Field curvature reduction for optical system

Details Field curvature reduction for optical system Field curvature reduction for optical system

2006-10-31

2006-10-31

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S103000, C369S112030

Reexamination Certificate

active

07130258

ABSTRACT:
An optical head (1) for scanning an optical record carrier (2) is provided with a compensator (16) for compensating the field curvature aberration of the objective system (18) caused by operation of the optical head at a different field angles. A surface of the compensator (16) comprises a phase structure in the form of annular areas (52, 53, 54, 55, 56), the areas forming a non-periodic pattern of optical paths of different lengths. The optical paths change as a function of field angle and form a field angle-dependent wavefront deviation that compensates field curvature of the optical head.

REFERENCES:
patent: 6947368 (2005-09-01), Hendriks et al.

Affiliated with

Also associated with

Rating

Field curvature reduction for optical system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Field curvature reduction for optical system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Field curvature reduction for optical system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3659966