| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spectrum measuring apparatus capable of preventing degradation of S/N ratio by delivering a sufficient light volume to imaging means such as an imaging camera, an imaging element, etc. <P>SOLUTION: A spectrum measuring apparatus 1 comprises: a liquid crystal device 2 as a Fourier transform element; a voltage controller 5 for controlling voltage applied to the liquid crystal device 2; and an imaging device 3 for imaging a transmittance waveform of a measuring object 7 passing through the liquid crystal device 2. A computer 4 executes: a step for storing data about images taken while controlling the voltage applied to the liquid crystal device 2 so that a wave number included in the transmittance waveform after passage through the liquid crystal device 2 has a non-integral multiple relationship; a step for calculating a Fourier component of integral multiple frequency for each pixel in a measurement interval by solving a simultaneous equation based on the multiple pieces of image data which differ in the wave number; and a step for calculating an optical spectrum for each pixel by applying inverse Fourier transform to the calculated Fourier component of integral multiple frequency in each pixel. <P>COPYRIGHT: (C)2012,JPO&INPIT |
