Convex grating Offner structure double-slit multispectral system

Abstract

The invention relates to a convex grating Offner structure double-slit multispectral system which comprises a double-slit component, a main reflector, a convex grating, an imaging objective lens and a focal plane detector, wherein light going out from a front telescope system or an optical fiber outgoing telecentric system enters from the incoming slit of the double-slit component in a certain direction; the incoming light is reflected by the main reflector and then comes into the convex grating in a form of convergence light beams, the incoming light is reflected by the convex grating to achieve spectrum light splitting, and the convergence light beams are changed into divergent light beams at the same time; imaging is performed by the imaging objective lens; the focal plane detector is located on the focal plane of the image objective lens and collects images formed on the imaging objective lens.

Description

technical field [0001] The invention relates to the field of optics, in particular to a convex grating Offner structure double-slit multispectral system. Background technique [0002] The spectrometer system is the core of remote sensing spectroscopic instruments, especially those that have high quality spectral imaging and continuum imaging. Traditional spectrometer structures mainly include Czerny-Turner structure, Offner structure, crossed Czerny-Turner structure, Rowland circle structure, etc. These structures can well meet the needs of instruments with narrow band range or low spectral resolution. Design index requirements. However, for hyperspectral and hyperspectral systems with wide spectral range and high spectral resolution, only the form of dichroic mirrors can be used to divide the spectral range into multiple segments, and the system with the above structure is complex in structure and bulky. [0003] Space-borne imaging spectrometers, space-based imaging spec...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of existing spectrometers with large volume and weight, which cannot be applied to occasions where space resources are relatively tight, so as to provide a multi-spectral system with small volume, light weight and wide application range

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