Iris diaphragm, iris diaphragm driving device and camera unit having the same, and iris diaphragm control method
AssigneeSamsung Electronics Co., Ltd.
InventorEui-kuen Oh
Life of this patent
Estimating the term…
Abstract
An iris diaphragm includes at least one lens shutter to adjust the size of an aperture that incident light passes through according to movement of the at least one lens shutter. At least one ND filter is installed to move independently of the lens shutter to reduce the amount of incident light by covering the aperture stopped-down by the lens shutter according to the movement of the at least one ND filter.
Claims35
An iris diaphragm of image photographing equipment, comprising:
- at least one lens shutter disposed in a light path to adjust the amount of incident light by opening and closing the light path according to movement thereof;
- and
- at least one ND filter independently movable with respect to the lens shutter to reduce the amount of incident light according to movement thereof in the light path that is opened by the lens shutter.
An iris diaphragm driving device for image photographing equipment, comprising:
- at least one lens shutter to open and close a light path;
- at least one ND filter movable independently of the at least one lens shutter to reduce the amount of incident light passing through the light path;
- and
- a driving unit to drive the at least one lens shutter and the at least one ND filter.
A camera unit, comprising:
- a lens barrel;
- a zoom lens module housed in the lens barrel;
- a focusing lens module housed in the lens barrel;
- at least one lens shutter movably installed between the zoom lens module and the focusing lens module to adjust an aperture that light passes through in response to movement of the zoom lens module and the focusing lens module;
- an ND filter movably installed inside the lens barrel to reduce the amount of incident light by covering the aperture that is stopped down by the at least one lens shutter;
- and
- a driving unit installed inside the lens barrel to drive the at least one lens shutter and the ND filter.
A method of controlling an iris diaphragm, the method comprising the steps of
- moving at least one lens shutter to stop down an aperture that incident light passes through;
- and
- moving at least one ND filter to cover the stop-down aperture to reduce the amount of incident light, wherein the decrement of incident light is fixed or varied according to a change of the aperture size.
Dependencies are inferred from the claim text.