Light scattered from polished optical surfaces: Wings of the point spread function

Details Light scattered from polished optical surfaces: Wings of the point spread function Light scattered from polished optical surfaces: Wings of the point spread function

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2350..222k&link_type=abstract

In NASA. Ames Research Center Proc. of the Workshop on Improvements to Photometry p 222-242 (SEE N85-17892 08-89)

Astronomy and Astrophysics

Astronomy

Aberration, Astronomical Photometry, Light Scattering, Mirrors, Point Spread Functions, Telescopes, Computerized Simulation, Dust, Errors, Estimating, Focal Plane Devices, Markov Chains, Misalignment, Polishing, Random Walk, Surface Roughness

Scientific paper

Random figure errors from the polishing process plus particles on the main mirrors in a telescope cause an extended point spread function (PSF) declining approximately as the inverse square of the sine of the angle from a star from about 100 micro-rad to a right angle. The decline in at least one case, and probably in general, proceeds as the inverse cube at smaller angles where the usual focal plane aperture radius is chosen. The photometric error due to misalignment by one Airy ring spacing with an aperture of n rings depends on the net variance in the figure. It is approximately 60/(n+1)(3) when using the data of Kormendy (1973). A typical value is 6 x 10 to the -5th power per ring of misalignment with n = 100 rings. The encircled power may be modulated on a time scale of hours by parts per thousand in a wavelength dependent manner due to relative humidity effects on mirror dust. The scattering according to an inverse power law is due to a random walk in aberration height caused by a multitude of facets and slope errors left by the polishing process. A deviation from such a law at grazing emergence may permit monitoring the dust effects.

Affiliated with

Also associated with

No associations

Rating

Light scattered from polished optical surfaces: Wings of the point spread function does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Light scattered from polished optical surfaces: Wings of the point spread function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light scattered from polished optical surfaces: Wings of the point spread function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1756096