Reflectometer and associated light source for use in a...

Details Reflectometer and associated light source for use in a... Reflectometer and associated light source for use in a...

2005-11-23

2009-11-10

Toatley, Jr., Gregory J (Department: 2877)

Optics: measuring and testing

Of light reflection

With diffusion

C250S494100, C362S249070

Reexamination Certificate

active

07616317

ABSTRACT:
A light source for a reflectometer which is used in a chemical analyzer includes a plurality of light emitting devices. Some of the light emitting devices emit light of different wavelengths. The light emitting devices are arcuately arranged about a circle having a predetermined radius. Adjacent light emitting devices are spaced from each other a predetermined distance. The light emitting devices are positioned to direct light emitted therefrom to an illumination plane. At least two, but preferably three or four, of the light emitting devices emit light of substantially the same wavelength and are illuminated simultaneously to provide a volume of substantially homogenous irradiance at the illumination plane.

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patent: 2003/0189831 (2003-10-01), Yoneda
patent: 2004/0019459 (2004-01-01), Dietz et al.

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