Three-Dimensional-Endoscope Optical System
AssigneesOlympus Corporation, Olympus Medical Systems Corp.
InventorsTakayoshi Togino, Ikutoshi Fukushima, Yasushi Namii, Mitsujiro Konno
Life of this patent
Estimating the term…
Abstract
Provided is a three-dimensional-endoscope optical system that is provided with two objective optical systems having optical axes, which are arranged with a spacing therebetween, and that satisfies the following conditions: 0.5 mm<OP<1.5 mm (1); 3 mm<D<200 mm (2); α<10° (3); and 110°<ω<180° (4), where OP is a spacing between the optical axes of optical members at the most distal ends of the objective optical systems, D is a depth of field, α is an angle of convergence (inward angle) of the depth of field D when performing near-point observation, and ω is an angle of view of the objective optical systems.
Claims14
A three-dimensional-endoscope optical system comprising:
- two objective optical systems having optical axes that are arranged with a spacing therebetween;
- two lens groups that are disposed with a spacing therebetween in an optical-axis direction and that are disposed so as to be decentered relative to each other;
- and
- an optical-axis deflecting member that is disposed between the two lens groups and that deflects light that has passed through one of the two lens groups so as to make the light enter the other of the two lens group,
- wherein two optical images are simultaneously formed in a same plane, and the following conditions are satisfied:
- 0.5 mm<OP<1.5 mm (1);
- 3 mm<D<200 mm (2);
- α<10° (3);
- and
- 110°<ω<180° (4),
- where
- OP is a spacing between the optical axes of optical members at the most distal ends of the objective optical systems,
- D is a depth of field,
- α is an angle of convergence (inward angle) of the depth of field D when performing near-point observation, and
- ω is an angle of view of the objective optical systems.
Dependencies are inferred from the claim text.