Ritchey Telescope Mirror Grinding Machine

Replicating ritchey mirror grinding machine atm optics. mar 06 2006 replicating ritchey mirror grinding machine posted in atm optics and diy forum ive just returned from a few days with friends in washington dc being aviators and aircraft builders we blew a whole day at the new air space museums new annex at dulles really caught my attention however was that they moved the ritchey mirror ...

By september, 1907, the worlds largest telescope mirror was ready for its mount, but other equally large problems would cause further delays. to watch a short video of ritcheys grinding machine, now at the smithsonian, go here. the majority of the massive mounting and the steel for the dome was built by the union iron works in san ...

Everything was prepared for the arrival of the 9,000 pound slab of wine bottle glass. george ritchey, hales chief optician, began preliminary design work on the telescope for the estimation of costs, waiting until the 60-inch was tested before going into detail. the worlds largest grinding machine was built.

Grinding and polishing machines. tile grinding and polishing machines used by the writer are somewhat similar in principle to dr. drapers machine, sho.wn in fig. 25 of his book, but are more elaborate. i shall describe here the machine used in making the 5183foot mirror, both because it embodies most of the essential features of a-grindingand ...

Grinding a mirror quotfor 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 ...

Elgin-waineo machines . this is the most common type of machine at the moment, in industry as well as with amateurs, chiefly on the american continent see figure f.the main difference from the previous model lies in its single off-set arm 1 that oscillates around an axis 2 and is connected to a crank 4 and spindle 3 system which makes it work.

Mirror grinding machine g w ritchey - national air and . ... 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 ...

Jul 17, 2015nbsp018332at first glance, a ritchey-chr233tien rc telescope looks like a schmidt-cassegrain sct, but they are very different from one another optically. an sct uses a pair of spherical mirrors and a front corrector plate to banish spherical aberration the inability of a mirror to focus all the light from a

Mar 06, 2006nbsp018332replicating ritchey mirror grinding machine - posted in atm, optics and diy forum ive just returned from a few days with friends in washington, dc. being aviators and aircraft builders, we blew a whole day at the new air amp space museums new annex at dulles airport.what really caught my attention however, was that they moved the ritchey mirror making machine from the old paul

Optical features of this optical tube . . . ritchey-chr233tien optical design this astro-tech optical tube is a true ritchey-chr233tien r-c reflector optical system.unlike a maksutov-cassegrain or schmidt-cassegrain catadioptric scope that uses simple spherical mirrors and corrector lenses, or newtonian reflectors that use a coma-producing parabolic primary mirror, this astro-tech r-c is ...

In december 1945, work resumed on the mirror. in october 1947, it was pronounced finished and ready to install in the telescope. eleven and a half years had elapsed since the grinding machine started to work on the disc. shipping the mirror from pasadena to

X-ray telescope mirrors-materials manufacture tolerances and metrology. chat online 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.

Recently ive been trying to figure it using a polishinggrinding machine fabricated by the late bob bolster who modeled his after the machine that george ritchey invented for the celebrated 60 mirror at mount wilson over a century ago.

The 60-inch is a reflecting telescope built with ritcheychr233tien optics, that is, both primary and secondary mirrors have hyperbolic reflecting surfaces. this configuration provides a wide field of view and relatively good image definition within a compact designthe telescope tube

Skybadger - mirror grinding machine. the mirror machine came to me as a result of astronomical horse-trading, swapping a large gem mount and a 8quot newtonian ota for the machine as it was and a start kit consisting of two 6quot blanks and the grit, rouge and pitch to manufacture a mirror. the grinding machine had been built to the design of the ...

Astro-tel - mirror grinding machine - ray hall turbocharging. 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 quotaquot fig.3, page 163, quotamateur telescope makingquot book 1. a bowl which rotated was fitted to the spindle.

Mirror grinding mashine world cgm association. mirror grinding machine my mirror grinding machine. for a long time ive wanted to build a machine for grinding telescope mirrors. dennis rechs m-o-m designs finally inspired me to just get up and do it. over the years, id been collecting motors, gear boxes. get price

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

10quot ritchey chretien cassegrain atm project jump ahead to the mirrors the mechanical components aluminum coating the finished telescope adding a guide scope collimation rebuilding the mirror support. i had made newtonian telescope mirrors before ann two classical cassegrains of 8inch and 17.5inch aperture.

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 or for stroking . the machine can also smaller mirrors if the drip pan is moved to the fast shaft on

Grinding on the picture below the machine is fine grinding an 8 inch mirror with an 71 tool 143 mm diameter and 9 micron aluminium oxyde. the bent lines on the mirror are the effect of the tool turning - with respect to the mirror - faster at the central part of the mirror as compared to the edge zones.

The cassegrain telescope is probably the first type telescope that the atm would like to make after mastering the basic newtonian telescope. ... the ritchey chretien, on the other hand, has two hyperbolic mirrors so chosen that both spherical aberration and coma are corrected. ... this optic is small enough that a lens grinding machine ...

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. the grinding machine was moved to pasadena in 1904

Ritchey telescope mirror grinding machine. we are a high-end mining machinery manufacturer in asia. our products with superb technology and reasonable in price. the main production equipment includes crusher, sand making machine, ball mill, raymond mill, cement equipment and other products. our products are widely applied in industries such as ...

Ritchey wore many hats. he was an astronomer, a telescope designer, and an expert optician. he took the technology of mirror grinding to new levels of perfection such that his 60-inch mirror grinding machine now rests in the smithsonian. he is the r in the rc optics used in most large telescopes today, such as the hubble space telescope.

Mr. clean first, ritchey built a machine to grind and polish the glass mirror. the machine combined cast-iron grinding tools, water, and a new kind of grinding material called carborundum, which was almost as hard as diamond, to grind and polish the 60-inch glass disk.

Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze. unfortunately, it seems that, during his life, leonardo da vinci didnt actually build his invention, as he often did with other inventions.

Feb 10, 2013nbsp018332reason is because a ritchey chretien uses two hyperbolic surfaces and is a complicated optical design. spacing is critical. a newtonian is much simpler in optical design and uses only one parabolic surface and a flat secondary mirror. there is actually plenty of information on how to make a ritchey chretien.

Mirror grinding telescope 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 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