Journal of Xidian University ›› 2016, Vol. 43 ›› Issue (4): 117-122.doi: 10.3969/j.issn.1001-2400.2016.04.021

• Article • Previous Articles     Next Articles

Design and hardware implementation of the  small-size CMOS camera system

XU Dongdong1,2;ZHANG Yu1;NIE Ting1,2;ZHANG Xingxiang1;REN Jianyue1   

  1. (1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Scienses, Changchun  130033, China;
    2. University of Chinese Academy of Sciences,  Beijing  100049, China)
  • Received:2015-06-10 Online:2016-08-20 Published:2016-10-12

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Abstract:

A camera with a small-size and low-power is designed, using a CMOS MT9V032 as the digital image sensor. Based on the primary aberration theory, the optical system with the small size and compact structure is designed whose focal length is 12.95mm and whose F number is 5, and the modulation transfer functions (MTF) of all fields are better than 0.5 at the spatial frequency of 83lp/mm; we use FPGA as the timing control platform for the electronic system and the digital video signal of the CMOS output which is delivered through the differential chip in the low voltage differential signal (LVDS) output format to the image acquisition card. Finally, we can see the image on the computer. Experimental results show that the designed CMOS camera has a good image quality, low power, portability, and high reliability, and that the frame rate is 60frames/s when the clock is 26.6MHz, and it could achieve a variety of modes by adjusting the values of the internal registers, which is particularly suitable for the high requirements occasion in the camera volume and high imaging quality.

Key words: optical design, complementary metal-oxide-semiconductor transistor, aberrations, driving circuit, signal-to-noise ratio


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