Patent ID: 6980376
Filing Date: 2005-12-27
Classification: G02B,G03B

Abstract:
1. An iris diaphragm device for a microscope comprising: an iris diaphragm including a stationary mount ring, a rotatable adjusting ring, and a plurality of blades, the plurality of blades forming a diaphragm opening, the diaphragm opening being steplessly adjustable between a maximum size and a minimum size of the diaphragm opening by rotation of the adjusting ring; a coupling linkage connected to the adjusting ring and including at least a first and a second lever; an actuation element configured to drive the coupling linkage; and a closure element disposed on one of the first and second levers so that after a predefined size of the diaphragm opening has been established, upon a further actuation of the actuation element, the closure element pivots so as to cover the diaphragm opening.