July 2013

Subscribe to Syndicate

Scattered Light in Telescope

I've begun to investigate scattered light in the telescope in the imaging train by following the work of Grundahl and Sorensen (Astron. Astrophys. suppl. ser. 116, 367-371, 1996).

Here are three images taken with a camera obscura (~0.5mm pinhole mask in front of the CCD camera) of a flat screen. The pinhole mask was placed in an empty slot of the CCD camera filter wheel. All exposures are 5 seconds. Images were not calibrated. The images are log-scaled to make the light scatter more obvious.


Component Tool Size

Filter wheel access