05986838 is referenced by 37 patents and cites 21 patents.

A cartridge for a data storage disk drive has a thin retroreflective marker. Light from a source is reflected from the marker almost exactly on its incident path. A planar light shaping optical structure such as a holographic light shaping diffuser (LSD) ruled or blazed diffraction grating, holographic diffraction grating, binary optics or holographic diffraction grating directs light to the detector. The LSD has degrees of angular diffusion in different orthogonal axes. This property makes possible unique identification of different types of cartridges.

Title
Thin retroreflective marker for data storage cartridge
Application Number
388242
Publication Number
5986838
Application Date
April 3, 1997
Publication Date
November 16, 1999
Inventor
Fred C Thomas III
Kaysville
UT, US
Agent
Woodcock Washburn Kurtz Mackiewicz & Norris
Assignee
Iomega Corporation
UT, US
IPC
G11B 19/04
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