Gray optical standard

Details Gray optical standard Gray optical standard

2007-03-20

2007-03-20

Pham, Hoa Q. (Department: 2877)

Optics: measuring and testing

Standard

C356S243500, C250S252100

Reexamination Certificate

active

11193938

ABSTRACT:
A system for providing and using a gray optical standard is disclosed, the standard generally comprising a housing having a cavity and an at least partially transparent portion adjacent to the cavity for receiving the radiation emitted radiation by an optical instrument and a particulate material disposed in the cavity. The particulate material is a mixture of highly absorptive and highly reflective particles having a diameter of about 20 microns or less. In some embodiments, the at least partially transparent portion of the housing is modified to be highly diffusely scattering in the wavelength region of interest.

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Paul Geladi et al., Hyperspectral imaging: calibration problems and solutions, Jan. 29, 2004, 9 pages, © 2004 Elsevier B.V.

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