Abstract: A fire detection method is provided. The fire detection method calculates a singular value for determining whether smoke penetrating into a chamber is caused by a fire or a non-fire by using the processor, based on n number of normalized values of scattered light and n number of normalized values of transmitted light.

Abstract: The present invention is directed to reducing non-fire alarms by distinguishing between smoke caused by an actual fire and non-fire smoke generated in daily life when an event suspected to be a fire occurs. The present invention provides an apparatus and method for determining whether a fire occurs using a smoke detector, which includes a light emitter for generating multiple wavelengths, a light receiver configured to detect light scattered by particles of smoke, and a fire determiner for checking whether the strength of a signal of the detected scattered light exceeds a threshold and generating an alarm, to use characteristics of multiple wavelengths in a photoelectric fire detection apparatus. The fire determiner calculates normalized values by normalizing measured values for the scattered light, and calculates a singular value from the normalized values as a criterion for determining whether the smoke is caused by a fire or a non-fire.

Abstract: A surface plasmon resonance imaging apparatus is provided. The surface plasmon resonance imaging apparatus includes a light irradiation unit configured to irradiate polarized light onto a metal coating film provided on one surface of a prism, a light modulator configured to spatially pattern-encode light reflected by the metal coating film and the prism, a light detector configured to detect a pattern-encoded light signal, obtained through pattern-encoding by the light modulator, as a spectral signal, a signal processor configured to spatially decode the spectral signal and analyze a decoded spectral signal to generate characteristic data of a sample provided on the metal coating film, and an output unit configured to output the characteristic data of the sample as a two-dimensional (2D) image.

Abstract: The disclosure relates to a non-dispersive infrared (NDIR) gas sensor which detects the concentration of gas with a simple structure and method by manufacturing an optical waveguide with a gas-permeable polymer material instead of a conventional cavity or chamber type. An optical signal travels through the optical waveguide of gas-permeable polymer by total internal reflection, and the gas naturally penetrates the optical waveguide without the use of separate inlet and outlet openings, so that the optical signal and gas particles come into contact with each other within the optical waveguide. Since the optical signal detected by a photodetector at the other end of the optical waveguide after traveling while contacting the gas particles has properties changed according to the concentration of the gas which they have contacted in the optical waveguide, it is possible to measure the concentration of a specific gas from the detected optical signal.

Abstract: The present invention relates to a biosensor technique in which multiple types of target substances (biomarkers) contained in saliva or the like are allowed to be simultaneously measured or N samples for one target substance (biomarker) are allowed to be simultaneously measured and reliability of sensed results and high sensitivity are secured. A fluidic channel-based planar biosensor chip, in which a plurality of fluidic channels capable of measuring target substances (biomarkers) are embedded in one flat plate sensor chip and the flat plate sensor chip is measured by a light-emitting element (optical source) and a light-receiving element, and a biomarker measuring apparatus using the same are provided.

Abstract: An optical oil component sensor and a sensing method using the sensor, which can identify similar fuel oil in real time. The optical oil component sensor includes a light source unit, a reference optical waveguide, configured to guide light thereinto, for receiving and outputting light emitted from the light source unit, a sensing optical waveguide, configured to guide light thereinto, for receiving and outputting light emitted from the light source unit, wherein a portion of the sensing optical waveguide is formed to be in contact with test target oil, a light-receiving unit for receiving both a reference light signal, output from the reference optical waveguide, and a test light signal, output from the sensing optical waveguide, and a control unit for identifying components of the test target oil by comparing optical properties of the reference light signal and the test light signal with each other.

Abstract: An optical oil component sensor and a sensing method using the sensor, which can identify similar fuel oil in real time. The optical oil component sensor includes a light source unit, a reference optical waveguide, configured to guide light thereinto, for receiving and outputting light emitted from the light source unit, a sensing optical waveguide, configured to guide light thereinto, for receiving and outputting light emitted from the light source unit, wherein a portion of the sensing optical waveguide is formed to be in contact with test target oil, a light-receiving unit for receiving both a reference light signal, output from the reference optical waveguide, and a test light signal, output from the sensing optical waveguide, and a control unit for identifying components of the test target oil by comparing optical properties of the reference light signal and the test light signal with each other.

Abstract: Provided herein is a flexible display device including a lower substrate; spacers formed on the lower substrate; an adhesive deposited on the spacers; a display material filled in between the spacers; and an upper substrate adhered to the lower substrate by the adhesive.

Abstract: Disclosed herein is an optical circuit-type reformulated fuel detecting sensor device. The optical circuit-type reformulated fuel detecting sensor device includes: an optical source part generating optical signals having a single wavelength; a sensor part receiving the optical signals generated by the optical source part and outputting a reference optical signal and a sensed signal; a first photo-detector receiving the reference optical signal and outputting a reference optical output signal; a second photo-detector receiving the sensed signal and outputting a sensed optical output signal; an operation controlling part receiving the reference optical output signal and the sensed optical output signal and determining characteristics of fuel; and an output part receiving and outputting a result of the operation controlling part.

Abstract: The present invention relates to a method for manufacturing a two-dimensional polymer optical waveguide, which is used for manufacturing a two-dimensional optical waveguide through simplified processes using a single imprint original master.

Abstract: The disclosure relates to a method for manufacturing a photoaligning integrated large area metallic stamp, which includes the following steps: making a unit device PLC mold pattern, and molding a unit PLC device pattern through a multistep imprinting method using the PLC mold pattern; heat treating the unit PLC device pattern to minimize scattering loss due to surface roughness; making a groove pattern for supporting an optical fiber; making an integrated PDMS mold for a unit device by aligning the unit PLC device pattern and the groove pattern; and repeatedly replicating the integrated PDMS mold for a unit device to make a large area PDMS pattern, and making a large area stamp through electroforming using the large area PDMS pattern.

Abstract: Disclosed herein is an optical circuit-type reformulated fuel detecting sensor device. The optical circuit-type reformulated fuel detecting sensor device includes: an optical source part generating optical signals having a single wavelength; a sensor part receiving the optical signals generated by the optical source part and outputting a reference optical signal and a sensed signal; a first photo-detector receiving the reference optical signal and outputting a reference optical output signal; a second photo-detector receiving the sensed signal and outputting a sensed optical output signal; an operation controlling part receiving the reference optical output signal and the sensed optical output signal and determining characteristics of fuel; and an output part receiving and outputting a result of the operation controlling part.

Abstract: Provided is a polymer planar optical circuit type dissolved oxygen sensor and a method of fabricating the sensor, including a polymer planar sheet embedded with a first wavelength optical signal transmission line transmitting a first wavelength optical signal emitted from a first optical source and a second wavelength optical signal transmission line transmitting a second optical signal emitted from a sensing membrane and having a fluorescent property, and the sensing membrane coated on the polymer planar sheet, and further including a second optical source emitting the second wavelength optical signal to compare an optical property of the second wavelength optical signal to an optical property of the first wavelength optical signal emitted from the first optical source.

Abstract: The disclosure relates to a method for manufacturing a photoaligning integrated large area metallic stamp, which includes the following steps: making a unit device PLC mold pattern, and molding a unit PLC device pattern through a multistep imprinting method using the PLC mold pattern; heat treating the unit PLC device pattern to minimize scattering loss due to surface roughness; making a groove pattern for supporting an optical fiber; making an integrated PDMS mold for a unit device by aligning the unit PLC device pattern and the groove pattern; and repeatedly replicating the integrated PDMS mold for a unit device to make a large area PDMS pattern, and making a large area stamp through electroforming using the large area PDMS pattern.

Abstract: The present invention relates to a method for manufacturing a two-dimensional polymer optical waveguide, which is used for manufacturing a two-dimensional optical waveguide through simplified processes using a single imprint original master.