A wide-field corrector at the prime focus of a Ritchey-Chrétien telescope
2004; Pleiades Publishing; Volume: 30; Issue: 3 Linguagem: Inglês
10.1134/1.1667867
ISSN1562-6873
Autores Tópico(s)Astronomy and Astrophysical Research
ResumoWe propose a form of a lens corrector at the prime focus of a hyperboloidal mirror that provides a flat field of view up to 3° in diameter at image quality D 80<0.8 arcsec in integrated (0.32–1.1 µm) light. The corrector consists of five lenses made of fused silica. All lens surfaces are spherical in shape, so the system is capable of achieving better images, if necessary, by aspherizing the surfaces. The optical system of the corrector is stable in the sense that its principal features are retained when optimized after significant perturbations of its parameters. As an example, we calculated three versions of the corrector for the Blanco 4-m telescope at Cerro Tololo Inter-American Observatory with $$2\mathop .\limits^ \circ 12$$ , $$2\mathop .\limits^ \circ 4$$ and $$3\mathop .\limits^ \circ 0$$ fields of view.
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