Title:
OPTICAL SHUTTER
Document Type and Number:
WIPO Patent Application WO2001037034
Kind Code:
A3
Abstract:
The present invention pertains to an optical shutter comprising an organic free compound, preferably a radical cation or a radical anion, wherein the organic free radical compound forms an oxidized or a reduced product having a change in absorption in a near-infrared or a visible wavelength region as a result of a photo-induced electron transfer reaction of the free radical compound. Preferably, the photo-induced electron transfer reaction occurs in less than 0.1 nanoseconds after absorption of photons by the free radical compound. Also, preferably, the change in absorption is reversible and occurs in less than 10 milliseconds. Also provided is an optical shutter of use as an optical switch in fiber optic communications, and, alternatively, for use in a laser protection device, a security protection system, and an eyewear device.
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Inventors:
CARLSON STEVEN A (US)
Application Number:
PCT/US2000/041909
Publication Date:
July 18, 2002
Filing Date:
November 02, 2000
Export Citation:
Assignee:
CARLSON STEVEN A (US)
International Classes:
G02B26/02; G02B26/04; G02F1/01; G02F1/061; G02F1/17; G02F1/29; G02F1/31; (IPC1-7): G02F1/01; G02F1/29; G11C13/04
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 12 25 December 1997 (1997-12-25)
PATENT ABSTRACTS OF JAPAN vol. 005, no. 188 (C - 081) 27 November 1981 (1981-11-27)
TOSHIHIKO NAGAMURA ET AL: "MOLECULAR ORIENTATION OF PHOTOGENERATED RADICALS IN NOVEL PHOTOELECTROCHROMIC LANGMUIR-BLODGETT FILMS", THIN SOLID FILMS, ELSEVIER-SEQUOIA S.A. LAUSANNE, CH, vol. 210 / 211, no. 1 / 2 PART 2, 30 April 1992 (1992-04-30), pages 617 - 619, XP000358431, ISSN: 0040-6090
PATENT ABSTRACTS OF JAPAN vol. 005, no. 188 (C - 081) 27 November 1981 (1981-11-27)
TOSHIHIKO NAGAMURA ET AL: "MOLECULAR ORIENTATION OF PHOTOGENERATED RADICALS IN NOVEL PHOTOELECTROCHROMIC LANGMUIR-BLODGETT FILMS", THIN SOLID FILMS, ELSEVIER-SEQUOIA S.A. LAUSANNE, CH, vol. 210 / 211, no. 1 / 2 PART 2, 30 April 1992 (1992-04-30), pages 617 - 619, XP000358431, ISSN: 0040-6090
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