Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2007-08-14
2007-08-14
Le, Que T. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S239000
Reexamination Certificate
active
11282511
ABSTRACT:
A system for calibrating a sensor in a vehicle, such as a space capsule or other space borne apparatus, uses an expandable integrating sphere. A sensor in the vehicle measures the energy from an electromagnetic energy source within the integrating sphere through a calibration window. The expandable fluid impermeable integrating sphere expands when filled with a fluid, such that when filled with the fluid, its interior is viewable through the calibration window. The system includes a source of fluid to fill the integrating sphere and a fluid regulator coupled to the vehicle to determine when to supply the fluid to the integrating sphere to maintain an appropriate gas pressure level with the integrating sphere.
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patent: 6927850 (2005-08-01), Snail et al.
“Spectral Radiance of a Large-Area Integrating Sphere Source”, James H. Walker et al., Journal of Research of the National Institute of Standards and Technology, vol. 100, No. 1, Jan.-Feb. 1995, pp. 37-41.
Alkov Leonard A.
Le Que T.
Raytheon Company
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