Video-type stereoscopic microscope including movable field stop frame and holder
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorEiichi Ito
Life of this patent
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Abstract
Right and left image taking optical systems are respectively composed of an objective optical system forming an image of an object, and a relay optical system relaying the image formed by the objective optical system on the corresponding region on the CCD. At the surface of the image formed through each of the objective optical system, a field stop is disposed to shield a region on the CCD that does not correspond to itself. Each of the field stops is embedded in a field stop frame. The field stop frame penetrates the corresponding field stop holder in the vertical direction and is rotatably held. Each of the field stop holders is movably supported by a base frame such that it can slide in a direction perpendicular to the optical axes of both of the objective optical systems.
Claims11
A video-type stereoscopic microscope in which images of same object are formed through a pair of image taking optical systems arranged with a predetermined base length therebetween on two regions into which an image taking surface of an image pickup device is divided in a direction of said base length, and in which the images are picked up by said image pickup device, each of said image taking optical systems comprising:
- an objective optical system that forms a primary image of an object;
- a relay optical system that relays the primary image formed by said objective optical system to form a secondary image;
- an inter-axis distance reducing element that brings the object light rays from said relay optical system close to each other;
- a field stop that shields a space which is conjugate, with respect to said relay optical system, with a region in said image taking surface that corresponds to the other image taking optical system, when disposed at a predetermined position in a plane on which said primary image is formed by said objective optical system;
- a field stop frame that holds said field stop in its inner space;
- a field stop holder that holds said field stop frame such that said field stop frame can be rotated in a plane perpendicular to an optical axis of said objective optical system;
- and
- a support mechanism that supports said field stop holder such that said field stop holder can slide in a direction perpendicular to the optical axis of said objective optical system while maintaining an rotational axis of said field stop frame in parallel with the optical axis of said objective optical system.
Dependencies are inferred from the claim text.