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A turbomachine, in particular a gas turbine, includes a rotor which extends along an axis of rotation. The rotor includes a circumferential face, which is defined by the outer radial boundary surface of the rotor, and a receiving structure. Additionally, it includes a first rotor blade and a second

A turbomachine, in particular a gas turbine, includes a rotor which extends along an axis of rotation. The rotor includes a circumferential face, which is defined by the outer radial boundary surface of the rotor, and a receiving structure. Additionally, it includes a first rotor blade and a second rotor blade, which each have a blade root and a blade platform. The blade platform of the first rotor blade and the blade platform of the second rotor blade adjoin one another, and a space is formed between the blade platforms and the circumferential face. A sealing system is provided on the circumferential face in the space, the sealing system including a labyrinth sealing system.

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A turbomachine, in particular a gas turbine, includes a rotor which extends along an axis of rotation. The rotor includes a circumferential face, which is defined by the outer radial boundary surface of the rotor, and a receiving structure. Additionally, it includes a first rotor blade and a second

A turbomachine, in particular a gas turbine, includes a rotor which extends along an axis of rotation. The rotor includes a circumferential face, which is defined by the outer radial boundary surface of the rotor, and a receiving structure. Additionally, it includes a first rotor blade and a second rotor blade, which each have a blade root and a blade platform. The blade platform of the first rotor blade and the blade platform of the second rotor blade adjoin one another, and a space is formed between the blade platforms and the circumferential face. A sealing system is provided on the circumferential face in the space, the sealing system including a labyrinth sealing system. am to produce a second detected signal; a second lock-in amplifier electrically configured to receive said reference signal and said second detected signal, wherein said second lock-in amplifier produces a second amplified analog output signal having an amplitude that is proportional to said second detected signal; and a computer system implementing an algorithm for calculating true temperature and emissivity from said first amplified analog output signal and said second amplified analog output signal. 2. The apparatus of claim 1, further comprising means for measuring background temperature near the detectors, wherein variations in the background level arising from temperature drifts may be compensated by independently measuring the background temperature and applying temperature dependent corrections to said first detected signal and said second detected signal. 3. The apparatus of claim 1, further comprising a thermocouple for measuring ambient temperature at said target. 4. The apparatus of claim 1, further comprising a laser for irradiating said target, said apparatus further comprising a feedback loop to control laser power output during irradiation of biological tissues for laser tissue welding. 5. The apparatus of claim 1, wherein: said fiber optic comprises a 700 μm-bore hollow glass optical fiber coated with a dielectric layer on its inner surface, said light chopper comprises a gold-coated planar chopper, said first photoconductor and said second photoconductor comprise thermoelectrically-cooled HgCdZnTe photoconductors, wherein the spectral bandpass of one photoconductor is 2-6 μm and the spectral band pass of the other photoconductor is 2-12 μm and their response times are <100 ns and <10 ns, respectively, said apparatus further comprising a light-tight housing which contains a port through which said fiber optic extends. 6. A method for non-contact real-time true temperature and emissivity measurement of a target, comprising: collecting light from said target, wherein said light is collected into a single fiber optic comprising a first end and a second end, wherein light from said target is collected at said first end, propagates through said fiber optic and emerges from said second end to produce transmitted light; chopping said transmitted light, wherein said light chopper is positioned to receive said transmitted light, wherein said transmitted light is periodically chopped and directed into a first beam, wherein said transmitted light is periodically chopped and transmitted into a second beam, wherein said light chopper provides a reference signal indicating the duty cycle of said light chopper; detecting said first beam with a first photoconductor optically positioned to receive and electrically configured to detect said first beam to produce a first detected signal; producing a first amplified analog output signal with a first lock-in amplifier electrically configured to receive said reference signal and said first detected signal, wherein said first lock-in amplifier produces said first amplified analog output signal having an amplitude that is proportional to said first detected signal; detecting said second beam with a second photoconductor optically positioned to receive and electrically configured to detect said second beam to produce a second detected signal; producing a second amplified analog output signal with a second lock-in amplifier electrically configured to receive said reference signal and said second detected signal, wherein said second lock-in amplifier produces said second amplified analog output signal having an amplitude that is proportional to said second detected signal; and calculating the true temperature and emissivity of said target from said first amplified analog output signal and said second amplified analog output signal. 7. A method for non-contact real-time true temperature and emissivity measurement of a target, comprising: collecting light from