Surveying instrument

Details Surveying instrument Surveying instrument

2005-09-20

2005-09-20

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Glare or unwanted light reduction

With mirror

C359S601000, C359S613000, C359S831000

Reexamination Certificate

active

06945657

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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