Apparatus for measuring Raman scattering, and apparatus and method for determining true fire using the apparatus

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.

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.