Analytical expressions for field astigmatism in decentered two mirror telescopes and application to the collimation of the ESO VLT

Details Analytical expressions for field astigmatism in decentered two mirror telescopes and application to the collimation of the ESO VLT Analytical expressions for field astigmatism in decentered two mirror telescopes and application to the collimation of the ESO VLT

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..144..157n&link_type=abstract

Astronomy and Astrophysics Supplement, v.144, p.157-167

Astronomy and Astrophysics

Astrophysics

4

Telescopes

Scientific paper

We derive formulae for all parameters defining the field astigmatism of misaligned two mirror telescopes with arbitrary geometries and with stop positions anywhere on the line connecting the vertices of the two mirrors. The formulae show explicitly the dependence of the field astigmatism on the fundamental design parameters and characteristics of the telescope and on the stop position. Special attention is given to the particular case where such a schiefspiegler has been corrected for coma at the field center. In addition, we study the effects of the practical definition that the center of the field is the center of the adapter. Following a recent paper by McLeod, where the field dependence of astigmatism is used to collimate a Ritchey-Chretien telescope with the stop at the primary mirror, we apply our formulae to the Cassegrain focus of the ESO Very Large Telescope (VLT), where the stop is at the secondary mirror and the telescope is only corrected for spherical aberration. We present measurements of the field astigmatism and discuss the accuracy of the collimation method.

Affiliated with

Also associated with

No associations

Rating

Analytical expressions for field astigmatism in decentered two mirror telescopes and application to the collimation of the ESO VLT 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 Analytical expressions for field astigmatism in decentered two mirror telescopes and application to the collimation of the ESO VLT, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analytical expressions for field astigmatism in decentered two mirror telescopes and application to the collimation of the ESO VLT will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1122160