The invention provides an optical modulator wherein appearance of radiation mode light can be suppressed to improve performances as a device. A transmitting end application is installed in a transmitting end apparatus of a sharing source. A motor rotates the screws via a worm gear. In addition, a light reflecting plate and an optical sheet are respectively disposed on the top and bottom surfaces of the light guide plate, on which light absorbing layers, for absorbing light that leaks from the light guide plate, are formed at both ends thereof. By such arrangements, it can effectively reduce the volume and the sensitivity of the lens system. Improved current sharing and regulation characteristics are obtained by coupling control terminals of the voltage regulators together which results in precise output voltages and proportional current production.