Large-diameter compact Sorey-Barbinet compensator device

Abstract

The disclosure provides a large-diameter compact Soley-Babignet compensator device, including: a crystal optical element, a crystal optical element moving part, a housing, a base and an actuator, and the actuator is installed on the side of the housing On the block, the actuator pushes the horizontal bar on the moving part of the crystal optical element, and drives the long wedge and the bearing surface to make relative motion along the central axis of the housing, so that the total thickness of the long wedge and the short wedge is relatively the thickness of the parallel plate changes, thereby changing the polarization state of the light beam transmitted from the through-hole of the housing. The disclosed actuator is installed on the side mounting block on the housing of the Soley-Babignet compensator device, effectively reducing the length of the compensator.

Description

technical field [0001] The disclosure relates to the field of precise polarized light regulation and measurement, and in particular to a large-aperture compact Sorey-Babignet compensator device. Background technique [0002] The Sorey-Babignet compensator consists of a parallel plate, a short optical wedge and a long optical wedge, all of which use birefringent crystal materials, in which the short optical wedge and the parallel plate are fixed together by glue or optical glue , the long optical wedge can move continuously relative to the short optical wedge through the actuator, thereby changing the delay of the transmitted beam, which is equivalent to a dynamic wave plate. The classic design of a compensator consists of a birefringent long wedge and a fixed wedge mounted on a compensator. It has the advantages of uniform and continuously adjustable retardation in the entire clear aperture. It has important applications in the fields of spectral analysis and polarization ...

AI Technical Summary

Problems solved by technology

[0003] In some applications of polarized optics, the transmitted beam has a large aperture, which requires a large-aperture compensator (for example, the aperture is greater than 25mm). In order to achieve such a large aperture, the moving distance of the long wedge is usually required to be three times the aperture of the light, that is Requires a large stroke actuator, which results in a bulky compensator

In addition, in order to adjust the angle between the incident ray polarized light and the crystal optical axis, it is usually necessary to add a rotating frame, which will further increase the volume of the compensator

However, in a highly integrated optical system, the volume of each component is strictly limited, so the compensator must have a large aperture and a compact structure

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