Optics: measuring and testing – Photometers – Integrating spheres
Patent
1998-12-23
2000-03-21
Font, Frank G.
Optics: measuring and testing
Photometers
Integrating spheres
356446, 250228, G01J 104
Patent
active
060409045
ABSTRACT:
An apparatus for measuring diffuse optical transmission density of a photographic films sample uses two integrating spheres and a diffuse light source. Light from the light source is transmitted through a first light modulation system into the first integrating sphere. Light from the first integrating sphere is transmitted through a second light modulation system into the second integrating sphere. A fixed monochromator receives light at an exit port of the second integrating sphere. The light modulation systems take the form of adjustable diaphragms which allow for the modulation of the uniform radiance area located between the two integrating spheres and maintains the geometric and spectral conditions relating to the illumination of the sample located at the output port of the second integrating sphere.
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Fallet Eric L.
Goodwin Michael R.
Hahm Timothy P.
Bocchetti Mark G.
Eastman Kodak Company
Font Frank G.
Lauchman Layla
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