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grinding thin telescope mirror

Shaping the Mirror for Grinding Preparations - Stockton ...

We call this astigmatism, and it is the most easily seen image-ruining aberration in large, fast, thin telescope mirrors today. (If you don't believe me, go look...

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tut44 Making A Mirror Grinding Tool.pdf - Amateur Astronomers, Inc. pdf

times better than the average mirror found in an imported telescope of the same size. .... There may be a very thin film of plaster over some the tile faces, this will...

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Grinding with thin telescope mirror kits - Telescope Mirror Making Kits

Thin glass grinding differs slightly from "standard" mirror making practices. Keep these principals in mind when using your thin mirror kit and you'll be fine. Also...

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Telescope Mirror Blanks|Make It With Quartz|Page 2

As with other substrates, a thin mirror blank of quartz is not the best choice if you ... grinding mirrors and want to make a high quality, lightweight mirror, quartz is...

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Has anyone considered making a telescope mirror by evacuating a ...

The time to grind the mirrors to the proper shape could be reduced significantly, .... If you put the mylar across a liquid surface. put a clear epoxy as a thin film and...

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Making a Mirror. - Bob May's Astronomy Site.

So you really want to build a Telescope Mirror. Here's another way to do .... You can stop grinding at any point and put more chamfer on if it gets thin at any point.

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Lightweight Mirror Developments - Inaf pdf

mirror telescope configurations are being considered. Thin meniscus mirrors are being slumped, and approaches for actively correcting these ... not require optical grinding or figuring during production, are being evaluated. Finally, spin-cast...

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Thin Telescope Mirror Grinding Advice

Tips on grinding thin telescope mirrors using thin plate glass mirror blanks.

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Portholes and Plate Glass - Sidewalk Astronomers

Occasionally, we feel called upon to justify the fact that we grind portholes of plate glass and ... 1) Plate glass mirrors are said to be harder to figure because of thermal ... are said to be too thin and therefore subject to bending in the telescope.

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Telescope mirrors successfully lose weight - Laser Focus World

The drive to reduce telescope mirror weight is directly linked to the fact that the weight ... The first step in the optical replication process is to grind and polish a glass .... To overcome print-through of the graphite fibers, a very thin layer of resin is...

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grinding, polishing and figuring - thin telescope mirror: part i

Grinding, Polishing and Figuring. Thin Telescope Mirrors. Abridged from an article appearing in Telescope Making #12. Provided: Courtesy of Astronomy...

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Mirror image letters generator

7 Nov 2015 ... Grinding, Polishing and Figuring . Thin Telescope Mirrors . Abridged from an article appearing in Telescope Making #12 Provided: Courtesy of...

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Mirror grinding - Scope Making

telescope making, mirror grinding, homemade tripod, eyepieces, astronomy.

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Primary Mirror - The James Webb Space Telescope - NASA

If the Hubble Space Telescope's 2.4 meter mirror were scaled to be large .... the back side of the beryllium mirror blank, leaving just a thin "rib" structure. ... SSG/Tinsley started by grinding down the surface of each mirror close to its final shape.

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Large Thin Mirror Making Why grind a large thin mirror?

A large thin mirror dobsonian can be made for a very reasonable cost and is ... April 1996, Sky and Telescope magazine starting on page 75 carries an article by...

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Mike's Mirror Making Musings - Lockwood Custom Optics

If your mirror is at all thin for its size, grinding the back of the mirror is just as important as grinding the front! If the back is not flat, the mirror will warp during...

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How I Make Light-Weight Hexagon or Honeycomb Telescope Mirror ...

This is a photo of a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank that ... with making my own telescope mirror blanks by fusing together disks of thin glass .... Rough grinding is complete for the 12.5 inch honeycomb-back telescope...

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Making Thin Mirrors for Reflecting Telescopes

MAKING THIN MIRRORS FOR REFLECTING TELESCOPES By HAROLD C. ... being thin, it was warped in the grinding and polishing process, and when it was...

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Large Homemade Telescope Making Project - Google Sites

DIY Mirror Grinding and Telescope Making ... a challenge (a thin mirror can end up being astigmatic if you are not careful during grinding, while parabolizing and...

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Telescope Making - Wikibooks, open books for an open world

[edit]. You need a tool base, cast or shaped, carved or whatever and some glue to attach the grinding surface...

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Thin mirror making drip system + avoiding astigmatism - YouTube

21 Jan 2010 ... This is a 18mm thick quartz mirror, diameter 37,5cm. ... Homemade polishing machine,Grinding 10" pyrex telescope mirror - Duration: 4:29. by...

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Ultra-Thin Highly Deformable Composite Mirrors - Space Structures ... pdf

primary mirror, made by grinding and polishing a “blank” of near-zero ... mirrors for the Autonomous Assembly of a Reconfigurable Space Telescope (AAReST).

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How to Build a Telescope ? - iucaa

Once the rough grinding has been completed the mirror, tool, work plate etc. should be thoroughly...

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How I make Telescope Mirror Blanks - Michael Davis Publishing

This is a full-thickness, 8 inch diameter telescope mirror blank that I made myself. ... to make a mirror blank by fusing together a stack of thin glass disks in a kiln. ... be at least 5/16 inside the blank, and won't be reached during mirror grinding.

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Amateur Telescope Making (ATM) : the mirror - Denis Le Gourrierec

Making a telescope mirror consists in turning the flat surface of a glass disk into concave ... Finally, to make it reflective, the surface must be covered in a thin aluminium layer ... 2.3.2 Tool for grinding and polishing (completed 07/02/2014)...

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