Multibeam recording device

Details Multibeam recording device Multibeam recording device

1996-05-16

1998-04-28

Nelms, David C.

Optical: systems and elements

Collimating of light beam

359618, G02B 2710

Patent

active

057452962

ABSTRACT:
Lens arrangements for a multibeam recording device include a first lens group that forms collimated beams paired with a second lens group, allowing the second lens group to be moved for focusing. A first lens group forms non-collimated beams is paired with a second lens group, allowing one lens group to be moved for magnification change. A first lens group forms non-collimated beams between internal portions and collimated beams leading to a second lens group, allowing magnification change by moving the two portions and focus change by moving the second lens group. A first lens group having two movable portions is paired with a second lens group, both movable portions being shiftable and tiltable to correct for decentering errors. Three concrete reduction lens system examples applicable in each of the embodiments use positive anomalous dispersion glass, allowing low dispersion and the use of blue LEDs to increase the imaging resolution.

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patent: 5619488 (1997-04-01), Ota et al.
"Third Order Abberation in the Optical System, Including Decentering Error" by Yoshiya Matsui, Shadan-Hojin Nihon Opto-Mechatronics Association (Japan Optoelectro-Mechanics Association), Jun. 1990 and an English language translation.

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