Variable optical attenuator and ranging apparatus using the...

Details Variable optical attenuator and ranging apparatus using the... Variable optical attenuator and ranging apparatus using the...

2007-08-07

2009-06-09

Font, Frank G (Department: 2883)

Optical waveguides

With optical coupler

Input/output coupler

C385S140000, C385S013000, C356S003000, C356S005100

Reexamination Certificate

active

07546008

ABSTRACT:
A variable optical attenuator for adjusting a power of light which is output from an output end of a first optical fiber and is to be led to an input end of a second optical fiber, includes a reflection member which reflects the light output from the output end of the first optical fiber, a density filter which transmits the light reflected from the reflection member and controls the power of the light which is transmitted by the density filter depending on a light-transmitting position on the density filter, and an optical member which reflects the light transmitted by the density filter to lead the light to the reflection member. The reflection member is disposed tiltably, the power of the light transmitted by the density filter attenuates along a direction in which the light-transmitting position is changed, and the light-transmitting position of the light is changed by tilting the reflection member.

REFERENCES:
patent: 6137941 (2000-10-01), Robinson
patent: 6243507 (2001-06-01), Goldstein et al.
patent: 6292616 (2001-09-01), Tei et al.
patent: 6356344 (2002-03-01), Ohishi et al.
patent: 6614958 (2003-09-01), Schmidt
patent: 6636682 (2003-10-01), Wang et al.
patent: 2003/0026582 (2003-02-01), In'T Hout et al.
patent: 1 219 973 (2002-07-01), None
patent: 2000-162517 (2000-06-01), None
patent: 2004-347663 (2004-12-01), None
European Patent Office, European Search Report for European Patent Application No. EP 07 01 5465, Dec. 13, 2007, European Patent Office, Munich, Germany.

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