LASERSTRAHL-INDUZIERTES FARBDRUCKEN.

摘要

Coloured prints are produced by a laser unit that uses a transfer band (2) containing microcapsules of cyan (C), magenta (M) and yellow colour pigments. A laser diode (10) generates an emission that is focused (11) on to a selected capsule. Three detectors (114-116) respond to the fluorescent emissions of different wavelengths that are given off from the capsules. The detector outputs are received by a logic circuit that signals the drive stage (8) of the diode to indicate the presence of a specific colour capsule. The drive stage causes the laser to operate with sufficiently high power to cause the ink transfer to take place.