Apparatus and method for accurately scanning a light beam across

Details Apparatus and method for accurately scanning a light beam across Apparatus and method for accurately scanning a light beam across

1996-08-16

2000-02-29

Young, W. R.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 4429, 369 54, G11B 7085

Patent

active

RE0365904

ABSTRACT:
A lens is accelerated on a coarse tracking carriage while enabling a lens position servo, which moves the carriage so that the lens returns to a neutral position on the carriage. After the beam spot becomes fast enough, the carriage is accelerated and decelerated until the beam spot arrives near a destination track; then, the lens is decelerated on the carriage to stop on the destination track. The method does not require a stop at each track which is to be crossed. In a second method, the carriage is first accelerated while the fine tracking servo is enabled to trace a start track. After the carriage becomes fast enough that eccentricity of the tracks will not prohibit a correct jump, the fine tracking servo is disabled. The beam spot is then moved by a lens lock force which returns the lens to the neutral position on the carriage. The carriage is further accelerated and decelerated, and then the lens is decelerated in the same manner as the first method.

REFERENCES:
patent: 4106058 (1978-08-01), Romeas et al.
patent: 4375091 (1983-02-01), Dakin et al.
patent: 4397009 (1983-08-01), Eriksson
patent: 4484319 (1984-11-01), Koishi et al.
patent: 4495608 (1985-01-01), Kimura et al.
patent: 4562562 (1985-12-01), Moriya et al.
patent: 4567534 (1986-01-01), Groen et al.
patent: 4615023 (1986-09-01), Inada et al.
patent: 4697256 (1987-09-01), Shinkai
patent: 4740939 (1988-04-01), Kimura et al.
patent: 4774699 (1988-09-01), Giddings
patent: 4779251 (1988-10-01), Burroughs
patent: 4845698 (1989-07-01), Baas
patent: 4847821 (1989-07-01), Baas

Affiliated with

Also associated with

Rating

Apparatus and method for accurately scanning a light beam across does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for accurately scanning a light beam across, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for accurately scanning a light beam across will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-671406