Wide spectrumchromatic aberration reducing laser detection lens with super-long focal length and working method thereof

Abstract

The invention relates to a wide spectrum chromatic aberration reducing laser detection lens with a super-long focal length and a working method thereof. The wide spectrum chromatic aberration reducinglaser detection lens with the super-long focal length comprises a lens barrel and an optical system arranged in the lens barrel, the optical system comprises a front lens group A, a rear lens group Band a switch lens group C arranged from left to right in sequence in the incoming direction of lights, and the front lens group A comprises a positive crescent lens A1, a negative crescent lens A2, apositive crescent lens A3, a negative crescent lens A4 and a positive crescent lens A5; the rear lens group B comprises a negative crescent lens B1, a positive crescent lens B2 and a flat concave lens B3; and the switch lens group C comprises a double concave lens C1 and a double convex lens C2. The wide spectrum chromatic aberration reducing laser detection lens with the super-long focal lengthadopts a transmission-typetelephoto structure and has a focal length of 1.1 meter long, an optical overall length is smaller than 370 mm, and the volume of thewide spectrum chromatic aberration reducing laser detection lens is effectively reduced. The wide spectrum chromatic aberration reducing laser detection lens reduces chromatic aberration of a 630-1080 nm wide spectrum, adopts a high precision switch mechanism to perform lens group switch to compensate image surface skewing of laser beams of different incoming conditions at the same time, and realizes confocal surface image forming of a converging incoming 632 mm laser and a parallel incoming 1060 nm laser.

Description

Technical field: [0001] The invention relates to a wide-spectrum achromatic laser detection lens with an ultra-long focal length and a working method thereof. Background technique: [0002] For the same pixel size, in order to obtain high angular resolution, the optical system is required to have a longer focal length; in addition, for lenses used in the invisible wavelength band of the human eye, it is often necessary to use visible light for optical path adjustment, so the optical system Broad-spectrum achromatic requirements need to be put forward. For this long focal length and wide-spectrum achromatic lens, the most commonly used is the catadioptric optical structure. The main reflection part bears a large optical power without chromatic aberration. The chromatic aberration correction of the optical system is relatively easy, and the system The length can be made shorter. However, the reflective system also has defects such as difficult processing, complicated assembl...

AI Technical Summary

Problems solved by technology

However, the reflective system also has defects such as difficult processing, complicated assembly and adjustment, and center blocking. For laser light sources with small beam apertures, the reflective system is obviously not suitable

The processing and assembly technology of the transmission system is mature, and there is no central obstruction, but it is difficult to correct the chromatic aberration on the axis of the secondary spectrum, and it is difficult to shorten the length of the long focal length system

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