by jrburns47 » Sun Aug 04, 2019 8:39 am
I’m no expert on reflections but I would think, if it’s a Denisyuk, that, since diffuse objects tend to scatter & change the polarization anyway, the answer would be no negative effect. Even if the filter does change the polarization, it’s the same basic polarized or randomly polarized diverged beam going through and reflecting/scattering back through the emulsion in the reflected direction and, I would think, some portion of the beam will remain in phase... Separately, you can always use a known orientation polarizing filter in a rotation mount to observe the polarization change/effect of a diverged beam passing through the polarizing filter with and without the apodizing filter inserted in the beam path. If the apodizing filter is a glass/film sandwich instead of directly on the glass of the filter, if the film base is polyester instead of triacetate, it will be birefringent and cause polarization problems easily seen with the aforementioned polarizing filter test. Please post results of your interesting testing!
I’m no expert on reflections but I would think, if it’s a Denisyuk, that, since diffuse objects tend to scatter & change the polarization anyway, the answer would be no negative effect. Even if the filter does change the polarization, it’s the same basic polarized or randomly polarized diverged beam going through and reflecting/scattering back through the emulsion in the reflected direction and, I would think, some portion of the beam will remain in phase... Separately, you can always use a known orientation polarizing filter in a rotation mount to observe the polarization change/effect of a diverged beam passing through the polarizing filter with and without the apodizing filter inserted in the beam path. If the apodizing filter is a glass/film sandwich instead of directly on the glass of the filter, if the film base is polyester instead of triacetate, it will be birefringent and cause polarization problems easily seen with the aforementioned polarizing filter test. Please post results of your interesting testing!