ABSTRACT: An autostigmatic microscope is a perfect way of aligning an autocollimating flat mirror to a parabola. This notes descibes the simple two step process of positioning the PSM objective focus coincident with the focus of the parabola.
ABSTRACT: It is sometimes necessary to align a series of optical elements, lenses and mirrors, to a single, straight optical axis. This note describes a method using an autostigmatic microscope (ASM) where the ASM is moved along a straight line relative to the axis of the bench in which the elelemts are mounted so the centers of curvature of the elements can be adjusted to lie on the line or axis of the system.
ABSTRACT: We describe a method of finding the optical axis of an aspheric surface by looking at an annulus of the surface as the surface is rotated in azimuth. The method uses either an autostigmatic microscope or an interferometer to view the annulus. Distinctive features of the reflected spot movement, or the changes in Zernike coefficients found with interferometry while the surface is rotated in azimuth permits the separation of decenter from tilt. The method appears to be suitable for use with any aspheric surface.
"Just wanted to share a recent success aligning an adaptive optics test bed with the PSM. We used to use a traditional alignment telescope in the past, but the PSM made the whole process really easy and fast. The main requirements were to quickly determine the quality of beam collimation and pupil conjugates since there are several beam expanders and compressors with multiple pupil and focal planes."
Suresh Sivanandam Dunlap Institute for Astronomy and Astrophysics University of Toronto
"You are always responsive and give us lots of useful information!!"
Dr. Shaojie Chen Dunlap Institute for Astronomy and Astrophysics University of Toronto
"As always we are very much loving the instrument, I personally love the camera upgrade from what I'm used to!"