Alan Stummer
Research Lab Technologist

Integrating Spheres

Warning:  This is a work in progress.  Take everything with a grain of salt!

I am curious who uses what.  Are these webpages a waste of time, or are they any help to others?  Are the circuits, software and utilities appearing in other labs?  Please send your comments or suggestions or what you have used (or not) or schematics of your version or pictures or anything!   Email me, or be creative and send a postcard! I want to hear from the vacuum! Links
  • Overview

NOTICE: This webpage and associated files is provided for reference only.  This is not a kit site!  It is a collection of my work here at the University of Toronto in the Physics department. If you are considering using any schematics, designs, or anything else from here then be warned that you had better know something of what you are about to do.  No design is guaranteed in any way, including workable schematic, board layout, HDL code, embedded software, user software, component selection, documentation, webpages, or anything.

All that said, if it says here it works then for me it worked. To make the project work may have involved undocumented additions, changes, deletions, tweaks, tunings, alterations, modifications, adjustments, waving of a wand while wearing a pointy black hat, appeals to electron deities and just plain doing whatever it takes to make the project work.


Started for Allison Lin and Zuoming Qian in Robin's lab.  Two pingpong balls serve as integrating shperes for PDs (photodiodes) on a pulse laser.  A a short intense pulse hits a target, the two spheres collect the reflected and transmitted energy, which bounces around inside the spheres until absorbed by the photodiodes.  Measured power was 4W per PD for about 50uS.  Check the photos of bare PDs with the big #2 amplifier running.

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