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  • Handheld BTS256-LED
Oct 2009
Gigahertz-Optik GmbHRequest Info
Color and Light Meter
PUCHHEIM, Germany, Oct. 19, 2009 – Gigahertz-Optik GmbH’s handheld BTS256-LED is designed to measure luminous flux or illuminance, color data and spectral distribution of printed circuit board-mounted LEDs, discrete LEDs within a module, miniature lamps, endoscopes and any narrow beam-emitting light source. Larger size light sources can be measured by either attaching the LED tester to the company’s integrating sphere or by measuring illuminance using a screw-on diffuser window.

Gigahertz-Optik_Spectroligh.jpgKey components of the device include a built-in 50-mm-diameter integrating sphere with an interchangeable input optic nozzle designed to minimize positional error, an auxiliary LED and the company’s BTS256P bi-technology light sensor.

The integrating sphere is made out of proprietary ODM98 white diffuse material and includes a sealed window light output port. The light sensor houses a high-precision photometric filtered photodiode for accurate flux detection over a wide dynamic range and a compact low stray light design spectrometer.

Another key feature is the ultracompact electronically controlled shutter for on-line offset compensation of the diode array for improved signal to noise levels. Spectral flux distribution in watts per nanometer as well as peak wavelength, dominant wavelength, X-Y and u’v’ color coordinates, color temperature and color rendering index are measured and displayed. The measured spectral data is also used for on-line correction of the photometric detector for any photopic spectral mismatch error.

A white LED auxiliary lamp is included to compensate test sample absorbance errors. The PC-operated LED tester, auxiliary lamp function and calibration correction for different size input nozzles are all controlled via the supplied software.

For more information, visit:  

Gigahertz-Optik GmbH
Postfach 1445
D-82170 Puchheim
Phone: +49 89 8901 59 0
Fax: +49 89 8901 59 50


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color rendering index
A CIE index describing the changes in color of standard test objects when the illumination is changed from a standard to a test illuminant.
color temperature
A colorimetric concept related to the apparent visual color of a source (not its temperature). For a blackbody, the color temperature is equal to the temperature in kelvin.
dominant wavelength
A single wavelength of light that matches the color of a given sample when combined in suitable proportions with white light and a suitable adjustment of intensity.
Luminous flux incident per unit area of a surface; luminous incidence. (The use of the term "illumination" for this quantity conflicts with its more general meaning.)
integrating sphere
A hollow sphere coated internally with a white diffusing material and provided with openings for incident beam, specimen and detector used for measuring the diffuse reflectance or transmittance of objects.  
luminous flux
Descriptive of the radiant power of visible light modified by the eye response. It is the measure of the flow of visible light energy past any given point in space in a given time period, and is defined as the amount of flux radiated by a source of 1 candela into a solid angle of 1 steradian.
peak wavelength
The wavelength at which the radiant intensity of a source is maximum.
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
A kind of spectrograph in which some form of detector, other than a photographic film, is used to measure the distribution of radiation in a particular wavelength region.  
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