초록 ▼

A photoelectric scanner system includes photosensors (10), an amplifier (15), and a demodulator (17), and functions to produce an output signal indicative of when light signals of a predetermined intensity are being received by the photosensors. An alignment indicator control circuit (20) is connect

A photoelectric scanner system includes photosensors (10), an amplifier (15), and a demodulator (17), and functions to produce an output signal indicative of when light signals of a predetermined intensity are being received by the photosensors. An alignment indicator control circuit (20) is connected to receive the amplified light intensity signals, and functions to produce a repetitive alignment indicating signal whose frequency is generally proportional to the intensity of the received light signal. The signals are applied to an alignment indicator which, in the preferred embodiment, is a light emitting diode, so that the LED flashes at a frequency indicative of the degree of alignment of the system, enabling an operator to accurately align the photoelectric scanning system with reference to the flash rate of the alignment indicator.

대표청구항 ▼

Photoelectric measuring and indicating apparatus, comprising: light responsive means for receiving light and producing an intensity signal indicative of the intensity of the received light; control means connected to receive said intensity signal and operative in response thereto to produce an outpu

Photoelectric measuring and indicating apparatus, comprising: light responsive means for receiving light and producing an intensity signal indicative of the intensity of the received light; control means connected to receive said intensity signal and operative in response thereto to produce an output having a frequency that varies with the intensity of the received light; and an indicator connected to receive said output and operative in response thereto to produce a repetitive indication synchronous with said output frequency whereby the intensity of the received light may be discerned.