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Polarized prism made of yttrium vonadate crystal

A polarizing prism and yttrium vanadate technology, applied in prisms, polarizing elements, etc., can solve the problems of difficult to obtain crystals, low crystal utilization rate, high price, etc., and achieve the effect of simple bonding and fixing and detection process

Inactive Publication Date: 2008-10-29
青岛海泰光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using calcite to make polarizing prisms is very expensive due to the following reasons: 1) It is difficult to obtain crystals of sufficient size for optical applications
2) Strong cleavage leads to high scrap rate
3) Mohs hardness is only 3, not easy to polish
Therefore, when using it to make a prism, in order to obtain a certain orientation, it is necessary to cut off the head and tail of the calcite crystal, and the crystal utilization rate is low.
In addition, the spectral transmission range of calcite is 0.35-2.3 μm, and the damage threshold is low, which limits its application range.

Method used

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  • Polarized prism made of yttrium vonadate crystal
  • Polarized prism made of yttrium vonadate crystal

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Embodiment Construction

[0012] Now enumerate typical embodiment of the present invention:

[0013] YVO that can be pulled along the optical axis and has a large enough diameter 4 The crystal is cut perpendicular to the optical axis, and its diameter and cutting thickness depend on the needs of the user; it is cut into two symmetrical halves first, so that each half has five faces AB, BC, CD, DE, EA, and has the angle and Shape, the three larger surfaces AB, BC and DE are processed and polished. Then, the processed two prisms are bonded and fixed according to the above-mentioned requirements of leaving an air gap and jumping angle. The incident surface AB and the exit surface A'B' are coated with an anti-reflection film using a wavelength to improve the transmittance of the prism; finally, the polarizing prism is installed in a rotatable and two-dimensionally adjustable adjustment frame.

[0014] A layer of air gap should be reserved between the two polished surfaces of DE and E'D' of the two prisms...

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Abstract

A polarizing prism mad eof YVO4 crystal features that its angle theta must be greater than alpha e but less han alpha o to ensure full reflection of slow light on air gap interface, a high-safety polarizing angle beta must exist to ensure complete linear polarization of outgoing light, and the fast light must have the transmission rate at air gap interface as high as passible. Its advantages are with transmission range, great birefringence, high optical uniformity, low temp coefficient, and high hardness.

Description

technical field [0001] The invention belongs to the field of material selection and structural design of optical elements, in particular to the use of a yttrium vanadate (YVO 4 ) crystal to make a structural design of a polarizing prism suitable for high-power laser applications. Background technique [0002] At present, in the application of optical technology in the visible and near-infrared spectral range, the polarizing prisms commonly used are almost all made of calcite crystals. However, the use of calcite to make polarizing prisms is very expensive due to the following reasons: 1) It is difficult to obtain crystals of sufficient size for optical applications. 2) Strong cleavability leads to high rejection rate. 3) Mohs hardness is only 3, not easy to polish. 4) Calcite is a rhombohedron, and among the eight vertex angles, only three face angles of two vertex angles are obtuse angles, and its optical axis is parallel to the bisecting line of these two vertex angles....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/04G02B5/30
Inventor 黄呈辉张戈黄祥金沈鸿元陈振强黄凌雄
Owner 青岛海泰光电技术有限公司
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