WEBHe gives good advice on pitch making and polishing, suggesting a polishing time of four to six hours for a six in mirror, about the same as today. Little has changed in 75 years. One of the advantages of a long focus six inch mirror is that the errors and interpretation of the mirror's figure is much more straightforward.
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WEBTom Cave and his dad founded Cave Optical Company in the 1950s. Over three decades, Tom Cave was responsible for making thousands of telpes, as well as optics up to meters for industry and aerospace. ... Joy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror.
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WEBContrast experiments were also conducted on fused silica, using the same grinding parameters; this produced only very rough surfaces, which further validated the feasibility of the proposed model. The demand for reactionbonded silicon carbide (RBSiC) mirrors has escalated recently with the rapid development of space optical remote sensors ...
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WEBThe Tools: Grinding Polishing. You will need two tools: A hard tool for rough and fine grinding, and a soft tool, or pitch lap, for polishing and figuring. Traditionally, the pitch lap was made on top of the grinding tool. We recommend using plaster disks for tool substrates, and that you use separate disks for these two tools.
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WEBPhoto #2 shows the mirror at the end of rough grinding. I was aiming for an f/ mirror, so the required depth of the curve is inch. Once the required depth is reached, the rough grinding is complete. Amazingly, the rough grinding has removed over a pound of glass. The mirror now weighs in at only only 8 pounds 15 ounces.
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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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WEBJoy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. Richard Burns. Projetos De Ciência. Projetos Stem. Arduino. 1. How to Align Your Newtonian Reflector Telpe. Follow these 3 easy steps to learn how to align your Newtonian reflector telpe, also known as collimation, in this expert article!
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WEBJul 29, 2022 The secondary mirror holder and spider on my 12¾inch trusstube Dobsonian is made with scrap wood, a few nuts and bolts, and a stainlesssteel ruler. The curvedvane secondary mirror holders I use on almost all my telpes never fails to excite curiosity. Most people know that the principal benefit of the curved spider is spike .
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WEBThe condensed process of making a tile tool that will be used to grind my inch telpe mirror. Making a mould around the Pyrex disc, mixing and pouring...
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WEBJan 1, 2020 · Intrinsic grinding induced errors arise from both the change in d s and the form of the wheel, which evolve during the grinding process. The cross axis grinding configuration has the advantage that is most sensitive to the maximum d s and is relatively insensitive to wheel form. For the experiments presented in this paper, a single direction ...
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WEBThe demand for reactionbonded silicon carbide (RBSiC) mirrors has escalated recently with the rapid development of space optical remote sensors used in astronomy or Earth observation. However, RBSiC is difficult to machine due to its high hardness. This study intends to perform ductile mode grinding to RBSiC, which produces superior surface .
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WEBFeb 14, 2015 · Page 1 of 2 Making my own fixed post mirror grinding/polishing machine posted in ATM, Optics and DIY Forum: Hey guys. Im thinking of making my own fixed post mirror grinding/polishing and curve generating machine. Ive got loads of questions regarding the design so Ill just start firing away Do I need an eccentric moving tool to be .
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WEBMay 12, 2024 · Knowing how to polish rocks by hand is handy after you've spent a day finding some nice, your rock tumbling could be using a tumbler. Or you could discover the joy of handpolishing your rocks.
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WEBAug 16, 2023 this page contains material about amateur astronomy and telpe making
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WEBMirror maker 'X's mirrors are recognizable and distinct from mirror maker 'Y'. Our personalities impact how we make mirrors. Our processes and techniques vary. That's because there are many variables in mirror making. Each mirror makers chooses to control some factors and vary others in order to achieve the desired result. The Perfect .
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WEBJoy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. Richard Burns. Projection Screen. Rear Projection Screen. Solar Telpe. Rear Projection. Building. ... I had always thought that it would make a neat project, but the upcoming eclipse gave me a reason to continue. However, aft.
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WEBSep 26, 2023 · Mirror Polishing Technology. Molding polishing is a process of manually manipulating the surface of materials through the use of oilstone strips, wool wheels, sandpaper, and other implements to produce a smooth surface. Those necessitating highprecision surfaces may opt for ultraprecision grinding and polishing, which entails the .
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WEBThe initial rough grinding process uses grit sizes of 60, 120, and 180 to carve out the basic spherical cavity. The mirror is then fine ground with grits of sizes ranging from 220900. In both grinding processes, the grit is harder than the mirror blank and tool, resulting in a concave mirror and complementary convex tool.
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WEBAs machining starts, the abrasives of grinding wheel and work piece comes into contact and due to the rubbing force the initial layer from the grinding wheel is worn out and a fresh layer of the abrasives involve in machining this process is continuously repeated until complete machining is done. The process of wear out of the old layer and ...
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WEBOf course for rough grinding we use a mechanized method with a specially made machine. Our mirror was ground to our target radius with a curvature of R = 3500 mm using abrasives numbered 40 and 80. ... After rough sanding, the mirror is finely sanded using a special machine with different abrasive sizes with numbers from 80 to 1000. When ...
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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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WEBCasting a Large, LightWeight Telpe Mirror From Recycled Glass: The first photo below shows a inch diameter, inch thick, telpe mirror blank, made from recycled glass, that has been lightened by casting the mirror in a mold that made lots of hexagonshaped pockets in the back of the mirror. This is t.
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WEBPreparation before grinding. Making a plaster tool. Rough grinding. Fine grinding. Making a polishing tool. Polishing. Figuring. ... a great deal of money will be saved: a finished 24" scope will set you back 7,000; grinding your own mirror and building the mount yourself will cost you 2,000. Amateurs have made mirrors up to 41" by hand.
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WEBWhile a chip will not be fatal to a tool, if the glass chip falls onto the mirror while you are grinding, it most likely will leave a deep and hard to repair scratch on the mirror. You may want to put a larger bevel on a glass tool, especially if you are making a "fast" mirror. ... Bevel the edge before you start rough grinding.
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WEBJoy of Mirror Making: Rough Grinding. Rough grinding a telpe mirror. Richard Burns. Sumerian. Lager. Scopes. Experience. Experiences with Sumerian Alkaid and Canopus 16inch Telpes Reflectors Cloudy Nights.
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WEBRough Grinding . Once you have the back of the mirror ground flat through 220 and the face reasonably flat, you're ready to start roughing the curve into the mirror. I recommend #60 carborundum for rough grinding. By the way, as in all optical work, be sure that you always maintain bevel on the edge of the mirror throughout grinding.
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WEBCasting a Large, LightWeight Telpe Mirror From Recycled Glass: The first photo below shows a inch diameter, inch thick, telpe mirror blank, made from recycled glass, that has been lightened by casting the mirror in a mold that made lots of hexagonshaped pockets in the back of the mirror. This is t.
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WEBCarl's mirrors are highly prized for their smoothness and perfection! Jan 28, 2014 Carl Zambuto is polishing a telpe mirror in his optical shop. Carl's mirrors are highly prized for their smoothness and perfection!
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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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