Measurement accuracy of lateral-effect position-sensitive devices in presence of stray illumination noise

Iqbal, S.; Gualini, M. M. S.; Asundi, Anand

doi:10.1016/j.sna.2007.11.015

Cited by 12 publications

(8 citation statements)

References 6 publications

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“…X l ， X 2 ， Y l ， Y 2 are the output current of the 4 signal electrodes. The formula (1) and (2) show that the position coordinates to be measured can be calculated with the output current signals of the PSD.…”

Section: The Principle and Error Analysismentioning

confidence: 99%

“…In the LD-PSD system described above, its accuracy is always affect by LD drift, background light, non-linear error and dark current of PSD, electromagnetic noise, temperature and other environmental factors. If the centroid of background light is (X N ,Y N ), it can be regarded as a light spot on (X N , Y N ) [2]. The currents flowing through the four electrodes are X N1 , X N2 and Y N1 , Y N2 when background light independent action.…”

Section: B System Structure and Error Analysismentioning

confidence: 99%

See 1 more Smart Citation

Research on Signal Processing for LD-PSD System Based on Square-Wave Modulation

Huang

Jia

Lin

et al. 2009

2009 2nd International Congress on Image and Signal Processing

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The LD-PSD measurement system is widely used in modern geometrical precision measurement, such as displacement, angle, vibration and position error detection. It adopts LD as the light source and PSD to detect the position of laser spot. In this system, such unfavorable factors as background light, dark current of PSD, environmental temperature and electromagnetic noise can reduce the accuracy of the practical measurement system and result in the phenomenon of drift. This paper presents a method of signal processing for LD-PSD system based on square-wave modulation to improve the system accuracy. The factors affecting measurement precision are analyzed and some general methods are introduced. Aiming at a typical 2-D linear displacement measuring system, the signal processing system is designed, including the LD driver and PSD signal processing and sampling module. The experimental results show that the system can effectively decreases the noise effect and has good linearity and stability.

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Section: The Principle and Error Analysismentioning

confidence: 99%

Section: B System Structure and Error Analysismentioning

confidence: 99%

Research on Signal Processing for LD-PSD System Based on Square-Wave Modulation

Huang

Jia

Lin

et al. 2009

2009 2nd International Congress on Image and Signal Processing

View full text Add to dashboard Cite

show abstract

“…Hwang et al [6] proposed a three-probe system for measuring the parallelism and straightness of a pair of rails for ultra-precision guideways. Iqbal et al [7] first described how randomly arising illumination noises produce unpredicted variations in the position sensing detector (PSD) output. You et al [8] proposed a straightness error measurement approach based on common-path compensation in order to eliminate the laser beam drift by utilizing an optical module with a PSD and a quadrant detector (QD).…”

Section: Introductionmentioning

confidence: 99%

An Online Simultaneous Measurement of the Dual-Axis Straightness Error for Machine Tools

et al. 2018

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Vertical straightness errors are the key factor that affects the flatness of the workpiece during vertical machining. Traditionally, the individually measured and fitted vertical straightness errors of the X and Y axes are used to compensate the Z axis and, thus, obtain the flatness of the working table of the machine tool. However, it is difficult to measure and compensate the vertical straightness error of the desired position on the working table, not to mention the centroid variation effect of the working table on the measured data. In this study, an online dual-axis measurement system with repeatability (3σ) of 2.46 μm is developed to simultaneously measure X-axis and Y-axis straightness errors of the desired position of a working table. Furthermore, the measured data are utilized to establish a flatness error model to reduce the vertical straightness error of the working table such that the repeatability (3σ) of the measured flatness may be kept within a range of 0.65 μm.

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“…Therefore, the cancellation of stray light is being recognized as a key technology for achieving a better resolution of the optical system loaded on a satellite for earth observation. During earth watching by an electrooptical payload on a LEO(Low Earth Orbit) satellite, the imaging quality can be accidentally disturbed by illumination sources created by abnormal angles [4][5]. This stray light can render the signal obscure, reduce visibility, and cause incorrect radiometric results.…”

Section: Introductionmentioning

confidence: 99%

Stray Light Analysis of High Resolution Camera for a Low-Earth-Orbit Satellite

Park¹,

Jang²,

Kim³

et al. 2011

Journal of the Optical Society of Korea

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We discuss the effect of stray light on a high-precision camera in an LEO(Low Earth Orbit) satellite. The critical objects and illumination objects were sorted to discover the stray light sources in the optical system. Scatter modeling was applied to determine a noise effect on the surface of a detector, and the relative flux of a signal and noise were also calculated. The stable range of reflectivity of the beam splitter was estimated for various scattering models.

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Measurement accuracy of lateral-effect position-sensitive devices in presence of stray illumination noise

Cited by 12 publications

References 6 publications

Research on Signal Processing for LD-PSD System Based on Square-Wave Modulation

Research on Signal Processing for LD-PSD System Based on Square-Wave Modulation

An Online Simultaneous Measurement of the Dual-Axis Straightness Error for Machine Tools

Stray Light Analysis of High Resolution Camera for a Low-Earth-Orbit Satellite

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