Steinar A Larsen

US Patent:

60139110, Jan 11, 2000

Filed:

Mar 2, 1998

Appl. No.:

9/033463

Inventors:

Earl Roger Hibbard - Arroyo Grande CA
James A. Cashin - San Luis Obispo CA
Gordon Henry Jennings - San Luis Obispo CA
Bevan Wright - La Palma CA
Steinar Larsen - Los Angeles CA

Assignee:

Ultra Stereo Labs Inc. - San Luis Obispo CA
Christie, Inc. - Cypress CA

International Classification:

G01J 132
G03B 2132

US Classification:

250205

Abstract:

The present invention is a system and method to quickly and accurately measure the luminance and luminance distribution of a light on the surface of an object so that the position of the lamp can be adjusted relative to the projector optics to obtain the best luminance available for that object. A scanning light receiver, which produces an optical image of the object whose luminance is to be tested, is set up so that it may view a substantial portion of the surface of the object. The light receiver is connected to a analyzer and control unit ("ACU") to which it sends an electronic image representing the reflected luminance of the surface during each scan. The reflected light that is detected by the light receiver is then analyzed by the ACU to determine the luminance levels and distribution across a substantial portion of the surface by measuring the voltage of each pixel detected by the light receiver measured against the voltage produced by a black level. Once this analysis is complete, the ACU sends the results to a driver interface unit which is connected to a light source position controller in the projector which continuously adjusts the position of the light source relative to the projector optics until optimal luminance and luminance distribution is achieved across the viewing surface. For example, using the method and system of the present invention, the position of the lamp continually and automatically may be fine tuned until optimum luminance is achieved.

US Patent:

50549090, Oct 8, 1991

Filed:

Nov 26, 1990

Appl. No.:

7/619932

Inventors:

Steinar A. Larsen - Los Angeles CA

Assignee:

Christie Electric Corp. - Torrance CA

International Classification:

G03B 2100

US Classification:

352198

Abstract:

A lamp housing for a motion picture projector which provides for moving the projection lamp forward and backward, up and down, and side to side, for changing the position of the lamp with respect to the focusing reflector and the film aperture. A control for automatically setting the lamp at two preselected focusing locations. Manual adjustment for moving the lamp in all three directions and remote electrical control means for moving the lamp in all three directions.