Dual spectral variable-based optical frequency scanning laser light source and measurement device using the same and object angle-dependent distance measurement device using propagation angle switching for each optical frequency

A measurement device using a dual-spectral variable-based oscillation optical frequency scanning laser light source, the measurement device comprising:

• an oscillation optical frequency scanning laser light source unit which sequentially scans the optical frequency of oscillated laser light as both selective variation of an optical band by a transmission optical band variation unit and selective variation of an optical frequency by a resonant optical frequency variation unit occur;
• a beam splitter which induces multichannel information transmission and acquisition as light of different optical frequencies caused by selective variation of the optical band by the resonant optical frequency variation unit is divided by optical frequency channel division and travels to optical fibers;
• a receiver in which a diagnostic target is positioned so that light is transmitted to optical fibers and reflected on the optical fibers from the diagnostic target;
• a mixer which induces an optical interference signal;
• and
• an optical measurement unit which scans and measures optical fiber information of the diagnostic target over time from the optical interference signal through selective oscillation and variation of the optical frequency by the resonant optical frequency variation unit, the optical fiber information corresponding to channels for different optical frequencies.

A measurement device using a dual-spectral variable-based oscillation optical frequency scanning laser light source, the measurement device comprising:

• an oscillation optical frequency scanning laser light source unit which sequentially scans the optical frequency of oscillated laser light as both selective variation of an optical band by a transmission optical band variation unit and selective variation of an optical frequency by a resonant optical frequency variation unit occur;
• a beam splitter in which light transmitted from the oscillation optical frequency scanning laser light source unit causes different channel variations through selective variation of a specific transmission optical band;
• a receiver in which a diagnostic target is positioned so that light is transmitted from the beam splitter and reflected from the diagnostic target;
• an optical detection unit which converts a variation in an intensity of the light transmitted and reflected back from the receiver into an electric signal over time;
• and
• an optical measurement unit which obtains light spectrum information for each optical frequency of the diagnostic target from the variation over time of the electric signal transmitted from the optical detection unit.

An object angle-dependent distance measurement device using propagation angle switching for each center optical frequency, that uses a dual-spectral variable-based oscillation optical frequency scanning laser light source, the object angle-dependent distance measurement device comprising:

• an optical frequency scanning laser unit which produces light whose center frequency changes continuously over time;
• a mixer diffractive waveguide which propagates light transmitted from the optical frequency scanning laser unit in a space by varying an optical frequency angle with the center optical frequency of the light;
• and
• an optical detection unit which converts an intensity signal of the propagated light transmitted and reflected back from a target into an electric intensity signal over time,
• wherein a distance to an object located based on the propagation angle corresponding to the center optical frequency of the propagated light is measured by extracting distance information of the target from the electric intensity signal converted by the optical detection unit.