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Title: Optical polarizer material

Abstract

Several crystals have been identified which can be grown using standard single crystals growth techniques and which have a high birefringence. The identified crystals include Li.sub.2 CO.sub.3, LiNaCO.sub.3, LiKCO.sub.3, LiRbCO.sub.3 and LiCsCO.sub.3. The condition of high birefringence leads to their application as optical polarizer materials. In one embodiment of the invention, the crystal has the chemical formula LiK.sub.(1-w-x-y) Na.sub.(1-w-x-z) Rb.sub.(1-w-y-z) Cs.sub.(1-x-y-z) CO.sub.3, where w+x+y+z=1. In another embodiment, the crystalline material may be selected from a an alkali metal carbonate and a double salt of alkali metal carbonates, where the polarizer has a Wollaston configuration, a Glan-Thompson configuration or a Glan-Taylor configuration. A method of making an LiNaCO.sub.3 optical polarizer is described. A similar method is shown for making an LiKCO.sub.3 optical polarizer.

Inventors:
 [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
872485
Patent Number(s):
5945037
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01D - COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
optical; polarizer; material; crystals; identified; grown; standard; single; growth; techniques; birefringence; linaco; likco; lirbco; licsco; condition; leads; application; materials; embodiment; crystal; chemical; formula; 1-w-x-y; na; 1-w-x-z; rb; 1-w-y-z; cs; 1-x-y-z; z; crystalline; selected; alkali; metal; carbonate; double; salt; carbonates; wollaston; configuration; glan-thompson; glan-taylor; method; described; similar; shown; metal carbonates; crystalline material; alkali metal; single crystal; single crystals; chemical formula; metal carbonate; metal carbon; similar method; /252/359/423/

Citation Formats

Ebbers, Christopher A. Optical polarizer material. United States: N. p., 1999. Web.
Ebbers, Christopher A. Optical polarizer material. United States.
Ebbers, Christopher A. Fri . "Optical polarizer material". United States. https://www.osti.gov/servlets/purl/872485.
@article{osti_872485,
title = {Optical polarizer material},
author = {Ebbers, Christopher A},
abstractNote = {Several crystals have been identified which can be grown using standard single crystals growth techniques and which have a high birefringence. The identified crystals include Li.sub.2 CO.sub.3, LiNaCO.sub.3, LiKCO.sub.3, LiRbCO.sub.3 and LiCsCO.sub.3. The condition of high birefringence leads to their application as optical polarizer materials. In one embodiment of the invention, the crystal has the chemical formula LiK.sub.(1-w-x-y) Na.sub.(1-w-x-z) Rb.sub.(1-w-y-z) Cs.sub.(1-x-y-z) CO.sub.3, where w+x+y+z=1. In another embodiment, the crystalline material may be selected from a an alkali metal carbonate and a double salt of alkali metal carbonates, where the polarizer has a Wollaston configuration, a Glan-Thompson configuration or a Glan-Taylor configuration. A method of making an LiNaCO.sub.3 optical polarizer is described. A similar method is shown for making an LiKCO.sub.3 optical polarizer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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Works referenced in this record:

X-ray study of low and high symmetry phases of LiNaCo3
journal, June 1995