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image formation and accommodation

Ian P. Howard

in Perceiving in Depth: Volume 1 Basic Mechanisms

Published in print:
2012
Published Online:
May 2012
ISBN:
9780199764143
eISBN:
9780199949359
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199764143.003.0261
Subject:
Psychology, Vision, Cognitive Psychology

The quality of the retinal image depends on optical factors such as chromatic and spherical aberrations and on the spacing of the receptors. An account of these factors is followed by a description ... More


ELECTRON OPTICS

JOHN C. H. SPENCE

in High-Resolution Electron Microscopy

Published in print:
2008
Published Online:
January 2010
ISBN:
9780199552757
eISBN:
9780191708664
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199552757.003.0002
Subject:
Physics, Atomic, Laser, and Optical Physics

This chapter discusses the electron wavelength, relativistic effects, ray diagram for a typical electron microscope, simple electron optics theory and approximations for ideal lenses. The constant ... More


Barrel and Pincushion

Stephen R. Wilk

in Sandbows and Black Lights: Reflections on Optics

Published in print:
2021
Published Online:
April 2021
ISBN:
9780197518571
eISBN:
9780197518595
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780197518571.003.0021
Subject:
Physics, Atomic, Laser, and Optical Physics

One of the five basic optical aberrations is Distortion. Whether the Distortion aberration has a positive or negative sign determines whether it is described as “Pincushion” or “Barrel” distortion. ... More


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