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mirror grinding paraboloid

mirror grinding paraboloid

Amirroris considered finished when the differences between its surface and the idealparaboloidare less than 1/8 of the wavelength ofgreenlight (510 nm). This means that the peak to valley distance should be less than 64 nm. While this is not the only test nor the most accurate, it is a good indicator of the overall quality of amirror

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We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other beneficiation equipment; Powder Grinding Plant, rotary dryer, briquette machine, mining, metallurgy and other related equipment.If you are interested in our products or want to visit the nearby production site, you can click the button to consult us.
  • hexagonal parabolic mirror - diy possible? - atm, optics

    hexagonal parabolic mirror - diy possible? - atm, optics

    May 26, 2005· If you mean hexagonalmirrorseach ground to form part of aparaboloid, then yes, it's possible. But it's just as much work asgrindinga single-piecemirror. More work, in fact, if you consider the difficulty of aligning themirrorsto sub-micron precision and maintaining that alignment

  • www.jeffbaldwin.org

    www.jeffbaldwin.org

    Forparabolizing, you can rotate themirrorand push strokes using a 33% sub-diameter lap, or you can use an Elgin machine to stroke a 50% star tool close to over center. Tweaking will occur, people have their favorite rhythms and strokes, but the goal is the same; make aparaboloid

  • how to make your own telescope mirror - instructables

    how to make your own telescope mirror - instructables

    How to Make Your Own TelescopeMirror: [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make themirror. Cutting it into smaller sections can be difficult but scoring it with a glass cutter and tapping the…

  • telescope mirrors - orion optics

    telescope mirrors - orion optics

    TelescopeMIrrorSets to purchase online. 4 Grades available: Standard, Professional, Research and Ultra. World class optics

  • stressedmirrorpolishing. 2: fabrication of an off-axis

    stressedmirrorpolishing. 2: fabrication of an off-axis

    Jul 15, 1980· A mirror has been fabricated with the shape of an off-axis section of a paraboloid by grinding and polishing a sphere into a prestressed blank. The applied stresses were then removed allowing the mirror to spring into the desired paraboloidal shape. The 36-cm diam off-axis section deviated 9.9-microm rms from the polished sphere

  • parabolic mirror- individual and custom-made

    parabolic mirror- individual and custom-made

    Depending on the material used, both CNC technologies ofgrindingand polishing, as well as diamond turning, are used in the production of aspherical on- and off-axismirrorsas 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

  • parabolic mirror grinding machines| products & suppliers

    parabolic mirror grinding machines| products & suppliers

    Products/Services for Parabolic Mirror Grinding Machines Grinders and Grinding Machines - (983 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

  • optics - is it practical to hand grind a convex parabolic

    optics - is it practical to hand grind a convex parabolic

    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

  • parabolic mirror: working, principle, and applications

    parabolic mirror: working, principle, and applications

    Parabolic Mirror: Principle.Parabolic mirrorswork on the principle of the mathematical concept of a 2D parabola. Its 3D version/form is called aparaboloid. Colloquially, these two terms are often used interchangeably. Aparaboloidis a quadratic surface that is a three-dimensional rendering of a parabola

  • hexagonal parabolic mirror - diy possible? - atm, optics

    hexagonal parabolic mirror - diy possible? - atm, optics

    May 26, 2005· If you mean hexagonal mirrors each ground to form part of a paraboloid, then yes, it's possible. But it's just as much work as grinding a single-piece mirror. More work, in fact, if you consider the difficulty of aligning the mirrors to sub-micron precision and maintaining that alignment

  • www.jeffbaldwin.org

    www.jeffbaldwin.org

    For parabolizing, you can rotate the mirror and push strokes using a 33% sub-diameter lap, or you can use an Elgin machine to stroke a 50% star tool close to over center. Tweaking will occur, people have their favorite rhythms and strokes, but the goal is the same; make a paraboloid

  • gso parabolic primarymirror- 6

    gso parabolic primarymirror- 6" f/8

    Most parabolic mirrors will have 2-4 minor uncoated areas along the edge of the mirror. See photo 2 above for an example. These are caused by the clips used to hold the mirrors in the coating chamber. Note that these are not defects

  • telescope mirrors- orion optics

    telescope mirrors- orion optics

    TelescopeMIrrorSets to purchase online. 4 Grades available: Standard, Professional, Research and Ultra. World class optics

  • osa | stressedmirrorpolishing. 2: fabrication of an off

    osa | stressedmirrorpolishing. 2: fabrication of an off

    Amirrorhas been fabricated with the shape of an off-axis section of a paraboloidbygrindingand polishing a sphere into a prestressed blank. The applied stresses were then removed allowing themirrorto spring into the desired paraboloidal shape. The 36-cm diam off-axis section deviated 9.9-μm rms from the polished sphere. The final surface deviated 0.03-μm rms from the desired off-axis

  • making your own telescope mirror- cosmoquest

    making your own telescope mirror- cosmoquest

    The paraboloid shape is needed to give crisp images even at the center of the field; otherwise light from all parts of the mirror doesn't come to a focus at the same location even for a single star at the center (the technical term for this is spherical aberration, which many people will shudder at the memory of from the early days of Hubble)

  • experimental and numerical simulation studyon gas jet

    experimental and numerical simulation studyon gas jet

    Apr 01, 2020· 1. Introduction. Themirrorblank is mainly used as the substrate for opticalmirrorcoating. The shape precision and surface quality of themirrorblank determine the optical performance of the coatedmirror[1,2].The processing of the opticalmirrorblank is mainly based on the technology of material removal forming, compression moulding and spin-casting

  • wooden telescope part 1: themirror: 14 steps (with

    wooden telescope part 1: themirror: 14 steps (with

    The polishing stage left us with a fully polishedmirrorwith a nice spherical surface. However, a sphere won't work for astronomical purposes. We need aparaboloid. The difference between a sphere and aparaboloidis small (order of 1 micron). To achieve thisparaboloid, we will use the Foucault tester

  • a method for manufacturing parabolic mirrors- sciencedirect

    a method for manufacturing parabolic mirrors- sciencedirect

    This produced a thin-walledparaboloidwith amirrorsurface on both sides. The use of fiberglass reinforcement with this system would appear to present no great dif- ficulty. While epoxy resins are characterized by a relatively low shrinkage of 3-4 per cent compared to 10-12 per cent for the polyester resins, the actual shrinkage does not

  • - wos - wenk observatory solutions

    - wos - wenk observatory solutions

    After finegrinding, themirrorhas to be polished. The tool - made from plaster - is the same as used for finegrindingbut now carries a special polishing layer. ... As a last step it is necessary to change this spheroid to aparaboloid- only then a 'Newton' delivers really optimal results!

  • osa | stressedmirrorpolishing. 2: fabrication of an off

    osa | stressedmirrorpolishing. 2: fabrication of an off

    Amirrorhas been fabricated with the shape of an off-axis section of a paraboloidbygrindingand polishing a sphere into a prestressed blank. The applied stresses were then removed allowing themirrorto spring into the desired paraboloidal shape. The 36-cm diam off-axis section deviated 9.9-μm rms from the polished sphere. The final surface deviated 0.03-μm rms from the desired off-axis

  • grinding/polishing/figuring machine for largemirrorsof

    grinding/polishing/figuring machine for largemirrorsof

    A 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 aparaboloid mirrorwith a graze angle close to half degree and with 0.1 arc sec tolerance. For a reasonable plate scale, the cross sectional radius of theparaboloidshould be about 5 - 10

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