Design of tooth color measurement system based on silicon double P-N junction color sensor

doi:10.1007/s11460-009-0045-7

Front Elect Electr Eng Chin

2009, Vol. 4

Issue (3) : 318-322 https://doi.org/10.1007/s11460-009-0045-7

RESEARCH ARTICLE

Design of tooth color measurement system based on silicon double P-N junction color sensor

Zengliang SHI¹, Dali LIU¹(

), Yu WANG¹, Xi CHEN¹, Shiying BAI², Jingwei XU²

1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China; 2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, National Analytical Research Center of Electrochemistry and Spectroscopy, Changchun 130022, China

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Abstract

Working principles of silicon double P-N junction color sensor are introduced and a color measurement system to distinguish tooth color difference is designed in this paper. This system consists of silicon double P-N junction, a small optical fiber probe, signal process circuit and an MSP430FG439 single-chip system. Small in size, this system can measure different parts of the tooth in a fast and convenient way with high-accuracy. Thus, this system will be very promising in building prosthodontics and tooth fabrication.

Keywords silicon double P-N junction color sensor color identification MSP430FG439 single-chip

Corresponding Author(s): LIU Dali,Email:ldl@mail.jlu.edu.cn

Issue Date: 05 September 2009

Cite this article:

Zengliang SHI,Dali LIU,Yu WANG, et al. Design of tooth color measurement system based on silicon double P-N junction color sensor[J]. Front Elect Electr Eng Chin, 2009, 4(3): 318-322.

URL:

https://academic.hep.com.cn/fee/EN/10.1007/s11460-009-0045-7
https://academic.hep.com.cn/fee/EN/Y2009/V4/I3/318

Fig.1 Cross section and equivalent circuit of silicon color sensor with double P-N junction. (a) Structure; (b) equivalent circuit

Fig.2 Spectral sensitivity of silicon color sensor with double P-N junction

Fig.3 Current ratio / with different wavelength of incident light

Fig.4 Optical fiber probe

Fig.5 Working principle frame of the system

Fig.6 Procedure of main system program

Fig.7 Results obtained from instrument (S) detection and unaided eyes (P, P, P, P, P) observation

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