title: Design and performance estimate of a focal reducer for the 2.3 m Thai National Telescope.
abstract: We have designed a new kind of focal reducer for the 2.3 m Thai National Telescope (TNT) to image the TNT specified FOV Δθ = 14.6' with an angular resolution α ≈1.2 arcsec. This, at a minimum cost by using common glasses, spherical surfaces and by requiring comfortable mechanical tolerance. This focal reducer comprises 1 lens placed at the level of the fork entrance and 1 lens placed in front of the detector. In this paper, we present the focal reducer paraxial model, we describe the optical design and we present the performance.
authors.forename: Christophe
authors.initials: C
authors.lastname: Buisset
authors.forename: Alexis
authors.initials: A
authors.lastname: Deboos
authors.forename: Thierry
authors.initials: T
authors.lastname: Lépine
authors.forename: Saran
authors.initials: S
authors.lastname: Poshyachinda
authors.forename: Boonrucksar
authors.initials: B
authors.lastname: Soonthornthum