US PATENT SUBCLASS 374 / 130
.~.~.~ Optical system structure (e.g., lens)

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
120  DF  .~ In spaced noncontact relationship to specimen {3}
121  DF  .~.~ By thermally emitted radiation {11}
130.~.~.~ Optical system structure (e.g., lens) {1}
131  DF  .~.~.~.~> With radiation conducting element

DEFINITION

Classification: 374/130

Optical system structure (e.g., lens):

(under subclass 121) Subject matter including a specific limitation of an element which changes the direction of the radiation.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements, appropriate subclasses for optical modifying elements and systems, in general.