A solar focus and seeing monitor is described which utilizes the properties of an image of the telescope objective formed after putting a knife edge next to the solar limb. In a very simple way simultaneous measurements are obtained for the telescope focus and for the image motion and blurring produced by the earth’s atmosphere.
© 1966 Optical Society of America
Original Manuscript: June 14, 1965
Published: February 1, 1966
J. M. Beckers, "A Photoelectric Focus and Seeing Monitor for Solar Telescopes," Appl. Opt. 5, 301-304 (1966)