Title :
Evaluation of images from an image mode laser projection system
Author :
Firehammer, J.A. ; Crawford, G.P. ; Lawandy, N.M.
Author_Institution :
Div. of Eng., Brown Univ., Providence, RI, USA
Abstract :
Summary form only given. Image mode lasers, which consist of a voltage-controlled pixilated variable loss element placed inside a high-gain laser cavity, have been demonstrated as a feasible method for video projection display. Two methods of creating this cavity loss are examined: the scattering polymer-dispersed liquid crystal (PDLC), and the absorptive twisted nematic (IN) liquid crystal element. The effects of amplified spontaneous emission (ASE) and how they relate to the choice of the loss element are discussed. Evaluation and comparison of 1/4 VGA resolution lasing images to a commercial projection display is also presented.
Keywords :
electro-optical devices; laser cavity resonators; liquid crystal displays; optical images; optical information processing; optical losses; optical projectors; polymer dispersed liquid crystals; superradiance; video signal processing; 1/4 VGA resolution lasing images; absorptive twisted nematic liquid crystal element; amplified spontaneous emission; cavity loss; commercial projection display; high-gain laser cavity; image evaluation; image mode laser projection system; image mode lasers; loss element; scattering polymer-dispersed liquid crystal; video projection display; voltage-controlled pixilated variable loss element; Image resolution; Laser excitation; Laser modes; Liquid crystal displays; Liquid crystal polymers; Optical harmonic generation; Optical polarization; Optical scattering; Spontaneous emission; Valves;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.834435
