359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
237 | DF | OPTICAL MODULATOR {3} |
298 | DF | .~ Light wave directional modulation (e.g., deflection or scanning is representative of the modulating signal) {5} |
315 | DF | .~.~ Electro-optic {5} |
318 | .~.~.~ By reflection |