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US 10,120,181 B2Granted
Optical unit and endoscope
AssigneeOlympus Corporation
InventorsShinya Kono, Takehiko Iguchi
Life of this patent
Estimating the term…
Abstract
The optical unit is including a tubular fixed part, a front frame part, a back frame part, a movable part, and a voice coil motor that is capable of moving the movable part relatively with respect to the fixed part in a direction of the axis by a coil located in the fixed part and a magnet located in the movable part and magnetically polarized in a direction orthogonal to the axis, wherein at least a part of the movable part is included in a portion of the front frame part projected in the axis direction.
Claims12
An optical unit comprising:
- a tubular fixed part with a given axis as center;
- a front frame part that holds a front lens group in place and is attached to an object side of the fixed part with the axis as center;
- a back frame part that holds a back lens group in place and is attached to an image side of the fixed part with the axis as center;
- a movable part that holds a moving lens group in place and is located inside the fixed part with the axis as center;
- and
- a voice coil motor that is capable of moving the movable part relatively with respect to the fixed part in a direction of the axis by a coil located in the fixed part and a magnet located in the movable part and magnetically polarized in a direction orthogonal to the axis,
- wherein:
- at least a part of the movable part is included in a portion of the front frame part projected in the axis direction, and
- at least a part of the front frame part is inserted on an inner circumference side of the movable part.
6 more elements
Dependencies are inferred from the claim text.