Basically, the catadioptric telescope is just one of the 3 main types of the optical telescopes.The other 2 main types of optical telescopes are the refracting telescopes and the reflecting telescopes.

George Forbes Alexander has written:

'Ocular dioptrics and lenses' -- subject(s): Accommodation and refraction, Eye, Lenses

The Nobel Prize in Physiology or Medicine 1911 was awarded to Allvar Gullstrand for his work on the dioptrics of the eye.

Descartes explains the logic behind the laws of reflection he discovered in his work "Dioptrics". He uses the idea of a tennis ball bouncing at an angle of the ground and up through a sheet to formulate the laws of reflection on a geometric plane.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern D--P-R-C-. That is, nine letter words with 1st letter D and 4th letter P and 6th letter R and 8th letter C. In alphabetical order, they are:

dioptrics

dumptruck