Light splitting device

Abstract

The invention discloses a light splitting device. The light splitting device comprises a first light splitting unit and a second light splitting unit; the first light splitting unit and the second light splitting unit each comprise a first reflecting surface and a second reflecting surface which are vertical to each other; incident light rays enters the first reflecting surface to form first reflected light rays, and the first reflected light rays enter the second reflecting surface to form second reflected light rays; the plane where the incident light rays and the first reflected light raysare located is a first incident plane; the reflectivity of the incident light rays with the polarization direction parallel to the first incident plane on the first reflecting surface and the reflectivity of the incident light rays with the polarization direction perpendicular to the first incident plane on the first reflecting surface are the first reflectivity and the second reflectivity respectively; the plane where the first reflected light rays and the second reflected light rays are located is a second incident plane; the reflectivity of the first reflected light rays with the polarization direction parallel to the second incident plane on the second reflecting surface and the reflectivity of the first reflected light rays with the polarization direction perpendicular to the second incident plane on the second reflecting surface are the third reflectivity and the fourth reflectivity respectively; the first reflectivity is equal to the third reflectivity; and the second reflectivity is equal to the fourth reflectivity. According to the technical schemes, the polarization characteristic of a light beam is not changed after the light beam is split.

Description

technical field [0001] Embodiments of the present invention relate to optical technologies, and in particular, to a spectroscopic device. Background technique [0002] In the optical system, especially in the test system, there is a need to test multiple parameters at the same time, so it is necessary to split the light into each test module. figure 1 is a schematic diagram of a spectroscopic scene in the prior art, refer to figure 1 , after the light exits from the light source, along the direction of beam transmission, the beam is split by the beam splitting element, and the beam enters each measurement module to realize simultaneous measurement of multiple modules. [0003] In the prior art, windows, beamsplitters, and beamsplitting prisms are commonly used spectroscopic devices. In the process of spectroscopic separation, due to the inherent properties of materials and coatings, the reflectivity of light with different polarization states will be different, which will ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, windows, beamsplitters, and beamsplitting prisms are commonly used spectroscopic devices. In the process of spectroscopic separation, due to the inherent properties of materials and coatings, the reflectivity of light with different polarization states will be different, which will Introducing a problem, the light splitting will affect the test of the polarized light characteristics, resulting in the difference between the degree of polarization after the splitting and the degree of polarization before the splitting, which affects the measurement results

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