Optical Adaptor
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United States of America Patent
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Issued Date -
Nov 24, 2011
app pub date -
Feb 10, 2010
filing date -
Feb 16, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An optical adaptor is disclosed for use in combination with an optical imaging system. The adaptor is specifically configured so that when it is positioned within the optical path between an object and the imaging system, the adaptor corrects the field curvature of the imaging system so as to produce a substantially flat image of a curved object. The adaptor comprises a primary lens unit of positive power which in use is towards the object and which preferably takes the form of a thick meniscus lens having an overcorrect Petzval Sum, and a secondary lens unit of negative power which in use is towards the imaging system and which preferably takes the form of a relatively thin meniscus lens.
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