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ritchey telescope mirror grinding machine

Ritchey Mirror Grinding Machine - National Air and Space

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.

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How to Aluminize Telescope Mirrors - YouTube

Sep 01, 2018  Modern optical telescope use mirrors and very few lenses. Unlike bathroom mirrors, where the shiny layer is sealed in to the back of the , telescopes use so-called “first surface” mirrors

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Willie Koorts

ON THE MODERN REFLECTING TELESCOPE, AND 'rHE MAKING

ON THE MODERN REFLECTING TELESCOPE, AND 'rHE MAKING AND TESTING OF OP'rICAL MIRRORS' BY GEORGE W. RITCHEY il ASSISTANT PROFESSOR OF PRACTICAL ASTRONOMY, AND SUPERINTENDENT OF INSTRUMRNT Fivefoot Mirror and Grinding Machine, Showing Method of Tipping Glass on Etlge for,Testing " , " " ' , . . 2 PI,ATE III.

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Rough Grinding a 20" Quartz Telescope Mirror on the Fixed

Mar 07, 2010  This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning. Rough Grinding a 20" Quartz Telescope Mirror on the Fixed-Post Machine

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GordonWaite

Telescope: Ritchey’s 60-inch Reflector

He continued to with telescopes, both creating mirrors and adapting existing telescopes for photography. His expertise led astronomer George Ellery Hale to choose him to design the 60-inch reflecting telescope at Mount Wilson Observatory. Mr. Clean. First, Ritchey built a machine to grind and polish the mirror.

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

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

Feb 10, 2013  Page 1 of 2 - How to make RC mirror? - posted in ATM, Optics and DIY Forum: Hi,I wonder why there is little or no information about RC mirror making in the web. You can get tons of information on newtonian telescope. Is it highly guarded secret by those who knows how to make it?

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Precise RC mirror spacingJun 12, 2013Making a homemade mirror grinding machineMar 06, 2006How to make RC mirror? - Page 2Sep 05, 2005查看更多结果

Mirror Grinding Machine

My Mirror Grinding Machine. For a long time I've wanted to build a machine for grinding telescope mirrors. Dennis Rech's M-o-M designs finally inspired me to just get up and do it. Over the years, I'd been collecting motors, gear boxes, pulleys, etc.

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Telescope: Ritchey’s 60-inch Reflector

He continued to with telescopes, both creating mirrors and adapting existing telescopes for photography. His expertise led astronomer George Ellery Hale to choose him to design the 60-inch reflecting telescope at Mount Wilson Observatory. Mr. Clean. First, Ritchey built a machine to grind and polish the mirror.

More

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

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.

More

Making a mirror with the Mirror-O-Matic - YouTube

Oct 29, 2007  'm fine grinding my 12" plate mirror blank with the M-O-M by Dennis Rech. It's an automatic mirror making machine that takes the "caveman" out of mirror grinding.

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Dick Parker's Telescope Mirror Workshop: Cassegrain

Definition of the Cassegrain Telescope The Cassegrain optical configuration was first defined by Laurent Cassegrain around 1672, a French Catholic priest who taught science classes at the College de Chartres, a high school level institution The Cassegrain configuration is a reflecting telescope characterized by two mirrors with optical power

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Stellafane ATM Main Page

A lot has changed since Russell Porter wrote those words - today the "average man" 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.

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Making a homemade mirror grinding machine - ATM, Optics

Mar 06, 2006  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. One more question will 1 1/2 shaft size pillow block bearings good for a homemade EQ mount? Thank you , John

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Newport Glass Works, LTD. Grinding, Polishing and Figuring

This is why you don't want to make mirrors to be ed on machines too thin. For 16" to 18" mirrors, 1.62" thick is the thinness I would recommend. There are several ways to support the mirror on a grinding and polishing machine turntable, but first make sure the turntable itself is rigid. It

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Document sans nom - Astrosurf

As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devs. Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze.

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TELESCOPE MAKING - deep-sky

The Ritchey-Chretien (RC)Cassegrain design of telescope is the one invariably chosen for most of the World's professional telescopes - including the Hubble Space Telescope. On axis it is perfect as the ray trace shows. Off axis it is corrected for coma - the bain of amateur reflecting telescopes but it does suffer from some astigmatism.

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Telescope Making Supplies - willbell

Throughout the grinding and final lapping stages, the objective has been to reduce pits and scratches to the smallest possible size. However, no amount of grinding can produce a surface smooth enough or sufficiently transparent to meet the needs of a first-class telescope objective. Different techniques are

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How I built an edge grinder for telescope mirror blanks.

How I built an edge grinder for telescope mirror blanks. I borrowed a few ideas from the Mirror-O-Matic mirror grinding machine, particularly how to mount the turntable on top of the pulley. Anyone building machinery for cold-ing should have a look at the MOM web site and plans. [Mike's telescope shop] [Mike's home-built

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George Willis Ritchey: Astrophotographer

Ritchey wore many hats. He was an astronomer, a telescope designer, and an expert optician. He took the technology of mirror grinding to new levels of perfection —such that his 60-inch mirror grinding machine now rests in the Smithsonian. He is the “R” in the RC optics used in most large telescopes today, such as the Hubble Space Telescope.

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jeffbaldwin

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.

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Mount Wilson Observatory Building the 100-inch Telescope

George Ritchey, master optician, designed this machine to figure the parabolic surface of the 100-inch mirror. Here the mirror can be seen in its horizontal position with the large grinding tool above and to

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How I built an edge grinder for telescope mirror blanks.

How I built an edge grinder for telescope mirror blanks. I borrowed a few ideas from the Mirror-O-Matic mirror grinding machine, particularly how to mount the turntable on top of the pulley. Anyone building machinery for cold-ing should have a look at the MOM web site and plans. [Mike's telescope shop] [Mike's home-built

More

George Willis Ritchey: Astrophotographer

Ritchey wore many hats. He was an astronomer, a telescope designer, and an expert optician. He took the technology of mirror grinding to new levels of perfection —such that his 60-inch mirror grinding machine now rests in the Smithsonian. He is the “R” in the RC optics used in most large telescopes today, such as the Hubble Space Telescope.

More

Mount Wilson Observatory Building the 100-inch Telescope

George Ritchey, master optician, designed this machine to figure the parabolic surface of the 100-inch mirror. Here the mirror can be seen in its horizontal position with the large grinding tool above and to

More

Astro-Tech Ritchey-Chrétien optics Astronomics

Computer designed and fabricated optics: To keep the cost of each Astro-Tech R-C so reasonable when compared to competitive R-C scopes, the computer-optimized Astro-Tech hyperboloid mirrors are automatically ground and finished to very high tolerances using custom-made computerized mirror grinding machines. This precision computer control

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Mirror grinding - scopemaking

There are many reasons for grinding your own mirror. Either you want a unusual size, or focal length, or to satisfy your curiosity, or to have the "pride of achievement" by fabricating something as precise as a telescope mirror.

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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 . Making a telescope mirror is one of the most satisfying and sublime joys you will experience. It's also arguably the most accurate surface made by man or machine.

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Telescope Mirrors, Blanks, Secondaries, Grinding Materials

Telescope Mirrors, Blanks, Secondaries, Grinding Materials, Testers, Aluminising, Making Adv Information. Telescope Mirrors, Blanks, Tools, ASTRONOMY Telescopes Astronomy Telescope Mirrors, Blanks, Tools, Aluminising, Testing, and Materials for Mirror Making. Please email or call for information, pricing confirmations and shipping

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Telescope Mirror Kits - Firsthand Discovery

Want to build your own telescope? Start with one of our telescope mirror kits. Each kit comes with a telescope mirror blank and all the abrasives (silicon carbide grits and white aluminum oxide powders), cerium oxide polish and pitch to grind and polish it to your specifications.

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Replicating Ritchey Mirror grinding machine - ATM, Optics

Mar 06, 2006  Replicating 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 airport.What really caught my attention however, was that they moved the Ritchey mirror making machine from the old Paul

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jeffbaldwin

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.

More

Telescope mirror grinding machines

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 inch and then a inch mirror for a telescope initially intended for the Yerkes Observatory

More

10Inch Ritchey Chretien Cassegrain ATM Project

10" Ritchey Chretien Cassegrain ATM Project Jump ahead to: The mirrors The mechanical components Aluminum coating The finished telescope Adding a guide scope Collimation Rebuilding the mirror support. I had made Newtonian telescope mirrors before ann two classical Cassegrains of 8inch and 17.5inch aperture.

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Stellafane ATM: Materials Tools

Materials Tools Introduction. Topics on this page: Mirror Blanks, Grinding Polishing Tools, Grits Pitch, Storage Containers, This is the focus of all your - you will turn this flat piece of into an accurate parabolic telescope mirror. We recommend a full thickness Pyrex blank for mirrors

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Mirrors - Telescopes

We are your source for astronomy telescopes, eyepieces, astroimaging cameras and imaging accesories, telescope mounts, more!

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Making my own fixed post mirror grinding/polishing machine

Oct 15, 2012  Page 1 of 2 - Making my own fixed post mirror grinding/polishing machine - posted in ATM, Optics and DIY Forum: Hey guys. Im thinking of making my own fixed post mirror grinding/polishing and curve generating machine. Ive got loads of questions regarding the design so Ill just start firing away Do I need an eccentric moving tool to be able to polish a mirror spherical? Would

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Astro-Tech Ritchey-Chrétien optics Astronomics

Computer designed and fabricated optics: To keep the cost of each Astro-Tech R-C so reasonable when compared to competitive R-C scopes, the computer-optimized Astro-Tech hyperboloid mirrors are automatically ground and finished to very high tolerances using custom-made computerized mirror grinding machines. This precision computer control

More

Making a Mirror grinding Polishing machine - ATM, Optics

Mar 16, 2015  Page 1 of 5 - Making a Mirror grinding Polishing machine - posted in ATM, Optics and DIY Forum: Hello, I am on the half of the way to make a mirror grinding machine inspired by original M-O-M design. I made the pulley arrangement such a way that, both the turn table eccentric spins at 50 RPM fixed.

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10Inch Ritchey Chretien Cassegrain ATM Project

10" Ritchey Chretien Cassegrain ATM Project Jump ahead to: The mirrors The mechanical components Aluminum coating The finished telescope Adding a guide scope Collimation Rebuilding the mirror support. I had made Newtonian telescope mirrors before ann two classical Cassegrains of 8inch and 17.5inch aperture.

More

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.

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Parabolizing a Telescope Mirror - BBAstroDesigns

We had communicated for year on the net. I had my 16 F5 telescope whose mirror I made and knew very well from the interferometry data. The telescope itself was still a in progress and I think the mirror was not yet coated. The telescope had no tracking and was very unstable. It jiggled when you toughed the eyepiece.

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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

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Telescope Mirrors, Blanks, Secondaries, Grinding Materials

Telescope Mirrors, Blanks, Secondaries, Grinding Materials, Testers, Aluminising, Making Adv Information. Telescope Mirrors, Blanks, Tools, ASTRONOMY Telescopes Astronomy Telescope Mirrors, Blanks, Tools, Aluminising, Testing, and Materials for Mirror Making. Please email or call for information, pricing confirmations and shipping

More

telescope mirror grinding machine xb1jp

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.

More

Mirrors - Telescopes

We are your source for astronomy telescopes, eyepieces, astroimaging cameras and imaging accesories, telescope mounts, more!

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Mike's Telescope Workshop - mdpub

I finally decided it was time to build a machine to help me grind the edges of the blanks true and round. This is my home-built edge grinding machine for grinding down my home-cast mirror blanks. Click to see the whole project. This is a 12.5 inch diameter, 1.5 inch thick, light-weight honeycomb-back telescope mirror blank that I made myself.

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Mirror grinding - scopemaking

There are many reasons for grinding your own mirror. Either you want a unusual size, or focal length, or to satisfy your curiosity, or to have the "pride of achievement" by fabricating something as precise as a telescope mirror.

More

How I make Telescope Mirror Blanks - mdpub

Now that I have several blanks made, it is time to grind and polish one into a telescope mirror and test it out. I can use one blank as the mirror and another as the grinding tool, and have a couple in reserve in case something goes horribly wrong during the grinding and polishing operations. I'll post an update once a mirror is completed.

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How to Make Your Own Telescope Mirror - Instructables

How to Make Your Own Telescope Mirror: [Fig 1] This is a large piece of a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. Cutting it into smaller sections can be difficult but scoring it with a cutter and tapping t

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