Invention Grant
- Patent Title: Wideband optical position sensor with normalization
- Patent Title (中): 宽带光学位置传感器具有标准化
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Application No.: US13261267Application Date: 2009-12-08
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Publication No.: US08767219B2Publication Date: 2014-07-01
- Inventor: Paul Edmond Rutten
- Applicant: Paul Edmond Rutten
- International Application: PCT/NL2009/050744 WO 20091208
- International Announcement: WO2011/071366 WO 20110616
- Main IPC: G01B11/14
- IPC: G01B11/14

Abstract:
A novel electro-optical sensor for the wideband and normalized translation of the two-dimensional position of a light beam transverse to its traveling direction into electrical position signals. Incident on the sensor is the light beam 122 which is divided with a beamsplitter 121 into a transmitted beam 123 and a reflected beam 124 which both have similar transverse motion behavior as the incident beam. From each of these divided beams the position is determined one-dimensionally with an one-dimensional optical position sensor, 125, 126. The one-dimensional position determination is done by dissecting each divided beam into two beams using a partitioning element. The outputted dissected beams have a power distribution that depends on the position of the divided beam relative to the partitioning element. Each beam is optically coupled to a photo detector which translates its power into an electric current. In each circuit 127, 128, the two photo detectors are reverse biased and electrically connected in series. The node connecting them is a current type position output. The sum current through the two photo detectors is determined using two current mirrors. The first mirrors the current through one photo detector, the second mirrors the output current of the first current mirror plus the current through the second photo detector and outputs a current type sum signal. Each position signal is normalized with respect to its sum signal using an analog-to-digital converter, 129, 130, with the sum signal coupled to the reference input and the position signal coupled to the regular signal input.
Public/Granted literature
- US20120206735A1 WIDEBAND OPTICAL POSITION SENSOR WITH NORMALIZATION Public/Granted day:2012-08-16
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