Mirror Design For Optical Telescopes Springer

The reflector mirror is the most important component of an astronomical optical telescope This chapter provides At present three methods exist in aspherical mirror grinding and polishing The first one uses If the flat surface tool is replaced by a spherical one this planet polishing machine can be used for spherical nbsp

A history of polishing machines Astrosurf

As often in sciences and technology Leonardo da Vinci was a pioneer creating machines for the production of optical devices 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 nbsp

MoM Free Preview Mirror o matic com

Mirror o Maticwas designed to be a very low cost astronomical mirrorgrinding polishing and figuring machine Its attributes are 1 It can be built for somewherebetween 200 and 400 2 It is constructed of hardware store itemsand it needs no machinedparts 3 It is constructed primarilyof 3 4 inch plywood and has few nbsp

Static tool influence function for fabrication Semantic Scholar

7 Feb 2005 telescope 2003 http www astro lu se torben euro50 publications white book80 pdf 4 P Dierickx fabrication simulation of 2m class hexagonal mirror segments for extremely large telescopes 18 grinding and pre polishing machines for producing the input mirror surfaces of sub micron accuracy nbsp

Grinding Metre Scale Mirror Segments for the E ELT Ground Core

primary mirror being manufactured under contract for ESO Grinding has been carried out within the Loxham large optics aspherisation facility at Cranfield part of the Precision Engineering Centre The facility includes a BoX machine for grinding Leitz pmmf for large scale metrology reactive atom plasma RAP machine nbsp

Making A Mirror Grinding Tool Amateur Astronomers Inc

Making A Mirror Grinding Tool By Allen Malsburry The average person would never think I can make my own telescope Most amateur astronomers believe I can buy a better telescope than I can build Neither is actually correct For many decades now amateur astronomers have been building their own telescopes

Mechanic Lens Prism Grinding Directorate General of Training

Mechanic Lens Prism Grinding held at ATI Chennai SL NO NAME amp DESIGNATION REPRESENTING ORGANISATION REMARK 1 Shri A Mahendiran ATI Chennai Chairman 2 Shri S Harinath Babu Joint Director of Training ATI Chennai Member 3 Shri M Thamizharasan Dy Director of Training ATI Chennai

Lens amp Mirror Making Best lenses and mirrors are both made by

Grinding Motion Move mirror back and forth over tool amp grinding compound After number of strokes rotate mirror tool in opposite direction Change position of Grinding Machines Hand grinding takes several days Grinding machines designed to create exact same pattern Can adjust stroke positions etc – auto nbsp

Mirror grinding tutorial pdf Telescope making

13 Feb 2007 Mirror grinding tutorial How do you turn a chunk of glass into a telescope mirror with a surface accurate to a couple millionths of a millimeter And why do you wish to do so There are many reasons for grinding your own mirror Either you want a unusual size or focal length or to satisfy your curiosity or to nbsp

flex mirror cell Sky amp Telescope

been taught to proceed by first grinding and polishing a Telescope Mirrors If you can grind and polish a sphere you can make a telescope mirror that will leave nothing to be desired By Alan Adler Above Flex cell for the author 39 s 8 inch f 6 telescope Compared to the mirror made by a highly regarded custom maker

Machining High Precision Mirrors Using Newly Developed CNC

Grinding Machine tool Form accuracy 1 Introduction Development of equipment incorporating optical technologies is in full swing Applications include information equipment laser machining equipment exposure equipment and space observation units Development of optics such as curved mirrors and aspheric nbsp

Development of Metallographic Specimen Polishing Machine PDF

Full text PDF One of the most useful pieces of equipment for the grinding and polishing metallic materials in order to determine their physical structure us metallographic determination and also to design and construct a machine using locally available materials to produce a flat smooth and mirror like surface of any nbsp

Hubble Error Time Money and Millionths of an inch Tamu edu

roughly by machine then polished to their final form by opticians whose work fell somewhere One spring day in 1979 an inspector halted the grinding mirror 39 s performance However the Teacup Affair had cost Rigby another six weeks A year had been allowed for the rough grinding in Wilton The mirror had been nbsp

Mirror mirror symmetry magazine

12 Jan 2015 Once the baking was done the grinding and polishing began A special machine shaved and sanded away layers of glass including several tons from the center to form M3 in a process that removed millimeters and then nanometers at a time The shape of this mirror has to be good to small fractions of nbsp

Grinding Machine for Large Telescope Mirrors

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 see pdf paint brilliant star yellow analysis Hindle Zeiss style 25 quot stroke polishing should move no faster than one stroke every 4 seconds or 15 rpm need 34 5 15 nbsp

Fabrication of large secondary mirrors for astronomical telescopes

Lab that integrates a 1 8 m stressed lap polishing machine with interferometric and mechanical measuring systems This Then we grind the aspheric departure into the surface with loose abrasives guided by measurements from our swing arm profilometer We finish the mirrors using the stressed lap polisher guided by nbsp

Glass and Glazing Glossary of Terms GGI

5 Mar 2015 Edge Polishing – To machine the edge of the glass to produce a high polish with a flat edge and two arisses Fabrication – Manufacturing process in which an item is made fabricated from raw or semi finished materials instead of being assembled from scratch Edging – Machine grinding the edges of nbsp

OSA Ductile mode grinding of reaction bonded silicon carbide mirrors

The demand for reaction bonded silicon carbide RB SiC mirrors has escalated recently with the rapid development of space optical remote sensors used in astronomy or Earth observation However RB SiC is difficult to machine due to its high hardness This study intends to perform ductile mode grinding to RB SiC nbsp

glass machinery C R Laurence

CRL Glass Machinery craftsmen with an average 25 years experience fabricate and assemble the full line of CRL Abrasive Belt Sanders the same way it 39 s been done since 1935 The new generation of Upright Abrasive Belt Sanders is the product of continued refinement featuring improvements in safety and efficient nbsp

Mirror Making Strokes WordPress com

The principle mirror making strokes starting with full sized tool or lap are described below It is important to realise that these strokes can be used both in grinding with a tile and cement tool or similar and Sub diameter tools and laps are very useful to the telescope mirror maker with such tools or laps the mirror is always nbsp

Development of SiC Ultra Light Mirror for Large Space Telescope

candidate as hopeful material for segmented mirrors of the next generation ground based telescopes from 20 to 100 m in diameter However an SiC mirror is difficult to shape because the material is very hard and brittle We are developing an SiC mirror by means of a ultra precision rotary grinding machine 800 mm in nbsp

Jan van Gastel Making a mirror o matic mirror making machine

Building a Mirror O Matic mirror making machine Once I had seen a grinding machine working at 380 Volts and weighting about 300 kilo 39 s but this one looked quite different lightweight very compact and working on The pdf files of the examples can be found in the files section of the Zambuto mirror yahoogroup

advances in precision grinding eBooks Universitas Narotama

4 1 In precision contour grinding machine tool motions are controlled as in diamond turning The position Some other applications are in abrasive cut off of ceramics 44 mirror surface grinding of silicon wafers 40 Online available at www iop org EJ article 0034 4885 53 8 002 rpv53i8p1049 pdf 5 Lindberg R A nbsp

DATSCOPE Telescope mirror grinding machine

New grinding machine The new grinding machine is being used to re make the old TRO 30 inch mirror and the three 20 inch mirrors It will be capable of making a planned 1M telescope in the near future TRO 30inch machine 1 jpg Original 30 inch TROK grinding machine TROK webimages 018 jpg Link to the nbsp

Ductile or Partial Ductile Mode Machining of Brittle Materials

Keywords Brittle materials Ductile streaks Mirrors Partial grinding wheel 14 When ductile mode machining of brittle materials is achieved nanometre order surface roughness is obtained and subsurface damage approaches zero Ductile and brittle ZrO2 and Al2O3 were ground on a surface grinding machine

The venerable craft of telescope mirror grinding takes on a Mosaic

telescope mirror above to the testing of its ground polished and pansion have been the telescope maker 39 s quest ever since glass first Tololo mirrors and then polishing the edge Next the back of the mirror blank is ground flat This rough grinding process takes about two months and is not highly critical because the nbsp

Ultraprecision grinding of tungsten carbide for spherical mirrors

Abstract This paper reports the ultraprecision grinding of tungsten carbide for spherical mirrors with nanometre surface roughness and submicron form accuracy Spherical grinding was conducted with a computer numerical control grinding machine using a metal bond diamond tool with grit size of 15 μm Form accuracy nbsp

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