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  • Telescope Mirror Grinding Machine Products &

    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 [14]. Fast figuring of large optics by reactive atom plasma

    Grinding Machine for Large Telescope Mirrors

    2020-11-1 · Can be configured for spin or stroke work. 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

    Mirror Grinding Machine, G. W. Ritchey National Air

    2021-1-11 · 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.

    Astro-Tel Mirror grinding machine

    2001-4-12 · 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

    GrindingPolishingMachine LCAO

    The machine must fullfill the following needs: It must be as compact as possible. Must be able to grind and polish mirror of up to 76 cm. The grinding table must be able to swing from horizontal to vertical in order to test the mirror. During testing the mirror will be supported in a sling. Must be able to cut new mirror blanks from glass. A crane is needed to move the larger mirrors when finished.

    Mirror-o-Matic mirror making machine ATM pages

    2018-5-16 · The M-o-M is a marvellous machine due to its simplicity and yet refined design. It is extremely flexible accommodating mirror sizes from 4 inch up to 20 inch (with slight modifications) and can be used for all three steps necessary in producing a

    Types of mirror grinding machines ATM, Optics and

    2018-11-16 · Uğur İkizler is a telescope maker in Bursa, and has made telescopes and a machine. I'm sure either of these telescope makers would help you to learn about making optics. There are others in Turkey also. Usually the same machine is used for grinding, polishing, and figuring. Types of machines: astrosurf...es-type-eng.htm

    Making mirrors for giant telescopes SPIE Digital Library

    The Starfire project provided much of the funding for a new polishing lab built in 1990 and equipped with an 8 m grinding and polishing machine and a 24 m test tower, which were first used to figure the 3.5 m mirrors. The Mirror Lab was not free to choose the focal ratios, so these mirrors were more conservative at

    Mirror grinding Telescope making

    2007-2-13 · 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

    Mirror Grinding Machine, G. W. Ritchey National Air

    2021-1-11 · 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.

    Astro-Tel Mirror grinding machine

    2001-4-12 · 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

    100-inch telescope mirror on grinding machine —

    100-inch telescope mirror on grinding machine at Mount Wilson Observatory's Pasadena laboratory.Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.

    GrindingPolishingMachine LCAO

    Telescope Making. Telescope Mirror Grinding and Polishing Machine. After I had made the 41-cm telescope mirror by hand I had decided that I needed a grinding and polishing machine for the bigger mirrors I wanted to make. Specification. The machine must fullfill the following needs: It must be as compact as possible.

    Mirror grinding Telescope making

    2007-2-13 · 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

    Mirror-o-Matic mirror making machine ATM pages

    2018-5-16 · 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.

    Newport Glass Works, LTD. Grinding, Polishing and

    2014-7-21 · There are several ways to support the mirror on a grinding and polishing machine turntable, but first make sure the turntable itself is rigid. It must not bend. If your machine lacks a sturdy turntable, one way to make one is to cast it out of Kerr plaster 4" to 5" thick.

    Amateur Telescope Making Main Page Stellafane

    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

    Mike's Telescope Workshop mdpub

    2021-2-24 · I finally decided it was time to build a machine to help me grind the edges of the blanks true and round. 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.

    Stellafane ATM:Mirror Making Myths

    With the Mirror on top, the tool on the bottom, and coarse grit in between, we start grinding with the mirror overhanging the tool. We rub the center of mirror against the edge of the tool, and this wears a depression in the center of the mirror (the edge of the tool wears down also, so that the tool becomes convex (a "hill" in the center) and

    Mirror Grinding Machine, G. W. Ritchey National Air

    2021-1-11 · 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 Mirror Grinding Machine Plans

    telescope mirror grinding machine plans Grinding Mill China The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. We plan to help you meet your needs with our equipment, with our distribution and product support system, and the continual introduction and updating of products. get price

    Mirror Grinding Machine Hackaday

    2006-9-26 · 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.

    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

    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

    Newport Glass Works, LTD. Grinding, Polishing and

    2014-7-21 · There are several ways to support the mirror on a grinding and polishing machine turntable, but first make sure the turntable itself is rigid. It must not bend. If your machine lacks a sturdy turntable, one way to make one is to cast it out of Kerr plaster 4" to 5" thick.

    jeffbaldwin.org

    2015-9-7 · 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.

    Stellafane ATM:Mirror Making Myths

    With the Mirror on top, the tool on the bottom, and coarse grit in between, we start grinding with the mirror overhanging the tool. We rub the center of mirror against the edge of the tool, and this wears a depression in the center of the mirror (the edge of the tool wears down also, so that the tool becomes convex (a "hill" in the center) and

    Mike's Telescope Workshop mdpub

    2021-2-24 · I finally decided it was time to build a machine to help me grind the edges of the blanks true and round. 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.

    Telescope Making Supplies willbell

    2020-7-29 · 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 needed.

    Telescope Mirror Grinding Machine Plans

    telescope mirror grinding machine plans Grinding Mill China The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. We plan to help you meet your needs with our equipment, with our distribution and product support system, and the continual introduction and updating of products. get price

    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

    - WOS Wenk Observatory Solutions

    2020-7-24 · making a 14" parabolic mirror. A way to achieve this, is hiding the mirror behind so called zone masks that only have apertures for specific and well defined concentric zones. It is then possible to determine the Radius of Curvature (ROC) of the actually 'open' zone. Working through all zones defined, we get a sample of different ROCs that define the actual geometry of the mirror-surface.

    Mirror grinding Telescope making

    2007-2-13 · 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

    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

    Mirror-O-Matic Dr. Debug

    2009-10-17 · Mirror grinding an polishing maching Mirror-O-Matic. Click on any picture for a larger version: Mirror-O-Matic Overview. When I started into astronomy back in the late fall of 1999 I had purchased my 1st telescope.

    The shaping and testing of two 20” optical telescope

    2017-4-30 · Grinding and polishing machine • Based largely on the principles of a machine described by John Hindle in Amateur Telescope Making volume 3 Chapter A. 2. • Mirror free floating on top of the tool, inside a holding cradle (crocodile) allowing the mirror to rotate freely without undue pressure and so avoiding any astigmatism.

    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.

    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 Makers Workshop‘s classes on Friday nights in Oakland.

    Amateur Telescope Making Main Page Stellafane

    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