Wavelength-division multiplex digital optical position sensor
摘要
According to a first aspect of the invention, an optical position sensor employs a position encoder having collimators and reflectors with mutually aligned optical axes mounted in a support. A slotted code plate moves between the collimators and reflectors in a plane non-perpendicular to their optic axes. This encoder converts position to optical signals reliably, regardless of mechanical shock or vibration. According to a second aspect of the invention, an optical position sensing system employs wavelength-division multiplexing to distribute light pulses to different position encoders and time-division multiplexing to further distribute pluses to the collimators in each encoder. This permits multiple position encoders to be served by a single light source and optical fiber.
申请公布号
US5498867(A)
申请公布日期
1996.03.12
申请号
US19940345413
申请日期
1994.11.21
申请人
UEHARA, SACHIO;KAWASAKI JUKOGYO KABUSHIKI KAISHA;OKI ELECTRIC INDUSTRY CO., LTD.