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Message ID: 252     Entry time: Sun Mar 6 02:13:28 2016
Author: Koji 
Type: Optics 
Category: Characterization 
Subject: PD glass reflections 

On friday, I removed a glass cover of a G30655 with a PD can cutter.

When a beam shoots a Perkin Elmer/Excelitas PD, we usually observe three reflections.
We always wonder what these are.

When the glass window is illuminated by a beam, I could see two reflections. So they are the front and rear reflection from the glass windows.

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