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Title: Optical apparatus using liquid crystals for shaping the spatial intensity of optical beams having designated wavelengths

Abstract

The spatial intensity profile of an optical beam of designated wavelengths, such as a laser beam, is shaped (the beam is apodized) by means of cholesteric liquid crystals of opposite chirality disposed successively along the path of the beam. The crystals have curved surfaces, which may be defined by a lens which defines the thickness of the liquid crystal fluid gap in a liquid crystal cell, so as to vary the selective reflection of the designated wavelength across the aperture of the beam. In this way, a soft aperture is provided. By using tandem cell pairs having liquid crystals of opposite chirality, but of different pitch, and with lenses of different curvature, beams of different wavelengths which are projected colinearly along the path may be individually tailored in spatial intensity profile. 11 figs.

Inventors:
;
Issue Date:
Research Org.:
The University of Rochester (Rochester, NY)
Sponsoring Org.:
USDOE
OSTI Identifier:
7255071
Patent Number(s):
4679911 A
Application Number:
PPN: US 6-718678
Assignee:
The University of Rochester (Rochester, NY) OAK; EDB-94-125363
DOE Contract Number:  
FC08-85DP40200
Resource Type:
Patent
Resource Relation:
Patent File Date: 1 Apr 1985
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; LASER RADIATION; BEAM SHAPING; BEAM PROFILES; LIQUID CRYSTALS; OPTICAL EQUIPMENT; CRYSTALS; ELECTROMAGNETIC RADIATION; EQUIPMENT; FLUIDS; LIQUIDS; RADIATIONS; 426002* - Engineering- Lasers & Masers- (1990-)

Citation Formats

Jacobs, S.D., and Cerqua, K.A. Optical apparatus using liquid crystals for shaping the spatial intensity of optical beams having designated wavelengths. United States: N. p., 1987. Web.
Jacobs, S.D., & Cerqua, K.A. Optical apparatus using liquid crystals for shaping the spatial intensity of optical beams having designated wavelengths. United States.
Jacobs, S.D., and Cerqua, K.A. Tue . "Optical apparatus using liquid crystals for shaping the spatial intensity of optical beams having designated wavelengths". United States.
@article{osti_7255071,
title = {Optical apparatus using liquid crystals for shaping the spatial intensity of optical beams having designated wavelengths},
author = {Jacobs, S.D. and Cerqua, K.A.},
abstractNote = {The spatial intensity profile of an optical beam of designated wavelengths, such as a laser beam, is shaped (the beam is apodized) by means of cholesteric liquid crystals of opposite chirality disposed successively along the path of the beam. The crystals have curved surfaces, which may be defined by a lens which defines the thickness of the liquid crystal fluid gap in a liquid crystal cell, so as to vary the selective reflection of the designated wavelength across the aperture of the beam. In this way, a soft aperture is provided. By using tandem cell pairs having liquid crystals of opposite chirality, but of different pitch, and with lenses of different curvature, beams of different wavelengths which are projected colinearly along the path may be individually tailored in spatial intensity profile. 11 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {7}
}