[Research of image spectrometer using linear variable interference filter].
In the present work we have designed a small-size portable imaging spectrometer using linear variable interference filter, with CCD camera as picture sensor, and micromotion stage to bring along interference filter which scan across every pixel of CCD array. The difference column pixel in the picture which we get at every step is monocolour partial image under different wavelength, with the step by step, these column monocolour pixels change the wavelength. And finally we reassembled these images and get the whole monocolour image with different wavelength. The interval of sweep step length decided by the required spectrum resolution and the required wavelength interval of different pictures. The experiment demonstrated the resolution of this spectrometer is about 16 nm, but that major reason of the limiting resolution is the band width of the linear variable interference filter. The spatial resolution of the instrument ultimately decided by CCD, filter and imaging lens. This spectrometer has some characters such as compact structure, higher spatial resolution, higher spectrum resolution, higher scan rate and so on. Furthermore, an application of this instrument in distinguishing from camouflage have been showed.
Xu
Xiao-xuan
XX
Photonics Center, Nankai University, Tianjin 300071, China.
Lin
Hai-bo
HB
Yu
Gang
G
Zhu
Jian
J
Zhang
Cun-zhou
CZ
Zhang
Guang-yin
GY
D000703:Analog-Digital Conversion; D005374:Filtration; D007091:Image Processing, Computer-Assisted; D018715:Microscopy, Video; D010781:Photography / Q000379:methods*; D013053:Spectrophotometry / Q000295:instrumentation* / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods