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Last Updated on: Wednesday, April 28, 2010 03:53 PM

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LASER/LED LIGHT OUTPUT INTENSITY METER
This circuit uses a large 1cm X 1cm silicon PIN photo diode and a transimpedance amplifier to measure the light power output of infrared and visible LEDs and laser diodes. It can be modified to produce almost any milliwatts to volts scale factor. It can be connected to either a multi-meter or an oscilloscope.
 

Click on Drawing Below to view PDF version of Schematic

Circuit Laser / LED Power Output Monitor designed by David A. Johnson, P.E. (July 8, 2000)

Master Schematic Category List  -  David A. Johnson, P.E.
Amplifiers: Transimpedance    
Freespace or Light Beam Communication  
Laser Circuits     Light Detectors or Optical Sensors
 
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