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PURPOSE:To eliminate read errors of hole information by selecting the width of transmission holes for discriminating calibration cells in the rotating direction of a calibration cell mounting disc larger than the width of light transmission holes for detecting positions of calibration cells in the r...

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Bibliographic Details
Main Authors MORI TADATAMI, KASHIWARA HIROBUMI
Format Patent
LanguageEnglish
Published 28.05.1982
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PHYSICS
TESTING
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Summary:PURPOSE:To eliminate read errors of hole information by selecting the width of transmission holes for discriminating calibration cells in the rotating direction of a calibration cell mounting disc larger than the width of light transmission holes for detecting positions of calibration cells in the rotation direction. CONSTITUTION:Transmission holes 411-413, 421-424 for discriminating calibration cells are made wider in the transverse width in the rotating direction of a disc 52 than light transmission holes 401-403 for detecting the positions of calibration cells. The light passing through the holes 411-412, 421-423 is wider than the light from light emitting elements passing through the holes 401-403.
Bibliography:Application Number: JP19800162166