Infrared Imaging Abstracts: 1999

The following Abstracts of journal literature and patent specifications are taken, with kind permission, from Imaging Abstracts, published by Pira International on behalf of The Royal Photographic Society of Great Britain. These abstracts are dated up to 2003 and this facility is no longer maintained.

The abstracts are Copyright © 1997-2004 Pira International on behalf of the RPS. Original documents are in English unless otherwise stated. The abstracts published here are those which cover aspects of Infrared imaging and are made available here for informational purposes only. No liability can be accepted for the accuracy of the information given or any use that is made of it.

2 results found

Infrared Camera Lens

Koyama M (Nikon Corp)
Patent: US 5,909,307 - 01 June 1999

A lens for use in an infrared camera contains two main lens groups, which from the object side have negative and positive refractive powers, respectively. The first lens group consists of a negative meniscus lens with a convex surface facing the object side; the second lens group contains three lens sub-groups, with positive, negative and positive refractive powers, respectively.

Wide Band Infrared Camera Lens

Zhang S (Nikon Corp)
Patent: US 5,940,224 - 17 August 1999

A lens system for use in a wide band infrared camera has an effective bandwidth of from 1 to 5 µm. It contains two groups of lens elements, and an aperture stop which coincides with a cold stop of the lens system, which has a 100% cold stop efficiency.