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Questar TelescopesAstronomy Shoppe

Model Telescope Configuration Price; Standard 3-½ Pyrex Mirror, Magnesium Fluoride Coatings, Mdl. 10114 $5,150.00 Standard 3-½ Pyrex Mirror, Broad Band & Low

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Best Telescope Diagonals for you in 2021Astronomy Online

Orion 8850 2-Inch Refractor Telescope Mirror Diagonal $84 Orion also has the best selection of 2″ diagonals around so this will look a lot like the 1.25″ models. This Orion 8850 2-Inch Refractor Telescope Mirror Diagonal is a solid basic model that will replace the one that came with your entry level telescope.

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Hale Telescope Wikipedia

Originally, the Hale Telescope was going to use a primary mirror of fused quartz manufactured by General Electric, but instead the primary mirror was cast in 1934 at Corning Glass Works in New York State using Corning's then new material called Pyrex (borosilicate glass). Pyrex was chosen for its low expansion qualities so the large mirror would not distort the images produced when

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Amateur Telescope MakingAmateur Astronomers Association

Amateur Telescope Making.This started with the improvements in telescope design and mirror making that were popularized by John Dobson. It is easy to understand this as a type of engineering. It is not possible to simply take a good design and then scale it up.Pyrex is the material of choice. It is relatively cheap and available. The

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#1847890258

PRICE REDUCTION !! *** 17.05 Inch Dia. PYREX Telescope Mirror Blanks 10 1cm Thin Gold Blank Coins 1.5 Grams 10 ¼" Diameter Optical Flat Telescope Mirror Blank Nr

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Lockwood Custom Optics

For telescope mirrors the "you get what you pay for" rule certainly applies. The client decided on a replacement mirror, a 13" f/4.6, 1.1" thick, Pyrex mirror (made from a blank with excellent anneal).

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The Telescope Mirror Coating

If the mirror is a small diagonal it may be necessary to warm the alcohol in the sun before use. If the telescope has a dust cover and dew is kept from the mirror the mirror should not need to be cleaned for several years. A small amount of dust on the mirror is best ignored or you can huff the dust off with an ear syringe.

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Lightholder Optics--Premium Newtonian Mirrors

For the most discriminating planetary observers who prefer a more portable high-performance telescope we also offer 8" aperture F/7 and 10" or 12.5" aperture with an F/6 focal ratio, as the longer focal ratio makes it possible to consistently achieve wavefront peak-to-valley ratings of less than 1/20th wave with our known process capability.

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Telescope Products & Services Galvoptics

Telescope Products & Services We offer a range of products and services for the ameteur telescope enthusiast such as grinding powders, polishing powders /compounds, telescope aluminising services. We offer a Telescope mirror re coating service for both Primary and Secondary telescope mirrors.

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VIDEOS/PICSspectrum-coatings

Spectrum Coatings Vacuum Chamber Large Primary Telescope Mirror to be processed. 102_6706. 102_6729. 102_5300. 102_4766. 102_4760. 102_4439. 102_4437. The edge is a 21_ Zerodur Primary Mirror.jpg Kinda like a piece of art. Secondary Mirrors. Secondary for 20in, Primary. Littile Casserain Set.

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HOW TO MAKE A MIRROR elcamino.edu

HOW TO MAKE A MIRROR. Mirror and Tool. We start with a mirror blank. This is a round piece of Pyrex glass with one flat face (the bottom) and one face slightly shaped, but very rough.Here you see an image of a telescope mirror seen through the Foucault knife edge tester. The green and dark shadows reveal the slope of the mirror at

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Pyrex Wikipedia

Because of its low expansion characteristics, Pyrex borosilicate glass is often the material of choice for reflective optics in astronomy applications. In 1932, George Ellery Hale approached Corning with the challenge of fabricating the 200-inch (5.1 m) telescope mirror for the California Institute of Technology's Palomar Observatory project.

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All About GlassCorning Museum of Glass

Oct 03, 2021 · The mirror of the Mount Wilson telescope was made of plate glass, but that material would not work for a 200-inch mirror. Experimentation and prototypes. Hale's first choice was fused silica glass. From 1927 to 1931, engineers at General Electric in Lynn, Massachusetts, used this material in an attempt to produce mirror blanks.

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The Astounding Engineering Behind the Giant Magellan Telescope

Giant Magellan Telescope /GMTO Corporation The Mirror Lab currently houses four GMT mirrors in various stages of development, with the latest beginning its arduous production process just this week.

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NEWPORT GLASS WORKS, LTD. & NEWPORT INDUSTRIAL GLASS,

Telescope Mirror Starter Kitsthat encompasses Corning's Pyrex 7740 tubing and rod products, colored glass rods (made by North Star and Glass Alchemy) and other flame working supplies. These operations have been combined with our historical activities of providing molded optical and Pyrex glass blanks, optical and finished glass components

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AGI Products Fused Quartz Advanced Glass Industries

Fused quartz maintains the following characteristics thermally stable with a low coefficient of linear expansionSuppliers of telescope mirror blanks, Supremax 33 blanks, precision machined optical glass blanks, molded optical glass blanks, fused quartz, fused silica, optical glass, filter glass, Zerodur, and industrial glass.

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Eight-inch Parabolic Mirror, 130 inch focal length, Pyrex

This is an aluminized 8 inch diameter parabolic mirror. The mirror was figures from a blank of poured Pyrex glass. The focal length is 130 inches resulting in an f-ratio of 16.25. Condition of the mirror is excellent just a couple of voids in the coating

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Telescope Tips Spherical Mirror vs. Parabolic Mirror

Apr 14, 2021 · Telescope Tips Spherical Mirror vs. Parabolic Mirror. April 14, 2021Some telescope manufacturers try to compensate for the Spherical Abberation by adding a negative barlow lens into the focal tube of the telescope. This does have some effect in alleviating the problem, but does tend to be the optical equivelant of trying to get the

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Fused Silica Mirror Blanks Thorlabs

Thorlabs' mirror blanks are designed to be used as front-surface mirrors when coated. Fabricated from substrate-grade fused silica, which exhibits high transmission in the 185 nm to 2.1 μm range (refer to the transmission graph to the right), these mirror blanks offer a high degree of purity and

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Casting a Large, Light-Weight Telescope Mirror From

Casting a Large, Light-Weight Telescope Mirror From Recycled Glass The first photo below shows a 12.5 inch diameter, 1.5 inch thick, telescope mirror blank, made from recycled glass, that has been lightened by casting the mirror in a mold that made lots of hexagon-shaped pockets in the back of the mirror

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Large Homemade Telescope Making Project

(3) A homemade telescope mirror can be made with more accuracy and smoothness than the mass-produced, commercial mirrors available today. Unfortunately, the cost of mirror grinding kits and pyrex blanks has increased significantly in recent years to the point where any savings from making a mirror versus buying one are minimal at best.

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Mirror Grinding Machine

telescope mirror grinding machine based on Dennis Rech's M-o-M 20 .The mirror in these photos is a 10" Corning molded Pyrex blank. I hosed it off just before I took this photo so the slurry appears kind of thin. The dark spots are the pitch that fastens the mirror to the backing plate.

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How to Make Your Own Telescope Mirror Instructables

How to Make Your Own Telescope Mirror [Fig 1] This is a large piece of glass a woman off Craigslist gave me. It was 40"x40" and 0.75" thick. Its what I decided to use to make the mirror. Cutting it into smaller sections can be difficult but scoring it with a glass cutter and tapping t

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Pyrex 7740 8-Inch Mirror Blanks (SOLD)Astromart

I'm selling two Pyrex 7740 8-inch mirror blanks that I purchased many years ago. The first is a Corning molded blank which is tapered and has a raised lip on the backside and a very slightly raised lip on the front side about 1/4 inch wide around the perimeter that will need to be ground off. I'm asking $80 for this one because

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Hubble Optics Primary mirror 355/1778 Pyrex Enhanced Coating

Hubble Optics revolutionary lightweight sandwich mirror is a cost effective and superior alternative to other lightweight and solid mirrors available on the market. The Hubble sandwich mirrors are designed and built in a similar style to the Hubble Space Telescope, the most advanced telescope ever built.

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Optic Wave Laboratories Products

Prices are subject to revision at any time due to the shrinking supply of Pyrex mirror blanks. Standard focal ratios, Strehl ratio of .950 or greater. Standard mirrors on substrates of thicknesses in the semi-thin range. Provides a balance between stiffness and thermal equalization.

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Lockwood Custom Optics In Stock & Standard Sizes

Lockwood Custom Optics Finished mirrorsThese are mirror blanks, not finished mirrors, and are on hand and ready for grinding.16" f/5.0, 1.40"-thick Pyrex two in stock, great for a big binocular telescope. 20", 1.25"-thick Pyrex can be generated to any custom focal length, fast cooling. 20", ~1.75"-thick Pyrex can be generated to

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Dobsonian telescope Wikipedia

A Dobsonian telescope is an altazimuth-mounted Newtonian telescope design popularized by John Dobson in 1965 and credited with vastly increasing the size of telescopes available to amateur astronomers.Dobson's telescopes featured a simplified mechanical design that was easy to manufacture from readily available components to create a large, portable, low-cost telescope.

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Telescope Reflectors Buy Telescope Reflectors Online at

Online shopping for Reflectors Telescopes from a great selection at Electronics Store. Online shopping for Reflectors Telescopes from a great selection at Electronics Store.The Virgo Outdoor HD Monocular Space Telescope Astronomical 90X Refractive Telescope with Portable Travel Tripod Adjustable Lever. by The Virgo. Currently unavailable.

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Grinding 10" pyrex blank for telescope mirror YouTube

Mar 19, 2021 · Grinding 10" pyrex blank for telescope mirrorHomemade polishing machine,Grinding 10" pyrex telescope mirrorAlexrusastro 38,977 views. 429. Grinding a 12.5-inch telescope mirror with

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Oct. 3, 1947 Birth of Palomar's 'Giant Eye'WIRED

Oct 10, 2021 · Oct. 3, 1947 Birth of Palomar's 'Giant Eye' The 200-inch mirror blank for the Hale Telescope had only a rough, flat front surface in 1936, before it

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Telescopes and Optics Overview RCOS

Telescopes and Optics Overview Why do most Professionals choose the Ritchey-Chrétien design? The Ritchey-Chrétien optical design is a specialized Cassegrain telescope designed to eliminate coma, thus providing a relatively large field of view as compared to a more conventional configuration. An RC has a hyperbolic primary and a hyperbolic secondary mirror.

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