Photometry
Our precise luminance meters are used for distance or attachment measurement for light sources of all kinds. This allows compliance with regulations to be checked for minimum or maximum brightness, to ensure the quality requirements for products with displays or luminaires, to determine the need for maintenance due to aging or to optimize the uniformity of illumination.
Our core competence lies in the testing of automotive light sources, e.g. headlight systems.
Color measuring camera
Our color measurement camera enables the complex evaluation of luminous and illuminated scenes using the image of a spatially resolved luminance distribution with simultaneous recording of a large number of interconnected measured quantities.
Result data:
- Luminance distribution in a measurement image L (x, y)
- Derived photometric parameters such as illuminance distribution E (x, y) and luminous intensity distribution function I (x, y)
- Statistical data for direct further processing in calculation programs (for example EXCEL®, MatLAB®, LabVIEW®)
Our services
- Implementation of vibration measurements, e.g. with test objects or with circumferentially rotating machines.
- Analysis and evaluation of vibration loads
Technical data
Color measuring camera Techno Team LMK 5-1 Color
Standard resolution | 1380 x 1030 Pixel |
|---|---|
| High resolution | 2448 x 2050 Pixel |
| Measuring times | 1 Sek. – 15 sec. |
| Dynamic range | Color high dynamic measurement [ 1:10000000 (~140 dB) ] |
| Data interface | Gigabit Ethernet Interface (GigE®) |
| Spectral adaptation | •With full glass filters adapted to the V(λ) function for the luminance function •Adapted with full glass filters to the X(λ), V(λ) and Z(λ) functions to measure color values •Further full glass filters for the functions C(λ),V'(λ) and BLH (blue light hazard) as well as IR filters are available |
| Meteorological data Color measuring camera Techno Team LMK 5-1 Color | |
| Metrological specifications | V(λ) [ f´1 < 3,5%1]; X(λ) [ f*1 < 4% ] Z(λ) [ f*1 < 6% ]; V´(λ) [ f*1 < 6% ] |
| Luminance | L (cd/m²) |
| Color coordinates | x,y |
| Supported color spaces | RGB, XYZ, sRGB, EBU-RGB, User, Lxy, Luv, Lu’v’, L*u*v*, C*h*s*uv, L*a*b*, C*h*ab, HIS, HSV, HSL,WST |
| Measuring ranges (exposure times or integration times) | 100 µs...15 s |
| Accuracy class depending on the lens (aperture number = F): | 1ms ... approx. 7500 cd/m² & 3 s ... approx. 2,5 cd/m² (F = min.) 1ms ... approx. 60000 cd/m² & 3 s ... approx. 20 cd/m² (F = max.) |
| Calibration uncertainty | Fix focused lenses ∆L [ < 2% ] Focusable lenses ∆L [ < 2,5% ] |
| Repeatability | ∆L [ < 0,1% ]?∆x,y [ < 0,0001 ] |
| Measurement accuracy | ∆L [ < 3% (for standard illuminant A) ] ∆x,y [ < 0,0020 (for standard illuminant A) ] ∆x,y [ < 0,0100 (Test color set)] |
| Uniformity | ∆L [ < 2% ] |
Goniometer
The goniometer allows precise angular alignment of objects to a fixed point above the center of the build-up area.
The photometer head is holding static and faces the test sample while the test sample rotates about the horizontal axis and the vertical axis to obtain light intensity and illuminance of the tested lamp or luminaires with up to 0.01 ° angular accuracy.
Our services:
- Light distribution
- Illuminance
- T-test
- Scanning test
- Automatic targeting
Technical data
Goniometer Everfine GO-HD5
Rotation range of the luminaires | ± 180° (left-right), ± 90° (up-down) |
|---|---|
| Accuracy of the angle | Up to ± 0,01° |
| Maximum load of the goniometer | 35 kg |
| Photometer head | CLASS L (f1 '<1,5%) or CLASS A (f1' <3,0%) V (λ) correction |
| Measuring range of illuminance | 0,0001lx-200klx (automatic range) |
| Photometric linearity | 0,2 % |
| Software | Software according to common standards like GB, ECE, FMVSS108, JIS etc. |
| Measurement speeds | Fast / medium / slow measuring speeds are selectable |
Integrating sphere
The Ulbricht sphere is used as a light source to reach diffuse radiation from directed radiation or to collect the radiation of strongly divergent sources. This measures the luminous flux emitted by a light source.
Technical data
Integrating sphere Everfine
Size | Ø 0,3 m & Ø 1,0 m |
|---|---|
| Thermostatic methods | Environmental conditions, automatic temperature constant |
| Coating property | SpektronTM coating, diffuse reflection, long-lasting and optically stable over time |
| Coating reflectivity | R97, R80, UV |
| Geometry | 4π (lamp mounted in the middle) 2π (lamp mounted on the side, top or bottom) |
