Optical: systems and elements – Compound lens system – Microscope
Patent
1999-10-08
2000-11-14
Nguyen, Thong
Optical: systems and elements
Compound lens system
Microscope
359857, 359861, G02B 2100, G02B 508
Patent
active
061477990
ABSTRACT:
A variable optical delay element that is physically compact introduces time delays to an applied optical signal. The variable optical delay element includes a pair of substantially parallel members, each having a linear reflective surface facing the reflective surface of the other member. An input lens secured to a first end of the first linear member collimates an optical beam launched by an input fiber while an output lens secured to a second member focuses the collimated optical beam onto an optical output fiber. A first actuator adjusts the offset relationship between the members in a direction parallel to the pair of members to designate the number of reflections of the collimated optical beam by the reflective surfaces before being received by the output lens. A second actuator adjusts the distance separating the linear reflectors. The optical signal is delayed by a predefined time interval by adjusting the offset positions of the members and the distance separating the members.
REFERENCES:
patent: 3741622 (1973-06-01), Cox
patent: 4103991 (1978-08-01), Kramer
patent: 5146368 (1992-09-01), Fink
patent: 5220463 (1993-06-01), Edelstein
patent: 6003997 (1999-12-01), Downes, Jr.
Agilent Technologie,s Inc.
Imperato John L.
Nguyen Thong
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