US PATENT SUBCLASS 396 / 209
.~ Controlling optical filter

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

207  DF  EXPOSURE DATA FROM FILM CONTAINER {2}
209.~ Controlling optical filter

DEFINITION

Classification: 396/209

Controlling optical filter:

(under subclass 207) Subject matter wherein the exposure data

is used to regulate an optical path filter.

(1) Note. Intensity attenuation by such a filter may occur over a particular range of optical frequencies or be uniform over all frequencies.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

885+, for absorption filters, per se.