Retroreflective marker for data storage cartridge

Details Retroreflective marker for data storage cartridge Retroreflective marker for data storage cartridge

1995-02-14

1997-06-10

Young, W. R.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

360 71, 360133, 242344, G11B 1904

Patent

active

056382286

ABSTRACT:
A cartridge for a data storage disk drive has a retroreflective marker. Light from a source is reflected from the marker almost exactly on its incident path. This property makes possible unique identification of the cartridge with minimal senstivity to light reflected from other surfaces. The marker enables a disk drive enable circuit so that the drive cannot be used with improper cartridges which might damage it. Also, a retroreflective marker is used for write protection of the cartridge.

REFERENCES:
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patent: 5038359 (1991-08-01), Pepper
patent: 5325243 (1994-06-01), Roth
patent: 5491586 (1996-02-01), Phillips
Pat. Abstracts of Japan vol. 18, No. 85, published Feb. 10, 1994 Appl. No. 4-113,999, Sugawara.
"Experiments with retrodirective arrays", Optical Engineering, vol. 21, No. 2, Mar./Apr. 1982.
"Retroreflection--What is it and how is it used?", ASTM Standardization News, Feb. 1982, J. Rennilson.
"Factor affecting the metrology of retroreflective materials", Applied Optics, vol. 19, No. 8, Apr. 1980.
Scientific American, "The Amateur Scientist: Wonders with the retroreflector, a mirro that removes distortion from a light beam"; Jearl Walker; Jan. 1988-vol. 258, No. 1. pp. 96-99.

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