MANUFACTURE OF OPTICAL ROTARY ENCODER

MANUFACTURE OF OPTICAL ROTARY ENCODER

PROBLEM TO BE SOLVED: To improve concentricity accuracy of a light-transmitting part of a rotary disk and a light-transmitting part of a fixed slit of an optical rotary encoder. SOLUTION: A rotary disk 4 is fitted to a rotary shaft 3 supported at a housing 1 via a bearing 2, and a fixed slit plate 7...

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Bibliographische Detailangaben
1. Verfasser: WADA TATSURO
Format: Patent
Sprache:eng
Schlagworte:
ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS
MEASURING
MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
PHYSICS
TARIFF METERING APPARATUS
TESTING
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To improve concentricity accuracy of a light-transmitting part of a rotary disk and a light-transmitting part of a fixed slit of an optical rotary encoder. SOLUTION: A rotary disk 4 is fitted to a rotary shaft 3 supported at a housing 1 via a bearing 2, and a fixed slit plate 7 is incorporated in the housing 1. In this state, a photosensitive agent layer 20 set at a surface of the fixed slit part 7 is exposed to light beams projected through a light-transmitting part 5 of the rotary disk 4. After the layer 20 is developed, other parts such as a light-detecting element 8, a light-emitting element 9, a circuit board, etc., are assembled. If the light-transmitting part 5 of the rotary disk 4 is a hole, the hole can be used in place of the photosensitive agent layer 20 to print to the fixed slit plate.