Light system

Details Light system Light system

2005-05-17

2005-05-17

O'Shea, Sandra (Department: 2875)

Illumination

Light source and modifier

C362S302000, C362S303000, C362S350000

Reexamination Certificate

active

06893145

ABSTRACT:
An X-ray localizer light system comprises: a long life X-ray localizer light source; an optical concentrator, the light source being situated at a first focal spot, the optical concentrator being configured for concentrating X-ray localizer light from the light source to a second focal spot; and an opaque shield having an aperture therein situated proximate to the second focal spot and being of such a geometrical shape so as to maximize light throughput while meeting light field edge contrast requirements. In another light system, the optical concentrator comprises a reflector comprising a quasi-ellipsoidal portion within which the light source is situated, a cylindrical portion situated between the quasi-ellipsoidal portion and the shield for reflecting stray light, a back reflector portion situated proximate to the shield, and a centrally-mounted portion situated between the aperture and the light source for directing back-reflected light in the direction of the aperture.

REFERENCES:
patent: 2955205 (1960-10-01), Camfferman
patent: 3851165 (1974-11-01), Beck et al.
patent: 4167675 (1979-09-01), Stodberg et al.
patent: 4502147 (1985-02-01), Michaels
patent: 4521905 (1985-06-01), Hosokawa
patent: 4891739 (1990-01-01), Yasuda
U.S. Patent 4,979,203 Iss. by Suckewer, et al, 378/206, cited by Examiner in the Parent Case 09/683,895 on Form PTO-892.

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