- May 26, 2009
Are you sure it's PCBS? When I was playing with this element it looked rather like a dichroic cube beamsplitter. BTW here's a picture of the PHR pickup with description of the elements: http://repairfaq.cis.upenn.edu/Misc/phr803ta.jpg This is what I fugured out about that optics, if there's something wrong please let me know.
If you can, do this test with a BR, and you will see what i mean ..... take the cube and a BR in an aixiz or other module and get a straight beam from the module, then shine the beam through the face that is normally used as BR input, and look the opposite face (the sanded one) ..... now, slowly rotate the module ..... you will see that in one position, there's the maximum reflection (almost all the beam come out from the left face at 90 degrees, and almost no light is transferred to the sanded face), and continuing to rotate the module, you will see that the spot on the sanded face increase it's intensity, while the light transferred to the output face decrease ..... this means that the cube is a PBS, otherwise, for common beam splitters, there's no variations in the intensities rotating the module.