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Modularized split Sagnac interferometer

A split type, interferometer technology, applied in the direction of interference spectroscopy, instruments, scientific instruments, etc., can solve the problems of insufficient compact structure, poor stability and repeatability, poor adaptability, etc., and achieve compact structure, high stability and repeatability , good adaptability to the space environment

Inactive Publication Date: 2010-10-27
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

Although this combination method is simple to process and easy to adjust and maintain, its structure is not compact enough, its stability and repeatability are poor, and its adaptability to mechanical and temperature environments such as vibration and shock is also poor, so it is not suitable for airborne and In the spaceborne Fourier transform imaging spectrometer

Method used

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  • Modularized split Sagnac interferometer
  • Modularized split Sagnac interferometer
  • Modularized split Sagnac interferometer

Examples

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Embodiment Construction

[0027] Modular split type Sagnac interferometer of the present invention, its preferred embodiment is:

[0028] It consists of a cubic prism made of two triangular prisms and two reflecting mirrors. The upper and lower non-transparent surfaces of the cubic prism are respectively bonded with glass backing plates, and one of the glass backing plates is equipped with a metal mirror seat to form a cubic prism assembly. The two reflectors are respectively packed into respective metal frames to form two groups of reflector assemblies; a box is also included, and the box is provided with mounting holes for the cubic prism assembly and the two groups of reflector assemblies; The cubic prism assembly and the two sets of reflector assemblies are loaded into the corresponding installation holes on the box respectively to form a modular split Sagnac interferometer.

[0029] In the described cubic prism assembly:

[0030] The material of the two glass backing plates is the same as that of...

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Abstract

The invention discloses a modularized split Sagnac interferometer, comprising a block prism formed by gluing two blocks of prisms, and two reflecting mirrors; the upper and lower non-transmission surfaces of the block prism are respectively bonded with a glass base plate, wherein the glass base plate at one surface is mounted with a metal mirror seat to form a cubic prism component; and the two reflecting mirrors are respectively installed into respect metal mirror frame to form two groups of reflecting mirror assemblies. The Sagnac interferometer also comprises a box body which is provided with installation holes for the cubic prism component and the two groups of reflecting mirror assemblies; and the cubic prism component and the two groups of reflecting mirror assemblies are respectively installed in corresponding installation holes on the box body to form the modularized split Sagnac interferometer. The modules are combined together to form the whole interferometer with high stability, which is in particular suitable for being applied in airborne or spaceborne Fourier transform imaging spectrometers. The modularized split Sagnac interferometer has compact structure, good processing and resetting manufacturability, high stability and repetition accuracy, and good adaptability to space environment.

Description

technical field [0001] The invention relates to a Sagnac interferometer, in particular to a modular split Sagnac interferometer. Background technique [0002] The Sagnac interferometer is a transverse shearing interferometer with a triangular common optical path. It consists of a beam splitter and two mirrors. The two mirrors are placed asymmetrically with respect to the beam splitter, and can direct a beam of incident parallel light along a direction perpendicular to the The direction of the optical axis is cut into two beams of coherent light parallel to each other. The optical path difference of the coherent light is related to the shear amount of the Sagnac interferometer and the angle of incidence of the incident light, so the Sagnac interferometer is widely used in interferometry and imaging spectrometers as a splitting element. [0003] Such as figure 1 As shown, the principle of the Sagnac interferometer is: S in the figure is a slit, and the parallel beams emitted...

Claims

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Application Information

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IPC IPC(8): G01J3/45G01J3/02
Inventor 袁艳相里斌李立英李飞李思远
Owner BEIHANG UNIV
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