Konica Minolta REGIUS 190, Service Manual

Page: 32 / 220

5
1.1 Principal Specifications
REGIUS MODEL 190 Service Manual Ver.1.00 2004.11.01
•
Main Scan Unit
•
Beam-Reception Unit
•
Erasing Unit
Method
Laser drive using polygon mirror technology
Incident Angle of Laser
Approximately 5º from the plate's normal
One-Line Read
Frequency
2 types; 7.54ms/line (133kHz), 5.20ms/line (192kHz)
f-
θθ
θ θ Lens 3 groups of 3 (f = 253.6 mm)
Tilt compensation using cylindrical mirrors
Effective Scan Ratio 82.8% ±49.7º)
No. of Polygon Faces
7 (inscribed circle diameter: 82ø)
Rotation Speed of
Polygon
2 types; 1,137rpm, 1,648rpm
Laser Wavelength
660nm
On-Plate Laser Inten-
sity
35mW or higher
Imaging beam
diameter100 100 ∫ or less (for both main and sub scanning)
Method
Condensing Beam guide + Condenser tube + Short photomulti-
plier
Beam Guide
Uses full re fl ection from acrylic plates
Condenser Tube
Ammonite condenser with multiple coatings on the inner surface
Excitation-beam elimi-
nation Realized using a excitation-beam cut fi lter
Method
Erasure by halogen lamps
Lamp Spec.
2 x 300W halogen lamps
Filter Spec. Cuts light in the photo-multiplier's sensitivity range