Iris diaphragm

Details Iris diaphragm Iris diaphragm

2005-06-28

2005-06-28

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C359S894000, C396S452000, C396S505000, C396S493000, C396S510000

Reexamination Certificate

active

06912097

ABSTRACT:
An iris diaphragm comprising an annular base, an annular rotatable element and a number of leaves which can be mounted to form a variable aperture, each leaf extending between the base and element and being connected thereto in a pivotal relationship, is characterised in that a first end of each of said leaves is pivotally connected to an opening provided on the element or base by means of a burst hole joint, and a second end of each of said leaves being rotatably secured in a sliding relationship to a slide provided on the base or the element by means of a slide pin secured to the leaf.

REFERENCES:
patent: 3727531 (1973-04-01), Baab
patent: 4009946 (1977-03-01), Geyer et al.
patent: 4257086 (1981-03-01), Gulliksen
patent: 4306511 (1981-12-01), Ashby et al.
patent: 6102554 (2000-08-01), Wynne Willson et al.

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