US PATENT SUBCLASS 356 / 330
.~.~ Having optical gating means

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

300  DF  BY DISPERSED LIGHT SPECTROSCOPY {10}
326  DF  .~ Utilizing a spectrometer {3}
330.~.~ Having optical gating means

DEFINITION

Classification: 356/330

Having optical gating means:

(under subclass 326) Subject matter wherein the entrance and exit means contain areas which alternately transmit or block the passage of light.