Ritchey Telescope Mirror Grinding Machine

Ritchey Mirror Grinding Machine National Air and Space Museum

George Willis Ritchey built this mirror grinding machine at the Yerkes Observatory in Williams Bay, Wisconsin, in the late 1890s. Under the sponsorship of George Ellery Hale, the machine was used to grind a series of telescope mirrors starting with a 24-inch and then a 60-inch mirror for a telescope initially intended for the Yerkes Observatory.


Ritchey Telescope Mirror Grinding Machine - YouTube

Excerpt from VHS video made at the Lick Observatory optical shops in Santa Cruz, CA before the object was acquired by the Smithsonian. Circa 1985.


Ritchey Telescope Mirror Grinding Machine - Caesar Mining

Repli ing Ritchey Mirror Grinding Machine Atm Optics. Mar 06 2006 Repli ing Ritchey Mirror grinding machine posted in ATM Optics and DIY Forum Ive just returned from a few days with friends in Washington DC Being aviators and aircraft builders we blew a whole day at the new Air Space Museums new annex at Dulles really caught my attention however was that they moved the Ritchey mirror


Grinding Machine for Large Telescope Mirrors

Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Mirror Grinding - Diamond Curve Generating Machine - YouTube

Panasonic HDC-SD60 Telescope mirror grinding machine - Duration: 2:36. zi6film 9,198 views. Ritchey Telescope Mirror Grinding Machine - Duration: 0:54. D Devorkin 9,292 views.


Mirror Grinding Machine

My Mirror Grinding Machine. For a long time I& 39;ve wanted to build a machine for grinding telescope mirrors. Dennis Rech& 39;s M-o-M designs finally inspired me to just get up and do it. Over the years, I& 39;d been collecting motors, gear boxes, pulleys, etc. Most of them came from industrial junk yards.


How to make RC mirror? - ATM, Optics and DIY Forum - Cloudy

Reason is because a Ritchey Chretien uses two hyperbolic surfaces and is a compli ed optical design. Spacing is critical. A Newtonian is much simpler in optical design and uses only one parabolic surface and a flat secondary mirror. There is actually plenty of information on how to make a Ritchey Chretien.


Making a homemade mirror grinding machine - ATM, Optics and

Making a homemade mirror grinding machine - posted in ATM, Optics and DIY Forum: I want to make a motorized mirror grinder , any good info on this , i have a couple geared motors , low speed high torque.


Dick Parker& 39;s Telescope Mirror Workshop: Cassegrain Telescope

Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.


www.jeffbaldwin.org

Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 PRM speeds vary , and a 75% tool is on top. They are already curve-generated. The tool is hanging over the mirror by 1/6 the diameter of the tool, or about 1/8 diameter of the mirror, and is fixed in this position.


Ritchey Telescope Mirror Grinding Machine - Caesar Mining

Repli ing Ritchey Mirror Grinding Machine Atm Optics. Mar 06 2006 Repli ing Ritchey Mirror grinding machine posted in ATM Optics and DIY Forum Ive just returned from a few days with friends in Washington DC Being aviators and aircraft builders we blew a whole day at the new Air Space Museums new annex at Dulles really caught my attention however was that they moved the Ritchey mirror


Grinding Machine for Large Telescope Mirrors

Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Mount Wilson Observatory Building the 100-inch Telescope

Everything was prepared for the arrival of the 9,000 pound slab of wine bottle glass. George Ritchey, Hale’s chief optician, began preliminary design work on the telescope for the estimation of costs, waiting until the 60-inch was tested before going into detail. The world’s largest grinding machine was built.


Mirror Grinding - Diamond Curve Generating Machine - YouTube

Panasonic HDC-SD60 Telescope mirror grinding machine - Duration: 2:36. zi6film 9,198 views. Ritchey Telescope Mirror Grinding Machine - Duration: 0:54. D Devorkin 9,292 views.


telescope mirror grinding machines - MC World

Grinding Machine for Large Telescope Mirrors. Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Mirror Grinding Machine

My Mirror Grinding Machine. For a long time I& 39;ve wanted to build a machine for grinding telescope mirrors. Dennis Rech& 39;s M-o-M designs finally inspired me to just get up and do it. Over the years, I& 39;d been collecting motors, gear boxes, pulleys, etc. Most of them came from industrial junk yards.


Joy of Mirror Making: Introduction - BBAstroDesigns

Stone tools go back 3.3 million years. Pounding, scraping, knapping, grinding combined with fire, heat, melting leads us today to grinding telescope mirrors from glass. Making a telescope mirror is one of the most satisfying and sublime joys you will experience. It& 39;s also arguably the most accurate surface made by man or machine. If the mirror


home made grinding machine homemade telescope mirror grinding

Grinding Machine for Large Telescope Mirrors 2017-8-9 · Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Dick Parker& 39;s Telescope Mirror Workshop: Cassegrain Telescope

Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.


www.jeffbaldwin.org

Fixed-post machine grinding is where the mirror is on a turntable rotating around 20 PRM speeds vary , and a 75% tool is on top. They are already curve-generated. The tool is hanging over the mirror by 1/6 the diameter of the tool, or about 1/8 diameter of the mirror, and is fixed in this position.


telescope mirror grinding machines - MC World

Grinding Machine for Large Telescope Mirrors. Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Cassegrain reflector - Wikipedia

The Ritchey-Chrétien is a specialized Cassegrain reflector which has two hyperbolic mirrors instead of a parabolic primary . It is free of coma and spherical aberration at a flat focal plane, making it well suited for wide field and photographic observations.


telescope mirror grinding machine - activwater

George Willis Ritchey built this mirror grinding machine at the , the machine was used to grind a series of telescope mirrors starting with a 24-inch and then a . Know More Diy Telescope Mirror Grinding Machine


Fixed post mirror grinder advice - DIY Astronomer

Basically there are two types of grinding/polishing machine. The ‘traditional’ type which involves the mirror rotating at a relatively slow speed, a few rpm for a big mirror 16-20 inches with the tool moving across the mirror, from side to side, at a higher rpm depending on the size of the mirror and/or tool.


telescope mirror grinding machine price in india

henery draper mirror grinding machine . on the construction of a silvered glass telescope on the construction of a silvered glass telescope henry draper on section written by george ritchey on the grinding draper mirror grinding machine electronic grinding mill Get Price the sbau forum sbau home page glass telescope fifteen and a half inches in aperture and its use


telescope mirror grinding machine price in india

telescope mirror grinding machine . This is a photo of a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank that has been lightened by casting the mirror in a mold that made lots of hexagon shaped pockets in the back of the mirror. Read More; Mirror Grinding Machine. telescope mirror grinding machine based on Dennis Rech& 39;s M o M 20.


home made grinding machine homemade telescope mirror grinding

Grinding Machine for Large Telescope Mirrors 2017-8-9 · Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Dick Parker& 39;s Telescope Mirror Workshop: Cassegrain Telescope

Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.


Document sans nom - Astrosurf

Elgin-Waineo machines : This is the most common type of machine at the moment, in industry as well as with amateurs, chiefly on the American continent see figure F . The main difference from the previous model lies in its single off-set arm 1 that oscillates around an axis 2 and is connected to a crank 4 and spindle 3 system which


Amateur Telescope Making Main Page - Stellafane

A lot has changed since Russell Porter wrote those words - today the "average workman" can afford to buy an already made telescope and Dobsonian mountings are very popular. Much is also unchanged - mirror grinding techniques are very similar to those written up by Porter and Ingalls in the 20´s and 30´s.


Ritchey Mirror Grinding Machine Motor National Air and

Collection Item Summary: This is the electric motor that replaced the original overhead belt-driven drive on the mirror-grinding machine built by George Willis Ritchey at the Yerkes Observatory in Williams Bay, Wisconsin, in the late 1890s.


Telescope Mirror Grinding Machines Crusher Mills, Cone

Mirror Grinding Machine, G. W. Ritchey Flickr – Photo Sharing … grind a series of telescope mirrors starting with a 24-inch and then a 60-inch mirror for a telescope initially intended for the Yerkes Observatory. The grinding machine …


Cassegrain reflector - Wikipedia

The Ritchey-Chrétien is a specialized Cassegrain reflector which has two hyperbolic mirrors instead of a parabolic primary . It is free of coma and spherical aberration at a flat focal plane, making it well suited for wide field and photographic observations.


telescope mirror grinding machine - activwater

George Willis Ritchey built this mirror grinding machine at the , the machine was used to grind a series of telescope mirrors starting with a 24-inch and then a . Know More Diy Telescope Mirror Grinding Machine


telescope mirror grinding machine price in india

henery draper mirror grinding machine . on the construction of a silvered glass telescope on the construction of a silvered glass telescope henry draper on section written by george ritchey on the grinding draper mirror grinding machine electronic grinding mill Get Price the sbau forum sbau home page glass telescope fifteen and a half inches in aperture and its use


The Perfect Machine: Building the Palomar Telescope: Florence

In December 1945, work resumed on the mirror. In October 1947, it was pronounced finished and ready to install in the telescope. Eleven and a half years had elapsed since the grinding machine started to work on the disc. Shipping the mirror from Pasadena to the mountain was another epic journey, this time by highway.


Mirror grinding - Telescope making

In some countries telescope mirrors are unavailable, so they need to be imported, at high shipping, customs, and tax cost. A 6" 150 mm or 8" 200 mm standard quality mirror will be cheaper if bought ready made. 250 mm 10" probably too.


telescope mirror grinding machine price in india

telescope mirror grinding machine . This is a photo of a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank that has been lightened by casting the mirror in a mold that made lots of hexagon shaped pockets in the back of the mirror. Read More; Mirror Grinding Machine. telescope mirror grinding machine based on Dennis Rech& 39;s M o M 20.


home made grinding machine homemade telescope mirror grinding

Grinding Machine for Large Telescope Mirrors 2017-8-9 · Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Dick Parker& 39;s Telescope Mirror Workshop: Cassegrain Telescope

Grinding the secondary is just like grinding any other optic except in minature. I ground the secondary with the mirror on a workstand and worked the tool on top just like I would grind a larger mirror. This optic is small enough that a lens grinding machine could work well.


Ritchey Mirror Grinding Machine Motor National Air and

Collection Item Summary: This is the electric motor that replaced the original overhead belt-driven drive on the mirror-grinding machine built by George Willis Ritchey at the Yerkes Observatory in Williams Bay, Wisconsin, in the late 1890s.


Telescope Mirror Grinding Machines Crusher Mills, Cone

Mirror Grinding Machine, G. W. Ritchey Flickr – Photo Sharing … grind a series of telescope mirrors starting with a 24-inch and then a 60-inch mirror for a telescope initially intended for the Yerkes Observatory. The grinding machine …


The Perfect Machine: Building the Palomar Telescope: Florence

In December 1945, work resumed on the mirror. In October 1947, it was pronounced finished and ready to install in the telescope. Eleven and a half years had elapsed since the grinding machine started to work on the disc. Shipping the mirror from Pasadena to the mountain was another epic journey, this time by highway.


telescope mirror grinding machine - activwater

George Willis Ritchey built this mirror grinding machine at the , the machine was used to grind a series of telescope mirrors starting with a 24-inch and then a . Know More Diy Telescope Mirror Grinding Machine


Development of Metallographic Specimen Polishing Machine

More recently, George Willis Ritchey, in his turn, improved and used the same type of machine, in the United States first particularly for the making of the 2.5 meter mirror destined for the Mount Wilson Hooker telescope then in France at the optics laboratory of the Dina foundation at the Paris observatory.


mirror grinding machines - Foxing Heavy Machinery

mirror grinding machines,My Mirror Grinding Machine For a long time Ive wanted to build a machine for grinding telescope mirrors Dennis Rechs MoM designs finally inspired me to just get up and do it Over the years Id been collecting motors gear boxes pulleys etc


Mirror grinding - Telescope making

In some countries telescope mirrors are unavailable, so they need to be imported, at high shipping, customs, and tax cost. A 6" 150 mm or 8" 200 mm standard quality mirror will be cheaper if bought ready made. 250 mm 10" probably too.


telescope mirror grinding machine price in india

telescope mirror grinding machine . This is a photo of a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank that has been lightened by casting the mirror in a mold that made lots of hexagon shaped pockets in the back of the mirror. Read More; Mirror Grinding Machine. telescope mirror grinding machine based on Dennis Rech& 39;s M o M 20.


Mirror Grinding Machine Leonardo Da Vinci& 39;s Inventions

The mirror or lens grinding machine is a masterpiece of mechanical engineering. It has several gears in mesh at all times and also has several variable settings built into it. This machine was most likely designed by Leonardo while he was either investigating the different ways that light reflected off things or maybe he was planning on


home made grinding machine homemade telescope mirror grinding

Grinding Machine for Large Telescope Mirrors 2017-8-9 · Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.


Ritchey Mirror Grinding Machine Motor National Air and

Collection Item Summary: This is the electric motor that replaced the original overhead belt-driven drive on the mirror-grinding machine built by George Willis Ritchey at the Yerkes Observatory in Williams Bay, Wisconsin, in the late 1890s.


Building a Ritchey-Chretien: preconditions The Grattavetro

If you are so maniacs comfort and collimation opt for the intact mirror and the diagonal plane, otherwise you can pierce the glass immediately making sure to use the part of cut glass as “plug” for the hole, during the roughing-grinding or you can pierce the mirror once it reaches the required depth, after use of the last fine grain


GRINDING A TELESCOPE REFLECTOR WITH TOOL-GRINDING DEVICE

Grinding telescope reflectors of 15-inch diameter and over makes it necessary to employ a motor-driven turntable. Small mirrors are generally ground and polished by rotating the tool, fastened to the turntable, and working the mirror blank by hand either in straight or in circular strokes over the tool. In this case the overhang of the mirror


Mirror-o-Matic mirror making machine - ATM pages of Berthold

Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician.


mirror grinding machines - Foxing Heavy Machinery

mirror grinding machines,My Mirror Grinding Machine For a long time Ive wanted to build a machine for grinding telescope mirrors Dennis Rechs MoM designs finally inspired me to just get up and do it Over the years Id been collecting motors gear boxes pulleys etc


Mirror Grinding Machine Leonardo Da Vinci& 39;s Inventions

The mirror or lens grinding machine is a masterpiece of mechanical engineering. It has several gears in mesh at all times and also has several variable settings built into it. This machine was most likely designed by Leonardo while he was either investigating the different ways that light reflected off things or maybe he was planning on


Astro-Tel - Mirror grinding machine

MIRROR GRINDING MACHINE. I made my first mirror grinding and polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telescope Making" Book 1. A bowl which rotated was fitted to the spindle. I also built another machine of the same type.


Mirror grinding - Telescope making

In some countries telescope mirrors are unavailable, so they need to be imported, at high shipping, customs, and tax cost. A 6" 150 mm or 8" 200 mm standard quality mirror will be cheaper if bought ready made. 250 mm 10" probably too.


Grinding metre scale mirror segments for the E-ELT ground

Consequently segmented mirror technology, as applied to the Keck telescopes has become the main basis for scaling up. The European Extremely Large Telescope E-ELT —Fig. 1—and TMT are next generation ground based telescopes presently under development, which will require many hundreds of metre scale off-axis mirrors , , .


Mirror Grinding Message - pokornycalounictvi.cz

Mirror-o-Matic mirror making machine - ATM pages . Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician.


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