Title:
【考案の名称】可変レーザービーム減衰器
Document Type and Number:
Japanese Patent JPH0615022
Kind Code:
U
Abstract:
A variable laser beam attenuator for typographical composing and printing machines is disposed in the optical axis of a laser light source emitting polarized light of only one polarization. A rotatable filter wheel having a plurality of absorption filters therein for obtaining a coarse adjustment is followed by a fine adjustment means comprising two plane-parallel glass plates disposed in a mutually symmetrically inclined manner in a holder for infinitely variable attenuation without deflection of the laser light beam. The inclination of the glass plates is selected such that the angle of laser beam incidence is approximately equal to the Brewster Angle. The holder is adapted to pivot together with the glass plates as a unit, about the optical axis.
Inventors:
Thomas herich
Michael Pratt
Michael Pratt
Application Number:
JP2734193U
Publication Date:
February 25, 1994
Filing Date:
May 25, 1993
Export Citation:
Assignee:
Rhinotype Gesellshaft Mitt Beschlenktel Haftung
International Classes:
B41B19/00; G02B5/30; G02B26/00; G02B26/02; (IPC1-7): G02B26/02; B41B19/00
Domestic Patent References:
| JPS4916000U | 1974-02-09 | |||
| JPS55124101A | 1980-09-25 | |||
| JPS559683A | 1980-01-23 |
Attorney, Agent or Firm:
Mitsuteru Soga (2 outside)
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