SU939933A1 - Multi-beam interferometer with lateral beam input - Google Patents

Description

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The invention relates to optical interferometry and can be used in high-resolution spectral instruments to enhance the monochromaticity of radiation, for example, in dispersive resonators of laser spectrometers.

Interferometers with side entrance of beams are known, containing a reflective plate of piston thickness located at a large angle to the incident input radiation l.

The disadvantage of such devices is the significantly increased aperture of the output beam compared to the entrance aperture, which requires the use of special devices to combine the rays and ensure their interference.

The closest in technical essence to the present invention is a multi-beam interferometer with a side entrance of the rays, which contains an inclined plane-parallel plate with a partially reflecting surface and a flat reflector 2.

In the known device, the combination of rays and their interference takes place in the focal plane of the lens mounted at the exit of the device. At the same time, if the analyzed radiation contains several spectral components, then the contrast of the interference pattern due to one frequency of the spectrum will be small due to the superposition of the radiation of the remaining non-interfering frequencies of the spectrum. This leads to the need for additional monochromatization.

15 to increase the contrast and increase the signal-to-noise ratio, which is achieved by complicating the optical design.

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Claims (2)

 1. Vasiliev, L.A., Ershov, I.V. IN- 2. Skokov I.V. Multibeam interferometer with diffraction grating- ferometers. P., | yow, with. er;