grinding mirrors

Large Thin Mirror Making

Having made a dozen mirrors of 16" to 30" in size, it is my suggestion that 2" thick pyrex glass is significantly easier to work with than thinner pyrex glass. In particular, there is much less concern for astigmatism during fine grinding, and flexing of the mirror at the

Mirror grinding

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 have the "pride of achievement" by fabricating something as precise as a telescope mirror.

Thin Telescope Mirror Grinding Advice

Thin Telescope Mirrors and Mirror Making There is a wealth of great information on the internet regarding the benefits of thin mirrors, and techniques for grinding thin mirror blanks. Here is one such website created by someone with much experience the realm of creating fine homemade telescopes using thin (and ultra-thin!) mirror blanks...

Grinding Machine for Large Telescope Mirrors

Grinding machine for mirrors up to 42 inches [1.1m] in diameter. Can be configured for spin or stroke work. 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 ...

Glass Grinding & Cutting Services | UQG Optics

Glass machining services. UQG Optics offers glass and optical machining services on customer materials and components. Jobs can range from simple tasks such as cutting a piece of float glass in half to more complex tasks such as cylindrically grinding quartz rods to tolerances of 0.01mm. We can undertake precision grinding and cutting of one ...

OSA | Ductile mode grinding of reaction-bonded silicon …

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, which produces superior surface integrity and fewer subsurface damages, thus ...

Mirror-o-Matic mirror making machine

Mirror-O-Matic grinding machine When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a ...

Mirror Grinding Machine

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 couple of belts, the machine can quickly be reconfigured for ...

Grinding Telescope Mirrors, Then and Now | Consortium …

 · The master craftsman, Roger Angel, who has been making telescope mirrors for 30 years, or its the technicians arranging—arranging not simply throwing into the mold—chunks of glass (pictured above), or those grinding and polishing the mirror, success depends on just knowing when you''ve done it …

(PDF) Grinding of aspherical SiC mirrors

By using the grinding methods proposed here, we successfully obtain aspheric mirrors made of SiC, with higher precision in shape accuracy and low surface roughness, as Rmax = 20-40 nm, Ra = 2 ~ 5 nm.

Grinding of aspherical SiC mirrors

 · GRINDING METHOD 2.1 Toroidal and cylindrical mirrors In this paper, grinding of toroidal mirrors, circular and elliptic cylinder mirrors is investigated. mirror surfaces have two planes of symmetry. These 0924-0136/96/$15.00 1996 Elsevier Science S.A.

Ductile mode grinding of reaction-bonded silicon carbide …

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, which produces superior surface ...

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grinding mirrors

 · grinding mirrors - posted in ATM, Optics and DIY Forum: how do you grind a flat mirror into a parabolic one???I have heard that you can rub 2 mirrors together, how do you use this ...

Building a fixed post mirror grinding machine

 · I made the overarm from 1.25" steel tube, cut and fitted to size. Butt-welded, cleaned up with a grinder, painted and trial fit. It seems too low, but I will build sandwiched plywood layers, glued together and put everything up on that. You do not have the required permissions to …

telescope mirror grinding machines

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 couple of belts, the machine can quickly be reconfigured for

Mel Bartels'' Amateur Telescope Making

My current project: ''big wave optics'' - matching 30 inch [76cm] F2.7 thin meniscus mirrors: I have finished grinding, polishing and parabolizing twin 30 inch [76cm] F2.7 mirrors. Next up: home silvering the mirrors. My proposed 30 inch design using NewtDesigner

telescope mirror grinding / polishing machine with …

 · The machine is shown grinding a 300 mm mirror.How to build a tachometer:

Making a homemade mirror grinding machine

 · Making a homemade mirror grinding machine - posted in ATM, Optics and DIY Forum: I want to make a motorized mirror grinder, any good info on this, i have a couple geared motors, low speed high torque. One more question ...will 1 1/2 shaft size pillow block

Grinding mirrors by machine?

 · Grinding mirrors by machine? - posted in ATM, Optics and DIY Forum: Has any1 made a machine to ground mirrors. I would rather make a machine capable of grinding than do it by hand. It would probably take me less time as well. Is there any technique to it or is it just making a bit of glass a concave shape so that its focal length is 1200mm or watever. Also what do you use to rub the glass or ...

Mirror grinding | Etsy

Check out our mirror grinding selection for the very best in unique or custom, handmade pieces from our shops.

grinding an optical flat mirror

Flat mirrors (and in the following any mirror with a radius of curvature in the range of several kilometers or on its way to it will be a "flat" mirror ) have to meet two conditions: They should have a (spherical) surface free of zonal defects and the radius of curvature of the sphere should be as large as possible, in the range of several kilometers up to over 100 kilometers, depending on ...

Telescope Making Supplies

Throughout the grinding and final lapping stages, the objective has been to reduce pits and scratches to the smallest possible size. However, no amount of grinding can produce a surface smooth enough or sufficiently transparent to meet the needs of a first-class telescope objective.

Mirror Grinding Machine

My Mirror Grinding Machine For a long time I''ve wanted to build a machine for grinding telescope mirrors. Dennis Rech''s M-o-M designs finally inspired me to just get up and do it. Over the years, I''d been collecting motors, gear boxes, pulleys, etc. Most of them ...

Optical Services – Galvoptics | Optical Assembly | Precision …

Optical Assembly. In addition to the manufacture and supply of your optical components we also offer an in house optical assembly service. Whether an existing customer looking to reduce your own internal workload or a new customer seeking a production partner, we can offer this service for 1off to volume production quantities.

grinding mirrors

 · hi allI am being a bit lazy here. I am thinking about trying to grind a 6 or 8 mirror to make a planetary dobsonian. Therefore the mirror would be maybe f11. I am tall and know the tube length will be long esp. in the latter.Is it easier to grind a slower mirror like this and

First time mirror grinding

 · In grinding that is used to deepen the centre of the mirror but you don''t want to do that now until figuring. Thus the shorter the stroke the better in polishing. I worked my mirrors on a pedestal/barrel and rotated the mirror and moved a step round every stroke in an almost continuous movement.

New Grinding Methods for Aspheric Mirrors with Large Curvature …

New Grinding Methods for Aspheric Mirrors with Large Curvature Radii Z. Zhong, The institute of Physical and Chemical Research/Japan - Submitted by T. Nakagawa (l), University of Tokyo/Japan ...

Amazon : telescope mirror

SVBONY 1.25 inches 90 Degree Diagonal Mirror for Refractor and Cassegrain Telescopes Astronomical Telescope. 4.4 out of 5 stars. 164. $18.99. $18. . 99. Get it as soon as Fri, Jun 25. FREE Shipping on orders over $25 shipped by Amazon.

Build your own telescope part 1: The mirror – Thomas …

The problem with thin mirrors is that they flex more easily during grinding and polishing, making it hard to achieve the required surface precision. They also need a more complex mirror cell (additional support points). Plop is a useful software to let you calculate

Making mirrors for giant telescopes

Fine grinding and polishing of Segment 2 took less than half the calendar time as the same operations for Segment 1. Development of tests for the GMT off-axis segments was a major challenge. Like all modern telescope mirrors, they are measured with an.

Grinding, Polishing and Figuring

Grinding, Polishing and Figuring Thin Telescope Mirrors Abridged from an article appearing in Telescope Making #12 Provided: Courtesy of Astronomy Magazine Article''s Author: Bob Kestner Part I - Grinding For many years, amateur astronomers and telescope ...

Joy of Mirror Making: Rough Grinding

31  · Grinding the curve into the mirror face can be done by one of the following approaches: …

mirror grinding moulding

Mirror Molding vs grinding Amateur astronomy equipment techniques info etc Mirror Molding vs grinding Wanted Source for Parabolic Mirrors or Grinding... Moulding Catalog Template Ready DXF May 27 2013 0183 32 Unsubscribe from Mirror Reflections Inc A through demonstration on how to use the Mirror Reflections online moulding...

Joy of Mirror Making: Rough Grinding

Rough grinding a telescope mirror Fast mirrors can be rather deep. Here are 6 inch [15cm] F/2.8 and 10.5 inch [27cm] F/2.7 Steady Progress Progress is proportional to …