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OPTICAL RADIOMETRY and PYROMETRY LABORATORY |
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Quantity
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Unit
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Tasks
of the laboratory
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International
comparisons
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Available
metrological services |
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Calibration
of optical radiometers and optical radiation sources.
Spectroradiometers calibration in spectral responsivity
in spectral range from 300 nm to 10500 nm with the total
uncertainty of (0.14 - 2.5) % in accordance withe the
spectral range and responsivity of calibrated radiometer. |
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Methods
of measurement: |
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- the basic
method of radiometers and spectroradiometers calibration
is the comparison method using standard radiometers,
spectroradiometers and suitable optical radiation sources
consisted of monochromator and other optical (filtres,
reflectors, lenses, etc.) and mechanical elements
(diaphragms, modulators, etc.). For the purpose of
optical radiometers calibration the procedures were
elaborated at the SMU and the international standards
e.g. EN 613 Calibration of fibre optic power meter
are used. The basic primary standard radiometers are
compared to the metrological laboratories abroad (Key
comparison CCPR-K2.a, CCPR-K2.b). The total uncertainty
of measurement (0.14 - 2.5) % is dependent on spectral
band, level of irradiation or radiant flux. |
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Instruments
in use |
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The
equipment of radiometric laboratory consists of a set of
optical radiometers and spectroradiometers for different
spectral regions and energetic levels, optical radiation
sources and equipment for broadband and spectral
measurement. |
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Supplementary
activities |
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With the
exception of activities mentioned above, the laboratory
participates in projects of metrological assurance for
various areas of optics and optoelectronics. Besides
common metrological services the laboratory provides
expertises including measurements as follows:
- calibration of UV radiometers on Hg and Ne lines up to
the value of radiant flux of 50 µW resp. 500 mW;
calibration of monochromators at the wavelength of Hg,
Ne, Cd, Na and other discarge lamps in the spectral band
300 - 2800 nm, resp. a monochromator scale checking in
medium and infra-red bands; radiometric measurement of
emittance with temperatures greater than 300K;
measurement of transmittancy factor, directional and
total reflection in IR and visible band of optical
spectrum; expect evaluation of optical system power
engineering in visible and IR band optical spectrum;
measurement of basic parameters of optical detectors and
their evaluation according to the needs of user;
theoretic analyses of transfer energy by optical
radiation; measurement of refractive index in IR spectral
band. |
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