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en.wikipedia.org/wiki/Optical_telescope

An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of ... (catoptrics); catadioptric telescopes, which combine lenses and mirrors ... For reflecting telescopes, which use a curved mirror in place of the objective ... Many types of telescope fold or divert the optical path with secondary or ...

www.answers.com/Q/Telescope_that_uses_several_mirriors_to_combine_and_focus_light

A reflecting telescope forms an image by using a combination ofcurved mirrors to focus light. It was invented as an alternative tothe refracting telescope.

www.fortworthastro.com/beginner5.html

Apr 3, 2014 ... It uses a convex glass lens (to bend light and bring it into focus. ... Different wavelengths of light focus at different points within the lens (e.g. a prism ... A reflecting telescope uses a primary convex mirror which is curved to a ... The word catadioptric is derived by combining the term for an optical system that ...

science.howstuffworks.com/telescope1.htm

The reflector telescope, which uses mirrors instead of the lenses. ... of light from a distant object and brings that light, or image, to a point or focus. ... When you combine the objective lens or primary mirror with the eyepiece, you have a telescope. ... achieved by almost any telescope by using different eyepieces, aperture is a ...

lifeng.lamost.org/courses/astrotoday/CHAISSON/AT305/HTML/AT305EOC.HTM

Reflecting telescopes use a mirror to concentrate and focus the light. ... of problems, among them chromatic aberration, the tendency of lenses to focus different ...

www.livescience.com/48110-reflection-refraction.html

Oct 1, 2014 ... A mirror image is the result of light rays bounding off a reflective surface. ... corrected by using a combination of lenses, or in the case of large telescopes, ... Focus. In a lens with a curved surface, parallel rays bend at different ...

physics.stackexchange.com/questions/15391/a-telescope-with-a-bunch-of-small-mirrors

Oct 5, 2011 ... Combining many mirrors to behave as a single large mirror is ... would be like using a mirror that deviates from the ideal shape by many millimeters, over it's whole surface! This sort of thing would be fine for collecting light, and in fact similar .... If you don't need to create an image at focus, but just collect the ...

science.nasa.gov/science-news/science-at-nasa/1999/features/ast20apr99_1

Apr 20, 1999 ... Why we need different types of telescopes to look at outer space ... By using a curved mirror to reflect and focus the light inside the tube, he was ...

www.encyclopedia.com/science-and-technology/astronomy-and-space-exploration/astronomy-general/telescope

The more light a telescope can gather, the more distant the objects it can ... Catadioptric telescopes use a combination of lenses and mirrors in order to ... As a result, stars located close to the guide-star come into a focus, which is many times ..... is constructing a similar telescope that will combine light from four8.2-m mirrors ...