catadioptric

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catadioptric

[‚kad·ə‚dī′äp·trik]
(optics)
Involving both reflection and refraction of light.
References in periodicals archive ?
Most catadioptrics today are sold with computer-driven tracking motors, commonly called "Go To" mounts because they can literally go to your selected object with the push of a button.
If that describes you, consider a catadioptric telescope such as a Schmidt-Cassegrain.
George Ritchey and Henri Chretien did not invent a catadioptric telescope incorporating both mirrors and lenses.
The disparity is not huge; depending on your application and the particular scopes in question, a 4-inch refractor might be roughly equivalent to a 5- or 6-inch reflector or catadioptric. However, devotees of fine apochromats also claim that their images have a crystalline clarity and perfection that is beyond price.
Refractors, reflectors, and catadioptric (compound) telescopes do their jobs in different ways (see page 80).
Catadioptrics were born from a wish to marry the desirable characteristics of refractors and reflectors.What results from this union of mirror and lens is a sealed optical tube assembly that lends itself to a variety of observational and photographic needs but is a compromise between performance and portability.
In common with refractors, the tubes of catadioptrics are sealed so that dirt and dust are largely excluded--a big plus for an instrument that you're going to take out into the country.
(823 Reamer Ave., Greensburg, PA 15601.) I'm especially curious about how catadioptrics, fast Newtonians, and 3-inch refractors do on this star.
All sorts of hardware items are on display, from the latest computer-controlled catadioptrics to astronomical jewelry.
To so encumber one of today's compact catadioptrics would make it quite wobbly and unmanageable.
These refractors are not cheap, and for the same money you could buy a reflector or catadioptric that would always show fainter objects and would often show finer planetary detail as well.
For example, you may find a large-aperture Dobsonian from one manufacturer for the same price as a small-aperture computerized catadioptric from another.