Optical transducer system for monitoring movable parts, optical modulator and musical instrument using the same
An optical modulator (30) is hung from a key (2a, 2b) moved on a key trajectory so as to be moved together with the key (2a, 2b), and a light beam (B, B1, B2), which is stationary with respect to a key bed (6a), is radiated through the optical modulator (30); a large number of miniature refractors (...
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| creator | KATO, TADAHARU |
| description | An optical modulator (30) is hung from a key (2a, 2b) moved on a key trajectory so as to be moved together with the key (2a, 2b), and a light beam (B, B1, B2), which is stationary with respect to a key bed (6a), is radiated through the optical modulator (30); a large number of miniature refractors (32c) are formed on the light output surface (32b) of the optical modulator (30), and the density of miniature refractors (32c) per unit area is varied in a direction in which the optical modulator (30) is moved together with the key (2a, 2b) so that the current key position is converted to the amount of light passing through the optical modulator (30); since the miniature refractors (32c) and other portions of optical modulator (30) have a unitary structure, a molding process is used for the optical modulator (30), and the molding process make the production cost low. |
| format | Patent |
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a large number of miniature refractors (32c) are formed on the light output surface (32b) of the optical modulator (30), and the density of miniature refractors (32c) per unit area is varied in a direction in which the optical modulator (30) is moved together with the key (2a, 2b) so that the current key position is converted to the amount of light passing through the optical modulator (30); since the miniature refractors (32c) and other portions of optical modulator (30) have a unitary structure, a molding process is used for the optical modulator (30), and the molding process make the production cost low.</description><language>eng ; fre ; ger</language><subject>ACOUSTICS ; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ; ELECTROPHONIC MUSICAL INSTRUMENTS ; MEASURING ; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE ; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ; MUSICAL INSTRUMENTS ; PHYSICS ; TARIFF METERING APPARATUS ; TESTING</subject><creationdate>2015</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150729&DB=EPODOC&CC=EP&NR=1879003A3$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150729&DB=EPODOC&CC=EP&NR=1879003A3$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KATO, TADAHARU</creatorcontrib><title>Optical transducer system for monitoring movable parts, optical modulator and musical instrument using the same</title><description>An optical modulator (30) is hung from a key (2a, 2b) moved on a key trajectory so as to be moved together with the key (2a, 2b), and a light beam (B, B1, B2), which is stationary with respect to a key bed (6a), is radiated through the optical modulator (30); 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a large number of miniature refractors (32c) are formed on the light output surface (32b) of the optical modulator (30), and the density of miniature refractors (32c) per unit area is varied in a direction in which the optical modulator (30) is moved together with the key (2a, 2b) so that the current key position is converted to the amount of light passing through the optical modulator (30); since the miniature refractors (32c) and other portions of optical modulator (30) have a unitary structure, a molding process is used for the optical modulator (30), and the molding process make the production cost low.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | ACOUSTICS ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ELECTROPHONIC MUSICAL INSTRUMENTS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MUSICAL INSTRUMENTS PHYSICS TARIFF METERING APPARATUS TESTING |
| title | Optical transducer system for monitoring movable parts, optical modulator and musical instrument using the same |
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