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Telescope Mirror Blanks / TelescopeMirrorBlanksCom ,, 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 kitsGRINDING 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 ,Telescope Mirror Making: Part 3, Rough Grinding, Sep 23, 2012· After hogging the mirror blank to depth, the rough grinding stage begins In this video I am grinding with 60/90 grit The wets are lasting about 90 second,jeffbaldwinorg, 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 positionTelescope Mirror Grinding Machine | Products & Suppliers ,, The process was performed at Cranfield University Precision Engineering on the BoX grinding machine (Figure 4, left), designed for rapid and accurate grinding of large telescope mirror segments  X-Ray Telescope Mirrors-Materials, Manufacture, Tolerances And Metrology.
Telescope Mirror Grinding Machines, Telescope Mirror Grinding Machines Mc World 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 [11m] in diameter By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work ,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 ,Amateur Telescope Making Main Page, Grinding a Mirror "For it is true that astronomy, from a popular standpoint, is handicapped by the inability of the average workman to own an expensive astronomical telescope It is also true that if an amateur starts out to build a telescope just for fun he will find, before his labors are over, that he has become seriously interested in the ,Large Thin Mirror Making, In addition, a great deal of money will be saved: a finished 24" scope will set you back $7,000; grinding your own mirror and building the mount yourself will cost you $2,000 Amateurs have made mirrors up to 41" by hand A grinding machine relieves the labor, but is not necessary A 24" is the largest you can comfortably do soloDocument sans nom, This alligator device is ideal for placing the driving contact as close as possible to the mirror surface, which limits the risks of a rocking effect Yet it requires a regular shape of the mirror side (circular and vertical) The alligator is mostly used on Hindle-type machines but it may be adapted to other types of machines (see photo below).
Mel Bartels' Amateur Telescope Making, The IAU named asteroid 17823 Bartels discovered 1998 by JMRoe 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 toolsSimulator (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 POLSIM 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 concavityNewport 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 diameterObsession Telescopes / Optics, A telescope mirror is designed to form a diffraction limited image of a point source Ideally, a certain percentage of the light in the image will fall within the diffraction disk diameter The Strehl ratio compares the mirror's actual performance in terms of its ability to ,800mm, A M-o-M (Mirror-o-matic) is a very good concept The mirror rotates and the 75% diameter tool swings back and forth There's lots of information on the net about the technique 'how-to' I have two of these machines that can easily handle 20" mirrors I'm busy right now grinding a ,.
Stellafane ATM: Build Mirror Test Equipment, The Mirror Test Stand The mirror test stand must be able to support the mirror vertically The mirror will need to be aligned with the tester, which may require adjusting the overall height of the mirror with respect to the tester, adjusting the vertical tip of the mirror and adjusting the yaw, or side-to-side angle with respect to the testerDocument sans nom, As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devic Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronzeStellafane ATM:Mirror Making Myths, Mirrors can only be made with Special Precision Equipment in Expensive Factories or Labs; Not True! Telescope mirrors can be made in your kitchen, basement or garage with nothing more than the mirror blank and a second piece of glass (called the tool) to rub the mirror ,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 ,Homemade Telescope Making, (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.
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 ,Astro, 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" Fig3, Page 163, "Amateur Telescope Making" Book 1 A bowl which rotated was fitted to the spindle I also built another machine of the same typetelescope mirror grinding machines, 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 ,Telescope Making Links, Grinding,Polishing and Figuring Large Thin Mirrors - Part 2 - Polishing Astronomy, telescope making ,mirror grinding and testing Large Thin Mirror Making by Mel Bartels Grinding Machines Mirror-o-matic Tom Waineo's Desktop Grinding/Polishing Machine Ken Lilja's Grinding Machine Grinding Machine Figuring Figuring a Paraboidal mirror by thermal ,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.
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 125 inch diameter, 15 inch thick, light-weight honeycomb-back telescope mirror blank that I made myselfRitchey 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 ObservatoryTelescope, Rough grinding powders for grinding mirrors to the required curve starting with flat (non diamond generated) mirror blank and grinding tool Three grades of coarse grinding powders are listed below , ( CATS) telescope making group Here is a link to the 'Sky at Night' magazine's Telscope Making Video by two members of CATSGrinding Machine for Large Telescope Mirrors, Grinding Machine for Large Telescope Mirrors I designed and built a grinding machine for mirrors up to 42 inches [11m] 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 ,Diy mirror grinding aspherical : telescopes, However, since grinding a giant 24" parabolic mirror just to cut out a few 8-10" segments is very time consuming and expensive, most people will just opt for the big 24" monolithic telescope.