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Proceedings Paper

Replacing f-theta lens with normal lens by curve fitting
Author(s): Li Ding; Bin Shan
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Paper Abstract

The laser scanning technology is often used in measuring the dimension of measurand. In this technology, f-(theta) lens is used as a correcting lens. In this paper, we use a normal lens replacing f-(theta) lens. Laser scans produced are directed through the normal lens to product a parallel beam across the gate area. We put a norm product in the gate area and get the relation of dimension of product and position in the gate area. With the relation of the position and dimension, we can make a curve-fitting and save the curve- fitting in an EEPROM. When we measure the dimension of product, with the different position the product in the gate area, we can have calculated the exact value of products by curve-fitting. In this paper, we show how to design the curve-fitting and how to use the curve-fitting to measure the dimension of measurand with a normal lens.

Paper Details

Date Published: 5 August 1998
PDF: 3 pages
Proc. SPIE 3557, Current Developments in Optical Elements and Manufacturing, (5 August 1998); doi: 10.1117/12.318331
Show Author Affiliations
Li Ding, Zhengzhou Institute of Technology (China)
Bin Shan, Zhengzhou Institute of Technology (China)

Published in SPIE Proceedings Vol. 3557:
Current Developments in Optical Elements and Manufacturing
Qiming Xin; Robert E. Parks, Editor(s)

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