Quantification and elimination of the CCD dark current in weak spectrum measurement by modulation and correlation method

Zhijian Cai; Xiaoru Wei; Jianzhi Ju; Jianhong Wu

doi:10.1117/12.869369

9 November 2010 Quantification and elimination of the CCD dark current in weak spectrum measurement by modulation and correlation method

Zhijian Cai, Xiaoru Wei, Jianzhi Ju, Jianhong Wu

Author Affiliations +

Proceedings Volume 7850, Optoelectronic Imaging and Multimedia Technology; 785005 (2010) https://doi.org/10.1117/12.869369
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

In weak spectrum measurement, the dark current of CCD could be very large and thus affect the proper application. It's essential to suppress the dark current and other noises to get high quality spectral data. In this paper we proposed a modulation and correlation method to eliminate it for weak spectrum measurement. In this design, only a compact camera shutter is to be mounted on the spectrometer, which will facilitate the independent control of CCD integral-time and light passing or blocking status. To measure the weak spectrum, the shutter is modulated by a pseudorandom binary sequence under fixed CCD integral-time, and the correlation processing is performed on the captured spectra to produce high quality spectrum, where dark current will be totally eliminated and random noises be suppressed. The system setup and the brief analysis of this method are introduced. Computer simulation and preliminary weak spectrum measurement results are also provided in this paper.

Citation Download Citation

Zhijian Cai, Xiaoru Wei, Jianzhi Ju, and Jianhong Wu "Quantification and elimination of the CCD dark current in weak spectrum measurement by modulation and correlation method", Proc. SPIE 7850, Optoelectronic Imaging and Multimedia Technology, 785005 (9 November 2010); https://doi.org/10.1117/12.869369

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available