Laser sensitometer

Details Laser sensitometer Laser sensitometer

2005-06-07

2005-06-07

Smith, Zandra V. (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of photographic film

C356S432000

Reexamination Certificate

active

06903824

ABSTRACT:
An optical apparatus. More particularly, a laser sensitometer. The apparatus comprises: a polarized light source adapted to provide a Gaussian beam of light directed along an optical axis; a rotatable polarizer disposed in the optical axis adapted to vary an intensity of the beam of light, the polarizer being rotatable about the optical axis; and a rotatable polygon disposed in the optical axis, the polygon being rotatable about an axis perpendicular to the optical axis.

REFERENCES:
patent: 3677653 (1972-07-01), Hocker et al.
patent: 4891817 (1990-01-01), Duarte
patent: 5053619 (1991-10-01), Arimoto
patent: 5255069 (1993-10-01), Duarte
patent: 5764363 (1998-06-01), Ooki et al.
patent: 5786911 (1998-07-01), Tawa et al.
patent: 5838239 (1998-11-01), Stern et al.
patent: 6236461 (2001-05-01), Duarte

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