refracting telescope


  • WordNet 3.6
    • n refracting telescope optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
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Webster's Revised Unabridged Dictionary
  • Interesting fact: The telescope at the Lick Observatory on Mount Hamilton, in California, also serves as a tomb. The 36-inch refracting telescope is mounted on a pillar that contains the remains of Jack Lick, who died in 1876. Lick was a wealthy financier and philanthropist who financed the construction of the observatory that bears his name.
    • Refracting telescope a telescope in which the image is formed by refraction through an object glass.
    • Refracting telescope (Opt) See under Telescope.
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In literature:

It may be added that Thomas Cooke revived the art of making refracting telescopes in England.
"Men of Invention and Industry" by Samuel Smiles
For this reason he invented a telescope, which discovers objects by reflection, and not by refraction.
"Letters on England" by Voltaire
We have thus far spoken only of the refracting telescope, because it is the kind with which an observer would naturally seek to supply himself.
"Side-lights on Astronomy and Kindred Fields of Popular Science" by Simon Newcomb
An achromatic refracting telescope, of three and a half feet, and triple object glass, made by Mr Dollond.
"A General History and Collection of Voyages and Travels, Volume 14" by Robert Kerr
For nearly one hundred and fifty years all refracting telescopes labored under one serious difficulty.
"Scientific American Supplement, No. 832, December 12, 1891" by Various
This is the grand principle of the refracting telescope.
"Recreations in Astronomy" by Henry Warren
Meanwhile the production of refracting telescopes made but slow progress.
"Notable Events of the Nineteenth Century" by Various
A man may look through a telescope before he can define the refraction or reflection of light.
"The Wesleyan Methodist Pulpit in Malvern Sermons Preached at the Opening Services of the Wesleyan Methodist Chapel, in 1866" by Knowles King
Here, with no refraction, a small telescope can do as well as the best that your people have made.
"Hunters Out of Space" by Joseph Everidge Kelleam
Greenwich time on February 17th, 1897, through a powerful refracting telescope.
"The Story of the Heavens" by Robert Stawell Ball

In news:

As the Web site Tactical & Rescue Gear puts it, the device "uses a modified reversed refracting telescope design with high quality glass multi-coated optical lenses and BAK-4 glass paired prism.".
Early telescopes such as Galileo's were designed to use the principles of refraction, or the bending of light rays as they pass from one medium, such as air, into and out of another medium, such as glass.

In science:

The OPT is a NRAO-designed refracting telescope composed of a 4 inch lens mounted within a rolled-Invar tube (Mangum (2004)).
Evaluation of the ALMA Prototype Antennas
This telescope uses no reflective nor refractive devices (no mirrors, no lenses) as entrance pupil, but instead an interferometric array, involving hundreds thousands of ”basic” subapertures, i.e., mere holes punched in a large and thin opaque foil.
Fresnel Interferometric Imager: ground-based prototype
The beam is then expanded to a 5 cm beam using a refractive telescope. A refractive design was chosen because changes in the optical path are relatively insensitive to changes in the position and orientation of the optical elements.
Science, Technology and Mission Design for the Laser Astrometric Test Of Relativity
This main optical element may be a reflecting telescope with a single parabolic mirror, or one with two or more mirrors; it may be a refracting telescope using dielectric lenses; it may be an array of mirrors configured as an interferometer; it may be just a horn antenna 2 .
The Cosmic Microwave Background for Pedestrians: A Review for Particle and Nuclear Physicists
In real life, optical aberrations in the beam change with time because of the instability of telescope optics, the changing refractive index of the air in the dome, and seeing.
Donut: measuring optical aberrations from a single extra-focal image