Apparatus for lengthening the path of a light beam

Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface

Reexamination Certificate

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C359S861000, C359S637000

Reexamination Certificate

active

06873468

ABSTRACT:
The invention is an apparatus for lengthening the path of a light beam. The apparatus includes an at least partially enclosed chamber having a first opening and a second opening. A first reflective surface is disposed within the chamber and is obliquely oriented with respect to an incoming path of the beam. The beam reflects off of the first reflective surface after the beam enters the chamber through the first opening. Second and third reflective surfaces are disposed within the chamber and are generally parallel to the incoming path of the beam. The beam is reflected a plurality of times between the second and third reflective surfaces after the beam is reflected by the first reflective surface. A fourth reflective surface is disposed within the chamber and is obliquely oriented with respect to the incoming path of the beam. The fourth reflective surface directs the beam through the second opening after the beam has been reflected a plurality of times between the second and third reflective surfaces. The apparatus may be used for amplifying the lateral deflection of a laser beam in an optical analog-to-digital converter.

REFERENCES:
patent: 3669545 (1972-06-01), Gilbly
patent: 4385237 (1983-05-01), Drukaroff et al.
patent: 5453877 (1995-09-01), Gerbe et al.
patent: 6003997 (1999-12-01), Downes, Jr.
patent: 6199990 (2001-03-01), Chee et al.

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