SU1478053A1 - Diffraction monochromator - Google Patents

Abstract

This invention relates to optical spectral instrumentation. The aim of the invention is to increase the resolution. Radiation from a distant object enters the concave diffraction grating 2 through the input aperture 1. Dispersed radiation is emitted by the output slit 3. Grid 2 is made with a variable distance between the strokes. The spectrum is scanned using mechanism 4. The angle 2V between the optical axis connecting the entrance diaphragm 1 and the grid 2 and the optical axis connecting the grid 2 and the output slit 3 does not exceed 40 °. The frequency N of the grating lines is determined by the formula N = (CV) / (λ _av ^. 10 ³ ), where λ _av is the wavelength of the middle of the working spectrum range

C = 0.8 ... 0.9. The resolution in the monochromator is increased by reducing the meridional coma. 2 Il.

Description

YU

WO 1500 1ZOO

FIG. J

thirty

40

so g #

1ZOO

900 600 C

-one

Claims (1)

Claim A diffraction monochromator containing optically coupled input diaphragm, a concave diffraction grating with a variable distance between the strokes, mounted with the possibility of rotation, and an output slit, as well as a spectrum scanning mechanism, kinematic coupled with a concave diffraction grating, characterized in that, for the purpose of increasing resolution, angle 2) between the optical axis on which the input diaphragm and the concave diffraction grating are located, and the optical axis on which the concave diffraction onnaya grating and the output slit does not exceed about 40, and the frequency of the strokes of the concave diffraction grating where p λ _C - mid-wavelength of the working spectrum band; 0 = 0.8-0.9.