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Optical Sensor for High-Resolution Position Control Disclosure Number: IPCOM000058164D
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-15

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Dietrich, R Droege, H Staudenmaier, K [+details]


The symmetrical reflex sensor system has a narrow gap 1 through which the light reflected from the object and emanating from light diodes 2, 3 is incident on phototransistor 4. The narrow gap leads to a high positioning accuracy in the X-direction, which may reach into the microscopic range, say, of paper roughness. The absence of optical lens systems affords a high tolerance in the Y-direction.