grinding mirrors

grinding mirrors

Leonardo Da Vinci's mirror making machines

For large thin mirrors, say 12 inches [30cm] or greater and 1.5 inches [4cm] or thinner, the mirror back must be ground flat, or at least regular in shape before beginning fine grinding the mirror's face. Cast a tool specifically for the mirror's …

Joy of Mirror Making: Fine Grinding - BBAstroDesigns

While tools for grinding telescope mirrors is covered extensively elsewhere, I will say that the challenge posed by a fast mirror is that the sharp curvature requires your grinding surface to be made of small …

Mirror-o-Matic mirror making machine - ATM pages of ...

ÝÝÝÝÝÝÝÝÝÝÝ In his Codice Atlantico, Leonardo offers two of sketches of mirror making machines.Ý One machine is designed for grinding concave mirrors of small focal length.Ý The other machine, a much larger piece to implement, grinds mirrors of large focal lengths.Ý Though Leonardo da Vinci creates sketches of mirror grinding…

Tips for Using Mirrors in Copper Foiled Stained Glass

Feb 14, 2012· Mirror grinding safety - posted in ATM, Optics and DIY Forum: When grinding mirrors ATMs use grit sizes as small as 9, 5, 3 or sometimes even 1 micron. I am not yet at such small sizes and do not yet have to mix grit and water in a bottle to pour drops of it onto the mirror. I wear a dust mask to be sure not to breathe in any grinding …

How to Make Your Own Telescope Mirror - Instructables

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 …

Thin Telescope Mirror Grinding Advice

Mirror grinding is a noisy, messy, wet activity. It doesn't take up enough of your attention to fully occupy you, but it does take up just enough that you cannot do something else like watch TV, listen to the radio, etc. You're pretty much stuck there looking at your hands, and adding water or grit once in a while. ...

Mirror grinding - scope 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.It is cheaper, it is softer …

Newport Glass Works, LTD. Grinding, Polishing and Figuring ...

Dec 31, 2016· Page 1 of 2 - Grinding your own mirror - How is it possible to get accuracy in the nm? - posted in ATM, Optics and DIY Forum: So I have read forum questions & answers on topics such as whether it is possible to use a 3D printer to design and print out a telescope mirror, or design an array of paraboloids this way for a segmented design, and the answers have been, no, the 3D printers dont …

Ed Grinds a Mirror

When grinding thin mirror blanks, be conscious of downward pressure, which if excessive, may bend the mirror blank momentarily out of shape. While this is not a problem during rough grinding (as the amount of flex is exceedingly small) the effect becomes important as you reach the later stages of making your telescope mirror.

Joy of Mirror Making: Fine Grinding - BBAstroDesigns

Sep 02, 2020· Grinding Mirrors. Silver backing chips very easily so use the finest grit grinder head you can get – super fine if possible. Alternatively, use an old grinder head which is dulled already. If you use a coarse grit it will chip into the mirror …

Mirror grinding safety - ATM, Optics and DIY Forum ...

For large thin mirrors, say 12 inches [30cm] or greater and 1.5 inches [4cm] or thinner, the mirror back must be ground flat, or at least regular in shape before beginning fine grinding the mirror's face. Cast a tool specifically for the mirror's back, and grind with 220 grit, inspecting for low unground spots. Grind until they disappear.

A new grinding method for aspheric ceramic mirrors ...

Mirror grinding is a noisy, messy, wet activity. It doesn't take up enough of your attention to fully occupy you, but it does take up just enough that you cannot do something else like watch TV, listen to the …

Ed Grinds a Mirror

Dec 01, 1996· 3. AEGM for axisetric aspheric mirror In conventional methods of grinding an axisymmetric aspheric mirror, the wheel axis is fixed in a perpendicular position relative to the workpiece axis"'. The grinding path, OA, is a plane curve parallel to the xz-plane, as shown in Fig. 2(a). Only one part of the wheel (point PA) is used in this grinding ...

Grinding and Polishing a Meniscus Mirror – Astronomy ...

After your finished with fine grinding the mirror you will need to make yet another tool. This tool is called a pitch lap. It is made the same way as the penny tool you made to do the fine grinding except instead of pennies you will use "Pitch". [Fig 6] Here is a photo that shows the …

Grinding your own mirror - How is it possible to get ...

Placing the mirror face up and grinding with a moderate "W" stroke will also move the curve toward the edge, and tends to produce a more spherical surface. Leaving the mirror grossly hyperbolic will make fine grinding difficult. Fine Grinding . We've all heard stories about fine grinding …