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P3D ortho

  • From: John Toeppen <toeppen@xxxxxxxx>
  • Subject: P3D ortho
  • Date: Sun, 19 Dec 1999 19:25:13 -0700
Orthoscopic FYI:

Zeiss page:
http://www.company7.com/zeiss/products/czabbeoclr.html

defines orthoscopic: 
"The design of Orthoscopic eyepieces dates back to the 1800s when Ernst
Abbe first designed them to be used for accurate measurements of linear
distance on microscope slides. The term "orthoscopic" denotes an
eyepiece that introduces no barrel or pincushion distortion, so that an
object will have the same size when observed anywhere in the field of
view. The Abbe design employs a triplet field lens and a singlet
eyelens. "

Boris has a page on the topic:
http://starosta.com/3dshowcase/ireal.html

John Toeppen