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Measurement Tool

EuroPhotonics
Aug 2010
IB/E Optics Eckerl GmbHRequest Info
 
IB/E Optics Ing.-Büro Klaus Eckerl has released the OptiBench for fast modulation transfer function and distortion measurement. Also suitable for measuring telecentricity errors, the tool offers detection of the current paraxial data, including focal length and magnification. Its autofocus enables reproducible statements on working and image distance of the optics under test. The location of the optical axis also can be detected. It features live-picture capabilities of distortion to represent asymmetrical distortions during the assembly or manipulation of lens elements.


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GLOSSARY
distortion
A general term referring to the situation in which an image is not a true-to-scale reproduction of an object. The term also is used to connote the temporal alteration of the signal's waveform shape. There are many types of distortion. See also anamorphic distortion; curvilinear distortion; keystone distortion; panoramic distortion; perspective distortion; radial distortion; stereoscopic distortion; tangential distortion; wide-angle distortion.
image distance
The distance from the last surface of a lens system to the image. For a thin lens system, this distance is equivalent to the distance from the rear nodal point of a lens to the image.
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.
magnification
The ratio of the size of the image of an object to that of the object. The ratio of the linear size of the image to that of the object is lateral magnification. Angular magnification is the ratio of the apparent angular size of the image observed through an optical device to that of the object viewed by the unaided eye. Longitudinal magnification is the ratio of the longitudinal or axial dimension of an image to the corresponding dimension of the object.
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