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Optical Lenses

Photonics Spectra
Sep 2010
Bern Optics Inc.Request Info
 
For use in analytical and medical instrumentation applications, Bern Optics Inc. has announced the availability of submillimeter optical lenses as small as 0.20 mm. These precision lenses can be ground and polished in a variety of difficult configurations, including planoconvex, planoconcave, biconcave, biconvex, and positive and negative meniscus. Created from optical and filter glasses, these microscopic elements – some as small as a grain of salt – can be produced with spherical and cylindrical radii with submillimeter curvatures and diameters. They are used in endoscopic medical devices and in other optical instrumentation that requires precision and high quality.


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GLOSSARY
curvature
The measure of departure from a flat surface, as applied to lenses; the reciprocal of radius. Applies to any surface, including lenses, mirrors and image surfaces.
endoscope
A medical instrument used to view inside the human body by inserting the instrument into a natural or created aperture. The endoscope may use a coherent fiber optic bundle or conventional optics to relay the image to the eye or a television camera. Illumination is provided by a concentric bundle of noncoherent fiber optics.  
lens
A transparent optical component consisting of one or more pieces of optical glass with surfaces so curved (usually spherical) that they serve to converge or diverge the transmitted rays from an object, thus forming a real or virtual image of that object.
microscope
An instrument consisting essentially of a tube 160 mm long, with an objective lens at the distant end and an eyepiece at the near end. The objective forms a real aerial image of the object in the focal plane of the eyepiece where it is observed by the eye. The overall magnifying power is equal to the linear magnification of the objective multiplied by the magnifying power of the eyepiece. The eyepiece can be replaced by a film to photograph the primary image, or a positive or negative relay...
optical glass
A glass that, during manufacture, is carefully controlled with respect to composition, melting, heat treatment, and other processing, to render its optical characteristics, such as its index of refraction, dispersion, transmittance, spectral transmittance, homogeneity, freedom from birefringence, permanence, etc., sufficient for its optical application.
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