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Scanner repeatability error determining apparatus |
| T970003 |
Scanner repeatability error determining apparatus
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| Patent Drawings: | |
| Inventor: |
Newton, et al. |
| Date Issued: |
May 2, 1978 |
| Application: |
05/770,963 |
| Filed: |
February 22, 1977 |
| Inventors: |
Newton; John Edward (Portsmouth, VA)
Simon; Mark Alan (Rochester, NY)
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| U.S. Class: |
250/230 |
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| Abstract: |
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. |
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