NASA eyes first-ever carbon-nanotube mirrors for …
A lightweight telescope that a team of NASA scientists and engineers is developing specifically for CubeSat scientific investigations could become the first to carry a mirror made of carbon nanotubes in an epoxy resin. Posted: Jul 12, 2016 NASA eyes first-ever
Materials & Tools - Stellafane: Home of the Springfield …
Mirror Blank This is the focus of all your work - you will turn this flat piece of glass into an accurate parabolic telescope mirror. We recommend a full thickness Pyrex blank for mirrors up to to 12" in size. Full-thickness means the diameter to thickness ratio is 6:1 (i
Telescope Making Supplies
Silicon carbide is an extremely sharp, synthetic abrasive which approaches the diamond in hardness. It is made by mixing finely ground petroleum coke with pure glass sand. The mixture is loaded into a crucible and heated by electric arc to temperatures in excess of 2000°C.
Optical Properties and Appliions of Silicon Carbide in …
11 Optical Properties and Appliions of Silicon Carbide in Astrophysics Karly M. Pitman 1, Angela K. Speck 2, Anne M. Hofmeister 3 and Adrian B. Corman 3 1Planetary Science Institute 2Dept. of Physics & Astronomy, University of Missouri-Coluia 3Dept. of Earth & …
Safran Reosc wins fifth contract in a row for ESO’s …
The ELT will be the most powerful telescope ever built. The M5 mirror for the ELT is a flat elliptical silicon carbide mirror measuring 2.70 by 2.20 meters. It will be the world''s largest mirror with optical precision in the 10 nanometer class built to date.
DESIGN OF A BASIC ANGLE MONITORING SYSTEM IN SILICON CARBIDE
sintering Silicon Carbide is extremely hard, and the ma-terial must be polished to get the ﬁnal shaping and align-ment. The loions, which should be polished, are there-fore preferably well reachable and the nuer of these loions should be limited. 3.1. Main
（： silicon carbide，carborundum ），SiC，，，，。 1893。，
Affordable, Ultra-stable CVC SiC UVOIR Telescope for …
The common need cited is a mirror technology that is lightweight, dimensionally stable, high performance, and above all else, cost effective. One of these potential future observatory missions is the Advanced Technology Large-Aperture Space Telescope (ATLAST) (Marc Postman et.al., SPIE Journal of Optical Engineering, 51(1), 011007, January 2012).
Foam-core mirrors architecture by Ultramet
Silicon carbide foam-based mirror, 10″ diameter, after polishing Contact an Expert Silicon Elemental silicon is an excellent mirror material given its outstanding polishability and, as can be seen in the following table, its extremely low density and outstanding
Optimum structural design of lightweight silicon carbide …
Optimum structural design of lightweight silicon carbide mirror in Cassegrain system Abstract: Major efforts in space optics have inspired research in high performance, low cost, very lightweight reflective telescope systems in which Cassegrain system is widely used.
Optical Materials: Silicon carbide mirrors benefit high …
Fabried from silicon carbide, a solid 50 mm galvanometer “x” scan mirror can provide the stiffness for high-speed rotation. The light-weighted design lowers mirror mass and inertia, but needs an optimized rib structure to meet the stiffness requirement at high scan speeds.
Thin film metallic glass broad-spectrum mirror coatings …
The co-sputtering of Al 90 Y 5 Ni 5 (at.%) with pure Zr and Zr 44 Cu 40 Ag 8 Al 8 (at.%) alloy compositions were selected to apply thin film mirror coatings by PVD via magnetron sputtering on silicon carbide substrates. The Zr 44 Cu 40 Ag 8 Al 8 (at.%) alloy composition has excellent glass forming ability, relatively high hardness and thermal stability.
THIN SILICON CARBIDE COATING OF THE PRIMARY MIRROR OF …
THIN SILICON CARBIDE COATING OF THE PRIMARY MIRROR OF VUV IMAGING INSTRUMENTS OF SOLAR ORBITER Udo Schühle (1), Hein Uhlig(2), Werner Curdt(1), Thorsten Feigl(2), Armin Theissen , Luca Teriaca (1) Max-Planck-Institut für Sonnensystemforschung, Max- Planck-Str. 2, 37191 Katlenburg-Lindau (Germany)
SCANNING TELESCOPE - RAYTHEON COMPANY
25/6/2015· A scanning telescope including an on-axis four-mirror reflective telescope configured to receive electromagnetic radiation through an the primary, secondary, tertiary, and quaternary mirrors are fabried from one of single crystal silicon, silicon carbide, and
Actuated Hybrid Mirror Telescope - CORE
The mirror-shape-control actuators will be low-power, high-capacitance lead magnesium niobate electrostrictive actuators that will be eedded in the SiC structures. The mode of operation of these actuators will be such that once power was applied, they will change in length and once power was removed, they will maintain dimensional stability to nanometer precision.
Waite Research :: 20" F3.5 Telescope Mirror
The fabriion of this 20" F3.5 telescope mirror was a little unusual. In almost all cases, I purchase mirror blanks that are "pre-generated" at the glass fab. That means that they grind the rough curve into the mirror''s face before I receive the glass. This is
SPAC Mirror Lab - Mirror Making
focal length - measured from mirror surface to a point where a reflected image is formed. grit size - the nuer of grains per inch (e.g. 60 grit has 60 grains of silicon carbide per inch) The larger the nuer the finer the grain. parabaloid - the perfect shape for a
ESA Science & Technology - Gaia mirrors ready to shine
With the delivery of the last of these complex mirrors, Europe has further reinforced its position as the world leader in silicon carbide mirror technology. ESA''s Gaia mission has passed another major milestone after the completion of 10 state-of-the-art mirrors that will be used to measure the precise positions of a billion stars.
12.5 Inch Telescope Mirror Kit
Save money and time by purchasing a telescope mirror kit. This kit includes an 12.5 inch telescope mirror blank, all the silicon carbide grits, white aluminum oxide powders, gugolz pitch, and cerium oxide polishyou will need to grind and polish an 12.5 inch telescope mirror all bundled in one spot. This will get you on a great start to building your own telescope.
Joy of Mirror Making: Introduction - BBAstroDesigns
Using silicon carbide grit, the curve can be achieved in hours, albeit with heavy damage to the mirror face by the grit particles. Polishing with a pliable material like pitch (first used by Isaac Newton three hundred years ago) results in a smooth polished surface, accurate to a fraction of a wavelength of light, that is ready to begin parabolizing.
Fabriing Large-scale Mirrors Using Reaction-bonded …
Indeed, this telescope—until recently the largest IR telescope mirror in the world—was brazed by 12 monolithic, sintered silicon carbide ceramics.5 In addition, in our group, we have been researching silicon carbide mirror manufacturing technologies since the
Stellafane ATM: Grits, Polish & Pitch
For hand grinding, the coarse grit sequence of 40, 60 , 80, 120, 220 is typical (start at the grit size appropriate for your mirror diameter as given in the section above). Silicon Carbide is used almost exclusively. Fine grit sequences vary more, and are often
Silicon Carbide | Definition of Silicon Carbide by Oxford …
‘The team from the university''s School of Engineering are the first to manufacture these engines in a durable, heat resistant material such as ceramic or silicon carbide.’ ‘Unlike conventional reflecting telescopes, Herschel''s telescope mirror is being made from a novel ceramic material called silicon carbide.’
EUCLID mirrors | AMOS
AMOS was contracted by Airbus for the polishing of five Silicon Carbide Mirrors for EUCLID. EUCLID is a space telescope with a optical diameter of 1.2m designed to study the Dark Universe. It will map the 3D distribution of two billion galaxies distributed over most of …
Why are telescope mirrors made of glass? - Astronomy …
Silicon carbide is a very popular material in newer space telescopes and is found in the optical system of too man of them for me to remeer, but here is mention of it in GAIA''s optical bench answer and in New Horizion''s LORRI telescope answer.