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silicon carbide mirror in lithuania

Corion Filters & Mirrors — Mirror Resources: Repliion

Silicon Carbide. Large, light weight silicon carbide mirrors are often fabried for space and military appliions. Several different fabriion techniques are used to create silicon carbide substrates including reaction bonding, nitrogen bonding, direct sintered and chemical vapor deposition (CVD).

Development of silicon carbide mirrors: the example of the

Nov 21, 2017· Silicon Carbide has been selected for the SOFIA Secondary mirror to provide the lower mass and the higher stiffness. The final image quality corresponds to a point spread image of 1.5 arcseconds (80% energy) at 0.6 μm.

(PDF) Color Centers Enabled by Direct Femto-Second Laser

Dec 31, 2020· Using a 515 nm wavelength 230 fs pulsed laser, we produce large arrays of silicon vacancy defects in silicon carbide with a high localization within the …

Science Database | The lightweight silicon carbide mirror

The lightweight silicon carbide mirror of a new type Description. One of promising materials for space telescopes mirrors is silicon carbide ceramics. Complex of unique silicon carbide ceramic physical properties (small value to the thermal expansion coefficient, high heat conductivity and high specific inflexibility) allows expecting results.

Optics Products | II-VI Incorporated

These innovations complement our advances in high-durability dielectric coatings on copper, aluminum, nickel-plated, and brass-plated mirrors, both rigid and deformable. II-VI offers turnkey capabilities in optical design, fabriion, thin-film coatings, and metrology.

Science Database | The lightweight silicon carbide mirror

The lightweight silicon carbide mirror of a new type Description. One of promising materials for space telescopes mirrors is silicon carbide ceramics. Complex of unique silicon carbide ceramic physical properties (small value to the thermal expansion coefficient, high heat conductivity and high specific inflexibility) allows expecting results.

Joy of Mirror Making: Fine Grinding - BBAstroDesigns

Here is the 25 inch F2.6 being fine ground face-up with 220 silicon carbide grit. Notice that the mirror is supported by the tiled tool used to grind the backside regular with a kitchen non-slip rubber mat placed between. Here are 500 grit pits sparkling in the light remaining after two …

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Products | Spectrum Scientific

Our clean room production and test areas are space qualified, offering a silicone free environment for the manufacture of replied silicon carbide mirrors and ultra-low stray light gratings. We also manufacture a range of miniature spectrometers optimized for UV …

Advanced Silicon Carbide Materials

High Performance Optical Mirrors Made of CVC SiC® or Composites. Advanced Silicon Carbide Materials (ASCM) designs and manufactures high performance mirrors and telescopes made of CVC SiC® or composites. These precision-engineered optical products are used in a wide range of civilian, military and aerospace appliions.

World’s largest SiC mirror blank for telescope made in

Aug 22, 2018· A view of the devices used to make a silicon carbide (SiC) single mirror blank with a diameter of 4.03m at the CAS Changchun Institute of Optics, Fine Mechanics and Physics in …

Significant increase of UV reflectivity of SiC

Silicon carbide (SiC) galvanometer mirror scanners are widely used for high-speed laser scanning systems engineering. For bare SiC galvo-scanners, the working range and laser induced damage threshold (LIDT) are limited. In order to overcome these limits …

Silicon carbides - Nanoshel

Silicon Carbides is the only chemical compound of carbon and silicon. It was originally produced by a high temperature electro-chemical reaction of sand and carbon. Silicon carbide is an excellent abrasive and has been produced and made into grinding wheels …

Joy of Mirror Making: Fine Grinding - BBAstroDesigns

Here is the 25 inch F2.6 being fine ground face-up with 220 silicon carbide grit. Notice that the mirror is supported by the tiled tool used to grind the backside regular with a kitchen non-slip rubber mat placed between. Here are 500 grit pits sparkling in the light remaining after two …

Optical Surface Profiler | Nexview™ NX2

Silicon Carbide Mirror: see crystal grains and your polishing process fingerprint. Mx Software Screen. Automated 200 mm Measurement Stage. Watch: Learn how to set up and take a basic measurement on a Nexview optical profiler. Watch: Remarkable crash protection technology prevents damage to test sample and objective

SOLUTIONS FOR SPACE, ASTRONOMY, LASERS PROCESSES

obtained by pressureless sintering. This process leads to a silicon carbide that is completely free of non-coined silicon. l The very strong covalent Si-C bond gives Boostec® SiC exceptional physical properties that are par-ticularly reproducible and stable over time, l …

INTERNATIONAL COLLABORATION FOR SILICON CARBIDE …

scope used ZerodurTM for its secondary mirror (Moun-tain 1998). Their areal densities were 180 kg/m2 and 47 kg/m2, respectively (Kendrick & Stahl, 2008). Re-cently, JWST (the James Webb Space Telescope) uti-lized Be segmented primary mirrors with 14.5 kg/m2 of areal density (Kendrick & Stahl, 2008). To reduce areal density, Silicon Carbide (SiC

Bringing silicon carbide to the masses - News

Figure 3. A 100 mm diameter 3C-SiC-on-silicon (001) epiwafer grown using Advanced Epi''s low-temperature growth process. The mirror-like surface indies low roughness. The film''s colour is caused by the interference of light within the semi-transparent 3C-SiC epi-layer. It is an indior of the excellent thickness uniformity across the wafer.

Silicon Carbide Technologies for Lightweighted Aerospace

Silicon Carbide Technologies for Lightweighted Aerospace Mirrors 5a. CONTRACT NUER 5b. GRANT NUER 5c. PROGRAM ELEMENT NUER 6. AUTHOR(S) 5d. PROJECT NUER 5e. TASK NUER 5f. WORK UNIT NUER 3.2 Silicon Carbide-Based Mirrors . 2.

Razdan: Russia''s KH-11 class reconnaissance satellite

Dec 19, 2019· Work on silicon carbide mirrors in Russia is currently only in an experimental phase. Presumably, Razdan’s telescope is a Korsch three-mirror anastigmat, more specifically a Korsch type 2 configuration with an off-axis tertiary mirror.

Glass company list in Russia(Russian Federation)

abrasive materials,silicon carbide green 63c,electrocorundum white 23a,boron carbide,Boron Nitride Hexagonal,optical polishing powder optipol,glass microspheres for road covering glass beads,Glass Beads for Sandblasting,Zirconium electrocorundum of 38A,Silicon carbide black,boron nitride hexagonal,polirit abrasive optical dioxide of cerium,chromeTitaniferous Electrocorundum,cubic boron …

Silicon Carbide Products | Fine Ceramics (Advanced

Silicon Carbide products of . is the global leading manufacturer of superior precision Fine Ceramics (Advanced Ceramics) products.

MERSEN | Boostec® | silicon carbide | SiC | coating

Mersen Boostec''s unique know-how in the design and manufacture of silicon carbide parts extends the Mersen group''s range of equipment and solutions for extreme environments. Space and Astronomy Mersen Boostec provides SiC mirrors, SiC stable structures and also SiC focal plane hardware for telescopes to be used in space or on ground.

Sapphire, silicon carbide and lithium niobate laser

Laser scribing, dicing and other solutions for sapphire, silicon carbide and lithium niobate wafer micromachining.

INTERNATIONAL COLLABORATION FOR SILICON CARBIDE …

scope used ZerodurTM for its secondary mirror (Moun-tain 1998). Their areal densities were 180 kg/m2 and 47 kg/m2, respectively (Kendrick & Stahl, 2008). Re-cently, JWST (the James Webb Space Telescope) uti-lized Be segmented primary mirrors with 14.5 kg/m2 of areal density (Kendrick & Stahl, 2008). To reduce areal density, Silicon Carbide (SiC

Biconic Mirrors | II-VI Incorporated

Biconic mirrors have two different radii on one surface. It is possible to make a biconic mirror with spherical curves or aspheric curves, depending on the appliion and need to eliminate aberrations. When appropriately designed, they can replace common 90° bending mirrors to recollimate a laser beam in a long delivery path.

Silicon carbide │ Technical ceramics

Silicon carbide (SiC) is a high-performance ceramic material made of high-quality, non-oxide powders and can be manufactured to the specific requirements of a wide range of appliions. Due to its excellent tribological properties in coination with low weight, universal chemical resistance and ready availability, SiC is a frequently used

Optical Materials: Silicon carbide mirrors benefit high

Apr 01, 2008· After providing a laser of sufficient power, scan speed is determined primarily by the material and design of the scan mirror. Lightweight silicon carbide (SiC) mirrors offer clear advantages over alternatives such as glass or silicon mirrors, including high stiffness and high thermal conductivity — ideal for dynamic optomechanical systems. The key overall benefit of using SiC mirrors is the …

CERAFORM Silicon Carbide - Northrop Grumman

space-borne mirrors and structures, cryogenic mirrors, fast response scan mirrors, and high heat flux appliions, thanks to its unique coination of key enabling properties. CERAFORM SiC is an optical grade reaction bonded silicon carbide, consisting of a ceramic matrix of free silicon containing a . bimodal distribution of SiC grains.

High-performance grinding of a 2-m scale silicon carbide

Jul 05, 2016· Silicon carbide (SiC) is a competitive candidate material for building the space-based reflecting mirrors. However, SiC is also a typical difficult-to-machine material due to its extreme hardness. When SiC workpiece is machined by grinding, the wheel wears rapidly which leads to a deterioration of surface form accuracy. Grinding efficiency also becomes extremely low due to the …