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telescope mirror grinding machine

Telescope Making Supplies

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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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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AGI Products: Telescope Mirror Blanks

Centerless Grinding; Rotary Grinding ... TELESCOPE MIRROR BLANKS MADE TO YOUR SPECIFICATIONS. If one of our standard telescope mirror blanks isn't exactly what you're looking for, Advanced Glass can custom make a telescope mirror blank to your specifications. ... AGI can diamond machine ID holes into your mirror blank ; AGI can produce ...

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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.

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Telescope Grinding - YouTube

Jun 05, 2009· This machine can grind and polish using different stroke patterns, i.e. w-stroke, short strokes, long strokes, etc. Currently this machine can only operate a mirror/lens up to ~250mm size glass. I keep the lens/mirror in a bath with a pump to agitate the water and cerium oxide or whatever I happen to be grinding/polishing with.

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Strasbaugh polishing and grinding machine | Astromart

Strasbaugh polishing and grinding machine. You wont find very many of these around. Strasbaugh is the premier manufacture of machines used by the professionals. This machine is solid no plastic or wood. You can adjust the spindle and eccentric speed with a turn of a knob while running. It makes mirror grinding a pure joy.

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Mike's Telescope Workshop

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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Simulator (not only) polishing parabolic mirrors (POLSIM ...

Mar 12, 2018· By Giulio TiberinI March 12, 2018 Roughing and grinding machines mirrors, mirror making, tools Small tutorial on using "minimum" software bracelets for the machining of a parabolic mirror for telescope, "Assisted" by the use of a simple rotating plate, even in the digging operation of the "arrow" of the initial spherical concavity.

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Mirror grinding machine construction log - James Crombie

Mirror grinding machine construction log ... get to far and put it aside for a while as I built several med sized dobsonian telescopes, A 15" for myself and a 16" for the NBANB. Both of these mirrors were bought, but I still wanted to grind one myself. I ordered an 8" kit from Willman-Bell but it .

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How to Aluminize Telescope Mirrors - YouTube

Sep 01, 2018· Ensure you enable subtitles (click on "CC" bottom-right) to help where the sound is not audible. Modern optical telescope use mirrors and very few lenses. Un...

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Stellafane ATM: Measuring Sagitta

Before you start grinding, you should have decided on your mirror's desired focal length. The two most common beginners' mirrors, the 6" f/8 and 8" f/6, both have 48" focal lengths. Use this formula to calculate your target sagitta: Sagitta (s) = Mirror_Radius 2 / ( 4 × Focal_Length ) = r 2 / 4F

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diy lens grinding machine - cafecees

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. Get Price; Amateur Telescope Making Main PageStellafane

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Joy of Mirror Making: Rough Grinding

Rough Grinding The first milestone is putting a curve into the mirror face. The curve's depth dictates the mirror's focal length. The curve should be spherical. Creating the curve can be done by several methods: The curve is ground into the mirror face using a grinding tool. The curve is pre-generated for you.

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Telescope Mirror Making Machine - YouTube

May 09, 2013· A sample --and quite simple-- video of Vitastra's mirror making machine. This is a full-custom design first inspired on the polishing machines designed by Karl Zeiss, but then cross-inspired with ...

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Parabolizing a Telescope Mirror - BBAstroDesigns

Zambuto's process using a Mirror-O-Matic machine comes close to generating a properly parabolized mirror simply by following the steps outlined in his spreadsheet. Texereau states that his "group has parabolized a number of mirrors 'automatically,' in effect, by using a team of four or five operators all applying the 'same' stroke."

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GRINDING A TELESCOPE REFLECTOR WITH TOOL .

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 ...

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Simulator (not only) polishing parabolic mirrors (POLSIM ...

Mar 12, 2018· By Giulio TiberinI March 12, 2018 Roughing and grinding machines mirrors, mirror making, tools Small tutorial on using "minimum" software bracelets for the machining of a parabolic mirror for telescope, "Assisted" by the use of a simple rotating plate, even in the digging operation of the "arrow" of the initial spherical concavity.

Get Price

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.

Get Price

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. After setup, you'll see how abrasiv...

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Parabolizing a Telescope Mirror - BBAstroDesigns

Zambuto's process using a Mirror-O-Matic machine comes close to generating a properly parabolized mirror simply by following the steps outlined in his spreadsheet. Texereau states that his "group has parabolized a number of mirrors 'automatically,' in effect, by using a team of four or five operators all applying the 'same' stroke."

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Amazon: telescope mirrors

Best Seller in Machine Tool Inspection Mirrors. Ullman Devices HTC-2 High-Tech Telescoping Inspection Mirror, 2-1/4" Diameter, 6-1/2" to 36-3/8" Length. 4.6 out of 5 stars 302. ... Short-axis Secondary Mirror 25mm Newton Reflector Spherical Primary Mirror Lens Secondary Mirror DIY Astronomical Telescope Mirror. $66.99 $ 66. 99. FREE Shipping.

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Mirror Grinding Machine | Hackaday

Sep 26, 2006· Grinding and polishing your own mirrors is a long, arduous process. Instead of lapping the blank by hand, Laurie Hall built this mirror grinding machine from scratch.

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Newport Glass Works, LTD. Grinding, Polishing and Figuring ...

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.

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What are the best sources for mirror blanks? - ATM, Optics ...

Jun 12, 2016· What are the best sources for mirror blanks? - posted in ATM, Optics and DIY Forum: Ever since I found Stellafanes mirror making page, Ive been itching to build my own telescope. Im going to start with a 6-8in. Newt (the classic beginning ATM project!). All I need now are the materials! I can find the yogurt containers pretty easily. For the rest of it, I had to .

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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-working glass should have a look at the MOM web site and plans. ... I drew concentric circles on the top of the tabletop in the sizes of common telescope mirror blank diameters ...

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Mel Bartels' Amateur Telescope Making

The I.A.U. named asteroid 17823 Bartels discovered 1998 by J.M.Roe in recognition for my contributions to amateur astronomy. Making is the Key to Knowing. A telescope mirror is arguably the most accurate surface made by human or machine. Amazingly you can grind a mirror by hand and make a telescope with simple hand tools.

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World Wide Mirror Class List - Stellafane

Other Mirror Classes. This page lists mirror making making classes that we are aware of. Just like our Stellafane mirror class, these groups will help you learn how to make a telescope mirror, and provide guidance, instruction, and mentoring to help you with your project, and connect you with knowledgeable ATM's to answer your questions.

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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.

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Large Homemade Telescope Making Project

(3) A homemade telescope mirror can be made with more accuracy and smoothness than the mass-produced, commercial mirrors available today. Unfortunately, the cost of mirror grinding kits and pyrex blanks has increased significantly in recent years to the point where any savings from making a mirror versus buying one are minimal at best.

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

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.

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