Surveying instrument
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 20, 2005
Grant Date -
May 2, 2002
app pub date -
Oct 18, 2001
filing date -
Oct 19, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surveying instrument includes a sighting telescope having an objective lens and an eyepiece; an erecting optical system functioning so that an image formed by said objective lens is viewed as an erect image through the eyepiece; and a light shield device, positioned in an optical path extending from an incident surface of the erecting optical system to an exit surface of the erecting optical system, for preventing an off-field light bundle which is incident on the erecting optical system from reaching the eyepiece.
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Family
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Cited Art Landscape
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