Radiance Meters

The uRAD-LL Handheld Radiance Meter bundle combines a filtered silicon sensor with a fixed-focus lens to provide non-contact radiance measurement of an area on the surface of an extended source. Spot size is dependent working distance, which ranges from 17 mm to infinity.

The system’s radiance calibration is programmed into the handheld portable optometer. Measurement results are displayed by the optometer in units of (W/m²sr), and digital data can be acquired directly via PC.

The uRAD-I Radiant Intensity Meter bundle combines a filtered silicon sensor with an intensity adaptor and a precision LED socket to provide simple and accurate measurement of radiant intensity in units of Watts per steradian (W/sr). The system can easily be configured for either of the CIE-prescribed geometries:

  • Averaged Luminous Intensity – CIE 127 Condition A
  • Averaged Luminous Intensity – CIE 127 Condition B

The system’s radiant intensity calibration is programmed into the benchtop optometer. Measurement results are displayed by the optometer in units of (W/sr), and digital data can be acquired directly via PC.

LED Types Supported

The standard socket supplied with this bundle is compatible with common bi-pin packages such as T1, T1-3/4, and T0. A range of alternative sockets are available, supporting both industry standard packages and proprietary packages for manufacturers including: Cree, Epistar, Everlight Electronics, Nichia, OSRAM, Philips Lumiled, Seoul Semiconductor.

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uRAD-LL Handheld Radiance Meter System Components
  • RadiometerModel S471: Portable Radiometer with LCD display and RS-232 Interface; 50 programmable calibrations; AC or battery-powered
  • Radiometric SensorModel 247 Radiometric Sensor with flat spectral response; adapted to the Model 1153 for radiance measurement
  • Radiance Adaptor – Model 1153: Fixed-focus lens for luminance or radiance measurements; 13° Field of View
  • Radiance Calibration – U68073: From 350 to 1100 nm – NIST Traceable in units of Watts per square meter per steradian (W/m2sr)
  • Alternative Radiometer – S470 flexOptometer: Benchtop Radiometer, Single Channel; IEEE-488, RS-232, RS-485, USB
uRAD-I Radiant Intensity Meter System Components
  • Radiometer – S470 flexOptometer: Benchtop Radiometer, Single Channel; IEEE-488, RS-232, RS-485, USB
  • Sensor – Model 424R Radiant Intensity Head: Filtered Silicon sensor with flat spectral response; CIE 127 A/B intensity adaptor
  • Socket – Model 40044 LED Test Socket: For standard regular, mini, and sub-mini bi-pin type LEDs (T1, T1-3/4, T0); 4-lead monitoring capability
  • Radiant Intensity Calibration – U68073: For each of two Conditions (CIE127 A and B); 350 to 1100 nm; NIST Traceable in units of (W/sr)
  • Alternative Radiometer – Model S471: Portable Radiometer with LCD display and RS-232 Interface; 50 programmable calibrations; AC or battery-powered

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