A new interpolating method to enhance the resolution of gratings using complementary metal-oxide semiconductor (CMOS) according to the variation of some specified spectral light intensities during the motion of scale grating in a periodic separation is proposed. CMOS image sensor (pixel array 648*488) was also introduced as receiving device and its stability was verified experimentally. Many factors in the experiment were analyzed theoretically and contrasted with experiment. The advantages of this novel method were featured by CMOS and the specified spectral variation of the energy distribution was discussed.
© 2005 Chinese Optics Letters
(050.1950) Diffraction and gratings : Diffraction gratings
(110.0110) Imaging systems : Imaging systems
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6170) Spectroscopy : Spectra
Tianjin Tang, Xiangqun Cao, Hongqiu Chen, and Bin Lin, "A new interpolating method based on the variation of spectra energy using CMOS array," Chin. Opt. Lett. 3, 80-82 (2005)