P3D Polarizer comment

[Bob_Maxey@xxxxxxxxxxxx]

>>I'm attempting to get an intuitive feel for "circular polarization".
>>Standard (linear?) polarization is reasonably easy to follow if one
>>thinks of the "pocket fence" model - where light waves (let's call 'em
>>waves) pass thru vibrating either horizonally or vertically. Thus
>>you can block/pass them with another "polarizer" which is also aligned
>>either vertically or horizontally as appropriate.

Circular polarizers convert unpolarized light to circularly polarized
light.
This is done using a retarder, axis oriented at a 45 degree angle with
respect
to the polarizer axis. Light passes through the composite, is converted to
circularly polarized light. After reflection, it passes through the
retarder again.
This rotates the polarization plane 90 degrees, and is blocked by the
linear polarizer.

RM



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End of PHOTO-3D Digest 3425
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