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BTS2048 Series - UV-VIS-IR Spectroradiometer

BTS2048 Series - UV-VIS-IR Spectroradiometer
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BTS2048 Series - UV-VIS-IR Spectroradiometer - 2

SPEKTRALRADIOMETER Merkmale wie Genauigkeit, Stabilität, optische Güte und Reproduzierbarkeit sind Kenngrößen welche die Qualität eines Spektralradiometers widerspiegeln, diese sind jedoch nicht ausreichend für die Richtigkeit der Messwerte. Die Richtigkeit der Messwerte in der Anwendung wird zusätzlich durch weitere Einflussgrößen wie Umwelt- und Handhabungsparameter bestimmt. Bei der Auswahl eines Spektralradiometers sollten daher neben seinen technischen Parametern auch Merkmale wie Funktionalität, Handhabung sowie eine vollständige rückführbare Kalibrierung berücksichtigt werden. Die...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 3

The correctness of a measured value is always associated with a measurement uncertainty; the amount of this uncertainty depends on several parameters, e.g.: ●C alibration uncertainty of the spec- ●M etrological quality of the spectro- radiometer (wavelength precision and stability, linearity, stray light, etc.) ●E nvironmental influences ●O perating and handling conditions In order to offer a high quality calibration and characterization of the BTS2048 series spectroradiometers, the calibration procedure includes several steps: ●F actory calibration of the linearity of all the pixels in the...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 4

SPECTRAL PURITY Stray light suppression in BTS2048 UV-VIS-IR spectroradiometers is achieved through both technological design considerations and correction methods: Spectroradiometers are required to measure absolute radiometric quantities... Spectroradiometers are required to measure absolute radiometric quantities within narrow wavelength intervals over a given spectral region. However, complete spectral purity within each of the desired narrow wavelength intervals is not possible. In part, this can result from the spectrometer’s imperfect slit function (optical bandpass effects), but...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 5

One of the key requirements for capturing HDR spectra is that the detector array has no cross-talk between the pixels. This is the only way to avoid a false signal being generated in neighboring pixels when the pixels are overexposed. Furthermore, very good linearity of the measurement system is important, in order to stitch together the single measurements without measurement errors. The exposure time of spectrometer arrays will be adjusted according to the maximum intensity measured. The exposure time (integration time) of spectrometer arrays will be adjusted according to the maximum...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 6

The data-logging of spectral measurements of light sources whose emission spectrum changes rapidly with time requires the handling of immense amounts of data. Several criteria determine the maximum possible recording rate: ●F or CCD arrays, sensitivity is set by the integration time and any additional optical attenuation filters. The wide range of integration times of the BTS2048 UV-VIS spectroradiometer from 2 μs up to 4 s or 60 s (depends on version) enables measurement over a very wide dynamic range without changing the attenuation filter thereby avoiding any measurement interruption or...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 7

In CCD arrays, the charges resulting from the exposure of each pixel within the sensor are successively transported through a shift register to a central A / D converter. The pixel charges are measured one after the other. For very short measurements (µs range) mechanical shutters are too slow, hence some pixels might still be exposed to light during the mechanical shuttering process. In order to overcome this, it is necessary to set the responsivity of all pixels to zero before and after the measurement simultaneously. This is done with the electronic shutter of the BTS2048...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 8

ABSOLUTE RADIOMETRIC MEASUREMENTS Spectral irradiance Photometric unit: Illuminance Diffuser with precise cosine field of view function. Directly attached to the instrument (standard version). Photometric unit: Luminous flux Spectral radiant flux W / nm Hinge frame integrating sphere for 4Pi emitters. One hemisphere for opening. Height-adjustable sample holder. Auxiliary lamp. Option: Re-calibration lamp Gigahertz-Optik manufactures a wide range of accessory optics in standard and custom designs for the BTS2048 UV-VIS-IR spectroradiometers with associated calibrations traceable to National...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 9

application example One of the biggest challenges for a spectroradiometer is its use outdoors. It‘s not just about weatherproofing the device. The real challenge is to maintain high standards of accuracy, robustness, and repeatability under acute environmental conditions. From the standpoint of robustness, several parameters have to be considered for outdoor use: ●M echanical stability in static and moving applications cold ambient conditions as well as direct sunlight For monitoring solar UV radiation and the resulting UV index, double monochromators were the standard measuring instrument...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 10

A special feature of the BTS2048 spectroradiometer is its integrated diffuser. In combination with its compact dimensions, the BTS2048 instrument is suitable for measuring spectral irradiance, illuminance and light color while mobile. In addition, they can be attached directly to goniometers, integrating spheres, radiance optics, etc. The additional complexity and cost of a light guide with the required precision connector is avoided. Despite all these features, even the BTS2048 series compact spectroradiometers may be too big for some applications or the direct use of electronics in the...

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BTS2048 Series - UV-VIS-IR Spectroradiometer - 11

application example The BTS2048 is an extremely compact self-contained spectroradiometer. Formerly, high accuracy spectroradiometers only came in bulky housings many with heavy base plates limiting their portability and mobility. This type of spectroradiometer generally required connection into the application via flexible fiber optic light guides. The BTS2048 is an extremely compact self-contained spectroradiometer. It easily mounts into existing apparatus ready to operate without the de-stabilizing effects of light guides. Nevertheless, it offers all the necessary features and...

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