US PATENT SUBCLASS 356 / 137
.~.~ Plural prisms


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

128  DF  REFRACTION TESTING (E.G., REFRACTOMETERS) {5}
135  DF  .~ Prism engaging specimen {2}
137.~.~ Plural prisms


DEFINITION

Classification: 356/137

(under subclass 135) Subject matter wherein there is a second optical member usually a prism associated with the first prism and the fluid or solid medium to be examined, and wherein the light is transmitted through the second optical member to cause the light to be dispersed before it enters the medium and the first prism.

(1) Note. Included herein are Abbe type refractometers.