Patent ID: 11959857
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A method of determining fire, comprising:
emitting light to smoke:
performing filtering for blocking light passing through smoke particles and allowing Raman scattered light to pass;
secondarily filtering the filtered Raman scattered light:
detecting the secondarily filtered Raman scattered light;
reading a Raman shift from the detected Raman scattered light;
estimating a smoke component from the read Raman shift; and
determining fire/non-fire from the estimated smoke component,
wherein the secondary filtering is performed by a nanoimprint filter,
wherein the nanoimprint filter is configured to decrease a predetermined wavelength range of a detection sensor constituting the photodetector by limiting a range of a wavelength of the Raman scattered light to correspond to a detection characteristic of the photodetector.