AGFA d-lab.3 Digital Compact Lab
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AGFA d-lab.3 Digital Compact Lab

AGFA d-lab.3 Digital Compact Lab AGFA d-lab.3 Digital Compact Lab

saal.group.com
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18.06.2014 Views

Repair Printer Intensity of the Laser Beam / AOM The intensity of the beams is influenced by the acousto-optical modulators (AOM) for each pixel as a function of the colour information. In the AOM a crystal in the blue/green light path of the laser is oscillated by a frequency. Depending on the amplitude of the oscillation, the crystal becomes more or less translucent and by this changes the intensity of the laser beam. The intensity of the red laser diode is regulated directly by the preceding electronic. dlabrd48 1 AOM LA_BE04 2 AOM LA_BE04 3 Red Laser diode LA_GS06 Polarisation Filters The maximum density is set by means of the polarisation filters. The polarisation filters are controlled by stepper motors. Beam Focusing The beams are focused by partially transparent mirrors and are projected on the paper by the rotating polygonal mirror and a guide mirror. Start of Exposure The sheet front edge detection is defined by the sensor BOP (2), the exposure start, by the sensor BOL (1). dlabr097 AGFA d-lab.3 2001-01-02 /PN 9009 6.3.59

Printer Repair Laser Sources Laser sources Wave length Power in the image plane Power at the monitor diode Red channel (Laser diode) 680,0 nm 850 µW ± 5% 264 µW ± 5% Green channel (Argon laser) 514,5 nm 320 µW ± 5% 550 µW ± 5% Blue channel (Argon laser) 458,0 nm 125 µW ± 5% 900 µW ± 5% Modulation All channels can be regulated by polarisation filters (setting accuracy 1,5% in the entire dynamic range. Red channel Direct current modulation of the Laser diode, definition of the time/time period (ref. BOL) for the suppression to calibrate the Feedback diode. Input signal 0-0,6 V on 50Ω Green and Blue channel Analogue AOM, input signal 0-0,6 V on 50Ω Laser Drift Gas lasers emit in general only a small percentage of their power as light, the major part is transformed to heat. Caution! The air exhaustion of the laser exhaust air at the back of the machine (5) must not be hindered because the service life of the laser tube drops if it gets too hot! 6 5 4 3 1 2 dlabr154 6.3.60 2001-01-02 /PN 9009 AGFA d-lab.3

Printer<br />

Repair<br />

Laser Sources<br />

Laser sources Wave length Power in the image<br />

plane<br />

Power at the<br />

monitor diode<br />

Red channel (Laser diode) 680,0 nm 850 µW ± 5% 264 µW ± 5%<br />

Green channel (Argon laser) 514,5 nm 320 µW ± 5% 550 µW ± 5%<br />

Blue channel (Argon laser) 458,0 nm 125 µW ± 5% 900 µW ± 5%<br />

Modulation<br />

All channels can be regulated by polarisation filters (setting accuracy<br />

1,5% in the entire dynamic range.<br />

Red channel<br />

Direct current modulation of the Laser diode, definition of the time/time<br />

period (ref. BOL) for the suppression to calibrate the Feedback diode.<br />

Input signal 0-0,6 V on 50Ω<br />

Green and Blue channel<br />

Analogue AOM, input signal 0-0,6 V on 50Ω<br />

Laser Drift<br />

Gas lasers emit in general only a small<br />

percentage of their power as light, the major part<br />

is transformed to heat.<br />

Caution!<br />

The air exhaustion of the laser exhaust air at the<br />

back of the machine (5) must not be hindered<br />

because the service life of the laser tube drops if it<br />

gets too hot!<br />

6<br />

5<br />

4<br />

3<br />

1<br />

2<br />

dlabr154<br />

6.3.60 2001-01-02 /PN 9009 <strong>AGFA</strong> d-<strong>lab.3</strong>

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