Coma correction in optical head with astigmatism for focusing er

Details Coma correction in optical head with astigmatism for focusing er Coma correction in optical head with astigmatism for focusing er

1986-04-03

1987-11-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

369 44, G11B 2110, G01J 120

Patent

active

047091398

ABSTRACT:
In an optical head having a plate-like half mirror functioning both as a beam splitter and for producing an astigmatism usable in detecting a focusing error, an optical element is provided for correcting a coma introduced by the half-mirror. Such optical element for correcting coma desirably includes a plate-like element inclined oppositely to the plate-like half mirror in respect to an optical axis of the head.

REFERENCES:
patent: 2868066 (1959-01-01), Argyle
patent: 4410241 (1983-10-01), de Lang et al.
patent: 4412723 (1983-11-01), Shafer
patent: 4541688 (1985-09-01), Watt et al.

Affiliated with

Also associated with

Rating

Coma correction in optical head with astigmatism for focusing er does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coma correction in optical head with astigmatism for focusing er, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coma correction in optical head with astigmatism for focusing er will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2424440