Chinese Academy of Sciences

Xinglong Chen

Shilie Pan

Fangfang Zhang

Xueling Hou

A calcium metaborate birefringent crystal and a preparation method and use thereof, the crystal having a chemical formula of CaBOand a molecular weight of 125.70, and belonging to the orthorhombic crystal system and space group Pbcn with unit-cell parameters a=11.60(4)Å, b=4.28(8)Å, c=6.21(6)Å, and Z=4, wherein the calcium metaborate birefringent crystal is a negative biaxial crystal with a transmission range of 165-3400 nm and a birefringence between 0.09-0.36; the crystal is applicable to infrared-visible-ultraviolet-deep ultraviolet bands, and is grown by a melt method, a flux method, a Bridgman method or a heat exchange method; the crystal obtained by the method of the present invention is easy to grow and easy to process; and can be used for making polarizing beam-splitting prisms.

Calcium metaborate birefringent crystal, preparation method and use thereof

The invention relates to a lithium metaborate crystal and a preparation method and use thereof. The crystal has a chemical formula of LiBO, a molecular weight of 49.75, and is a member of the monoclinic crystal system. The crystal has a P2/c space group and lattice constants of a=5.85(8) &#x212b;, b=4.35(7) &#x212b;, c=6.46(6) &#x212b;, &#x3b2;=115(5)&#xb0;, and Z=4. The crystal can be applied in wavelengths of infrared-visible-deep ultraviolet, and is grown by utilizing a melt crystallization method or a flux method. The crystal obtained using the method described in the invention is easily grown and processed, and can be used in the manufacture of a polarizing beam splitting prism such as a Glan prism, a Wollaston prism, a Rochon prism or a beam-splitting polarizer, and other optical components, enabling crucial applications in the fields of optics and communication.

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Urumqi, China

Xinglong Chen