WEBCreating a telpe mirror is more than just grinding the appropriate shape into the mirror. The most important part is figuring the mirror to the appropriate prescription, which requires having an appropriate test mechanism (to verify the prescription) as well as a diagnostic mechanism (to identify which parts of the mirror need correction). ...
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WEBSharing how I made a simple turntable to grind a telpe, I share the mirror kit I bought 6in plate glass with various carborundum grits. Ne...
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WEBf// – € f// – € protected silver coating +€ * costs. Contact us for prices of any diameters which is not listed here or for thicker mirrors. Here you can see the independent test results of two of our telpe mirrors. The test is made by the famous expert Wolfgang Rohr.
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WEBJan 26, 2024 · Each component serves a distinct purpose. The main telpe tube houses the telpe's optics. The focuser connects the eyepiece to the telpe and allows for fine adjustments. The mirror or lens cell holds the telpe's primary mirror or lens. The eyepiece holder secures the eyepiece, and the finder scope helps you aim the .
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WEBAnother way to look at is to consider how many waves of light the mirror needs to remove in going from spherical to parabolic. A 10 inch [25cm] F5 changes by waves of green light either by lowering the center or by lowering the edge. Parabolizing by lowering both center and edge removes waves of glass.
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WEBJust like our Stellafane mirror class, these groups will help you learn how to make a telpe mirror, and provide guidance, instruction, and mentoring to help you with your project, and connect you with knowledgeable ATM's to answer your questions. ... NCA Telpe Making and Mirror Grinding Classes Twice Weekly on Tuesday Friday .
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WEBThis is the focus of all your work you will turn this flat piece of glass into an accurate parabolic telpe mirror. We recommend a full thickness Pyrex blank for mirrors up to to 12" in size. ... in various grades, are used as an abrasive between the mirror and tool to grind the glass. Pitch is used to make a soft, conforming pitch lap for ...
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WEBStep 6: Measure the Sagitta. Continue grinding until you get the desired curvature. To estimate the curvature, we will use a dial indior to measure the sagitta. If you want to build a telpe for planets and moon observation, you will need a longer focal ratio (F/8 or higher). This means a shallow mirror.
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WEBLikewise, plastic is nowhere near thermally stable enough for use in a telpe mirror and will deform with different ambient temperatures. Most people who make their own mirrors will get a glass blank of lowexpansion glass and grind + polish it using special tools and techniques, and then get it silvered (though silver is rarely used ...
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WEBThe two most common beginners' mirrors, the 6" f/8 and 8" f/6, both have 48" focal lengths. Use this formula to calculate your target sagitta: Sagitta (s) = Mirror_Radius2 / ( 4 × Focal_Length ) = r2 / 4F. or use our Telpe Formula and Design Comparator to do the math for you. If you have measured a Sagitta and want to know the resulting ...
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WEB1. Clean: Make sure your plaster disk is clean and you are using a glass substrate or tile tool, clean the surface with turpentine. 2. Build a Dam: Using 2" wide masking tape, build a dam at least 3/4" high around the edge of the disk to hold the pitch in when you pour it. Leave a tab at the end by to facilitate later removal.
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WEBGrind the back of the mirror agains the back of the tool or against something else (a piece of glass, or flat piece of metal) until you don't see much difference from GOOD straight edge. Better yet, use a good spherometer to check the curvature. Keep grinding the back up through at least 12 micron, making sure it stays flat.
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WEBWe would like to show you a description here but the site won't allow us.
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WEBJun 4, 2018 · For a starter DIY telpe for a budding astronomer, build a Galilean telpe with a focus of 9x. With this powerful telpe, you see features on Earth's moon and Saturn's rings as a disk. SCIENCE . Biology. Cells ... Spend the bulk of your money on a big mirror, eyepiece lenses and big focuser that will take 1 ¼ inch or 2 inch .
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WEBRichard F. Caris Mirror Lab tour tickets are available for the summer. Please read below as our tour has changed. For inquiries, the best method to reach us is by sending an email message to Our phone number has changed to . We will meet at the lobby of Steward Observatory and begin our tour at the Steward ...
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WEBSep 17, 2021 · Steps for Telpe Mirror Coating. Step 1: Strip the old coating. Step 2: Prepare the praying chemical mixture. Step 3: Clean the mirror. Step 4: Sensitize the mirror surface. Step 5: Spray the mirror surface with the silvering mixture. Step 6: Apply antitarnish coating and let dry.
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WEBMay 28, 2016 · Documenting the telpe build, including mirror grinding and figuring, and construction of the Renegade telpe body. Part 1 includes prepping the mirro...
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WEBFeb 19, 2013 · For a 12 inch working by hand I can do the grinding in one afternoon if it is generated . Polishing should not take more than 10 hrs . Get it all polished out your work is half done. Testing and knowing what to do takes skill and should not be understated . No harm in having a pro test it .
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WEBAfter making one or two paraboloidal mirrors for Newtonian telpes, many amateur telpe makers turn their thoughts toward more advanced projects. Often they are attracted to making a refractor lens, but lack the information needed to do the job. ... and thus won't describe the basic processes of grinding and polishing glass, or testing an ...
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WEBNov 4, 2022 · "Amateur Telpe Making, Book 1″ by Albert Ingalls has a complete description of how to make such a telpe, including grinding and polishing the mirror.
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WEB410 votes, 43 comments. 151K subscribers in the telpes community. The home to all amateur astronomers telpes! ... The slightest unwanted stress on the mirror during grinding and you're basically grinding against a shape that isn't representative of its natural resting shape, leading to astigmatism, zones, or overall inaccurate figure. ...
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WEBSep 20, 2023 · A Newtonian telpe, invented by Sir Isaac Newton, is a type of reflecting telpe. Newtonian telpe uses a concave primary mirror and a flat secondary mirror to gather and focus light from distant celestial objects. Newtonian telpe is known for its simple and efficient design, making it popular among amateur astronomers.
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WEBFeb 16, 2021 · Grinding a Large Thin Mirror # Introduction # Years ago amateur telpes were made with mirrors of a relatively modest size. 6 and 8 inch telpes were considered large. A 10 inch telpe might be the envy of a club or observing group. In the recent past people have learned how to make large mirrors. This started with the .
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WEBThis kit includes a 6 inch telpe mirror blank, all the silicon carbide grits, white aluminum oxide powders, gugolz pitch, and cerium oxide polish you will need to grind and polish a 6 inch telpe mirror all bundled in one spot. This will get you on a great start to building your own telpe. Skip to the end of the images gallery.
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WEBA tile tool may completely grind an 8inch f/8 mirror without reapplying tiles. Bigger mirrors will probably need a second and third layer of tiles. It is possible to stand the tiles on edge within a form set on a Saran Wrap covered mirror and encase them in Pourstone Plaster. This will give you a full inch of tool thickness which will ...
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WEBAfter hogging the mirror blank to depth, the rough grinding stage begins. In this video I am grinding with 60/90 grit. The wets are lasting about 90 second...
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WEBPanasonic HDCSD60 Telpe mirror grinding machine, Grinding 10" pyrex blank for telpe mirror. Newport Glass Works, LTD. Grinding, Polishing and Figuring .. Grinding, Polishing and Figuring . Thin Telpe Mirrors . Abridged from an article appearing . are several ways to support the grinding and polishing .
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WEBOct 23, 2022 · Grinding mirrors, especially deepening the mirror with course carbo, I always push the mirror using very long Wstroke most of the time concentrating on the edge of the tool. Thinking about 'concentrating on the edge of the tool', (while I was grinding.. 😁 )I thought why not work a fully on the edge of the tool avoiding the .
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WEBMar 19, 2005 · Placing the tiles is simple. First draw a circle on white paper the size of your mirror, glue each tile with white glue on the paper with the grinding side of the tiles facing the paper. Leave a gap of about 1/8 to ¼ inch between each tile, resembling the facets of a pitch lap (See pictures).
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WEBGrinding,Polishing and Figuring Part 2 Polishing. 8610 CENTRAL AVE, STANTON, CA 90680TEL. * FAX * EMAIL Thin Telpe Mirrors. Part 2 Polishing. Abridged from an article appearing in Telpe Making #13 Provided: Courtesy of Astronomy .
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