WEBOct 9, 2008 · The cardboard tubes were lying around. The shingles used to mount the mirror were blown off roofs in storms. We built the mount from window cutouts from schoolhouse doors that had been thrown away ...
WhatsApp: +86 18203695377
WEBJan 25, 2024 · Your lensgrinding kit most likely included a polishing tool and pitch. Add a dab of pitch to the tool, moisten it with some water, and start polishing. Observe the transformation of your lens from a crude glass blank to a highprecision instrument. Measure ever so often with your micrometer.
WhatsApp: +86 18203695377
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...
WhatsApp: +86 18203695377
WEBThe Cassegrain telpe is probably the first type telpe that the ATM would like to make after mastering the basic Newtonian telpe. In this article I will show how it is possible for the ATM to make his own Cassegrain telpe. ... I ground the secondary with the workstand and worked the tool on top just like I would grind ...
WhatsApp: +86 18203695377
WEBIt is a finelooking, near fullthickness, 10 inch diameter blank that I intend to grind and polish into a 1st class telpe mirror. Here is a stack of my homemade 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
WhatsApp: +86 18203695377
WEBFor grinding the back of my 12" mirror, I used an 8" disk of 3/4" particle board, glued tiles to the front with epoxy, and coated the back and sides with polyurethane. It worked great. I made my polishing tool for my 12" mirror out of three layers of 3/4" particle board glued together. I used a chisel and a belt sander to put a curve on the ...
WhatsApp: +86 18203695377
WEBIntroduction. Grit is a generic name for the abrasive particles used with a hard tool in rough and fine grinding. Polish (or Polishing Compound) is a generic name for the abrasive used with a soft Pitch tool in polishing and figuring. Grit and Polish differ mainly in particle size and the type of tool they are used with.
WhatsApp: +86 18203695377
WEBMaking a Refractor Telpe: How to Design, Grind, Polish, Test, Correct and Mount a Doublet Lens. Be the first to review this product. Out of stock. SKU. . Add to Wish List. Email. Making a Refractor Telpe is a handson book for the amateur who has always thought making a refractor was too difficult to even .
WhatsApp: +86 18203695377
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 .
WhatsApp: +86 18203695377
WEBDiameters from ″ to 18″. Antares Optics offers an extensive selection of secondary mirror sizes from small ″ diameter minisecondaries for short tube refractors all the way up to massive 18″ secondaries for giant observatory telpes. Common sizes like 2″, 3″, 4″ and 6″ secondaries are in stock and ready to ship today.
WhatsApp: +86 18203695377
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).
WhatsApp: +86 18203695377
WEBMay 7, 2020 · Read Jean Texereau, How to Make a Telpe, even if you do find a good mentor to work with. It's a classic, very well written and the methods he describes are still spot on, in year 2020. I would recommend NOT starting with a thin mirror, a really big mirror, or a really fast mirror. An 8 inch f/6 or even 6 inch f/8 is a great starting point.
WhatsApp: +86 18203695377
WEBNov 17, 2023 · Dielectric Coatings. Silver Coatings. Standard aluminum coatings are by far the most common coatings for mirrors today, and most mirrors have either standard aluminum or aluminum that has been slightly enhanced chemically. They're deposited on the mirror in a vacuum chamber in one go, and the typical reflectivity is around 8993%.
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
WEBThis grinds out imperfections from the casting process to make the mirror smoother and more reflective and helps to grind a more accurate curve into the mirror. Artist Terry Kubecki Pearce, an expert in handgrinding telpe mirrors, was the man for the job. Nowadays telpe mirrors are made from glass which is ground into shape before ...
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
WEBA telpe mirror can be made from glass that is somewhat less pure than that used to make a lens, since light does not pass through it. Often a strong, temperatureresistant glass such as Pyrex is used. ... grinding, and polishing. A mirror is formed in exactly the same way as a lens until the reflective coating is applied.
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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.
WhatsApp: +86 18203695377
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 .
WhatsApp: +86 18203695377
WEBAug 15, 2019 · I made the overarm from " steel tube, cut and fitted to size. Buttwelded, 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 view the files attached to this post.
WhatsApp: +86 18203695377
WEBAstronomical (mirror blanks, kits, grinding polishing material, finished components, supplies) Bent or Slumped Glass ( for instrumentation, fixtures, helicopter light covers, camera windows, telpe mirrors, infrared mirrors, etc.) Chemically Strengthened Glass. Colored Optical Filter Glass (by manufacturers)
WhatsApp: +86 18203695377
WEBMake Your Own Telpe Mirror. Saturday mornings in January February. Cure that cabin fever with the company of other astronomy enthusiasts as you grind your own mirror. The workshop is held at my home in Tolland, CT and runs from 9am to noon during the months of January and February. Under the workshop concept you choose your own .
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
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 ...
WhatsApp: +86 18203695377
WEBMay 9, 2010 · The 20" quartz telpe mirror is polished out, and Gordon is ready to begin deepening the curve toward a paraboloid. In this video, he shows how to press ...
WhatsApp: +86 18203695377
WEBSet at the right angle it will start to make a concave curve in the angle determines how deep you want the center of the mirror to be. This is called the "sagitta". [Fig 5]After you've ground the glass to the desired depth the mirrors surface will be opaque like this.
WhatsApp: +86 18203695377
WEBFeb 14, 2015 · It's easy to tell with a mark on the edge of the mirror, and often even from the "flower" pattern in the cerium oxide. I rotate the mirror on the table often. During figuring I make sure to put the mirror back on the table in a different orientation after testing. Just finished a " f/3 that was pretty thin (" edge) and it turned out fine.
WhatsApp: +86 18203695377
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 .
WhatsApp: +86 18203695377
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. ...
WhatsApp: +86 18203695377
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 .
WhatsApp: +86 18203695377
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 .
WhatsApp: +86 18203695377
يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
الهند غنية بالموارد المعدنية المختلفة وهي سوق مهم لمعالجة المعادن
Copyright © 2023 GMC Co., Ltd. SiteMap
