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Zoom Lens

Photonics Spectra
Jun 2010
Resolve Optics Ltd.Request Info
 
The Model 290 motorized nonbrowning zoom lens from Resolve Optics Ltd. operates in applications subject to radiation, such as nuclear fuel handling, reactor active zones and nuclear waste storage plants. It uses special glass that can withstand long-term exposure to radiation up to a dose of 100 million radians and temperatures to 55 °C without discoloration. The 6x lens features slip clutches and electronic noise suppression. Operating at f/1.8, it provides high image resolution and minimum geometric distortion from 400 to 750 nm, and it can image objects from 800 mm to infinity without using add-on adapters. When focused at infinity, the lens achieves high image resolution on-axis at full aperture throughout the zoom range without refocusing (image tracking). It is designed for use with single-chip 1/2- and 2/3-in. CCTV cameras and with Newvicon and Chalnicon tubes.


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GLOSSARY
aperture
An opening or hole through which radiation or matter may pass.
chalnicon
Proprietary name for a low-light-level TV pickup tube.
glass
A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides. Common window or bottle glass is a mixture of soda, lime and sand, melted and cast, rolled or blown to shape. Most glasses are transparent in the visible spectrum and up to about 2.5 µm in the infrared, but some are opaque such as natural obsidian; these are, nevertheless, useful as mirror blanks. Traces of some elements such as cobalt, copper and...
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.
radiation
The emission and/or propagation of energy through space or through a medium in the form of either waves or corpuscular emission.
zoom lens
An optical system of variable focal length, the focal plane remaining in a fixed position. This result is achieved by moving some of the components of the system along the lens axis, other components remaining stationary.  
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