LIGHTING DEVICE FOR ENDOSCOPIC EQUIPMENT Russian patent published in 2001 - IPC

FIELD: medical equipment, in particular, endoscopic and ophthalmologic equipment, applicable in illuminators for equipment with fibrous light- emitting diodes. SUBSTANCE: lighting device has a power transformer, whose primary winding is connected to the leads for connection to the AC power mains, the beginning of the first secondary winding is connected via an AC controllable key to an incandescent lamp, and the end - to the vacant lead of the incandescent lamp. The device has a voltage transducer, rectifier, AC key, amplifier, illuminance regulator, comparison unit, saw-tooth voltage generator, adjusting resistor, control pulse shaper, time relay, emitter follower, RC-circuit, square pulse shaper, additional secondary winding of the power transformer and a secondary winding. EFFECT: enhanced quality and stability of image in endoscopic equipment. 1 cl, 6 dwg