how to grind a telescope mirror

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  • Mirror grinding Telescope making

    2007-2-13 · Well, that depends. Mostly on the mirror size you wish to grind, and the prices of the local market. In the US, telescope mirrors are the cheapest. A decent 6" (150 mm) mirror can be bought for under 100$. In Europe, prices are usually twice, if not

  • Hand Grinding a Telescope Mirror Make:

    2014-5-30 · This is how you make a telescope mirror out of a hunk of glass: Use a sand mixture and another piece of glass to grind away the middle of a concave shape. Repeat with finer and finer grit sand. Dave Barosso demonstrates the technique, but to do it yourself, try to visit one of the Telescope

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  • To Grind a Telescope Mirror SpringerLink

    To Grind a Telescope Mirror (Three evenings) Authors; Authors and affiliations; M. G. J. Minnaert; Chapter. 121 Downloads; Abstract. This exercise is not intended to make a perfect piece of optics, but just to show the principle of the methods used in practice and to convince our students that amateur telescope making is surprisingly simple and

  • Author: M. G. J. Minnaert
  • Rough Grinding of a Telescope Mirror Guy's Math &

    2014-12-15 · (Part two of my description of the essential steps in making a telescope) 2. Hogging Out means making your mirror blank have roughly the proper concave shape for the focal length or f-ratio that you want. There are many articles and web pages on this,

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  • Stellafane ATM: Selecting the Mirror Surface to Grind

    The ProblemSimple ObservationsChecking Surface & Subsurface QualityDon't Forget The BackYou have one, possibly two, glass disks and therefore two or four glass surfaces to consider. One surface of a disk will be ground, polished and figured to become your parabolic telescope mirror, and the opposite surface will become the mirror back (and mirror mounting surface). Which to use? (Experience shows this to be a very common question from beginners that is not very well addressed in the literature).在stellafane上查看更多信息
  • Mirror Grinding Machine

    2015-8-14 · 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

  • How I built an edge grinder for telescope mirror blanks.

    2013-2-26 · The first thing I built was an extension that sits in the middle of the turntable to raise the working surface above the height of the dam. It was made from an 18 inch diameter tabletop and some scrap lumber. I drew concentric circles on the top of the tabletop in the sizes of common telescope mirror

  • Mirror Grinding Take A Class Or DIY? ATM, Optics

    2017-5-11 · Page 1 of 3 Mirror Grinding Take A Class Or DIY? posted in ATM, Optics and DIY Forum: Ive been interested in grinding/polishing my own Newt mirror for a long time but dont know how to get started. As a beginner, would you recommend attending a workshop or class or is it possible to make a good mirror using other learning resources such as books and online videos?

  • 预计阅读时间:7 分钟
  • Grinding own mirror gives you a spherical or a

    2012-8-27 · The natural mirror grinding process will create a sphere. The first part of making a mirror is to grind and polish to a sphere of the required focal length. Then the mirror is parabolised, by using special polishing strokes, that changes the figure from sphere to paraboloid.

  • Spherical Vs. Parabolic mirrors2018-6-18Collimating a RC telescope with the GoldFocus mask?2015-10-28Preventing mirror shift on an SCT2015-3-6Hi, Any one using Mirco 3/4 to adapt to telescope?2009-10-19查看更多结果
  • How to Make Your Own Telescope Mirror Instructables

    2011-8-2 · How to Make Your Own Telescope Mirror: [Fig 1] This is a large piece of glass 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 glass cutter

  • 预计阅读时间:5 分钟
  • Rough Grinding of a Telescope Mirror Guy's Math &

    2014-12-15 · (Part two of my description of the essential steps in making a telescope) 2. Hogging Out means making your mirror blank have roughly the proper concave shape for the focal length or f-ratio that you want. There are many articles and web pages on this,

  • Joy of Mirror Making: Rough Grinding BBAstroDesigns

    2020-5-19 · Because the mirror's focal length is large in relation to the mirror's diameter, in other words, the focal ratio is large, the difference between sphere and parabola is very little: a few millionths of an inch in the mirror's surface for a typical amateur telescope. We grind and polish to

  • Newport Glass Works, LTD. Grinding, Polishing and

    2014-7-21 · To grind, place the mirror face up on something soft like an old piece of deep shag carpet so the glass won't rock. (The carpet will ruined.) Wet it down, add the appropriate amount of #60 abrasive, add a few pounds to the top of the tool if you wish, and grind like mad.

  • Mirror Grinding Machine

    2015-8-14 · 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.

  • Grinding,Polishing and Figuring Part 2 Polishing

    2014-7-21 · Then you grind or polish the raised edge off, resulting in a turned edge when the mirror cools down. Turned edge problems: These can be a problem with any type or thickness of glass. It's by no means restricted to thin mirrors and it's just as often a problem with full-thickness pyrex mirrors.

  • How I built an edge grinder for telescope mirror blanks.

    2013-2-26 · The first thing I built was an extension that sits in the middle of the turntable to raise the working surface above the height of the dam. It was made from an 18 inch diameter tabletop and some scrap lumber. I drew concentric circles on the top of the tabletop in the sizes of common telescope mirror

  • 24" F/6 thin telescope mirror grinding 3/4" plate

    2013-11-6 · 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 know it is bordering on the edge of extremely thin with a 32

  • Stellafane ATM:Mirror Making Myths

    Why would grind a mirror when you can buy one just as cheaply? When the North American amateur telescope making movement began in the 1920's, there were few alternatives the only commercial telescopes where extremely expensive and often where individually commissioned. Making your own was the only way for most people.

  • Astronomy: Making a Mirror El Camino

    Preparing the Mirror Surface. Four stages of preparation are required before beginning to shape the mirror into a paraboloid. The purpose of the preparation is to make the surface of the mirror progressively smoother. Telescope mirrors have the smoothest surfaces ever made.

  • TELESCOPE MIRROR ALUMINISING Telescopes &

    2015-12-17 · TELESCOPE MIRROR ALUMINISING Mirror Size (ins) Aluminium + Quartz R>91% Aluminium Enhanced R>95% Silver Enhanced + Protected R>98% 6" $210AUD $245AUD $275AUD 8" $270AUD $305AUD $342AUD 10" $330AUD $365AUD $409AUD 11" $360AUD $395AUD $443AUD 12.5" $405AUD $440AUD $493AUD 14.5" $465AUD $500AUD $560AUD 16" $510AUD $545AUD

  • Grinding,Polishing and Figuring Part 2 Polishing

    2014-7-21 · Then you grind or polish the raised edge off, resulting in a turned edge when the mirror cools down. Turned edge problems: These can be a problem with any type or thickness of glass. It's by no means restricted to thin mirrors and it's just as often a problem with full-thickness pyrex mirrors.

  • The 8.75" f/6.7 Mirror Grind DIY Astronomer

    2017-2-4 · With this thread Ill be outlining my journey as I attempt to grind, polish, figure, and test an 8.75 f/6.7 telescope mirror. I chose this size mirror hopefully as an upgrade to my 6 f/8, yet not so big as to be over challenging for a first time mirror grind. Yep.. this is the first time Ive attem.

  • Fine Grinding the Mirror Sidewalk Astronomers

    2020-5-7 · If the tool is much smaller than the mirror blank, the fine grinding and polishing should be done with the tool on top. It is a good idea to use lukewarm water during the last wets of fine grinding, and also during polishing. Cold water may shrink the mirror face allowing us to grind or polish away the edge.

  • Flexing spheres into high-quality telescope mirrors: if

    2000-11-1 · Free Online Library: Flexing spheres into high-quality telescope mirrors: if you can grind and polish a sphere, you can make a telescope mirror that will leave nothing to be desired.(telescope techniques) by "Sky & Telescope"; Astronomy Design and construction Telescopes

  • Flexing Spheres into High-Quality Telescope Mirrors

    2020-1-14 · Telescope Mirrors If you can grind and polish a sphere, you can make a telescope mirror that will leave nothing to be desired.By Alan Adler Above: Flex cell for the author’s 8-inch f/6 telescope. Compared to the diagram on page 134, this version has several minor differences. For example, it is now recommended that the multi-

  • Telescope Mirror Making Frontier

    2011-3-6 · Front view of the mirror tester. The knife edge or Ronchi grating are inside a plastic slide holder. The front of a flashlight is rotated down to allow rough alignment with the mirror. A three-way switch allows me to turn on the flashlight bulb or the LED. My mirror stand for a 12" mirror. Another view of the mirror stand.

  • Astronomy: Making a Mirror El Camino

    Preparing the Mirror Surface. Four stages of preparation are required before beginning to shape the mirror into a paraboloid. The purpose of the preparation is to make the surface of the mirror progressively smoother. Telescope mirrors have the smoothest surfaces ever made.

  • How I make Telescope Mirror Blanks mdpub

    2012-3-19 · Here is the result of firing the above stack of glass. Once out of the kiln, I removed it from the mold, and trued up the edge on my grinder. It is a fine-looking, near full-thickness, 10 inch diameter blank that I intend to grind and polish into a 1st class telescope mirror. Here is a stack of my home-made 8 and 10 inch mirror blanks.

  • 10 Inch Telescope Mirror Kit Firsthand Discovery

    Save money and time by purchasing a telescope mirror kit. This kit includes an 10 inch telescope mirror blank, all the silicon carbide grits, white aluminum oxide powders, gugolz pitch, and cerium oxide polish you will need to grind and polish an 10 inch telescope mirror all bundled in one spot. This will get you on a great start to building your own telescope.

  • Can You Do It? Make your own telescope mirror, that is?

    I made my first mirror when I was 14, a 6” f/9 (it was supposed to be an f/8, but I had trouble getting the curve deep enough), by myself using Thompson’s Making Your Own Telescope. It probably came out no better than 1/2 wave I don’t know I really didn’t know how to test well yet.