Endoscope apparatus
AssigneeOlympus Optical Co., Ltd.
InventorHaruko Igarashi
Life of this patent
Estimating the term…
Abstract
An endoscope apparatus having an insertion part which includes an object optical system in order to conduct measurements or stereoscopic-vision observations, using the object optical system with a moderate parallax, a moderate size of an image can be provided without making an endoscope thick in diameter.
Claims6
An endoscope apparatus which includes an object optical system to conduct measurements or stereoscopic-vision observations, said object optical system comprising:
- a pair of negative lenses;
- a first pair of positive lenses;
- a brightness diaphragm;
- a second pair of positive lenses;
- and
- an image-pick-up device for forming an object image, said elements being arranged in order from an object side, wherein
- a pair of optical axes are defined by said pair of negative lenses, said first pair of positive lenses and said brightness diaphragm, and
- wherein the lenses of said second pair are arranged inwardly eccentrically with respect to said pair of optical axes.
An endoscope apparatus which includes an object optical system to conduct measurements or stereoscopic-vision observations, said object optical system comprising:
- a pair of negative lenses;
- a first pair of positive lenses;
- a brightness diaphragm;
- a second pair of positive lenses;
- and
- an image-pick-up device for forming an object image, said elements being arranged in order from an object side, wherein
- a pair of optical axes are defined by said pair of negative lenses, said first pair of positive lenses and said brightness diaphragm,
- wherein the lenses of said second pair are arranged inwardly eccentrically with respect to said pair of optical axes, and
- wherein the following conditional expression is satisfied:
- 0.03L<d<2L (2)
- wherein d represents the optic-axial distance of said pair of optical axes at said object side, and
- L represents the best observation distance of said object optical system.
Dependencies are inferred from the claim text.