Research of spectrophotometer for bio-chemical analyzer based on automatic adjustment of the integration time of linear CCD
The bio-chemical analyzer (BCA) is a kind of instrument which is used to measure some clinical or chemical targets in samples (blood). Since light sources energy is different and samples have different spectrum absorbance in different wavelength. Energy attenuation of ultraviolet (UV) wavelength is large; otherwise, The noise which exist in the electronic circuits and the astigmatism which exist in the ray-route system,both of which will reduce the luminosity nicety in the UV wave-band. In this paper, Virtual Instrument(VI) technique and the method of software optimizing algorithm are used to enhance measurement veracity of the luminosity value, and the exposure time of linear CCD is auto-adjusted to expose separately for strong light and week light. From experiment results, we can obtain that the capability and signal to noise ratio (SNR) of the system are greatly improved, the spectrum range of spectrophotometer for BCA can reach 300～800nm and the distinguish of wavelength is less than 10nm.
spectrophotometer for bio-chemical analyzer linear CCD VI technique spectrum absorbance SNR
Zhong Ren Guodong Liu Zhen Huang Lvming Zeng Bilin Shao
Key Lab of Optic-electronic &Communication, Jiangxi science &technology normal college Nan Chang, Jiang Xi 330038;China
国际会议
上海
英文
2164-2168
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）