieve zero detection. The method provides simple measuring steps and provides an easy data processing means, and has remarkable engineering application values.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to a transmission wavefront detection device and a detection method of a meniscus lens. Background technique [0002] In the surface shape detection of convex aspheric surface, meniscus lens is a very widely used optical element. The transmitted wavefront error of the meniscus lens will directly affect the surface shape detection accuracy of the aspheric surface. The transmitted wavefront of the meniscus lens is affected by many factors, such as the surface error of the two spherical surfaces of the meniscus lens, the distribution of the refractive index of the meniscus lens, and the distribution of material uniformity. Especially in the meniscus lens with large aperture, the measurement of its transmitted wavefront has always been a difficult problem in optical inspection. [0003] Ma Jie et al. from the Nanjing Institute of Astronomical Optics Technology ...

AI Technical Summary

Problems solved by technology

Chen Qinfang and others from Xi'an Institute of Optics and Mechanics, Chinese Academy of Sciences ("Double doublet lens method to detect large relative aperture convex aspheric lens", Acta Photonica Sinica, 2014, 43(3): 0322004-1~5) proposed to use the method including meniscus lens The doublet lens method is used to detect convex aspheric surfaces, and the design and tolerance of the doublet lens are analyzed, but the influence of the processing accuracy of the meniscus lens on the test results is not considered.

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