Measurement of Light – Measurement with Light
  Measuring devices for optical radiation

Product Categories

Light Meters - Photometry, Radiometry and Colorimetry

Gigahertz-Optik GmbH manufacturers a wide range of handheld and benchtop measuring instruments for precise optical radiation measurements. Photodiode detectors with photometric, colorimetric and radiometric (ultraviolet to near infrared) responsivities can be configured with any one of our optometers to suit numerous measurement tasks.


Spectroradiometers from Gigahertz-Optik GmbH are offered for a wide range of applications in the ultraviolet to near infrared spectral range. Handheld, laboratory and weatherproofed variants are available. These high performance spectroradiometers suit many demanding applications such as LED production and investigation of solar radiation. Accessories for an extensive range of applications are available.


Spectrophotometers are used to measure the reflection, transmission and absorption of liquid and solid materials. Gigahertz-Optik GmbH offers:

  • handheld spectrophotometers for the measurement of spectral light transmission
  • integrating spheres for use in UV / VIS spectroscopy
  • reflection standards

Integrating Spheres

We offer integrating spheres for the most varied range of applications in the ultraviolet to mid infrared range. Our "Modular Integrating Sphere" concept allows the individual construction of your own unique integrating sphere requirements.

Uniform Light Sources

Uniform light sources from Gigahertz-Optik GmbH are used to adjust the pixel sensitivity uniformity and the linearity of image sensors and hyperspectral image cameras. They are also used to calibrate luminance and spectral radiance. With our “Modular Integrating Sphere“ concept, Gigahertz-Optik GmbH is able to satisfy bespoke system requests from customers.

Reflectance Materials

We offer diffuse reflective materials (synthetic and barium sulfate) for the ultraviolet to near infrared spectral range. In addition, we manufacture integrating spheres, laser cavities and reflection standards from these materials.

Calibration Standards

We offer a wide range of traceable calibrated reference lamps, detectors and reflection standards for the calibration of optical radiation meters, spectroradiometers and optical sensors.

Other Products

To facilitate the widest range of applications, Gigahertz-Optik GmbH produces many complementary products for use with our measurement instrumentation. These include goniometers, integrating spheres, data acquisition and control electronics, for example. We support our customers in setting up ready-to-use measuring systems using our measuring instruments and complementary products.

Light measurement technology directly from the manufacturer

Gigahertz-Optik GmbH provides more than thirty years of experience in the development, production, calibration and distribution of optical radiation measurement equipment for use in the ultraviolet to near infrared spectral range.

As an independent company, Gigahertz-Optik GmbH offers the high flexibility of a medium-sized German manufacturer, able to react to the needs of our customers and markets. Due to the individual, intensive support of end users and OEM customers across many sectors of research and industry, Gigahertz-Optik GmbH has won the long-term recognition and respect of its customers worldwide.

The needs of our customers in North and South America are fully serviced by our subsidiary Gigahertz-Optik Inc., Massachusetts.


Since 1986, Gigahertz-Optik GmbH has been supplying contemporary and innovative measurement technology offering our customers both accuracy and ease of use. Close cooperation with our customers is a constant driver of innovation for our sales and development teams. Our main products include photodetector based light meters, spectroradiometers, spectrophotometers, integrating spheres and calibration standards.


In addition to our continual innovation, Gigahertz-Optik GmbH has always paid special attention to the quality of its products and services. In particular, we have always sought the best possible calibration for our products. This is notably reflected in the accreditation of our calibration laboratory for optical radiation measurements for the measurement of spectral sensitivity and spectral irradiance according to ISO / IEC 17025 (Deutsche Akkreditierungsstelle GmbH, DAkkS D-K-15047-01-00).


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Our application categories at a glance