Auto-focusing technology for photoelectric measurement system

Recognition method of the dual-objective in a linear array CCD-based improved photoelectric measurement system using two lasers with different wavelengths

Optik ◽

10.1016/j.ijleo.2020.164857 ◽

2020 ◽

Vol 217 ◽

pp. 164857

Author(s):

Tao Dong ◽

Fengjia Gao ◽

Ding Chen ◽

Jiuqi Yang

Keyword(s):

Measurement System ◽

Linear Array ◽

Recognition Method ◽

Photoelectric Measurement ◽

Linear Array Ccd

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Performance Analysis of a Robust Proportional—Integral—Derivative Control Technique for the Auto-Focusing Mechanism of an Optical Surface Profile Measurement System

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1243/09596518jsce966 ◽

2010 ◽

Vol 224 (6) ◽

pp. 635-646

Author(s):

N Islam ◽

R M Parkin ◽

M R Jackson ◽

S Elmas ◽

Z Kesy ◽

...

Keyword(s):

Performance Analysis ◽

Measurement System ◽

Surface Profile ◽

Control Technique ◽

Profile Measurement ◽

Proportional Integral Derivative ◽

Optical Surface ◽

Proportional Integral Derivative Control ◽

Surface Profile Measurement ◽

Auto Focusing

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Three-dimensional CCD photoelectric measurement system and its applications

10.1117/12.294529 ◽

1997 ◽

Author(s):

Gangqiang Huang ◽

Jianqun Huang ◽

Qingshan Han ◽

Zhiyun Wang ◽

Zhensheng Wei

Keyword(s):

Measurement System ◽

Three Dimensional ◽

Photoelectric Measurement

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A Height Measurement Based on Laser Triangulation Probe and a Two Dimensional Image Measurement System for Smart Manufacturing

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.764-765.1324 ◽

2015 ◽

Vol 764-765 ◽

pp. 1324-1328

Author(s):

Pen Han Chen ◽

Chien Hung Liu ◽

Yu Fen Chen ◽

Hung Sheng Chiu ◽

Yu Chi Liu

Keyword(s):

Measurement System ◽

Smart Manufacturing ◽

Measuring Error ◽

Laser Triangulation ◽

Two Dimensional ◽

Image Measurement ◽

Height Measurement ◽

Dimensional Image ◽

Two Dimensional Image ◽

Auto Focusing

This paper integrated a laser triangulation probe with a two-dimensional image measurement system to measure the height of an object using the auto-focusing method. In the laser triangulation probe, the laser diode was used as the light source and one-dimensional position sensitive detector was adopted to receive the position of the laser spots to detect the height. The laser triangulation probe was used for small height measurement and the auto-focusing method was used for large height measurement. Two standard gauges with thicknesses of 8mm and 8.5mm were used to verify our proposed method. With height difference of 500μm, the experiment results showed the measuring error was within ±3μm and standard deviation was about 0.1μm.

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