Optical element, optical light source unit and optical display device equipped with the optical light source unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 28, 2004
Grant Date -
Dec 27, 2001
app pub date -
Jun 15, 2001
filing date -
Jun 15, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical element comprises a fluorescence luminous element that emits fluorescent light when excited and a cholesteric filter disposed at the incident side of the fluorescence luminous element at which excitation light enters the fluorescence luminous element. The cholesteric filter comprises a cholesteric layer operative to transmit the excitation light and to reflect backward scattered fluorescent light traveling thereto so as to be integrated with fluorescent light directly coming out of the cholesteric filter.
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