Lichtregelsysteem met meetorgaan voor het meten van de lichtopbrengst van een lichtbron.

摘要

A memory (12) holds a signal which is proportional to the required light output. The actual light output from the tube (3) is sensed (5) by a light dependent resistor. The sensor output is compared (8) with the demanded level. The comparator output (7) is used to operate a controllable current source which supplies the tube. The circuit includes a cathode starter sensor (14).