Patent ID: 11933735
Assignee: OSAKA UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A defect detection method for detecting a defective sample, the defect detection method comprising:
obtaining a spectrum for each of samples and determining, through compressed sensing performed on spectra obtained, three or more measurement wavelengths to be used for reconstructing the spectrum, the spectrum being a transmission spectrum or an absorption spectrum;
(i) measuring, for each of samples that are good products, wavelength components of the three or more measurement wavelengths, using the optical detection device according to claim 1, and (ii) generating reference data indicating a measurement result obtained by measuring the samples that are good products; and
(i) measuring, for a sample that whether the sample is a good product or a defective product is unknown, wavelength components of the three or more measurement wavelengths, using the optical detection device, and (ii) determining whether the sample is a good product or a defective product by performing matching between a measurement result obtained by measuring the sample that whether the sample is a good product or a defective product is unknown and the reference data.