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

Placing the mirror face up and grinding with a moderate "W" stroke will also move the curve toward the edge, and tends to produce a more spherical surface. Leaving the mirror grossly hyperbolic will make fine grinding difficult. Fine Grinding . We've all heard stories about fine grinding taking hundreds of …

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Parabolic Mirror Grinding Machines | Products & Suppliers ...

Products/Services for Parabolic Mirror Grinding Machines. Grinders and Grinding Machines - (984 companies) Grinders and grinding machines use an abrasive that is bonded to a wheel, belt or disc to remove material and improve surface finish. Devices can be pneumatically driven or powered by a combustion engine or electric motor.

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Tips for Using Mirrors in Copper Foiled Stained Glass

Sep 02, 2020· Grinding Mirrors. Silver backing chips very easily so use the finest grit grinder head you can get – super fine if possible. Alternatively, use an old grinder head which is dulled already. If you use a coarse grit it will chip into the mirror backing; Keep the backing uppermost to …

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Mirror Grinding Machine | Products & Suppliers ...

Description: Orbital polishing machine type LPC 500 mirror has been designed, like the other two smaller versions, for straight and bent tube mirror polishing up to maximum diameter 203 mm.; this unit is equipped with liquid polishing paste dispenser and with inverter device for polishing . Applications / Materials Abraded: Ceramics / Glass; Driver Technology: Electric Motor / Vibrator

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Mirror grinding | Diy telescope, Refracting telescope ...

Grinding a 25-Inch F3 Telescope Mirror: Thinning and Flattening the Back. Gordon started with a 2" thick telescope mirror that weighed about 70 pounds. By thinning the blank, he's lightened the mirror by about 20 pounds!

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Grinding a 6 inch Mirror - Page 3 - ATM, Optics and DIY ...

Feb 22, 2010· Page 3 of 3 - Grinding a 6 inch Mirror - posted in ATM, Optics and DIY Forum: You don't test the mirror till it's fully polished, period. this is what they taught at Delmarva Mirror Making and there were hundreds of mirrors over the years, all made in a 3 day weekend. in 3 days. From pre-generated curve grinding 80 grit to 1/8~ figured finished mirror.

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US1171174A - Parabolic-mirror-grinding machine. - Google ...

Parabolic-mirror-grinding machine. Applications Claiming Priority (1) Application Number Priority Date Filing Date Title; US86695214A US1171174A (en) : : Parabolic-mirror-grinding machine. Publications (1) Publication Number Publication Date ...

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Joy of Mirror Making: Rough Grinding - BBAstroDesigns

31 · Grinding the curve into the mirror face can be done by one of the following approaches: …

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Thin Telescope Mirror Grinding Advice

FORCE. When grinding thin mirror blanks, be conscious of downward pressure, which if excessive, may bend the mirror blank momentarily out of shape. While this is not a problem during rough grinding (as the amount of flex is exceedingly small) the effect becomes important as you reach the later stages of making your telescope mirror.

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Stellafane ATM: Fine Grinding

in the 2001-02 Stellafane Mirror Class. Fine grinding refines the basic shape you have ground into the surface of the glass with rough grinding. The sequence of ever finer grits that you use smoothes the rough surface that was made in rough grinding, and prepares you for polishing. You are also refining the shape of the surface to be a section ...

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Grinding a 6 inch Mirror - ATM, Optics and DIY Forum ...

Jun 17, 2009· Page 1 of 4 - Grinding a 6 inch Mirror - posted in ATM, Optics and DIY Forum: Hey Everyone, I first made a 6 f/10 telescope back in 2002. It was, as everyone called it here the minimum size you should make. So I went ahead with it. The f/10 was because some gentleman had ground the glass to f/10 and abandoned it in the local astronomy club and the president of which handed to me.

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spin grinding a slumped mirror - ATM, Optics and DIY Forum ...

Nov 18, 2017· spin grinding a slumped mirror - posted in ATM, Optics and DIY Forum: so after taking a few years off from the hobby to get my wife well i have completed my spin grinder and am ready to tackle the 14 honeycombed mirror that you see as my avatar i had it fused to shape many years ago and it is slumped to an F5 curve. i have not used a spin grinder as yet all my work has been done by hand or ...

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Swayze Optical! - Home Page

Grinding and polishing the mirror is the most difficult part of making a telescope. And the most critical. Mirror-making is a hobby that has been around for many years, and many people have put their hands to the task, but it is time consuming, requiring a great deal of skill, patience and perseverence. Especially when the mirror gets big.

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Making a Concave Mirror - University of Arizona

Jan 18, 2018· That is, we could have spent less time on the grinding process and made a mirror of even longer focal length. This first aluminum mirror projects a very nice image. I then decided to make a second mirror that was only 2.5 cm in diameter, corresponding to …

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How to do mirror finish grinding by a grinder

Mar 08, 2021· Mirror grinding is a grinding that the surface roughness of the workpiece is Ra< 0.01μm, and the light is like a mirror after grinding, so it can be clearly photographed. The flatness of the grinding surface is not greater than 3μm /1000mm. The surface machining of high precision and high added value parts requires mirror grinding. 2. Grinder ...

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Grinding your own mirror - How is it possible to get ...

Dec 31, 2016· Page 1 of 2 - Grinding your own mirror - How is it possible to get accuracy in the nm? - posted in ATM, Optics and DIY Forum: So I have read forum questions & answers on topics such as whether it is possible to use a 3D printer to design and print out a telescope mirror, or design an array of paraboloids this way for a segmented design, and the answers have been, no, the 3D printers dont …

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Ductile mode grinding of reaction-bonded silicon carbide ...

The demand for reaction-bonded silicon carbide (RB-SiC) mirrors has escalated recently with the rapid development of space optical remote sensors used in astronomy or Earth observation. However, RB-SiC is difficult to machine due to its high hardness. This study intends to perform ductile mode grind …

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Obsession Telescopes / Optics

Obsession Telescopes feature primary mirrors made by two of the best established and most reputable optical companies serving the astronomy community today. Optical Mechanics Inc. (OMI) supplies Obsession with 12.5" to 25" aperture mirrors. Ostahowski Optics supplies Obsession with 15" to 22" aperture mirrors. Ostahowski Optics is well known as ...

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Woodware: Mirror Grinding Stand

Mirror Grinding Stand (above) The front view and top views show the Mirror Grinding Stand with its wide base (big enough to walk around on), pedestal, and small top. The top is only a little bigger than the largest mirror you wish to grind. The mirror tool is held to the table with three screwed down blocks and six small wedges.

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Grinding a 25-Inch F3 Telescope Mirror: Thinning and ...

Dec 16, 2014· Gordon started with a 2" thick telescope mirror that weighed about 70 pounds. By thinning the blank, he's lightened the mirror by about 20 pounds! This vid...

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Stellafane ATM: Pour a Pitch Lap

A pitch lap is used to polish and figure your mirror. It is used with a polishing abrasive such as Cerium Oxide. Traditionally, the lap is poured on the tool used to grind the mirror. But this means the that tool is no longer available should you need to return to fine grinding due to a scratch or other problem.

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Mirror grinding - scope making

A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer …

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

The problem with thin mirrors is that they flex more easily during grinding and polishing, making it hard to achieve the required surface precision. They also need a more complex mirror cell (additional support points). Plop is a useful software to let you calculate the number of points needed based on the diameter and thickness of the glass:

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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. Most of them came from industrial junk yards.

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Robotic mirror grinding? - ATM, Optics and DIY Forum ...

May 31, 2021· It is not a robot, but just a pattern of polishing. For big aperture though, spinning a large mirror and moving a large polisher might be too much work. That is why the mirror lab spun caste their glass to avoid hogging, and then had a robot go around grinding and polishing the high spots. Or maybe they spun ground it.

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Wooden Telescope Part 1: the Mirror : 14 Steps (with ...

The grinding of the mirror was done at home. It took more than a month to finish the mirror grinding and getting it silvered. The mount was also built and enjoyed viewing the craters of the moon and especially Saturn rings. Used the links you have provided. A. S, Bhasker Raj Bangalore India.

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3mirrors ALUMINUM Tungsten Electrode Sharpener Grinder ...

When grinding: Apply light pressure to the wheel. Heavy pressure will result in excessive wheel wear and a rougher tungsten point. Always wear eye protection, respiratory protection, and protective clothing when using the angles controller and when welding. Remove the grinding wheel firstly before taking out the tool after use.

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TELESCOPE MIRROR MAKING HOW TO PART 1: Rough Grinding ...

Apr 03, 2020· Welcome to my channel - in this video, we will begin to make a telescope mirror from scratch! I'll be showing you the basics of telescope mirror grinding!Her...

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

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Ceramic Grinding in Northern California (CA) on Thomasnet.com

Welcome to the premier industrial source for Ceramic Grinding in California - Northern. These companies offer a comprehensive range of Ceramic Grinding, as well as a variety of related products and services. ThomasNet.com provides numerous search tools, including location, certification and keyword filters, to help you refine your results.

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Joy of Mirror Making: Polishing - BBAstroDesigns

Then after grinding the mirror face with 220 grit, cleanup thoroughly and flash polish by polishing for 15 minutes. Don't go onto finer grits until the astigmatism is gone. The second is to identify the saddle orientation, and using a sub-diameter lap, locally polish the ends of the saddle.

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Grind and Polish a Dobsonian/Newtonian Telescope Mirror ...

The process for grinding telescope mirrors at home actually doesn't look too much different than when Isaac Newton first developed it, and he didn't have any power tools. John Dobson was a monk and did much of his work in secret from his brotherhood.

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