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.
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 of the same type.
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.
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 ...
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 f1.5 f1.75.
Mar 06, 2006 Making a homemade mirror grinding machine - posted in ATM, Optics and DIY Forum I want to make a motorized mirror grinder , any good info on this , i have a couple geared motors , low speed high torque. One more question ...will 1 12 shaft size pillow block bearings work good for a homemade EQ mount Thank you , John
Nov 16, 2018 Types of mirror grinding machines - posted in ATM, Optics and DIY Forum Hi to all, I am planning to make a mirror grinding and polishing machine but i have limited knowledge about these machines. Because of this i have some questions to someone who has some experience with those machines - Some machines have fixed supportes and some of them have a prestaltic moving arm,
Oct 15, 2012 Page 1 of 2 - Making my own fixed post mirror grindingpolishing machine - posted in ATM, Optics and DIY Forum Hey guys. Im thinking of making my own fixed post mirror grindingpolishing and curve generating machine. Ive got loads of questions regarding the design so Ill just start firing away Do I need an eccentric moving tool to be able to polish a mirror spherical
Mar 04, 2021 Up for sale is my telescope mirror grinding machine pottery wheel. I used this machine to grind a telescope mirror and it worked great. No more walking around the barrel. Could be adapted with an overarm for a fully automated grinding machine. 125 shipped to CONUSA. Includes 3D printed mirror holder mirror blank not included as seen in ...
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 15. X-Ray Telescope Mirrors-Materials, Manufacture, Tolerances And Metrology
100- inch telescope mirror on grinding machine, at Mount Wilson Observatorys Pasadena laboratory.Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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 ...
Currently manufacturing a 16 diameter 1 thick plate glass f3.88 Newtonian telescope mirror. Doing this with my new fixed post grinding machine built this summer. Work is progressing well, and very efficient. Started project in August 2013 and at this point I am ready to move on from 25 micron White Aluminum Oxide to 9 micon White Aluminum ...
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 solo.
The I.A.U. named asteroid 17823 Bartels discovered 1998 by J.M.Roe 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 tools.
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
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
want to learn more about Newtonian telescopes the internet is replete with information about all types of telescopes. Typically, the primary mirror is made of glass. Pyrex is commonly used for the primary mirror because of its thermal stability, but for small mirrors, plate glass will work fine too. Telescope mirrors are relatively thick.