 6m diameter blank melting | Our company has in its disposal the considerable science-technical and unique production capacity for manufacturing of large-size optical components and the facilities that enable manufacturing technological cycles fulfillment as follows: |
Our company can supply as well blanks made of Astrositall® and high-precision figured optical components. Other optical materials as Zerodur, ULE, Quartz, etc can be polished and treated in our facilities. We are ready to review any your inquiry and accept your requirements.
Completed international projects for manufacturing of large optics for Astronomy and Science applications
By resent time LZOS successfully produced a wide range of large-size optical components with flat and a-spherical working surfaces and diameter up to 2 meters having accuracy RMS to 0.015 lambda (lambda=0.6328 micrometers).
Among performed components there are light-weighted some (weight reduction up to 80%) and thin optical parts as well axis and off-axis having random shape of external perimeter.
Vista M1 and M2 astronomical mirrors
 | Project VISTA (Visible and Infrared Survey Telescope for Astronomy), the contract for manufacturing and figuring of the unique high-aperture surfaces of the Primary mirror (diam. 4100 mm, top radius aprox. 8 m, a-sphericity value about 881 nu m made of ZERODUR® substrate, SCHOTT Company and the Secondary mirror (diameter 1240 mm, a-sphericity aprox. 364 nu m, made of Astrositall® substrate). The mirrors have been successfully completed by 2006 and installed in ESO Observatory, Paranal. (www.eso.org/instruments). Information about VISTA telescope is presented in web-sites:
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Project LAMOST
| Project LAMOST (Large Sky Area Multi-object Fiber Spectroscopic). The contract for figuring and treatment of 40 sub-mirrors of segmented MB and casting and fabrication of 26 blanks made of Astrositall® intended for MA sub-mirrors was completed. LAMOST telescope the largest in China was commissioned in 2008year near Beijing. |
sub-mirror testing in test-bench with Fizeau lens |
 | In 2001 the contract for manufacturing of the unique set of optics intended for VLT Telescope was (VLT Survey Telescope, Osservatorio Astronomico di Capodimonte Napoli, http://oacosf.na.astro.it/vst/) . The Primary mirror has diameter 2650 mm and the Secondary one - 938 mm having a-sphericity aprox. 100 microns at each the mirrors. The primary mirror VST is an adaptive one and manufactured in shape of meniscus with thickness 140mm, and having thickness to diameter ratio as 1:19. Nowadays LZOS company is producing the second similar mirror. |
Primary mirror figuring | 1.2 m optical system for Telescope STELLA, Astronomical institute of Potsdam (www.aip.de/stella/) is manufactured under the contract with Carl Zeiss for firm Halfmann (www.halfmann-teleskoptechnik.com/htm/telescopes.htm). The mirrors are made of ZERODUR®, Schott company. The primaru mirror D=1220 mm, the Secondary mirror D=455mm, the tertiary mirror D=350x250mm. Wave-front RMS after subtraction of constant ratios, disfocusing tilts and de-centering coma is about 0.03 lambda (lambda=632.8 nm). |
 | Within period 1997-2001 years under Carl Zeiss contract our company manufactured 4 Primary mirrors with hyperbolic surfaces having 2050 mm and 2 Secondary mirrors having diameters 645 mm of Astrisitall material intended for TTL Project (Telescope Technologies Limited, Great Britain) (www.ngat.com/fulman1.htm). Asphericity of the nearest sphere on the Primary mirror is about 20 microns; on the second one is about 12 microns. RMS Wave-front of the Primary mirrors is aprox. 0.03 lambda (lambda=0.6328 microns). The similar quality was obtained on the secondary mirrors. Completely computer-controlled telescopes are built in Canaries islands (Liverpool Telescope, http://www.telescope.livjm.ac.uk), in India (iucaa.ernet.in), Hawaiian Islands and Australia (Faulkes Telescopes www.faulkes-telescope.com). |
LZOS Company as a sub-contractor of Carl Zeiss, Jena (www.zeiss.de) manufactured the set of optics ARISTARCHOS of NOA Telescope (Astronomical Institute - National Observatory of Athens, Greece, www.noa.gr, www.astro.noa.gr/ASC_2.3m/ngt_main.htm) that is composed of The Primary mirror diameter 2280 mm, the Secondary mirror diameter 753 mm and tree-lenses field corrector. A-sphericity of the Primary mirror is aprox. 40 microns, the Secondary one – 26 microns. The mirrors system: Primary and Secondary has EE 80% in the spot less than 0.3" |  |
 | In 2003 year our company completed fabrication of optics for two Schmidt systems with spherical mirror diameter aprox. 600 mm (radius of curvature is 1294 mm) and Schmidt plate with diameter 424 mm. Schmidt plate has a-sphericity value about 84 microns of the nearest sphere with 19800 mm. The spherical mirror and compensating elements are produced separately and final testing, Schmidt plate fabrication was carried out in optical lay-out with a large-size objective. RMS (WFE) at wavelength lambda = 633 nm is less than 0.05 lambda. |
| In 2003 year the optical collimator with 30 m focal length was produced with following parameters: flat D=1250 mm, parabola D=1100 mm, hyperbola D=188 mm, flat D=135 mm. |
Within 1999-2002 years period LZOS Company as a sub-contractor of Carl Zeiss (Germany) manufactured two Secondary mirrors with diameters 645 mm (F/2.5) for TTL Project (Telescope Technologies Limited, Great Britain). Asphericity is about 12 microns of the nearest matching sphere. RMS of Surface is about 9 nm. The mirrors system : The Primary and The Secondary have EE 80% in spot less than 0.2". The secondary mirror is manufactured and figured with diameter 753 mm (F/2) for NOA (Astronomical Institute - National Observatory of Athens, Greece). Asphericity is about 26 microns. RMS of surface is aprox. 12 nm. The telescope viewing field is about 1.04o. The mirrors system: Primary and Secondary has EE80% in spot less than 0.3". |
Convex hyperbolic mirrors testing measurements in two Hindle spheres |
