Scanner repeatability error determining apparatus
a scanner repeatability error determining apparatus for use with a line scanning apparatus which includes a galvanometer responsive to a complex signal having ramp signal and compensation signal components for driving a line scan mirror. The compensation signal is a function of variations in velocity of the line scan mirror from a desired velocity. The apparatus includes circuitry for defining a predetermined range for the compensation signal and when such compensation signal is outside of this range produces an indication that there is a repeatability error.
Description
Patent History
Patent number: T970003
Type: Grant
Filed: Feb 22, 1977
Date of Patent: May 2, 1978
Inventors: John Edward Newton (Portsmouth, VA), Mark Alan Simon (Rochester, NY)
Application Number: 5/770,963
Type: Grant
Filed: Feb 22, 1977
Date of Patent: May 2, 1978
Inventors: John Edward Newton (Portsmouth, VA), Mark Alan Simon (Rochester, NY)
Application Number: 5/770,963
Classifications
Current U.S. Class:
Reflection Type(e.g., Mirror Galvanometer) (250/230)
International Classification: G01D 530;
International Classification: G01D 530;
