Mapping disc defect detector

Details Mapping disc defect detector Mapping disc defect detector

1982-03-01

1984-10-16

Richardson, Robert L.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, 369 58, 358342, H04N 576, G01N 2132, G11B 2736

Patent

active

044778902

ABSTRACT:
Apparatus for generating a map of detectable characteristics of a disc. A scanning signal display device has a detector coupled to the intensity input thereof. The detector detects the characteristics at a location on the disc which is scanned in a spiral pattern and provides a signal representative of the detected characteristics to the display device. A signal is generated and provided to the drive inputs of the display device to cause the trace of the device to follow a spiral pattern corresponding to the scan pattern of the predetermined location.

REFERENCES:
patent: 4030835 (1977-06-01), Firester et al.
patent: 4069484 (1978-01-01), Firester et al.
patent: 4307419 (1981-12-01), Matey et al.
patent: 4325134 (1982-04-01), Langley et al.

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