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Proceedings Paper

Wavelength accuracy in spectrophotometer based on linear arrays
Author(s): Weijie Hu; Zhengfang Zhu
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Paper Abstract

In general, the high precise color meter uses spectrophotometer to measure sample's reflection or transmission rate and then calculate all kinds of color parameters. About spectrophotometer, to design the monochrome parts is very important. At present, the spectrophotometer designed for color meter never use grating scanning but linear array sensors. Its advantage is greatly reducing the measuring time and making the miniature and portable instruments possible. This article will select the linear photodiode array as an example to discuss how the relationship among the wavelength ?, the grating parameter d, the incidence angle ?, the focus length f', and the number of sensitive cells n in the array. We will deduce the formula of them and calculate the theory results. At last we analyze the difference between the real results and the theory results, discuss some reasons and recommend some methods to improve the wavelength accuracy. These formula and methods will be very useful for spectrophotometer design based on linear array sensors.

Paper Details

Date Published: 13 September 2002
PDF: 8 pages
Proc. SPIE 4922, Color Science and Imaging Technologies, (13 September 2002); doi: 10.1117/12.483139
Show Author Affiliations
Weijie Hu, Beijing Institute of Technology (China)
Zhengfang Zhu, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 4922:
Color Science and Imaging Technologies
Dazun Zhao; Ming Ronnier Luo; Kiyoharu Aizawa, Editor(s)

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