Endoscope video adapter with zoom
First Claim
1. A device for coupling a video camera to an endoscope or borescope for recording and displaying images, the device comprising:
- a clamp adapted to attach the device to the endoscope or borescope;
a plurality of separate mounts adapted releasably to attach the device to different video cameras so that a suitable mount can be selected from the plurality of mounts to couple a mount receiver of the camera to the device;
a lens system disposed in an optical path between the clamp and the mount, the lens system comprising first and second positive lens groups which are movable along the optical path;
a zoom actuation handle;
a zoom mechanism coupling the zoom actuation handle to the first and second lens groups, the zoom mechanism adapted to move the first and second lens groups simultaneously and in the same direction along the optical path in particular relationship relative to each other when the zoom actuation handle moves throughout a handle movement range so that the images transmitted along the optical path vary in magnification within a zoom range, and so that an image position remains substantially constant when the zoom mechanism varies magnification throughout the zoom range; and
wherein the lens system further comprises a focusing lens group, comprising a movable and a fixed lens, and further comprising a focus mechanism which moves the movable lens along the optical path to vary the object distance, the focus mechanism being movable independently of the magnification of the images.
1 Assignment
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Accused Products
Abstract
An adaptor for coupling a video camera to an endoscope, borescope, or the like includes a focusing mechanism and an independent zoom or magnification variation adjustment mechanism. The zoom mechanism will move two lens groups along an optical path simultaneously, but at different speeds. Each lens groups preferably includes a pair of lenses affixed together as a doublet. By controlling the position of the doublets relative to a pair of focusing lenses, the present adaptor provides an optically compensated zoom mechanism which allows changes in the magnification of the adaptor throughout a wide magnification range without having to refocus the adaptor.
41 Citations
14 Claims
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1. A device for coupling a video camera to an endoscope or borescope for recording and displaying images, the device comprising:
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a clamp adapted to attach the device to the endoscope or borescope; a plurality of separate mounts adapted releasably to attach the device to different video cameras so that a suitable mount can be selected from the plurality of mounts to couple a mount receiver of the camera to the device; a lens system disposed in an optical path between the clamp and the mount, the lens system comprising first and second positive lens groups which are movable along the optical path; a zoom actuation handle; a zoom mechanism coupling the zoom actuation handle to the first and second lens groups, the zoom mechanism adapted to move the first and second lens groups simultaneously and in the same direction along the optical path in particular relationship relative to each other when the zoom actuation handle moves throughout a handle movement range so that the images transmitted along the optical path vary in magnification within a zoom range, and so that an image position remains substantially constant when the zoom mechanism varies magnification throughout the zoom range; and wherein the lens system further comprises a focusing lens group, comprising a movable and a fixed lens, and further comprising a focus mechanism which moves the movable lens along the optical path to vary the object distance, the focus mechanism being movable independently of the magnification of the images. - View Dependent Claims (2, 3, 4, 5)
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6. A device for coupling a video camera to an endoscope or borescope for recording and displaying images, the device comprising:
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a clamp adapted to attach the device to the endoscope or borescope; a plurality of separate mounts adapted releasably to attach the device to different video cameras so that a suitable mount can be selected from the plurality of mounts to couple a mount receiver of the camera to the device; a lens system disposed in an optical path between the clamp and the mount, the lens system comprising first and second lens groups which are movable along the optical path; a focusing lens group, comprising a movable lens and a fixed lens, and a focus mechanism, the focus mechanism moving the movable lens along the optical path to vary the object distance, the focus mechanism being movable independently of the magnification of the images; and a zoom mechanism adapted to move the first and second lens groups along the optical path so that the images transmitted along the optical path vary in magnification within a zoom range, and so that an image position remains substantially constant when the zoom mechanism varies magnification throughout the zoom range;
the first and second lens groups being positive cemented doublets in the optical path from the focusing lens group, and wherein the zoom mechanism moves the first and second doublets simultaneously and in the same direction throughout the zoom range so that the doublets vary the magnification without varying the image position. - View Dependent Claims (7, 8)
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9. An adapter for coupling a video camera with an endoscope to record images from within a patient body, the adapter comprising:
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a clamp adapted to attach the adapter to the endoscope; a mount adapted to attach the adapter to the video camera; a focusing lens group including movable and fixed lenses disposed in an optical path from the clamp to the mount, at least one of the lenses being negative, and a focus mechanism coupled to the movable lens so as to move the movable lens to vary the object distance; a first lens group disposed in the optical path from the focus system; a second lens group disposed in the optical path from the first lens group; a zoom mechanism coupled to the first and second lens groups and adapted to move the lens groups along the optical path simultaneously and in the same direction to vary magnification of the images without varying the object distance; wherein the first and second lens groups comprise positive cemented doublets; wherein the zoom mechanism comprises a tubular body disposed about the optical path, the body having first and seconds slots, a first pin coupled to the first lens group and engaging the first slot so that the first slot repositions the first lens group when the body rotates, and a second pin coupled to the second lens group and engaging the second slot so that the second slot repositions the second lens group when the body rotates; and wherein the optical path between the clamp and the mount includes no more than six non-planer optical elements. - View Dependent Claims (10, 11)
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12. An adapter for coupling a video camera to an endoscope, the adapter comprising:
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a body defining two opposed ends and an optical path extending between the ends and through which an optical image can be passed; a zoom lens group consisting of first and second positive lens groups mounted within the body to be displaceable so as to vary magnification of the image; a focusing lens group consisting of a positivelens and a negative lens, the positive and the negative lens being mounted within the body so that one of the lenses is movable relative to the other so as to focus the image; and wherein the negative lens of the focusing lens group is fixed, and wherein the positive lens is movable relative to the negative lens so as to focus the image. - View Dependent Claims (13, 14)
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Specification