1. Creation of first-rate manufacturing department for
production of paratellurite ( α-TeO2) crystals and
acoustooptic elements on this basis
LLC «GRAVITON»
Tver, RUSSIA

2. Our products
The enterprise is aimed at the production of paratellurite single crystals by the
method of Czochralsky and fabrication of acoustooptic components from the obtained
crystals.
The production includes: growth of crystal boules; X-ray orientation of the boules;
cutting and preparation of optical element workpieces; optical polishing and preparation of
optical elements.
The production of paratellurite single crystals can be converted and complemented
by the production of other technically important crystals such as lithium niobate, calcium
molybdate, lead tungstate, etc. , which are also based on the Czochralsky method of growth.
Uniquely large perfect
paratellurite crystals
Elements (light-
sound waveguides)
of paratellurite for
all types of
acoustooptic
devices
Technology of
paratellurite processing
(orientation→ cutting→
grinding → polishing
Technology of
paratellurite
crystal growth
Working principle
of acoustooptic
devices

3. Our market
Domestic and foreign producers of acoustooptic, optical and laser instruments on the base of
paratellurite
At the moment the market is not saturated!
Production increase of AO devices on
the base of paratellurite in Russia
World prices increase for 1 cm3 of raw
paratellurite crystals
• “Elent A” (Ukraine, Dnepropetrovsk)
• SISSAK(China)
Main competitors at the moment

4. Potential customers in RF and abroad:
• NTO IRE-Polus (Fryazino, RF)
• Centre of Laser tTechnologies (St-
Petersburg, RF)
• LLC “Laser Centre (Moscow, RF)
• Company Nano Lab (St-Petersburg, RF)
• “Sigma-Optic Plus” LTD (Zelenograd,
RF))
• FGUP NPO “Polus” (Moscow, RF)
• FGUP NPO “Astrofizika” (Moscow,
RF)
• NTC Akustooptiki MISIS (Moscow,
RF)
• Ryazansky priborny zavod (Ryazan,
RF)
• A & A (France)
• RAYLASE AG (Germany)
• LLC “NPP Lazerit”) (Ukraine)
• Brimrose Corp (USA)
• Newport (USA)
• Tobin (Japan)
Advantages of the products of LLC
“Graviton”»
• Large size of the crystals
• Uniquely low defect densities
• Perfect optical uniformity
• Perfect processing of optical surfaces
• Availability of patents and know-how

5. Kaplunov I.A.
• Succeeding director of several MIP, organized together
with several institutes of higher education oriented on
the production of optical crystals
• Author of 18 patents and 150 scientific papers related
Автор 18 изобретений и 150 научных работ, related
to the growth and study of crystals
• Doctor of Sci. (Techn.), Head of chair of applied
physics, Vice-rector on scientific and innovation
activity of Tver State University
• Widely known as an expert in the field of germanium
single crystal production and optical crystal properties
Kolesnikov A.I.
• Specialist with 25-year experience in conducting a
number of scientific and commercial projects related
to the growth and usage of paratellurite crystals
• Well known by his scientific papers on the problems
of light scattering and absorption in crystals
• Author of 14 patents and 150 papers on the problems
of crystal growth
• Candidate of Sci. (Phys.-Math.), dozent of Chair of
applied physics of Tver State University.
Grechishkin R.M.
• Specialist with 30-year experience in materials science
and scientific instrumentation, with a special emphasis
on domain structure and magnetooptics of magnetic
crystals and multiferroics , including quality control of
optical materials.
• Supervisor of 8 succesfully defended PhD
studies, author of 14 patents and more than 50 peer
reviewed papers. Leader of numerous projects
supported by international and domestic
funds, including RFBR (Russian Foundation for Basic
Research). Candidate of Sci. (Phys.-Math.), Professor
of Chair of applied physics of Tver State University.
Tretiakov S.A.
• Specialist in the methods of crystal growth.
• Author of 20 papers, know-how and computer
programs related to the properties of optical crystals.
Senior teacher of the Chair of applied physics of the
Tver State University
Among other participants of the team are qualified
specialists having experience in technical, administrative
and commercial activity, including enthusiastic young
people below 30 having pretentious plans to launch into
business.
Main participants

6. Achievements of the team in the last 4 years (2009-2012)
• Organization of small innovation enterprise “Graviton” (supported by the Foundation of
promotion for the development of small enterprises in the field of science and engineering)
• Organization of small innovation enterprise “Fotonika”
• Getting support from the Foundation of promotion investments to the subjects of small and
average entrepreneurship in scientific-technical and technological spheres of the Tver
region “Start-up Fund”
• Realization of economical contracts and grants with a total of $800,000
• Preparation and shipping to the customers of paratellurite elements for a number of
acoustooptic devices including those for unique domestic and international projects
GLONASS, Mars-Express and Venus-Express.

7. Required investment
Three growth units
$ 1.300.000-
1.600.000 Crucibles
$ 200.000
Raw materials – tellurium
dioxide
$ 600.000
Accommodation
$ 400.000
Advertisement, promotion into the
market
$ 200.000
Investment
$ 2.700.000 – 3.000.000
Planned parameters:
• Cost recovery - 4-5 years
• Price for 1 cm3 of raw paratellurite crystal before processing – $60-120
• Profitability – 35-50%
• Annual production – 40-50 kg