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Mirror Grinding Primary

Milling Equipment : Mirror grinding primary - A class of machinery and equipment that can be used to meet the production requirements of coarse grinding, fine grinding and super fine grinding in the field of industrial grinding. The finished product can be controlled freely from 0 to 3000 mesh.

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Obsession Telescopes / Optics

About our mirror suppliers. Obsession Telescopes feature primary mirrors made by two of the best established and most reputable optical companies serving the astronomy community today. Optical Mechanics Inc. OMI supplies Obsession with 12.5 to 25 aperture mirrors. Ostahowski Optics supplies Obsession with 15 to 22 aperture mirrors.

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Optical Testing of Parabolic Mirrors : 9 Steps (with ...

After hogging out the mirror then you use finner and finner grinding grits to remove the scratches in the mirror from the previous step. During this phase you are averaging out your strokes to keep the mirror figure roughly spherical.

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Mirror grinding kit grind and polish telescope mirror at ...

All our Mirror Kits contain a Pilkington Float Glass mirror blank and Grinding Tool. These arefinished with fine ground edges. 180 grade first stage ginding powder. 400 grade ginding powder. 303 grade smoothing powder. Top quality Cerium Oxide Polishing powder.

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Telescope Making Links - Designs and Techniques | STAR ...

Berthold Hamburger's Tile Tool Page mirror Grinding with Washers Grinding Large Thin Mirrors Part I GrindingPolishing and Figuring Large Thin Mirrors - Part 2 - Polishing Astronomy telescope making mirror grinding and testing Large Thin Mirror Making by Mel Bartels Grinding Machines Mirror-o-matic Tom Waineo's Desktop GrindingPolishing ...

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Telescope Mirrors & Prisms for sale | In Stock | eBay

Buy Telescope Mirrors amp; Prisms for Labor Day This Labor Day browse through great selection of cameras lenses and photography and film equipment. Shop for: Tamron 15-30mm Camera Lenses .

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Stellafane ATM: Measuring Sagitta

Calculating Sagitta. Before you start grinding you should have decided on your mirror's desired focal length. The two most common beginners' mirrors the 6 f8 and 8 f6 both have 48 focal lengths. Use this formula to calculate your target sagitta: Sagitta s MirrorRadius2 4 FocalLength r2 4F.

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Rough Grinding of a Telescope Mirror | Guy's Math & Astro …

Dec 15 2014 First of all f-ratio means the ratio between the focal length and the diameter of the primary mirror. So if you plan on making an 8 diameter mirror with a 40-inch focal length 40 divided by 8 gives you an f-ratio of 5. With no units. If you wanted a 10 diameter mirror with the exact same focal length we would call that f4.

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Rough Grinding of a Telescope Mirror | Guy's Math & Astro …

Dec 15 2014 One way: do about 8 circular strokes. Then center the mirror on the tool. Turn the lower piece of glass to the left by about 15 degrees 1 hour on a normal clock face; then turn the upper piece of glass about 10 more degrees. Then grind away for 8 more circular strokes.

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Stellafane ATM: Measuring Sagitta

Don't confuse lower case r mirror radius with upper case R Radius of Curvature which is twice F Focal Length. Calculating Sagitta. Before you start grinding you should have decided on your mirror's desired focal length. The two most common beginners' mirrors the

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Mirror grinding - scope making

Draw a grid on the mirror surface with a permanent marker --picture Add the usual half teaspoon of grit sprinkle with water and grind for a couple of minutes rotating tool and mirror often. Rinse the mirror and inspect the grid lines. If the grid is worn out evenly you are doing fine.

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Reflector Telescope Mirrors for sale | In Stock | eBay

Get the best deals on Reflector Telescope Mirrors when you shop the largest online selection at eBay.com. Free shipping on many items Browse your favorite brands ... D76F300 Primary Mirror Secondary Mirror lens Set For Astronomical Telescope. 64.60. Was: 68.00. 3.99 shipping.

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Swayze Optical! - Home Page

Grinding and polishing the mirror is the most difficult part of making a telescope. And the most critical. Mirror-making is a hobby that has been around for many years and many people have put their hands to the task but it is time consuming requiring a great deal of skill patience and perseverence. Especially when the mirror gets big.

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GSO Parabolic Primary Mirror - 6" f/8

GSO's parabolic primary mirrors are perfect for those who want to build their own telescopes or replace mirrors in older ones. Ranging in aperture from 6 to 16 and offered in various f-ratios these mirrors are made from optical grade BK-7 glass. All mirrors have a

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How I make Telescope Mirror Blanks

Here is a stack of my home-made 8 and 10 inch mirror blanks. The second from the bottom is the one above. I can use the thinner blank below it as the grinding tool. UPDATE I have started rough grinding one of my home-made 10in glass blanks. Here is an action shot of me pushin' glass. I am aiming for an f5 mirror.

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AGI Products: Telescope Mirror Blanks

If one of our standard telescope mirror blanks isn’t exactly what you’re looking for Advanced Glass can custom make a telescope mirror blank to your specifications. AGI can manufacture mirror blanks up

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Buy Telescope Mirrors - Jim's Mobile

Jim's Mobile Inc. JMI Telescopes is a world renowned manufacturer of astronomical telescopes and aftermarket accessories for the amateur and professional astronomer. We manufacture telescopes and accessories such as telescope wheels carrying cases guiding computers focusers motors and motor controls and much more.

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Four Infamous Telescope Myths - Sky & Telescope - Sky ...

Jul 28 2006 No mirror regardless of glass type will perform adequately until this boundary layer goes away. Temperature-related deformations of a mirror's figure are minor compared to the boundary layer's deleterious effects. Venting the primary mirror — ideally with fans as pictured here — can help you get rid of this problematic air layer.

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Making a homemade mirror grinding machine - ATM, …

Mar 06 2006 The larger one is for grinding and polishing mirrors and is also used at higher speeds to centrifugally cast resin mirrors an experiment I am playing with in my spare sic! time. The smaller mirror is used for power wrapping epoxy impregnated fiberglass around mandrels for making tubes and cylindrical components for open trusses.

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Telescope making and Maintenance

Mirror grinding kits from Newport includes glass for primary mirror completed secondary mirror polishing compounds AND coating of the primary mirror when it is completed. 4.5-inch - 67 to 73 6-inch - 100 to 120 8-inch - 150 to 170 10-inch - 300 to 320

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Study on active lap tool influence function in grinding 1 ...

Nov 01 2013 Study on active lap tool influence function in grinding 1.8 m primary mirror. Haitao L Zhige Z Fan W Bin F Yongjian W. We present a theoretical modeling method to predict the ring tool influence function TIF based on the computer-controlled active lap process.

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Secondary mirror making - ATM, Optics and DIY Forum ...

Oct 20 2012 You make the secondary mirror the same way you make the primary with the same grit and polish but with the object being to create a plano infinite radius surface. You start by grinding your elliptical or rectangular blank on something FLAT like a piece of plate steel. You can buy cutoffs cheap from some local metal supply. Google grinding ...

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

Rough grinding This step is about making one side of the glass concave. It will give your mirror its overall focal ratio. If you make the centre deep you will end up with a fast telescope e.g. FD 4 well suited for deep sky observations.

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

Start grinding by concentrating the center of the mirror on the edge of the tool. Use a long W stroke occasionally stroking the center of the mirror out to 2 to 3 from the edge of the tool progressing around the circumference of the tool rotating the mirror.

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Telescope mirror grinding and testing: Mickel, Joseph ...

Telescope mirror grinding and testing Unknown Binding – January 1 1956 by Joseph Mickel Author See all formats and editions Hide other formats and editions. Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. Then you can start reading Kindle books on your smartphone tablet or ...

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Amazon.com: telescope mirrors

Telescope Mirror Set - 203mm Primary amp; 100mm X 70mm Secondary Mirrors. 129.99 129. 99. FREE Shipping. Only 4 left in stock - order soon. SVBONY 1.25 inches 90 Degree Zenith Diagonal Mirror for Refractor and Cassegrain Telescopes Astronomical Telescope.

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Homemade Telescope Making - Google Sites

The mirror or tool was then carefully placed on top of the tool or mirror and grinding started i.e. pushing the glass disk on top back and forth. The procedure was quite similar to grinding a smaller mirror except that the disks are heavier.

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Basics of Mirror Grinding - Brown University

The mirror is then fine ground with grits of sizes ranging from 220-900. In both grinding processes the grit is harder than the mirror blank and tool resulting in a concave mirror and complementary convex tool. The primary action of the grit is to fracture the glass.

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Dick Parker's Telescope Mirror Workshop: Cassegrain ...

The primary is a concave mirror and the secondary is convex and placed inside the primary focus. The secondary reflects the light back toward the primary. Depending on the curve of the secondary the light can and most often does come to focus behind the primary having passed through a hole in the the primary.

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Telescope Mirrors, Blanks, Secondaries, Grinding Materials ...

The primary mirror is a full parabola and the secondary is a hyperbola. Custom ... per kilo 40AUD Tin oxide grinding powder per kilo 30AUD Pumice grinding powder per kilo 30AUD 80 Grade grinding powder per 8 mirror 2AUD 120 2AUD 220 3AUD 320 4AUD 500 6AUD 1000 8AUD 1600 8AUD Cerium Oxide 8AUD Lap resin kit ...

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Mike's Telescope Workshop - Mike's World.

This is my home-built edge grinding machine for grinding down my home-cast mirror blanks. Click to see the whole project. This is a 12.5 inch diameter 1.5 inch thick light-weight honeycomb-back telescope mirror blank that I made myself. The blank only weighs 10 lbs 4 oz. I am very excited about this process.

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