Increasingly important - Imaging photometers and colorimeters

The use of imaging photometers and colorimeters for fast recording of photometric and colorimetric quantities with spatial resolution has attracted increasing interest. Compared with measuring instruments without spatial resolution, such as spectrometers, this technology from Instrument Systems offers the following advantages:

  • Substantial time-savings with simultaneous capture of a large number of measurements in a single image
  • Comprehensive image-processing software permits automated methods of analysis, e.g. calculation of homogeneity or contrast

Imaging photometers and colorimeters are the instruments of choice for:

  • Measurement of luminance and color distribution of panel graphics, switches and instrument clusters for vehicles
  • Measurement of homogeneity, contrast, and mura of flat-panel displays
  • Homogeneity analysis of lamps and luminaires used in general lighting
  • Capturing luminance distribution curves of small lamps and luminaires

Instrument Systems developed different measurement systems with the focus on the applications mentioned above.

The LumiCam 1300 Systems:

You will find detailed information in the LumiCam Series brochure.

The LumiCol 1900

The LumiCol 1900 combines a precise spot colorimeter with an RGB CMOS sensor for fast 2D image acquisition. As a result, the LumiCol 1900 enables a very fast and precise characterization of the whole display area in one shot.

The LumiTop System

The innovative 3-in-1 system merges a LumiTop 2700 camera and a flicker-diode with a high-end CAS140 spectroradiometer. The LumiTop system guarantees spectroradiometric precision across the whole 2D image within extremely short measuring times. It is perfectly suited for use in display production lines and quality control.

LumiCam 1300 Advanced Video

Imaging colorimetric measurement

In this measuring procedure, the colorimeter displays the device under test (DUT) on a CCD sensor using an objective lens and the V(λ) or tristimulus filters mounted behind. At the end of the measurement, calibrated luminance and color values are available for each pixel in the field of view. Analyses of complex image content can be carried out over flat surfaces easily, quickly, accurately and reproducibly. The adjustment quality of the filter to the sensitivity curves x̄, ȳ, z̄ determines the measuring accuracy. Many cameras have three filters for calculating the tristimulus values X, Y, Z, corresponding to the curves x̄, ȳ, z̄. However, the x̄ function has two spectral ranges which can only be imprecisely represented using a single filter. The colorimeters of the LumiCam 1300 family therefore operate with at least 4 filters. They present a genuine alternative to spectroradiometers, particularly for the measurement of flat elements, and combine accuracy with speed and flexibility.