Thursday, May 17, 2012

The Sun Viewed Through Crossed Polarizers

 
The Sun is so bright that one needs reduce it illuminance by a filter of some sort. A simple one can be formed by crossed polarizers for which the optical density is a maximum. The polarizers used below are from a Polarizer Pak that I got a few years ago from scientificsonline.com. They don't seem to be available any more.
 
 
One can look at the Sun through them be it is still a little too bright. To capture an image of the Sun one needs to use the minimum manual exposure setting available (f/8 at 1/2000 sec. with ISO 64). The image below is reduced in brightness and contrast enhanced. The quality is reduced by the small aperture but one can just make out the sunspot clusters.
 
 
Getting the manual focus right can be quite challenging.
 

1 comment:

Isabel Carr said...

Hi,
nice article & I would like to inform that RMI Optics is a manufacturer of Polarizers