Photonics Dictionary: P

An OLED display formed by creating an array of OLED pixels connected by intersecting anode and cathode conductors arranged in rows and columns. Electrical power is passed through selected pixels by...

A Peltier cooler, also known as a thermoelectric cooler (TEC) or thermoelectric module, is a solid-state device that uses the Peltier effect to transfer heat between two electrical junctions. It can...

A Darlington current amplifier consisting of two separate transistors, of which a phototransistor is the input device.

An input device for a computer that detects and reads the data, in the form of punched holes in cards, by light that is transmitted through the holes.

A system in which the electrical signal embedded within an audio input signal is converted to a modulated light pattern and recorded on film.

The photographic recording of data, in binary form, for storage in memory. Exposure is achieved by a cathode-ray tube or by modulating a continuous-wave laser beam with a Kerr cell, both relative to...

The ratio of emitted power to input power.