Small Angle Measurement in a Turbulent Environment Using Position-Sensitive Detectors

Mäkynen, Anssi; Kostamovaara, J.; Myllylä, Risto

doi:10.1007/978-94-011-2560-4_32

Cited by 7 publications

(1 citation statement)

References 3 publications

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“…The principle of position detection of laser-beam movements by the quad detector is well known. 9,10 The photosensitive sensor area is divided into four quadrants, each of which generates a voltage output depending on the intensity of illumination incident upon it. If the laser spot moves from the left side to the right side of the quad detectors, the output from the leftside detectors decreases while the output from the rightside detectors increases.…”

Section: Design Of the Multidimensional Monitoring Systemmentioning

confidence: 99%

High-resolution multidimensional displacement monitoring system

Lee

Joneja

1997

Opt. Eng

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The possibility of using quadrant detectors to develop a new optical system that can monitor all six degrees of freedom of mechanical workpieces with very high resolution is investigated. A prototype system based on this approach has been designed and built. Although the system is not fully optimized, our proposed system has already demonstrated some promising results. Using a thermally compensated laser source together with a pinhole spatial filtering system, we have demonstrated that lateral resolution better than 50 nm and angular displacement resolution better than 0.25 rad is achievable with this system. © 1997 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(97)

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Section: Design Of the Multidimensional Monitoring Systemmentioning

confidence: 99%