Optical switching device
Optical system for focus state detection
Optical system for night-vision glasses
Optical transceiver with multiple communication modes
Optical transmission device
Optical transmission line by-pass relay
Optical transmission link for musical production
Optical transmission system with a pechan prism for equalizing o
Optical type encoder
Optical wave guide band edge sensor and method
Optical waveguide and method of propagating waves therein
Optical-fiber reference-value transmitter
Optical-to-electric image conversion system employing a cathode-
Optically addressable spatial light modulator
Optically controlled semiconductor waveguide interferometer appa
Optically coupled device with diffusely reflecting enclosure
Optically coupled remote control system
Optically coupled two-wire to four-wire hybrid lines
Optico-mechanical scanning device
Opto-acoustic telephone receiver