FOCUS Inc.
русская версияabout company
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        SAINT-PETERSBURG          PETROPAVLOVSK-KAMCHATSKIY             SAO PAULO            


                             

 

PRODUCTION

optical components
  objectives
fine mechanical parts and assemblies
optical coatings and interference filters



SPHERICAL LENSES

The lens is the most basic optical component. Lenses collect light from a source and refract it to form a usable image of the source. The source may produce light itself, or it may be an illuminated object.
The material of the lens must be chosen on the basis of spectral transmittance of the system in which the lens will be used. If the system is not intended for work below 340 nm, the lens is best made from glass. If the system must work below 340 nm it is necessary to use fused silica.
We use the highest quality materials. They have an extremely low bubble and inclusions content.
We have a very large quantity of test glasses of spherical surfaces. There are about 4000 different specimens of test glasses at FOCUS Inc. Moreover we manufacture customized test glasses. Hence we can make almost any value of radius of curvature of spherical surface.


SPECIFICATIONS



FOCUS Inc.
1B, 5-th Upper street, Saint-Petersbourgh 194292, Russia
Phone:             +7-812-7154960          Phone/Fax:     +7-812-9328906
E-mail:              focus@focusinc.ru
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