Gregorian Comparison Table

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Gregorian comparison table

Subject has secondary mirror shape is a kind of has definition

reflector electromagnetic telescope A device for gathering and amplifying light or other energy by means of a mirror.

Gregorian concave reflector Telescope devised - but never constructed - by James Gregory, in which an auxiliary concave mirror reflects the magnified image, the right way up, through a hole in the centre of the main objective mirror, i.e., through the end of the telescope itself. The Cassegrain telescope is similar but produces an inverted image.

Subject	has secondary mirror shape	is a kind of	has definition
reflector		electromagnetic telescope	A device for gathering and amplifying light or other energy by means of a mirror.
Gregorian	concave	reflector	Telescope devised - but never constructed - by James Gregory, in which an auxiliary concave mirror reflects the magnified image, the right way up, through a hole in the centre of the main objective mirror, i.e., through the end of the telescope itself. The Cassegrain telescope is similar but produces an inverted image.

Next reflector: Hobby-Eberly Telescope Up: reflector Previous reflector: ESO 3.6-meter Telescope