Light and Radiation Detectors

Silicon Photodiodes are standard detectors used in photometry and radiometry in the spectral range from 200 to 1100 nm.

InGaAs Photodiodes are standard detectors used in laser applications in the NIR spectral range from 800 to 1800 nm.

SiC Photodiodes are used in UV radiation measurement. Long wave radiation above 400 nm is blocked (solar blind).

Epitaxy Photodiodes are built with a thin radiation sensitive structure which reduces the portion of slow diffusion current from deep zones generated by long wavelength photons.

Filter-corrected Photodiodes form the spectral sensitivity shape of bare photodiodes to photometric, radiometric, phototherapeutic, plant physiologic and other spectral response functions using spectral correction filters.

Bi-Tech Detectors combine filter-corrected photodiodes and diode array spectrometer to take advantage of both sensor technologies for light measurement applications.

Integrating Sphere Detectors are a combination of photodiodes and integrating spheres for luminous flux and radiant power measurements of lamps, LEDs and divergent emitting lasers and spot lamps.

Measurement of luminous flux (lm) and its radiometric equivalent radiant power (W) is used for efficiency evaluation of lamps and luminaires by comparison of electrical to light power.

Measurement of illuminance (lx) and its radiometric equivalent irradiance (W/m²) describes the incidence of light or accordingly optical radiation on a plane of reference.

Measurement of luminous intensity (cd) and its radiometric equivalent radiant intensity (W/sr) describes directional flux. Effective luminous intensity is specified for strobe lights. Spatial luminous intensity is specified for spatial light distribution.

Measurement of luminance (cd/m²) and its radiometric equivalent radiance (W/m²sr) describes the light emission of luminous planes. Luminance contrast defines the bright/dark ratio.

Measurement of LASER power (W) is identical to radiant power measurement. The measurement technique is different because of the characteristics of gas and diode lasers.

Human visual perception is based on the three Red, Green, Blue color sensitive cell types (cone cells). RGB color sensors for RGB luminous color measurement work according to the same principle.

The spectral measurement technique calculates luminous color from spectral measurement data using the red, green and blue CIE spectral response functions of the cone cells.