Foldable eyepiece cup

Details Foldable eyepiece cup Foldable eyepiece cup

2006-09-12

2006-09-12

Nguyen, Thong Q (Department: 2872)

Optical: systems and elements

Glare or unwanted light reduction

Barrel end or lens mount shade

C359S511000, C359S600000, C396S448000, C396S534000

Reexamination Certificate

active

07104658

ABSTRACT:
A cup for an eyepiece of an optical observation instrument, comprises a peripheral wall which includes an eyepiece-connecting section for connection of the cup to an eyepiece, a transition section which adjoins the eyepiece-connecting section, a light-protecting attachment which, by way of a sectional part of the transition section, is joined to a side of the transition section that is turned away from the eyepiece-connecting section; a sight hole which is laterally defined by the peripheral wall; the peripheral wall being movable into a first, non-folded end position for someone who does not wear spectacles for preclusion of any incidence of stray light upon an eyepiece lens, and into a second, folded end position for spectacle wearers; and into a third stable position of ventilation, located between the first and the second end position, for someone not wearing spectacles.

REFERENCES:
patent: 4307931 (1981-12-01), Blake
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patent: 4698857 (1987-10-01), Kastendieck et al.
patent: 5225932 (1993-07-01), Wannagot et al.
patent: 5784207 (1998-07-01), Satoh
patent: 243 126 (1987-02-01), None
patent: 1 116 979 (2001-07-01), None
patent: 526605 (1940-09-01), None
patent: 07-43616 (1995-02-01), None

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