A wide-spectrum confocal detection optical system with switchable wavelength

Abstract

The invention relates to a wide-band confocal detection optical system with a switchable band. The confocal detection optical system is composed of five separate spherical lenses and parallel plate glass; the sequence of optical materials of the five separate spherical lenses is ZK10, ZF6, ZK6 (cemented doublet), LAF5, ZK6 and ZF6; the appearances of the five separate spherical lenses are sequentially a convex-concave positive lens, a negative and positive cemented doublet, the convex-concave positive lens, the convex-concave positive lens and a concave-convex negative lens; the parallel flat glass material is common glass K9; the parallel flat glass is arranged between a fifth shot and a CCD (charge coupled device) target surface; the used wave band is selected for switching the parallel flat glass, and a diaphragm is fixed between the third spherical lens and the fourth spherical lens. Compared with the traditional optical system, the technical problem that no confocal detection optical system with the switchable wide band exists at present is solved, and the wide-band confocal detection optical system has the characteristics of being low in cost, easy to ensure the machining precision and the like.

Description

【Technical field】 [0001] The present invention relates to a broad-spectrum confocal detection optical system, in particular to a confocal optical system with a wide-spectrum wavelength range of 450-950nm and a spectral range switchable between 450nm-700nm and 760-950nm, which can be used as an independent It is especially suitable for the optical system of target detection in misty weather. 【Background technique】 [0002] Most television imaging detection systems only respond to imaging in the visible light band, and are only suitable for target detection under standard visibility atmospheric conditions. In foggy days with low visibility, the atmospheric transmittance in the visible light band drops sharply, resulting in a decrease in the target energy received by the entire detection system, which directly affects the detection capability of the target. In order to solve the problem of detecting targets in misty weather, near-infrared lenses have appeared in recent years, ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a wide-band switchable confocal detection optical system, which solves the problem that there is currently no wide-band switchable confocal detection optical system The technical problems of the system, and the selection of commonly used glass materials to achieve the purpose of wide-spectrum confocal, not only reduces the cost, but also easy to ensure processing accuracy

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