SU1021958A1 - High-speed cinema spectrograph - Google Patents

Abstract

A HIGH-SPEED ROGRAPH CINEMA, containing a series-mounted and optically coupled condenser, entrance shell, collimator lens, swivel mirror, diffraction grating, mask with at least one light hole, camera lens, sweep mirror, coaxial lenses, In order to improve the image quality of the spectrum, the surface of the diffraction grating is aligned with the mask.

Description

The invention relates to spectral instrumentation and can be used in high-speed technology. cinema spectrography.

Known are high-speed cinema spectrographs containing the collimator 5 part of the monochromator and a high-speed camera with image switching £ 1].

A disadvantage of high-speed cinema spectrographs is the bulkiness of the structure due to the inconsistency of the optical parameters of the monochromator and the camera.

Closest to the invention, the technical essence is a 15 high-speed cinema spectrograph containing a condenser, an entrance slit, a collimator lens, a rotary ed mirror, a diffraction grating, a mask with light holes, a camera lens, a sweep mirror, and a switching lens system ].

A disadvantage of the known high-speed cinema spectrograph is the presence of a certain distance between the diffraction grating and the mask, which leads to the vignetting of inclined diffracted beams. __

For condition ^JU Nogo uniform filling openings light beams diffracted mask area of the shaded portion of the diffraction grating must be greater than the light apertures of the mask. In this case, the light of the diffraction grating, as well as the condenser and collimator lens, is partially used for each diffracted beam, which reduces the image quality of the spectrum.

The purpose of the invention is improving the image quality of the spectrum.

This goal is achieved by the fact that in a high-speed cinema-45 spectrograph containing a condenser, an entrance slit, a collimator lens, a swivel mirror, a diffraction grating, a mask with at least one light aperture, a camera lens, a sweep mirror lenses, the surface of the diffraction grating is combined with the mask. __ The drawing shows a high-speed cinema spectrograph.

A high-speed cinema spectrograph contains in series a condenser 1, an entrance slit 2 installed in the focal plane of the condenser 1, a collimator lens 3 mounted at the focal length from the entrance slit 2, a swivel mirror 4, a diffraction grating 5, whose surface is aligned with mask b. The mask 6 has two light holes, which are the frames of the diffraction grating 5 and are optically coupled using a camera lens 7, tuned to infinity. The scanning mirror 8 is installed in the focal plane of the camera lens 7 with the entrance pupils of the switching lens system 9. The photosensitive film layer 10 is aligned with the focal surface of the switching lenses 9, which is optically conjugated with the focal plane of the camera lens 7.

High-speed cinema spectrograph works as follows.

The image from the radiation object by means of a condenser 1 is focused in the plane of the entrance slit 2, the collimator lens 3 is passed through and the diffraction grating 5 is directed at an incidence angle of 4.

The radiation spectrum for each cross-sectional point of the object cut out by the entrance slit 2 is constructed by means of a lens 7 on a rotating scan mirror 8, and then it is transferred to the film film 10 in the form of separate spectra using small switching lenses 9.

I.

The light holes of the mask 6 through the lens 7 are built in the entrance pupils of the commuting lenses 9 and, when the mirror 8 is rotated, performs a light shutter. Two light holes of the mask, dimensions 3x6.5 mm, are the frames of the diffraction grating 5 for each row of a double-row lens insert, the wavelengths are tuned by rotating the rotary mirror 8 around an axis parallel to the strokes of the diffraction grating 5.

The combination of the diffraction grating with the mask reduces aberrations and vignetting of oblique beams, fully allows the use of the aperture of the device, which improves the image quality of the spectra.

VNIIIPI Order 4025/31 Circulation 873 Signed:

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Branch of PPP Patent, Uzhgorod, Project 4,

Claims (1)

HIGH-SPEED CINEMA SPECTROGRAPH containing consecutively mounted and optically coupled condenser, input helix, collimator lens, rotary mirror, diffraction grating, mask with at least one light aperture, camera lens, development mirror, commutating lenses, characterized in that, in order to increase image quality of the Spectrum, the surface of the diffraction grating is combined with the mask.