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

Claim 4:
5. A fire determination apparatus comprising:
a light source which emits light to smoke;
a filter configured to block light which is emitted and passes through smoke particles, and allow Raman scattered light to pass therethrough;
a nanoimprint filter configured to secondarily filter the Raman scattered light passing through the filter and to send the Raman scattered light to the photodetector;
a photodetector which detects the Raman scattered light passing through the nanoimprint filter; and
a unit, which reads a Raman shift from the detected Raman scattered light, estimates a smoke component from the read Raman shift, and determines fire/non-fire from the estimated smoke component,
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.