reflector Comparison Table

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reflector comparison table

Subject has reference has purpose has latitude is an instance of has focal ratio has location has altitude has mounting manufacturer has owner has mirror maker has acronym has temperature has primary mirror shape has mirror type has number of segment has primary mirror diameter has aperture has optical design is a kind of has comment has creation date has operator has mount has longitude has synonym has secondary mirror shape has definition

2.3-meter Telescope astroweb observe celestial objects 12° 35' N Horseshoe equatorial telescope f/3.25, 13, 43 Kavalur, Tamil Nadu, India 725 m Walchandnagar Industries Vainu Bappu Observatory Indian Inst. Astrophys. ambient Zerodur 2.33 m 1985 Horseshoe equatorial 78° 50' E Vainu Bappu 2.3 m

Anglo-Australian Telescope astroweb observe celestial objects 31° 17' S Horseshoe equatorial telescope t/3.3. 8, 15. 36 Siding Spring Mtn., Australia 1149 m Mitsubishi Anglo-Australian Observatory Grubb-Parsons AAT ambient Cer-Vit 3.893 m 1975 Horseshoe equatorial 149° 04' E

Astrophysical Research Consortium Telescope astroweb observe celestial objects 32° 47' N altazimuth telescope f/1.75 New Mexico, US 2800 m the person, company or institution that constructed the mounting Apache Point R. Angel, B. Martin ambient spin-cast borosilicate honey-comb 3.5 m 1994 altazimuth 105° 49' W ARC 3.5 m

Byurakan 2.6-meter Reflector astroweb observe celestial objects 40° 20' N Fork equatorial telescope f/3.6, 16, 40 Mount Aragatz, Armenia 1500 m LOMO Byurakan Observatory the person, company or institution that created the mirror ambient material and other engineering details 2.64 m 1976 equatorial fork 44° 18' E Byurakan 102 inch

Canada-France-Hawaii Telescope astroweb observe celestial objects 19° 49' N Horseshoe equatorial telescope f/3.8, 8, 20, 35 Mauna Kea, Hawaii, US 4200 m SNACRP Canada-France-Hawaii Telescope Corp. Dominion Astrophys. Obs. CFHT ambient Cer-Vit 3.58 m 1979 Horseshoe equatorial 155° 28' W

Cassegrain observe celestial objects the person, company or institution that created the mirror concave paraboloid material and other engineering details or primary mirror diameter Cassegrain reflector convex hyperboloid Telescope devised by Cassegrain in which an auxiliary convex mirror reflects the magnified image, upside down, through a hole in the center of the main objective mirror - i.e., through the end of the telescope itself. It was, however, no improvement on the gregorian telescope invented probably slightly earlier.

ESO 3.6-meter Telescope astroweb observe celestial objects 29° 16' S Horseshoe equatorial telescope f/3.0, 8.1, 32 La Silla, Chile 2387 m Creusot-Loire European Southern Observatory REOSC ambient Fused-silica 3.57 m 1977 Horseshoe equatorial 70° 44' W ESO 3.6 m

Gregorian observe celestial objects the person, company or institution that created the mirror material and other engineering details or primary mirror diameter reflector concave 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.

Hobby-Eberly Telescope astroweb spectroscopic survey telescope 30° 41' N altazimuth telescope (f/1.4) f/4.7 Mount Fowlkes, Texas, US 2002 m the person, company or institution that constructed the mounting University of Texas Univ. of Texas, Penn. State ambient material and other engineering details 9.2 m equivalent Spherical figure A project of five universities in US and Germany; 91 spherical mirrors with combined focus for spectroscopy 1997 altazimuth fixed in altitude but rotates in azimuth 104° 01' W

Isaac Newton Telescope astroweb observe celestial objects 28° 46' N Polar-disk equatorial telescope f/3, 15 La Palma, Canary Islands 2336 m Grubb-Parsons Obs. del Roque de Ins Muchachos Grubb-Parsons ambient material and other engineering details 2.5 m mirror originally set up in England in 1967 1984 Royal Greenwich Observatory equatorial with polar-disk 17° 53' W Isaac Newton 98 inch

Magellan Project astroweb observe celestial objects 29° 00' S altazimuth telescope f/1.25, 11, 15 Las Campanas, Chile 2300 m L & F Industries Las Campanes Observatory R. Angel, B. Martin ambient material and other engineering details 6.5 m Cassegrain and Gregorian a twin, Magellan II is to be built in 2001 (1999) Carnegie Institution of Washington altazimuth 70° 42' W Magellan I

Maksutov telescope observe celestial objects the person, company or institution that created the mirror concave spheroid material and other engineering details or primary mirror diameter reflector A reflector whose primary mirror is spheroidal instead of parabolic. The light initially passes through a large concave lens to remove the spherical aberration.

MMT Telescope astroweb observe celestial objects 31° 41' N altazimuth telescope f/1.25, 5.4, 9, 15 Mount Hopkins, Arizona, US 2608 m de Bartolomeis MMT Observatory R. Angel, B. Martin ambient Spin-cast borosilicate honey-comb 6.5 m (1999) Smithsonian Institution and Univ. of Arizona altazimuth 110° 53' W

Mount Stromlo 2.3-meter astroweb observe celestial objects 31 ° 16' S altazimuth telescope f/2.09, 18 Siding Spring Mtn., Australia 1149 m Australian National Univ., Newcastle Dockyard Mt. Stromlo and Siding Spring Obs. Norman Cole ambient Cer-Vit 2.3 m 1984 altazimuth 149° 03' E

Newtonian observe celestial objects the person, company or institution that created the mirror concave paraboloidal material and other engineering details or primary mirror diameter reflector plane A class of reflecting telescope developed by Sir Issac Newton with a paraboloidal primary mirror and a small, plane secondary mirror at 45°; to deflect the focus of the primary to a position outside the tube near the top of the telescope.

reflector with corrector plate astroweb observe celestial objects the person, company or institution that created the mirror material and other engineering details or primary mirror diameter optical telescope

Ritchey-Chrétien observe celestial objects the person, company or institution that created the mirror concave hyperboloid material and other engineering details or primary mirror diameter Ritchey-Chrétien reflector convex hyperboloid A system of two mirrors, aspherized to give an image at the secondary (Cassegrain) focus free from spherical aberration and coma.

Schmidt observe celestial objects in degrees, minutes, seconds (N or S) height above sea level in meters the person, company or institution that constructed the mounting the person, company or institution that created the mirror ambient concave spheroid material and other engineering details or primary mirror diameter Schmidt equatorial telescope equatorial in degrees, minutes, seconds (E or W) none A type of reflecting telescope (more accurately, a large camera) in which the coma produced by a spherical concave mirror is compensated for by a thin correcting lens placed at the opening of the telescope tube. The Schmidt has a usable field of 0^°.6.

segmented mirror telescope observe celestial objects the person, company or institution that created the mirror material and other engineering details or primary mirror diameter reflector a reflecting telescope whose mirror is composed of multiple segments

Shajn 2.6-m Reflector astroweb observe celestial objects 44° 44' N Fork equatorial telescope f/3.8, 15.7, 16.4, 40 Nauchny, Ukraine height above sea level in meters the person, company or institution that constructed the mounting Crimean Astrophysical Obs. the person, company or institution that created the mirror ambient material and other engineering details 2.64 m 1960 equatorial fork 34° 00' E Crimean 102 inch

Southern African Large Telescope astroweb observe celestial objects 32° 23' S altazimuth telescope (f/1.4) f/4.7 Sutherland, South Africa 1798 m the person, company or institution that constructed the mounting South African Astronomical Obs. the person, company or institution that created the mirror SALT ambient material and other engineering details 9.1 m Spherical figure A twin of the Hobby-Eberly Telescope (2004) altazimuth fixed in altitude but rotates in azimuth 20° 49'E

William Herschel Telescope astroweb observe celestial objects 28° 46' N altazimuth telescope 02.5, 11 La Palma, Canary Islands 2332 m Grubb-Parsons Obs. del Roque de los Muchachos Grubb-Parsons WHT ambient Owens-Illinois Cer-Vit 4.2 m 1987 Royal Greenwich Observatory altazimuth 17° 53' W

Wisconsin-Indiana-Yale-NOAO Telescope astroweb observe celestial objects 31° 57' N altazimuth telescope (f/1.75) f/6.3 Kitt Peak, Arizona. US 2089 m L & F Industries WIYN Observatory Charles Harmer/NOAO ambient spin-cast borosilicate honey-comb 3.5 m mirror by Steward Observatory Mirror Lab (R. Angel) 1994 altazimuth 111° 36' W WIYN 3.5 m

Next electromagnetic telescope: space telescope Up: electromagnetic telescope Previous electromagnetic telescope: radio telescope

Subject	has reference	has purpose	has latitude	is an instance of	has focal ratio	has location	has altitude	has mounting manufacturer	has owner	has mirror maker	has acronym	has temperature	has primary mirror shape	has mirror type	has number of segment	has primary mirror diameter	has aperture	has optical design	is a kind of	has comment	has creation date	has operator	has mount	has longitude	has synonym	has secondary mirror shape	has definition
2.3-meter Telescope	astroweb	observe celestial objects	12° 35' N	Horseshoe equatorial telescope	f/3.25, 13, 43	Kavalur, Tamil Nadu, India	725 m	Walchandnagar Industries	Vainu Bappu Observatory	Indian Inst. Astrophys.		ambient		Zerodur			2.33 m				1985		Horseshoe equatorial	78° 50' E	Vainu Bappu 2.3 m
Anglo-Australian Telescope	astroweb	observe celestial objects	31° 17' S	Horseshoe equatorial telescope	t/3.3. 8, 15. 36	Siding Spring Mtn., Australia	1149 m	Mitsubishi	Anglo-Australian Observatory	Grubb-Parsons	AAT	ambient		Cer-Vit			3.893 m				1975		Horseshoe equatorial	149° 04' E
Astrophysical Research Consortium Telescope	astroweb	observe celestial objects	32° 47' N	altazimuth telescope	f/1.75	New Mexico, US	2800 m	the person, company or institution that constructed the mounting	Apache Point	R. Angel, B. Martin		ambient		spin-cast borosilicate honey-comb			3.5 m				1994		altazimuth	105° 49' W	ARC 3.5 m
Byurakan 2.6-meter Reflector	astroweb	observe celestial objects	40° 20' N	Fork equatorial telescope	f/3.6, 16, 40	Mount Aragatz, Armenia	1500 m	LOMO	Byurakan Observatory	the person, company or institution that created the mirror		ambient		material and other engineering details			2.64 m				1976		equatorial fork	44° 18' E	Byurakan 102 inch
Canada-France-Hawaii Telescope	astroweb	observe celestial objects	19° 49' N	Horseshoe equatorial telescope	f/3.8, 8, 20, 35	Mauna Kea, Hawaii, US	4200 m	SNACRP	Canada-France-Hawaii Telescope Corp.	Dominion Astrophys. Obs.	CFHT	ambient		Cer-Vit			3.58 m				1979		Horseshoe equatorial	155° 28' W
Cassegrain		observe celestial objects								the person, company or institution that created the mirror			concave paraboloid	material and other engineering details			or primary mirror diameter	Cassegrain	reflector							convex hyperboloid	Telescope devised by Cassegrain in which an auxiliary convex mirror reflects the magnified image, upside down, through a hole in the center of the main objective mirror - i.e., through the end of the telescope itself. It was, however, no improvement on the gregorian telescope invented probably slightly earlier.
ESO 3.6-meter Telescope	astroweb	observe celestial objects	29° 16' S	Horseshoe equatorial telescope	f/3.0, 8.1, 32	La Silla, Chile	2387 m	Creusot-Loire	European Southern Observatory	REOSC		ambient		Fused-silica			3.57 m				1977		Horseshoe equatorial	70° 44' W	ESO 3.6 m
Gregorian		observe celestial objects								the person, company or institution that created the mirror				material and other engineering details			or primary mirror diameter		reflector							concave	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.
Hobby-Eberly Telescope	astroweb	spectroscopic survey telescope	30° 41' N	altazimuth telescope	(f/1.4) f/4.7	Mount Fowlkes, Texas, US	2002 m	the person, company or institution that constructed the mounting	University of Texas	Univ. of Texas, Penn. State		ambient		material and other engineering details			9.2 m equivalent	Spherical figure		A project of five universities in US and Germany; 91 spherical mirrors with combined focus for spectroscopy	1997		altazimuth fixed in altitude but rotates in azimuth	104° 01' W
Isaac Newton Telescope	astroweb	observe celestial objects	28° 46' N	Polar-disk equatorial telescope	f/3, 15	La Palma, Canary Islands	2336 m	Grubb-Parsons	Obs. del Roque de Ins Muchachos	Grubb-Parsons		ambient		material and other engineering details			2.5 m mirror			originally set up in England in 1967	1984	Royal Greenwich Observatory	equatorial with polar-disk	17° 53' W	Isaac Newton 98 inch
Magellan Project	astroweb	observe celestial objects	29° 00' S	altazimuth telescope	f/1.25, 11, 15	Las Campanas, Chile	2300 m	L & F Industries	Las Campanes Observatory	R. Angel, B. Martin		ambient		material and other engineering details			6.5 m	Cassegrain and Gregorian		a twin, Magellan II is to be built in 2001	(1999)	Carnegie Institution of Washington	altazimuth	70° 42' W	Magellan I
Maksutov telescope		observe celestial objects								the person, company or institution that created the mirror			concave spheroid	material and other engineering details			or primary mirror diameter		reflector								A reflector whose primary mirror is spheroidal instead of parabolic. The light initially passes through a large concave lens to remove the spherical aberration.
MMT Telescope	astroweb	observe celestial objects	31° 41' N	altazimuth telescope	f/1.25, 5.4, 9, 15	Mount Hopkins, Arizona, US	2608 m	de Bartolomeis	MMT Observatory	R. Angel, B. Martin		ambient		Spin-cast borosilicate honey-comb			6.5 m				(1999)	Smithsonian Institution and Univ. of Arizona	altazimuth	110° 53' W
Mount Stromlo 2.3-meter	astroweb	observe celestial objects	31 ° 16' S	altazimuth telescope	f/2.09, 18	Siding Spring Mtn., Australia	1149 m	Australian National Univ., Newcastle Dockyard	Mt. Stromlo and Siding Spring Obs.	Norman Cole		ambient		Cer-Vit			2.3 m				1984		altazimuth	149° 03' E
Newtonian		observe celestial objects								the person, company or institution that created the mirror			concave paraboloidal	material and other engineering details			or primary mirror diameter		reflector							plane	A class of reflecting telescope developed by Sir Issac Newton with a paraboloidal primary mirror and a small, plane secondary mirror at 45°; to deflect the focus of the primary to a position outside the tube near the top of the telescope.
reflector with corrector plate	astroweb	observe celestial objects								the person, company or institution that created the mirror				material and other engineering details			or primary mirror diameter		optical telescope
Ritchey-Chrétien		observe celestial objects								the person, company or institution that created the mirror			concave hyperboloid	material and other engineering details			or primary mirror diameter	Ritchey-Chrétien	reflector							convex hyperboloid	A system of two mirrors, aspherized to give an image at the secondary (Cassegrain) focus free from spherical aberration and coma.
Schmidt		observe celestial objects	in degrees, minutes, seconds (N or S)				height above sea level in meters	the person, company or institution that constructed the mounting		the person, company or institution that created the mirror		ambient	concave spheroid	material and other engineering details			or primary mirror diameter	Schmidt	equatorial telescope				equatorial	in degrees, minutes, seconds (E or W)		none	A type of reflecting telescope (more accurately, a large camera) in which the coma produced by a spherical concave mirror is compensated for by a thin correcting lens placed at the opening of the telescope tube. The Schmidt has a usable field of 0^°.6.
segmented mirror telescope		observe celestial objects								the person, company or institution that created the mirror				material and other engineering details			or primary mirror diameter		reflector								a reflecting telescope whose mirror is composed of multiple segments
Shajn 2.6-m Reflector	astroweb	observe celestial objects	44° 44' N	Fork equatorial telescope	f/3.8, 15.7, 16.4, 40	Nauchny, Ukraine	height above sea level in meters	the person, company or institution that constructed the mounting	Crimean Astrophysical Obs.	the person, company or institution that created the mirror		ambient		material and other engineering details			2.64 m				1960		equatorial fork	34° 00' E	Crimean 102 inch
Southern African Large Telescope	astroweb	observe celestial objects	32° 23' S	altazimuth telescope	(f/1.4) f/4.7	Sutherland, South Africa	1798 m	the person, company or institution that constructed the mounting	South African Astronomical Obs.	the person, company or institution that created the mirror	SALT	ambient		material and other engineering details			9.1 m	Spherical figure		A twin of the Hobby-Eberly Telescope	(2004)		altazimuth fixed in altitude but rotates in azimuth	20° 49'E
William Herschel Telescope	astroweb	observe celestial objects	28° 46' N	altazimuth telescope	02.5, 11	La Palma, Canary Islands	2332 m	Grubb-Parsons	Obs. del Roque de los Muchachos	Grubb-Parsons	WHT	ambient		Owens-Illinois Cer-Vit			4.2 m				1987	Royal Greenwich Observatory	altazimuth	17° 53' W
Wisconsin-Indiana-Yale-NOAO Telescope	astroweb	observe celestial objects	31° 57' N	altazimuth telescope	(f/1.75) f/6.3	Kitt Peak, Arizona. US	2089 m	L & F Industries	WIYN Observatory	Charles Harmer/NOAO		ambient		spin-cast borosilicate honey-comb			3.5 m			mirror by Steward Observatory Mirror Lab (R. Angel)	1994		altazimuth	111° 36' W	WIYN 3.5 m