mirror grinding paraboloid
12 Inch Telescope Mirror BlankMirror Ideas
Apr 09 2020 · Mirror grinding 12 inch reflector telescope mirror blank 157 50 pic how i make telescope mirror blanks source for pyrex blanks atm optics and diy forum cloudy nights casting a large light weight telescope mirror from recycled glass calisphere 60 inch telescope mirror blank photographed in test Mirror Grinding 12 Inch Reflector Telescope Mirror Blank
Get PriceRotating furnaceWikipedia
A rotating furnace is a device for making solid objects which have concave surfaces that are segments of axially symmetrical paraboloids.Usually the objects are made of glass.The furnace makes use of the fact which was known already to Newton that the centrifugal-force-induced shape of the top surface of a spinning liquid is a concave paraboloid identical to the shape of a reflecting
Get PriceOff-Axis Paraboloid and Ellipsoid Mirrors Suppliers
The Photonics Buyers Guide is a comprehensive resource for verified providers of Off-Axis Paraboloid and Ellipsoid Mirrors. Profiles and contact information for manufacturers and suppliers are provided by the companies and verified by our editors. If you have updated information about any of the organizations listed please contact us.
Get PriceFoucault knife-edge testWikipedia
The Foucault knife-edge test is an optical test developed 150 years ago to accurately measure the shape of concave curved mirrors is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes uses a relatively simple inexpensive apparatus compared to other testing techniques.
Get PriceGSO Parabolic Primary Mirror6" f/8
GSO s parabolic primary mirrors are perfect for those who want to build their own telescopes or replace mirrors in older ones. Ranging in aperture from 6" to 16" and offered in various f-ratios these mirrors are made from optical grade BK-7 glass.
Get PriceFoucault knife-edge testWikipedia
The Foucault knife-edge test is an optical test developed 150 years ago to accurately measure the shape of concave curved mirrors is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes uses a relatively simple inexpensive apparatus compared to other testing techniques.
Get PriceGSO Parabolic Primary Mirror6" f/8
GSO s parabolic primary mirrors are perfect for those who want to build their own telescopes or replace mirrors in older ones. Ranging in aperture from 6" to 16" and offered in various f-ratios these mirrors are made from optical grade BK-7 glass.
Get PriceWooden Telescope Part 1 the Mirror 14 Steps (with
The polishing stage left us with a fully polished mirror with a nice spherical surface. However a sphere won t work for astronomical purposes. We need a paraboloid. The difference between a sphere and a paraboloid is small (order of 1 micron). To achieve this paraboloid we will use the Foucault tester.
Get PriceAn introduction to off-axis parabolic mirrors
An introduction to off-axis parabolic mirrors . OPTI 521 Tutorial . Written by Kevin Newman . Date October 21 2013 . 1. Abstract Off-axis parabolic mirrors (OAPs) can be a useful tool in optical design. OAPs combine the achromatic and diffraction limited imaging properties of a parabolic mirror with the ability to deviate the light path
Get PriceMirror grindingscope 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" mirror 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
Get PriceMaking your own telescope mirrorCosmoQuest
Rough-grinding a mirror blank to spherical shape is easy. I did it to an 8-inch blank. Fine grinding and polishing to a paraboloid is more difficult because you need to be careful to keep it even
Get PriceParabolic mirrorIndividual and custom-made
Depending on the material used both CNC technologies of grinding and polishing as well as diamond turning are used in the production of aspherical on- and off-axis mirrors as well as reflectors. The material is selected according to the customers needs with the range covering almost all types of glass e.g. fused silica as well as germanium silicon zerodur infrared glass and calcium
Get PriceopticsAstronomy Stack Exchange
Apparently there is a way of testing a convex mirror by making it from optical grade glass and testing it through the back. The refractive part of the light path creates a situation that if you test it as a sphere or paraboloid in that way (I forget which) the actual curve you get is a hyperboloid.
Get PriceObsession Telescopes / Optics
About our mirror suppliers. 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.
Get PriceHerb s 8-inch mirrorretrotechnology
Herb s 8-inch mirror. this Web page last updated in 2007 links refreshed 2017. He peaqued my interest in mirror grinding and in my old mirror. The computer says from the numbers it s an 1/11 wave sphere even 1/2 wave paraboloid May 2nd To The Parabola. The bottom line in going from a sphere to the correct parabola is in the numbers.
Get PriceTELESCOPE MIRROR MAKING HOW TO Fine GrindingYouTube
Apr 12 2020 · In this video I am showing you how to make a DIY telescope mirror This is the second part in the series showing fine grinding in a step by step tutorial.
Get PriceUnderstanding Foucault Harbour David A. 9781623740030
David A. Harbour presents a brilliant narrative for the Amateur Telescope Maker (ATM) on exactly how the "Foucault Test" is interpreted. Through a series of "foundation lessons" Mr. Harbour ensures the ATM understands what the Foucault Test is revealing and what to do about it as he figures the telescope mirror to achieve the perfect paraboloid.
Get PriceOpticsNorway s largest optical telescope
Fine grinding with a fixed-post grinding machine The fixed-post grinding machine is simple but effective. Exerting 0.75 horsepower it makes the grinding polishing and figuring of the 62 centimeter primary and 20 centimeter secondary mirror possible by smooth movement and even distribution of stresses over six 100 mm diameter Rollerblade© wheels.
Get PriceWould an amateur telescope maker be able to grind a mirror
Aug 28 2017 · The record for largest telescope made the same way amateurs use today goes to Ireland s Lord Rosse who in 1845 built a 72-inch-telescope. Mirror grinding How the Enormous Mirrors on the World s Largest Telescope Are Made Liquid mirror telescope -
Get PriceGrinding/polishing/figuring machine for large mirrors of
Along the axis the focus point of the desired paraboloid is rigidly located for regular use throughout the prolonged period of mirror making. By 4 carefully chosen random motions of the tool and the substrate it is possible to derive the desired paraboloid surface. The image at
Get PriceAn introduction to off-axis parabolic mirrors
An introduction to off-axis parabolic mirrors . OPTI 521 Tutorial . Written by Kevin Newman . Date October 21 2013 . 1. Abstract Off-axis parabolic mirrors (OAPs) can be a useful tool in optical design. OAPs combine the achromatic and diffraction limited imaging properties of a parabolic mirror with the ability to deviate the light path
Get PriceHOW TO MAKE A MIRROREl Camino College
HOW TO MAKE A MIRROR. Four stages of preparation are required before beginning to shape the mirror into a paraboloid. The purpose of the preparation is to make the surface of the mirror progressively smoother. During grinding silicon carbide (SiC) grit is used much in the same way as coarse sandpaper. Finer grains are used until SiC is
Get PriceObsession Telescopes / Optics
About our mirror suppliers. 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.
Get PriceJoy of Mirror Making Rough GrindingBBAstroDesigns
31 rows · Rough grinding a telescope mirror. The Joy of Mirror Making Mel Bartels But the shape
Get PriceTelescope Mirror Making Part 1YouTube
Jul 09 2012 · Part 1 of me grinding and polishing a 12.5 inch telescope mirror. I m using a home built fixed post or spin grinder.
Get PriceHow the Enormous Mirrors on the World s Largest Telescope
The mirror has that shape is because the entire 25 m telescope is a symmetric parabolic mirror—but the segments which are not in the center hence "off-axis"—are asymmetric pieces of that
Get Price- WOSWenk Observatory Solutions
After fine grinding the mirror has to be polished. The toolmade from plasteris the same as used for fine grinding but now carries a special polishing layer. As a last step it is necessary to change this spheroid to a paraboloidonly then a Newton delivers really optimal results
Get PricediagonalAstrosurf
It seems that even people making their own primary mirrors contend with buying diagonal mirror from commercial sources. Part of it may be that making a good diagonal is a more demanding job that grinding and polishing a lot larger paraboloid mirror which it will be used withdraw your own conclusions from it -)
Get PriceRotating furnaceWikipedia
A rotating furnace is a device for making solid objects which have concave surfaces that are segments of axially symmetrical paraboloids.Usually the objects are made of glass.The furnace makes use of the fact which was known already to Newton that the centrifugal-force-induced shape of the top surface of a spinning liquid is a concave paraboloid identical to the shape of a reflecting
Get PriceHerb s 8-inch mirrorretrotechnology
Herb s 8-inch mirror. this Web page last updated in 2007 links refreshed 2017. He peaqued my interest in mirror grinding and in my old mirror. The computer says from the numbers it s an 1/11 wave sphere even 1/2 wave paraboloid May 2nd To The Parabola. The bottom line in going from a sphere to the correct parabola is in the numbers.
Get PriceNotes from John Dobson s Telescope Making Class
Then fine grind the mirror blank with a succession of finer abrasives to get a smoother more precise curve and to get the mirror into the shape of a paraboloid. Use a pitch lap together with a fine polishing agent (cerium oxide) to polish and smooth the surface in preparation for an aluminum reflective coat.
Get PriceNotes from John Dobson s Telescope Making Class
Then fine grind the mirror blank with a succession of finer abrasives to get a smoother more precise curve and to get the mirror into the shape of a paraboloid. Use a pitch lap together with a fine polishing agent (cerium oxide) to polish and smooth the surface in preparation for an aluminum reflective coat.
Get PriceBuild your own telescope part 1 The mirrorThomas
A mirror is considered finished when the differences between its surface and the ideal paraboloid are less than 1/8 of the wavelength of green light (510 nm). This means that the peak to valley distance should be less than 64 nm.
Get PriceParabolic Mirror Grinding Machines Products Suppliers
Products/Services for Parabolic Mirror Grinding Machines. Grinders and Grinding Machines(970 companies) Grinders and grinding machines use an abrasive that is bonded to a wheel belt or disc to remove material and improve surface finish. Devices can be pneumatically driven or powered by a combustion engine or electric motor.
Get PriceFoucault knife-edge testWikipedia
The Foucault knife-edge test is an optical test developed 150 years ago to accurately measure the shape of concave curved mirrors is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes uses a relatively simple inexpensive apparatus compared to other testing techniques.
Get Price
- Coal Powder Processing
- Lime Industry
- Petroleum Coke Processing
- Ground Calcium Carbonate Processing
- Ceramic Raw Materials Processing
- Slag Processing
- Ground Calcium Carbonate(GCC)
- Limestone used in asphalt mixing plants
- Power Plant Desulfurization
- Highway Mineral Powder
Solutions
- MB5X Grinding Mill
- LUM Ultrafine Vertical Mill
- Hammer Mill
- Ball Mill
- MTM Series Trapezium Mill
- LM Vertical Roller Mill
- MTW Series Trapezium Mill
- SCM Series Ultrafine Mill
Products
- 7TPH Calcined Petroleum Coke Grinding Line
- 200,000TPY Limestone Grinding Line
- Shanxi 50,000TPY Bauxite Grinding Plant
- Jiangsu 100,000TPY Dolomite Grinding Plant
- Desulfurization agent production line in Inner Mongolia
- Limestone Grinding in Pakistan
- Dolomite Grinding with MTM160 in Indonesia
- MTM130 in Mexico
- Barite Powder Project with Capacity 60,000 per Year
- Calcite powder grinding with LUM Ultrafine Vertical Roller Mill
Project
- in the mine grinding process
- ball mill specifiions for gold in bolivia
- asia ball mill quary
- retsel mill stone over heating
- mineral grinding equipment manufacturer in trinidad and tobago
- concrete grinding attachment angle grinder
- machining center milling china
- professional grinding ball mill 18306400
- mica milling equipment manufacturer
- neiko tools rotary die grinder review
- iron ore carbide wet grinding ball mill manufacturer
- ball mill calculation pdf with peripheral discharge