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Mirror Grinding F6

Stellafane ATM: Selecting a Telescope

Build your own telescope part 1: The mirror. by Thomas | posted in: Astronomy, DIY | 4 ... Rough grinding. ... In 1989, my then 13 year old daughter ground a 6″ F6 mirror that tested to better than 1/20 wave in white light. Back then you could not get a pure green light source at any reasonable price.

Mirror grinding - Telescope making

Mirror Making Machine – Welcome to the Fansler's. Bugger this for a Lark – A machine has got to be easier! I made my first telescope mirror, by hand in … could not afford the material to build a mirror grinding machine …

Mirror Grinding Tutorial | Mirror | Abrasive - scribd.com

Stellafane, Home of the Springfield Telescope Makers Inc., Springfield, Vermont, USA, Amatuer Telescope Making. Amateur Telescope Making Main Page. Russell Porter Grinding a Mirror ... mirror grinding techniques are very similar to those written up by Porter and Ingalls in the 20´s and 30´s. Many amateur astronomers still choose to …

Cutting Circle in 1/4 Inch Glass - Telescope Mirror - YouTube

Mirror Making: Grinding Job Description: Personal Time ... Hours Minutes: Project Time Days: 8 inch Pyrex blank roughed to F6, under size tool. 8 : 1: Making full size tile/epoxy tool. pouring/trimming molding/trimming ... And remember the telescope we built won't track so with high power we will spend a lot of time at the finder scope. Did you ...

That would make a 150 mm F8, or a 200 mm F6 mirror. First phase : rough grinding (or hogging out) In this stage of grinding we want to dig out the flat glass blank, in other words, create a saggita.

Conical Cross-section Newtonian Parabolic Mirrors - …

So I buy a 12 1/2 inch grinding tool and we pour a pitch lap on the grinding tool. They read the mirror and tell me an F6 mirror won't be hard to parabolize. Testing with the knife edge at the center of curvature they see the mirror has almost no shadows in the center indicating that it is nearly spherical. They tell me to reduce the grooves at ...

24" F/6 thin telescope mirror grinding 3/4" plate - ATM ...

Mirror Making Machine – Welcome to the Fansler's. Bugger this for a Lark – A machine has got to be easier! I made my first telescope mirror, by hand in … could not afford the material to build a mirror grinding machine …

Telescope Mirror Grinding Machines | Crusher Mills, …

Dec 15, 2017· The mirrors will be flexed and f6 should be easier than a faster mirror. Grinding and polishing on my machine should produce a superb sphere that will take very little flexing to form an excellent f6 parabolic surface.

Making an 8 inch F 8 Telescope, D - al coat

The 10" Newtonian F6.7. And oh my lord, what a project it was. I had begun it during my sophomore year at Lane Tech, by purchasing a 10" Edmund Scientific mirror grinding kit from a friend of mine, who had bought it for $40 and, after discovering that he did not have the time or equipment to finish it, sold me the works for $10.

Conical Cross-section and Standard Parabolic Mirrors

Selecting a Telescope. This page will briefly discuss some of the things a beginner should consider when selecting an astronomical telescope to build or to purchase. ... We hope these web pages will show you telescope and mirror making is not that hard, and the rewards and satisfaction are tremendous. That said, if you are more interested in ...

Mid-Atlantic Mirror Making #15 - delmarvastargazers.org

Nov 06, 2013· Page 1 of 2 - 24 F/6 thin telescope mirror grinding 3/4 plate - posted in ATM, Optics and DIY Forum: A friend and I have decided to grind this as a fun yet challenging project. I have ground and polished several mirrors including a 6, 8.5, 9.2, and 14.7 quartz mirror. I have decided to take the next step with this ultra-thin setup. I …

Mirror-O-Matic - Dr. Debug

The mirror can be divided into zones such as the edge zone or the center zone or into zones expressed as percentages measured from the mirror's center to the mirror's edge. As measured from where the mirror's center rays cross the mirror's axis, each zone should cross at a point r^2/2R, where little r is the mirror's radius and big R is …

Building an Equatorial Mount Reflector Telescope - …

Load "10 inch F6 Dob.3d". This is the same file that I used in making the introduction to EZ3D Designer. This particular lessen is about component rotation.

mirror grinding machine setup - kilawarhing.in

Jan 17, 2017· Grinding materials to make a 8" f6 mirror. I did need much more Cerium Oxide polishing agent though, I made so many mistakes trying to Figure it, …

The Joy of Mirror Making: Parabolizing - BBAstroDesigns

REFLECTOR TELESCOPE KITS—You will note that there are two lists of parts printed on these pages. There is an economy kit of parts for around $27 and another kit, illustrated here, for $150. Why the large difference? Primarily, it is the difference between buying a finished para­ bolic mirror and grinding your own.

Unbranded/Generic Telescope Mirrors and Prisms | eBay

We will begin with 6" F-8, 8" F-6, 10" F- 6, and 12.5" F6 mirrors and tools with diamond generated curves; ready for 220 grit. Successful mirror makers will leave the Seminar with a fine-figured mirror ready for aluminizing.

24" F/6 thin telescope mirror grinding 3/4" plate - Page …

Conical Cross-section Newtonian Parabolic Mirrors _____ Now in 8", 10" and 12.5" sizes with unique single bolt continuous face mounting and in 14.5" and 16" sizes with through-cored stud mounting. A New and Better Type of Mirror for Newtonians

The Joy of Mirror Making: Parabolizing - BBAstroDesigns

Shop eBay for great deals on Unbranded/Generic Telescope Mirrors and Prisms. You'll find new or used products in Unbranded/Generic Telescope Mirrors and Prisms on eBay. Free shipping on selected items.

DMSG Mirror Grinding Seminar Intro - …

GSO Parabolic Primary Mirror - 8" f/6 ... I used to grind my own but these mirrors are very good and less than the cost of grinding my own. On GSO Parabolic Primary Mirror - 8" f/6 ... I purchased the GSO 8 inch f6 primary and secondary mirror set from Agena to use in a travel scope I was building. I finished the scope a couple months …

Jeff Duntemann's Junkbox Telescope Gallery - …

telescope mirror grinding machine - … This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning.

ATM - Grinding a 8" Mirror - knology.net

Click on any picture for a larger version 8" F6 Mirror Grinding For grinding tools I have read that it is recommended to use dental plaster or pure cement as a ... 20" mirror grinding log by Mel Bartels 20" mirror specs: fine annealed 7740 pyrex, back ground flat with large shallow bevel at back edge, 20 3/8" dia., 2 1/8" thick, ...

The Giant Binocular | The Hobby-Machinist Forum

All mirror-making materials will be furnished and expert mirror makers will be available to guide each person's activities. We will begin with 6" F-8, 8" F-6, 10" F- 6, and 12.5" F6 mirrors and tools with diamond generated curves; ready for 220 grit.

Telescope Mirror Grinding Machines | Crusher Mills, …

Oct 27, 2011· This video shows a few initial stages of making a primary mirror for a 6" f/8 telescope. I'm a newbie so bear with me in my ignorance as a first timer making...

Amateur Telescope Making - Allarscopes

Larger mirrors and conical cross-section mirrors may take longer to manufacture due to lead time required to manufacture blanks. Please note: The following are mirrors at standard focal ratios found to be commonly useful for various applications.

Conical Cross-section and Standard Parabolic Mirrors

Grinding an 8" Fritz Mirror: 4.71 Focal Length: Here's the 8" mirror after finishing with 60 and 80 grit. The curve matches a f/6 template, which I later found out is anywhere between f4.8 and f7.

8" F6 Mirror Grinding - Dr. Debug

The mirror can be divided into zones such as the edge zone or the center zone or into zones expressed as percentages measured from the mirror's center to the mirror's edge. As measured from where the mirror's center rays cross the mirror's axis, each zone should cross at a point r^2/2R, where little r is the mirror's radius and big R is …

mirror grinding - crusherasia.com

Mar 03, 2015· I will be fusing 5, 1/4 inch circles together in a kiln to make an 8 inch primary mirror for a telescope. The finished product will then be ready for grinding into a highly precise 8 inch f6.5 ...

8in f5 Assessment of a polished telescope mirror - YouTube

Nov 19, 2016· This feature is not available right now. Please try again later.

Stellafane ATM Main Page

Larger mirrors and conical cross-section mirrors may take longer to manufacture due to lead time required to manufacture blanks. Please note: The following are mirrors at standard focal ratios found to be commonly useful for various applications.

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

However, I was told that a F4 mirror is not very easy to make especially if you are grinding your first one. Therefore I decided to make a F6 mirror instead of F4. I knew I was participating an English language course in Australia next summer and of course wanted to have the telescope with me under the southern hemisphere.

First mirror grind advice - DIY Astronomer - Stargazers …

Each optical surface is tested up to 29 times as it passes through its many processes of being turned from a blank piece of glass to a highly accurate figured mirror or lens. Below is our selection of Telescope Mirrors available to purchase and a brief description of each grade's qualities.

Figuring the Perfect Mirror - ATM optical coating

Click on any picture for a larger version: 8" F6 Mirror Grinding. For grinding tools I have read that it is recommended to use dental plaster or pure cement as a substrate.

REFLECTOR TELESCOPE KITS—You - Vintage Projects

Since at the time mirror grinding seemed like a forever task, I started looking at buying the parts to build route. ... Build a machine to grind the mirror (AKA mirror-o-matic) Buy some glass. ... As of this writing I have successfully ground an polished the 8" to a F6. I'm currently in the process of learning how to parabolize it. :-O ...

Buy Telescope Mirrors - Official Website for JMI ...

Aug 29, 2009· Page 2 of 2 - 24 F/6 thin telescope mirror grinding 3/4 plate - posted in ATM, Optics and DIY Forum: Are there plans/parts list available for this setup?

GSO Parabolic Primary Mirror - 8" f/6 - AgenaAstro.com

8" F6 Mirror Grinding - Dr. Debug . For my grinding tool I used Portland cement. This was readily available an cheap. For the 8" mirror I made a sub-diameter tool. ... I am grinding a mirror from a 6'' glass blank using another blank as the tool. I can see (by putting up a ruler ) that there is a small sagitta formed after 1 hour or so of work. ...

Grinding my first 6" f/8 Telescope Mirror - YouTube

Jim's Mobile, Inc. (JMI Telescopes) is a world renowned manufacturer of astronomical telescopes and aftermarket accessories for the amateur and professional astronomer. We manufacture telescopes and accessories such as telescope wheels, carrying cases, guiding computers, focusers, motors and motor controls and much more.