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Spectra USB Sensors

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Spectra USB Sensors:
Universal LightProbe Spectra USB Sensors test a wide range of LED intensities and
any colour in the visual spectrum, plus white, providing a linear response with a
serial digital output via a PC.  
Characteristics
- A standard mini-type B five-pin USB connector is integrated into the
  Spectra USB Sensor, and a standard USB Cable is provided
- Typical response time: < 250mS for colour and intensity as a serial
  bit-stream (19200 baud rate)  
Color and White Response
-Test any colour wavelength, from 400-700nm & white
- Provides serial-digital output of LED colour
- “w” = color wavelength in tenths of nanometers
- Or, for white, “w” = a value that corresponds to CCT
  (see Application Note 39)
- Display/print-out the linear response with Tera Term software
  (included with purchase) See AN46 for details on LabView VISA
- Colour output is independent of LED intensity
- Unique streaming technology enables LED colour wavelength
  (and intensity) to be rapidly and simultaneously accessed by a
  PC and displayed/printed-out
- Reduces test time and provides continuous automatic data
  logging for statistical process control (SPC). 
- Multiport display is available
Intensity Response 
- Provides serial digital output for LED intensity
- “i” = intensity, from 0 to 65,0000
- Output corresponds to LED luminous intensity in milli
  candelas,
as seen in most
LED manufacturers’
specifications
-
C.I.E. photopic-curve-corrected

- Tests LEDs from 0.03mcd to 18,300mcd; up to 293,000mcd
   with the Spectra USB Very-Low Sensitivity Sensor
- Read-out of 4 indicates under-ranging - LED is too dim
- Read-out > over 65,000 indicates over-ranging - LED
too bright; Spectra USB Low-Sensitivity Sensors available
- Intensity response depends on size of LED, the aperture of
  the fiber-optic probe and the distance between the probe
  tip and the LED emitter; for more information on Sensor
  Sensitivity Responses in millicandelas, please see AN 35
- Available in Low and Very-Low Sensitivity models for the 
  test of extremely bright LEDs