Laser plate making apparatus

Details Laser plate making apparatus Laser plate making apparatus

1994-09-21

1996-09-17

Sugarman, Scott J.

Optical: systems and elements

Lens

Anamorphic

369112, 369122, G02B 1310, G11B 700

Patent

active

055574653

ABSTRACT:
A laser plate making apparatus is disclosed for forming a press plate from a form plate sheet. The apparatus includes a laser light source for providing a laser beam, a collimator lens, an objective lens and an anamorphic prism. The laser light source serves to emit a laser beam onto the form plate sheet through the collimator lens, the objective lens and the anamorphic prism. The anamorphic prism serves to shape the laser beam such that even if a focal stripe width is made small the focal depth is not substantially shortened.

REFERENCES:
patent: 4333173 (1982-06-01), Yonezawa et al.
patent: 5007713 (1991-04-01), Yoshifusa et al.
patent: 5016237 (1991-05-01), Nakamura et al.
patent: 5200850 (1993-04-01), Iizuka et al.
patent: 5258989 (1993-11-01), Raven
patent: 5373395 (1994-12-01), Adachi

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