Patent ID: 11885680
Assignee: KONICA MINOLTA, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A spectral device comprising:
a filter that changes a spectral transmittance depending on a position, the filter transmitting light of multiple wavelength ranges from a measurement object at any position to make the spectral transmittance allow Hadamard transform spectrometry;
a driver means that slides the filter; and
a detector to detect an intensity of the light from the measurement object, the light having passed through the filter, the detector to further measure the intensity of the light multiple times sequentially while the driver means slides the filter, thereby obtaining multiple pieces of measured data, and calculate spectral information by Hadamard transform on the basis of the multiple pieces of the measured data,
wherein the filter has at any position, within a measurement target wavelength region of the detector, two or more discrete wavelength ranges with an 80-percent or more transmittance and three or more discrete wavelength ranges with a 20-percent or less transmittance at any position, the two or more discrete wavelength ranges with an 80-percent or more transmittance being the multiple wavelength ranges that are transmitted by the filter.