Inclination of an objective lens in an optical information syste

Details Inclination of an objective lens in an optical information syste Inclination of an objective lens in an optical information syste

1994-08-02

1996-09-03

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4415, 369219, 359813, G11B 700, G02B 700

Patent

active

055530524

ABSTRACT:
A detecting apparatus which detects an inclination of an objective lens relative to a reference surface is provided. The objective lens is part of an optical data recording and reproducing apparatus in which data is optically recorded on and reproduced from a recording medium which is placed parallel to the reference surface. The apparatus includes a transparent parallel plate which is opposite the objective lens, parallel to the reference surface, and made of a material that is substantially optically equivalent to a transparent material of the recording medium. The apparatus further includes a reflecting mechanism for reflecting coherent light which has passed through the objective lens and the transparent parallel plate back towards the transparent parallel plate and the objective lens, and a beam splitting mechanism for splitting the coherent light into a first beam and a second beam. The apparatus further includes a wavefront rotating mechanism for rotating the first beam and the second beam about an optical axis in a manner such that the first beam and the second beam are rotated through 180 degrees with respect to one another, and a mechanism for superposing the first beam and the second beam to produce an optical interference.

REFERENCES:
patent: 3791739 (1974-02-01), Kawasaki
patent: 4948243 (1990-08-01), Saito
patent: 5056891 (1991-10-01), Masunaga
patent: 5068844 (1991-11-01), Tanaka
patent: 5157459 (1992-10-01), Oono et al.
patent: 5191483 (1993-03-01), Takizawa et al.
patent: 5222056 (1993-06-01), Tanaka
patent: 5257145 (1993-10-01), Kanazawa et al.
patent: 5367511 (1994-11-01), Aldenhouen et al.
patent: 5414563 (1995-05-01), Tanaka
patent: 5414680 (1995-05-01), Ikegame
patent: 5418772 (1995-05-01), Tanaka

Affiliated with

Also associated with

Rating

Inclination of an objective lens in an optical information syste does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Inclination of an objective lens in an optical information syste, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inclination of an objective lens in an optical information syste will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1956804