Retroreflective marker for data storage cartridge
First Claim
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1. A cartridge for a data storage drive which has a source of irradiance and a detector of said irradiance for determining whether the cartridge is suitable for use in said drive, said cartridge comprising:
- a body;
a data storage medium in said body; and
a marker on said body, said marker being a retroreflective material which reflects irradiance from said source back toward said source for detection by said detector which thereby identifies said cartridge as being suitable for use in that drive.
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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.
89 Citations
16 Claims
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1. A cartridge for a data storage drive which has a source of irradiance and a detector of said irradiance for determining whether the cartridge is suitable for use in said drive, said cartridge comprising:
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a body; a data storage medium in said body; and a marker on said body, said marker being a retroreflective material which reflects irradiance from said source back toward said source for detection by said detector which thereby identifies said cartridge as being suitable for use in that drive. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. The combination of a data storage drive and a cartridge for said drive, said drive comprising:
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a source of irradiance; a detector of reflected irradiance; and means for enabling said drive when reflected irradiance exceeds a predetermined level, said cartridge comprising; a body; a data storage medium in said body; and a retroreflective marker on said cartridge, said detector being connected to enable said means for enabling said disk drive when light from said retroreflective marker exceeds a predetermined level. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification