mirror grinding

mirror grinding

  • 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 and grinds faster, needing less abrasives and with these small sizes, the low expansion glass like Pyrex has no practical (visible at ...

  • Joy of Mirror Making: Rough Grinding - BBAstroDesigns

    31 行  Here is a 25 inch [635cm] mirror being rough ground followed by a beautiful grinding stand

  • MIRROR DIAMETER2.533.540.1000.0830.07260.1500.1250.10780.2010.1670.143100.2510.2090.179查看bbastrodesigns的所有31行
  • 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.

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

    May 11, 2017  Page 1 of 2 - 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?

  • First time mirror grinding 8" f/5Jan 05, 2020Making a Mirror grinding Polishing machineMar 16, 2015Mirror grinding machine-runoutFeb 21, 2015Making a homemade mirror grinding machineMar 06, 2006查看更多结果
  • Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

    Please see the Buy Telescope Mirror Blanks page for low prices on plate glass mirror blanks. If you'd like to buy a complete mirror grinding KIT, with all abrasives and grinding tool included, please see the Buy Telescope Mirror Kits. website for the lowest prices on plate glass telescope mirror grinding kits.

  • 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! ... Grinding a 25-Inch F3 Telescope Mirror ...

  • 作者: GordonWaite
  • Mirror-o-Matic mirror making machine - ATM pages of ...

    Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician.

  • Stellafane ATM Main Page

    IntroductionGeneral InformationTelescope Mirror MakingOptical TestingATM Resources ReferencesA lot has changed since Russell Porter wrote those words - today the \"average workman\" can afford to buy an already made telescope and Dobsonian mountings are very popular. Much is also unchanged - 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 fabricate their own instruments, for the pride of accomplishment, the gaini在stellafane.org上查看更多信息
  • 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.

  • Stellafane ATM: Mirror Making Overview

    Mirror Grinding at the Spring 1998 Stellafane Mirror Workshop in the McGregor Observatory Rough Grinding. The purpose of rough grinding is to start to cut a spherical concave surface into the mirror blank. For a 6" mirror with a 48" focal length, the depth of the curve is 0.047".

  • Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

    Please see the Buy Telescope Mirror Blanks page for low prices on plate glass mirror blanks. If you'd like to buy a complete mirror grinding KIT, with all abrasives and grinding tool included, please see the Buy Telescope Mirror Kits. website for the lowest prices on plate glass telescope mirror grinding kits.

  • 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.

  • Making a homemade mirror grinding machine - ATM, Optics ...

    Mar 06, 2006  The larger one is for grinding and polishing mirrors and is also used at higher speeds to centrifugally cast resin mirrors, an experiment I am playing with in my spare (sic!) time. The smaller mirror is used for power wrapping epoxy impregnated fiberglass around mandrels for making tubes and cylindrical components for open trusses.

  • Stellafane ATM: Measuring Sagitta

    Don't confuse lower case r (mirror radius) with upper case R (Radius of Curvature) which is twice F (Focal Length). Calculating Sagitta. Before you start grinding, you should have decided on your mirror's desired focal length. The two most common beginners' mirrors, the

  • 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.

  • 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.

  • Telescope Making Supplies - willbell

    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

  • Telescope Mirrors - Orion Optics

    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.

  • Optical Testing of Parabolic Mirrors : 9 Steps (with ...

    A mirror mount is needed to hold the mirror during testing. If the mirror is a 'thin' mirror (i.e. the thickness is much less than 1/8th its diameter) then the mount must hold the mirror without deforming it. The weight of the glass can deform a thin mirror. In my case, I was making a full-thickness mirror, which is a mirror whose thickness is 1/8th the diameter or more, so mirror deformation ...

  • Moulding Knives, Templates, Molding Catalog by Mirror ...

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  • Mirror Grinding Machine » Leonardo Da Vinci's Inventions

    The mirror or lens grinding machine is a masterpiece of mechanical engineering. It has several gears in mesh at all times and also has several variable settings built into it. This machine was most likely designed by Leonardo while he was either investigating the different ways that light reflected off things or maybe he was planning on ...

  • 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 ...

  • 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.

  • tut44 Making A Mirror Grinding Tool - asterism.org

    After fine grinding is complete, the mirror must be polished. It is during polishing that you “figure” the mirror by using a different polishing stroke to change the mirror’s spherical polished shape into a parabolic polished shape . See a related tutorial nearby titled, “ Making A Mirror

  • Optical Testing of Parabolic Mirrors : 9 Steps (with ...

    A mirror mount is needed to hold the mirror during testing. If the mirror is a 'thin' mirror (i.e. the thickness is much less than 1/8th its diameter) then the mount must hold the mirror without deforming it. The weight of the glass can deform a thin mirror. In my case, I was making a full-thickness mirror, which is a mirror whose thickness is 1/8th the diameter or more, so mirror deformation ...

  • 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.

  • Moulding Knives, Templates, Molding Catalog by Mirror ...

    If you're seeing this message, that means JavaScript has been disabled on your browser, please enable JS to allow this app to work.

  • tut44 Making A Mirror Grinding Tool - asterism.org

    After fine grinding is complete, the mirror must be polished. It is during polishing that you “figure” the mirror by using a different polishing stroke to change the mirror’s spherical polished shape into a parabolic polished shape . See a related tutorial nearby titled, “ Making A Mirror

  • Mirror grinding Hacker News

    Mar 10, 2017  The center of the mirror is the most likely to be contacted by any motion, so it is abraded more frequently and becomes the deepest point, while the edges are worn less. The distribution between "less" and "more" is spherical. I can at least understand the process of grinding or lapping a surface flat. Here are a couple examples:

  • 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

  • mirror grinder page

    Mirror grinding machine construction log I started thinking about building my own mirror grinding machine several years ago. Having been on the ATM list now since almost the beginning of it here on the web, I had lots of of inspiration reading of others projects and viewing their webpages

  • Buy mirror blanks for telescope making

    12 Inch Mirror Blanks, 3/4" Thick: $69 + SH (16); Shipping prices are to the USA - not shipping outside the US, sorry Combined shipping is possible - Write For a complete mirror making KIT, with all abrasives, polishing compounds, pitch, and grinding tool included, please see our Buy Telescope Mirror

  • SkyBadger - Mirror Grinding Machine

    The mirror machine came to me as a result of astronomical horse-trading, swapping a large GEM mount and a 8" Newtonian OTA for the machine as it was and a start kit consisting of two 6" blanks and the grit, rouge and pitch to manufacture a mirror. The grinding machine had been built to the design of the mirror-o-matic design of Dennis Rech ...

  • Glass and Mirror Grinding - crlaurence

    C. R. Laurence is the world leader, wholesale distributor to the Glazing, Industrial, Construction, Architectural, Hardware and Automotive Industries, supplying railing, windscreen, standoffs, and other supplies to major industries and manufacturers.

  • jeffbaldwin.org

    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, and is fixed in this position.

  • Fast Mirror Grinding Polishing - The ATMs Workshop

    Nov 15, 2001  More than that range warrants curve generation, less is adequately handled with the normal ring tool grinding methods. Mirror Polishing Techniques . After grinding the back of my 17.5" blank flat, I decided to polish it to make the detection of pits on the front surface easier.

  • Mirror Industries

    A single purchase order ensures your project is done right the first time - saving you time, money, and eliminating sub-contract mark-ups. Our extensive machine shop and experienced staff enable Mirror Industries to meet most all of your maching and hard chrome plating needs.

  • - WOS - Wenk Observatory Solutions

    After fine grinding, the mirror has to be polished. The tool - made from plaster - is the same as used for fine grinding but now carries a special polishing layer. The polish commonly used is cerium oxide. In the later stages, several other tools, coated with polishing pitch are in use.