how to make a telescope mirror grinding machine

Crushing Equipment&Grinding Equipment

Prepping to Grind

Finally work as slowed down just enough that I could slip away on Tuesday (10/29) to check in at the mirror grinding workshop. I brought my blank along. I consulted about how to start, and as a result I decided I should build a box to store the mirror and tool in and

Fabrication of GSMT Optics

Fabrication of GSMT Optics: NIO-RPT-002 7 suppliers in a year. Therefore, a significant expansion of production would be required to deliver all the segment blanks over a period of just a few years, though this is not expected to pose a problem. The polishers all

Grinding,Polishing and Figuring

Fine grinding: I change from my rough grinding area to my fine grinding and polishing area after 220, not before. #220 is still gritty stuff. The W stroke: This is a casual way of describing any stroke that goes forward and backward while progressing left to right or right to left on the mirror.

Foucault test

The combination of simplicity and accuracy has made it the single most used test in the amateur telescope makers' circles. FIGURE 52 : The principle of the Foucault test. Light reflected from mirror surface carries the information on geometric properties of the reflecting surface: if it is perfect spherical, the light from the entire surface will converge to a single aberration-free focus.

NASA

This telescope will be constructed using the same lenses that were used in the experiment named, Focusing Light With a Lens, page 49 in the Educator Guide: Optics - Light, Color and their Uses. 1. The mailing tubes will be the body of the telescope with the smaller one sliding inside the larger one.

Amateur Telescope Making Supplies

Add to Cart. $19.95. Summary. Details. A spherometer is a tool used to measure spherical curvatures. They work great for measuring the radius of curvature (ROC) of your mirror as you progress through the grinding process, allowing you to determine if your ROC is getting longer or shorter. You can also use one to measure the radius of curvature

How to Build an 80

2016/1/15Here at the Mirror Lab, we finished making the first Giant Magellan Telescope segment in 2012. After a pause for work on two other mirrors, the lab is in the process of grinding Segments 2 and 3.

Jan van Gastel: Making a mirror

After having made five mirrors by hand, I decided to build a mirror making machine. I did a google search and arrived soon on Dennis Rech's 'Mirror-O-Matic' pages. Just what I was looking for! Once I had seen a grinding machine, working at 380 Volts and

Freeware from Sky Telescope

2005/9/22In the Telescope Techniques department in the July 2002 issue of Sky Telescope (PDF of article) Glenn LeDrew showed how to make a pair of right-angle, correct-view binoculars. The article features a DOS program called Binoplan that calculates the spacing of the various optical elements and shows on-axis and off-axis vignetting.

Mirror

Mirror-0-Matic 20. Ordering Information August 2012 Parts List. The Mirror-o-Matic 20 is my response to the many requests for a larger version of the original Mirror-o-Matic. It has been designed to fabricate concave mirrors up to 17.5 inches. There is room to expand the turntable up to 24 inches so that 20 inch mirrors can be accommodated.

ELID grinding of SiC ultra lightweight mirror

Silicon carbide (SiC) is the most advantageous as the material of various telescope mirrors, because SiC has high stiffness, high thermal conductivity, low thermal expansion and low density and so on [1] [2]. However, since SiC is very hard, it is difficult to obtain the surfaces efficiently by using ordinary grinding method. Therefore, we developed the ultra lightweight mirror by ELID

King Telescopes, telescope mirror blanks, using both quartz or

Welcome to King Telescopes Not an impressive website. However, we are not in this for a profit. Our intent is to provide a source for lower cost, mirror blanks, and supplies for grinding your own telescope mirror. If I had known as a kid how, well not easy, but indeed

Telescope Mirror Making

That way, if you scratch the mirror and have to go back to grinding, you don't have to scrape off all that pitch and make a new pitch lap when you are ready for polishing again. Others have claimed that hogging out with a smaller tool, such as a galvanized pipe end cap, is faster than using your full-diameter tool for hogging out.

Mirror Grinding Machines

Howdy, I am going to be joining the ranks of retired people on 12/31,and I am thinking about grinding another mirror. My first mirror is an 8/f5 that was done by hand. Since then I had to have surgery on my right shoulder,so I am wanting to build a grinding machine.

An Introduction to the Optics Manufacturing Process

2008/10/31An Introduction to the Optics Manufacturing Process Katie Schwertz OptoMechanics (OPTI 521) Report October 31, 2008 Abstract Although technological advances are continually being made in machinery for optics manufacturing, the actual manufacturing process

Fabrication of a grazing incidence telescope by grinding and

1991/1/1Fabrication of a grazing incidence telescope by grinding and polishing techniques on aluminum The paper describes the fabrication processes, by grinding and polishing, used in making the mirrors for a f/2.8 Wolter type-I grazing incidence telescope at Boulder (Colorado), together with testing procedure used to determine the quality of the images.

Casting a Large, Light

Casting a Large, Light-Weight Telescope Mirror From Recycled Glass: The first photo below shows a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank, made from recycled glass, that has been lightened by casting the mirror in a mold that made lots of

Find a Telescope Workshop to Watch the Skies DIY Style

2017/7/27Make Your Own Masterpiece. Held every Friday night at Oakland, California's Chabot Space and Science Center, the Telescope Makers' Workshop is an informal gathering where you can learn how to grind and polish a high-quality Newtonian telescope mirror and, hopefully, turn it into your own masterpiece of optics, woodcraft, and design.

Why are telescope mirrors made of glass?

Optical telescope mirrors are typically made from endlessly polished glass surfaces that have been aluminised to provide a very smooth surface of reflective aluminium. But why the need for glass at all? Why can't mirrors be made of pure metal, or of metal deposited

Parabolic mirrors – Precision made with German Engineering

Whether you are looking for components for telescopes or measuring technology, asphericon offers complex solutions and the highest precision from a single source. Starting with optical design and the production of your parabolic mirror, asphericon also produce coated elements, such as dielectric mirrors for single wavelengths, two wavelengths and the entire bandwidth as well as metallic mirror

Spray Silvering Telescope Mirrors

2019/9/24If you've never made a mirror or stripped an old coating before, this step will probably give you pause. "Telescope mirrors are delicate, precision optics and shouldn't be touched!" Mostly yes, but sometimes it's not only ok, it's the only way to proceed.

Hubble's Mirror Flaw

2019/11/25The result was a mirror with an aberration one-50th the thickness of a human hair, in the grinding of the mirror. Replacing the mirror was not practical, so the best solution was to build replacement instruments that fixed the flaw much the same way a pair of glasses correct the vision of a near-sighted person.

How to Build an 80

2016/1/15Here at the Mirror Lab, we finished making the first Giant Magellan Telescope segment in 2012. After a pause for work on two other mirrors, the lab is

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

A Beginner's Guide to Collimation

2012/11/28Just kidding! I wanted to see if you were paying attention. Collimation is a 3-step process. Step #1 is to roughly align the primary mirror. Step #2 is to position the secondary mirror. Finally, step #3 is to fine-tune the alignment of the primary. Most nights, step #3 is the only one you'll have to perform.

Dick Parker's Telescope Mirror Workshop: Refractor Telescope

Making the Lens Making the lens is similar to making a mirror. There are two glass elements therefore 4 surfaces to make, however the glass works faster than pyrex and all the surfaces are spherical. Since the lens elements are relatively thin

Mirror, mirror

After more than six years of grinding and polishing, the first-ever dual-surface mirror for a major telescope is complete. In March 2008, a group of people gathered around a giant, red oven in a six-story workshop space beneath the bleachers of the University of Arizona football stadium.

THE PROCESS OF MAKING A MIRROR

The mirrors start out from Schott Supremax 33 borosilicate (precision annealed) blanks. They are places in Strasbaugh grinding/polishing machines. Each machine pictured can hold up to a 28 mirror and another machine that I have (not pictured can hold up to a 32 mirror).

Grinding/polishing/figuring machine for large mirrors of milliarcsecond x

1994/6/1A milliarcsecond x-ray telescope can image stars and can observe galaxies with resolution matching radio astronomy--opening the door to fundamental discoveries. The convenient milliarcsecond x-ray optic is a paraboloid mirror with a graze angle close to half degree and with 0.1 arc sec tolerance. For a reasonable plate scale, the cross sectional radius

DIY Telescope Courtesy Of IKEA

2021/3/12What serious mirror grinders do is build themselves "machines" that do a significant amount of the deep grinding, leaving the fine

Strasbaugh polishing and grinding machine

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.

Grinding,Polishing and Figuring

Fine grinding: I change from my rough grinding area to my fine grinding and polishing area after 220, not before. #220 is still gritty stuff. The W stroke: This is a casual way of describing any stroke that goes forward and backward while progressing left

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