MD Laser power meter with the sensor unit in the shape of a Minidisc cartridge. The sensor can be inserted in a piece of MD equipment for laser power measurement without requiring any disassembly.
Abstract
A laser power meter of the present invention including a laser power sensor and a power meter module is used for measuring the power level of a laser source in a minidisc recorder/player. The laser power sensor includes a photodetector and a variable resistor electrically connected together and housed in a cartridge-like housing that is equivalent in dimension to a minidisc used in the minidisc recorder/player. The laser power sensor is inserted into the minidisc recorder/player like a regular minidisc, thus allowing laser power readings without disassembling the recorder/player.