.~.~ Including particular grating characteristic {7}
572
.~.~.~ Reflection grating (e.g., retrodirective)
DEFINITION
Classification: 359/572
Reflection grating (e.g., retrodirective):
(under subclass 569) Subject matter wherein the grating reflects a desired wave while at the same time allowing one or more waves to pass freely.
(1) Note. A reflection grating reflects the desired wave whereas a "transmission" grating passes the diffracted light through the grating in the same general direction as the incident light.
(2) Note. Aluminizing of a grating will cause it to be a reflecting grating.
(3) Note. Reflection back in the opposite direction to the incident light would be considered retrodirective.
SEE OR SEARCH THIS CLASS, SUBCLASS:
529+, for 3-corner retroreflectors (i.e., cube corner, trihedral or triple reflector type).
838+, for optical mirrors and other reflecting elements.
SEE OR SEARCH CLASS 342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),
7, for radio frequency corner reflectors which are retrodirective.
