Optical disc spindle straightness testing apparatus and method

Details Optical disc spindle straightness testing apparatus and method Optical disc spindle straightness testing apparatus and method

1998-10-20

2000-07-11

Bennett, G. Bradley

Geometrical instruments

Gauge

Straightness, flatness, or alignment

33550, G01B 728

Patent

active

060854294

ABSTRACT:
A test apparatus and method utilize a proximity sensor to detect the deflection of an optical disc spindle as the spindle is supported on a rotatable spindle support. The proximity sensor is disposed at a fixed location relative to the rotational axis of the rotatable spindle support, and is configured to output a variable proximity signal associated with the distance between the proximity sensor and the optical disc spindle. The output of the proximity sensor is fed to an electrical circuit to determine whether the deflection is outside of an acceptable range during rotation of the rotatable spindle support. If so, an indication is provided to an operator to permit the operator to repair or discard the spindle, as appropriate. In addition, a length detector is used to provide an indication of the length of the optical disc spindle so that the electrical circuit can adjust the acceptable deflection range for different lengths of optical disc spindles.

REFERENCES:
patent: 3795055 (1974-03-01), Zucco
patent: 4696190 (1987-09-01), Bucher et al.
patent: 4750141 (1988-06-01), Judell et al.
patent: 4914827 (1990-04-01), Cook
patent: 5116234 (1992-05-01), Bertz et al.
patent: 5301436 (1994-04-01), Johnston
patent: 5485406 (1996-01-01), Wada et al.
Declaration of Joseph D. Cresgy, (Feb. 16, 1999).

Affiliated with

Also associated with

Rating

Optical disc spindle straightness testing apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disc spindle straightness testing apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc spindle straightness testing apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-529872