Ritchey-Chrétien Reflector

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Ritchey-Chrétien Reflector

 

a type of reflecting telescope. In this system, the parallel beams of light from stars strike a primary concave hyperbolic mirror, are reflected to a secondary convex hyperbolic mirror, and are focused below the secondary mirror forming the image. Spherical aberrations and coma are corrected in a Ritchey-Chrétien reflector system, and the field of view may reach 0.5–1°. Special corrector lenses are used to correct astigmatism and increase the field of view to 2°.

The system was proposed by the French optician H. Chrétien in 1922 and first constructed by the American astronomer G. Ritchey in 1928. It came into wide use in the second half of the 20th century.

References in periodicals archive ?
Details: Deep Sky Instruments RC10C Ritchey-Chretien reflector with Finger Lakes Instrumentation ML11002 CCD camera.
Deep Sky Instruments recently unveiled its new RC-14C ($15,495), a 14 1/4-inch Ritchey-Chretien reflector.
Far from city lights and at an elevation of 4,000 feet, Rodeo was an ideal location for Cullen to build a personal observatory for his 24-inch Ritchey-Chretien reflector.
DETAILS: 16-inch Ritchey-Chretien reflector, SBIG STV CCD camera.
To capture such detail, Croman relies on a 14-inch RC Optical Systems Ritchey-Chretien reflector and an ST-10XME.
And so it was that Wendee Wallach-Levy, one of those citizens, was assigned May 22, 2003, for an all-night imaging session with the observatory's 20-inch Ritchey-Chretien reflector.
It occurred to me that the 2,900-mm focal length of my 12 1/2-inch f/9 Ritchey-Chretien reflector, which I routinely use to obtain close-up shots of small objects, is almost three-fourths the focal length of the Tautenberg telescope (4,000 mm).
A highlight for the hard-core scope enthusiasts was Georgia amateur astronomer Tim Puckett, who detailed the design and construction of his 24-inch (60-cm) f/8 Ritchey-Chretien reflector at his private observatory in Mountaintown, north of Atlanta.
RC Optical Systems 12 1/2-inch f/9 Ritchey-Chretien reflector on an Astro-Physics 1200 German equatorial mount, FLI "Dream Machine" CCD camera with SITe chip.
There are a 24-inch f/8 Ritchey-Chretien reflector with an SBIG ST-8 CCD camera; 22-inch and 17.
Ritchey-Chretien reflectors are highly regarded among today's elite astrophotographers, and premium instruments often carry price tags starting at about $1,000 per inch of aperture.