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mirror grinding machine design

Mel Bartels, a well respected west coast amateur, recommends on his Large, Thin Mirror Grinding web page starting with something between 30 and 60 grit, and then 120, 220, 500 (=25 micron) and finishing with 9 micron. This is just a 5 grit sequence, as opposed to 8 to 10 for the more traditional sequences usually recommended for novices.

Telescope Grinding Machine

Rough grinding. This step is about making one side of the glass concave. It will give your mirror its overall focal ratio. If you make the centre deep, you will end up with a fast telescope (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon.

mirror grinding machine design. mirror grinding machine design Mirror Grinding Machine - ATM, Optics and DIY Forum,- mirror grinding machine design,This image shows the 3D model of the overarm assembly I added to my small spin-post grinding machine (I'm building a bigger one now based on the same basic overarm design) In the one shown, the overarm is,..

telescopes mirror grinding equipment,stonemill essentials aldi

Nov 01, 2011· Hi AllWeve been having some idle discussions about grinding mirrors here. In particular, weve been discussing building a fixed post mirror grinding turntable for cutting mirrors up to about a 24inch diameter to spherical. Its only a pipe dream at the …

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Telespe Mirror Grinding Machine Techniker Leipzig. 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.

Telescope Mirrors, Blanks, Secondaries, Grinding Materials ...

As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devices. 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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Polishing a mirror is one of the great joys you will experience as a maker and builder. It's also arguably the most accurate surface made by man or machine. If the mirror is expanded to the size of a football field, then the mirror's surface will be smooth to 1/1000 inch or 1/30 millimeter!

Building a fixed post mirror grinding machine ...

The telescope mirror was purchased from Jeff Baldwin. The Project 40 team finished rough grinding, fine grinding, polishing and figuring the hand-built polishing machine. Optical testing used a large zone mask for initial figuring and two years of interferometric measurements and figuring to …

Mirrors

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.

Build your own telescope part 1: The mirror – Thomas ...

telescope grinding machine optical instruments. Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze. telescopes mirror grinding equipment kconsulting.za. how to make a telescope mirror grinding machine Grinding Mirror

Stellafane ATM: Grits, Polish & Pitch

We are your source for astronomy telescopes, eyepieces, astroimaging cameras, and more! Browse an extensive selection of astronomy equipment at Telescopes.

Fine grinding 10" telescope mirror

Thin Telescope Mirrors . Abridged from an article appearing in Telescope Making #12 Provided: Courtesy of Astronomy Magazine Article's Author: Bob Kestner . Part I - Grinding . For many years, amateur astronomers and telescope makers thought it essential that glass for telescope primary mirrors be at least one-sixth as thick as its diameter.

tut44 Making A Mirror Grinding Tool

A telescope mirror is designed to form a diffraction limited image of a point source. Ideally, a certain percentage of the light in the image will fall within the diffraction disk diameter. The Strehl ratio compares the mirror's actual performance in terms of its ability to …

Telescope Mirrors

Jul 21, 2006· While it's true that the aluminized surface of a telescope mirror will deteriorate over time, there is no hard and fast rule about how long this will take. Some coatings last only a few years, while others will outlast you. Indeed, the coating on my very first reflector telescope looks absolutely perfect in spite of being more than 30 years old.

Joy of Mirror Making: Polishing

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.

Telescope Products & Services

telescope mirror grinding machines . Get Price Read More Mirror Grinding Machines telescope mirror grinding machine – Grinding Mill China Grinding and Testing a Telescope Mirror RASC St John s Centre You need special machinery to grind a mirror Indeed you do if you are going to use machinery at all The machinery must be made to mimic the human action Humans make the best

tut44 Making A Mirror Grinding Tool

Telescope Mirror coating - recoating - aluminising, telescope mirror blanks, polishing, grinding and pitch supplies. ... We offer a range of products and services for the ameteur telescope enthusiast such as grinding powders, polishing powders /compounds, telescope aluminising services.

Grinding your own mirror

US suppliers of Mirror Blanks, Grinding & Polishing Supplies, and Telescope Making Supplies. Astronomy Clubs Many can offer help with your project. Astronomy Conventions & Star Parties A good place to look at various telescopes and chat with their owners. Mirror Making Courses & Workshops

Fine grinding 10" telescope mirror

Primary Mirror Dimensions. Primary Mirror type. Focal length nominal mm. Edge thickness mm * Diameter mm. Weight g. Ultrascope 150 f4. 600. 18. 151. 745. 150 f5. 750 ...

How will you know when you telescope mirrors need re ...

want to learn more about Newtonian telescopes the internet is replete with information about all types of telescopes. Typically, the primary mirror is made of glass. Pyrex is commonly used for the primary mirror because of its thermal stability, but for small mirrors, plate glass will work fine too. Telescope mirrors are relatively thick.

Obsession Telescopes / Optics

Aug 19, 2019· A few years ago, I was thinking about hand grinding a mirror. I watched a YouTube video of John Dobson hand grinding a mirror. I don't really remember how big it was, but it was big. Maybe 14". Maybe larger. John was no youngster in this video and even though he is a master, he sure put a hellova lot of labor into that mirror.

Amateur Telescope Making Main Page

Here at OPT, we know how long and complex a process it can be to hand pick every single component of your astronomy setup to go perfectly with your telescope. Thats why we offer a wide variety of telescope kits to do the hard work for you! We have a wide array of pre-prepared kits available for use, centered around various high quality telescopes.

Telescope Grinding Machine

Polishing a mirror is one of the great joys you will experience as a maker and builder. It's also arguably the most accurate surface made by man or machine. If the mirror is expanded to the size of a football field, then the mirror's surface will be smooth to 1/1000 inch or 1/30 millimeter!

Fixed post mirror grinder advice

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. The machine can also work smaller mirrors if the drip pan is moved to the fast shaft on ...