STE India has the best solution to measure light with accuracy and precision. Lead in CFL and LED test instruments. Our main products are Spectroradiometer, Goniophotometer and Integrating sphere. Our Spectroradiometer has the feature for photobiological safety. For any query please visit www.ledtesting.co.in or write to steindiamkt@gmail.com
It is defined as the light intensity per unit area. The luminance shows what amount of luminous power will be noticed by an eye looking at the surface from a particular angle of view. Luminance is an indicator of the brightness of the light on the surface.
The formula to calculate Luminance = I/A
Where I am the intensity of light (candela) and A is area (m2)
SI units of cd/m2
CGS Units is stilb.
1 stilb= 104 cd/m2
Luminance is generally used to denote the emission or reflection from flat, diffuse surfaces.
Exposure to high Luminance can damage the retina due to local heating. Photochemical effects can also cause injury, mainly at short wavelengths.
So the measurement of Luminance is very important. STE has the best probes to measure Luminance. We offer a variety of optical probes for radiometric/ Photometric measurements. They differ in spectral range, the degree of cosine correction and a type of optic fibre.
Each complete set includes a measuring probe, a fibre optic cable, and adapter for a dedicated spectrometer. Includes calibration traceable to National Laboratories.
| Probe | Image | Features | Works with Spectroradiometer |
| GL OPTI PROBE 1.0.10 luminance
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Luminance probe for point measurement of flat displays, LCD, LED, OLED panels, projection displays and indicating lights.. Body prepared for photographic tripod attachment. The set can be spectrally calibrated only in a range above 400 nm. |
GL Spectis 1.0
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| GL OPTI PROBE 1.0.11 luminance
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Pen type luminance probe for point measurement of flat displays, LCD, LED, OLED panels, projection displays and indicating lights. The set can be spectrally calibrated only in a range above 400 nm. |
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| GL OPTI PROBE 5.0.10 luminance
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Luminance probe for point measurement of flat displays, LCD, LED, OLED panels, projection displays and indicating lights.. Body prepared for photographic tripod fitment. This probe covers the full spectral range from UV to IR within the range of the used spectrometer. |
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| GL OPTI PROBE 5.0.52 luminance telescope
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Luminance measuring telescopic probe with quartz optic fibre ensures a perfectly parallel beam of observation. Can be fitted on a tripod. Spot diameter 8mm at distance 0.5m. This probe covers the full spectral range from UV to IR within the range of the used spectrometer. Alternative acceptance angles available on request.. |
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| GL OPTI PROBE 5.0.51 luminance
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Pen type luminance probe for point measurement of flat displays, LCD, LED OLED panels, This probe covers the full spectral range from UV to IR within the range of the used spectrometer. |
GL Spectis 5.0
or GL Spectis 6.0 or GL Spectis 8.0
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| GL OPTI PROBE 5.0.53 radiance telescope
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Radiance Telescope for measurements in accordance to standard IEC62471. Acceptance angles of 0.1rad and 0.011rad achieved by included diaphragms. Spectral range 300-1050nm. The spectral range of the accessory depends on the range of the used spectrometer. | |
| GL OPTI PROBE 52.0.53 radiance telescope
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UV-VIS-IR Radiance Telescope for measurements in accordance to standard IEC 62471. 2 separate channels for UV-VIS-NIR and IR spectrometers to cover spectral range 300- 1400 nm. Included optic fibers and adapters for two spectrometers working in parallel connection. Acceptance angles of 0.1rad and 0.011rad achieved by included diaphragms. *The spectral range of the accessory depends on the range of the used spectrometer. |
