Optical assemblies for endoscopic stereo visualization
AssigneeCilag GmbH International
InventorsShaohong Wang, Svitlana Berezhna
Life of this patent
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Abstract
Stereo visualization systems with objective lens assemblies for endoscopic visualization. A system include an endoscope tube and an optical assembly disposed within an interior cavity defined by the endoscope tube. The optical assembly includes a negative lens comprising a negative focal length, a positive lens group comprising at least one convex lens, and a beam folding prism that directs a beam of electromagnetic radiation on to a pixel array of an image sensor.
Claims20
A system for endoscopic visualization, the system comprising:
- an endoscope tube;
- and
- an optical assembly disposed within an interior cavity defined by the endoscope tube, the optical assembly comprising:
- a negative lens comprising a negative focal length;
- an aperture stop plate;
- a direction-of-view prism;
- a positive lens group comprising at least one convex lens;
- and
- a beam folding prism that directs a beam of electromagnetic radiation onto a pixel array of an image sensor;
- wherein, along an optical axis of the optical assembly, the negative lens, the aperture stop plate, the direction-of-view prism, and the positive lens group are arranged sequentially.
A system for endoscopic visualization, the system comprising:
- an endoscope tube;
- and
- an optical assembly disposed within an interior cavity defined by the endoscope tube, the optical assembly comprising:
- a negative lens comprising a negative focal length;
- a plate;
- an angle-selecting prism comprising a coating that reflects a beam of electromagnetic radiation;
- a positive lens group comprising at least one convex lens;
- and
- a beam folding prism that directs a beam of electromagnetic radiation onto a pixel array of an image sensor.
A system comprising:
- an endoscope tube;
- a processor;
- and
- an optical assembly disposed within an interior cavity defined by the endoscope tube, the optical assembly comprising:
- a negative lens comprising a negative focal length;
- a positive lens group comprising at least one convex lens;
- and
- a beam folding prism that directs a beam of electromagnetic radiation onto a pixel array of an image sensor;
- wherein the processor corrects optical effects introduced by the beam folding prism.
Dependencies are inferred from the claim text.