The invention relates to binoculars and a method for adjusting an interpupillary distance of binoculars, comprising a first housing half having a first eyepiece with a first optical axis, a second housing half having a second eyepiece with a second optical axis, wherein the distance of the first optical axis to the second optical axis defines an interpupillary distance and wherein the first housing half and the second housing half are hingedly connected to each other by means of at least one folding bridge and wherein the folding bridge comprises a first folding bridge portio coupled with the first housing half and a second folding bridge portion coupled with the second housing half and wherein the interpupillary distance may be changed by pivoting the two housing halves and wherein a detection device is formed, by means of which the interpupillary distance may be determined.

A lens driving device includes two pairs of an image-stabilization coil part and an image-stabilization magnet part disposed along a first side and a second side that are adjacent to each other, respectively. An autofocus movable part is disposed eccentrically with respect to a central axis along the direction of the optical axis. An image-stabilization fixed part includes connection terminal parts that are respectively disposed on the first side and the second side, and are connected to power supply wiring of the image-stabilization coil part.

An operation dial is disposed so as to swing between two barrels. The operation dial has a plurality of finger gripping portions that protrudes so as to be inclined with respect to the two barrels. The operation dial is urged by a torsion coil spring to a state in which the two finger gripping portions have the same tilt angle with respect to the two barrels. A reception member is pushed by rotation of the operation dial in one direction and rotation of the operation dial in the other direction due to a swing operation for the finger gripping portions. A switch main body is opened or closed by the pushing of the reception member.

An operation dial is disposed so as to swing between two barrels. The operation dial has a plurality of finger gripping portions that protrudes so as to be inclined with respect to the two barrels. The operation dial is urged by a torsion coil spring to a state in which the two finger gripping portions have the same tilt angle with respect to the two barrels. A reception member is pushed by rotation of the operation dial in one direction and rotation of the operation dial in the other direction due to a swing operation for the finger gripping portions. A switch main body is opened or closed by the pushing of the reception member.

An optical apparatus includes a pair of first driving force generators that generates a driving force to the movable member in a first direction orthogonal to optical axes of a pair of objective optical systems, and a second driving force generator that generates a driving force to the movable member in a second direction orthogonal to the optical axes of the pair of objective optical systems and the first direction. The pair of first driving force generators are provided between a first line segment passing through the optical axes of the pair of objective optical systems and a second line segment passing through the optical axes of the pair of eyepiece optical systems or on at least one line segment of the first line segment and the second line segment. The second driving force generator is provided between the pair of image stabilization optical systems.

An optical apparatus includes a pair of first driving force generators that generates a driving force to the movable member in a first direction orthogonal to optical axes of a pair of objective optical systems, and a second driving force generator that generates a driving force to the movable member in a second direction orthogonal to the optical axes of the pair of objective optical systems and the first direction. The pair of first driving force generators are provided between a first line segment passing through the optical axes of the pair of objective optical systems and a second line segment passing through the optical axes of the pair of eyepiece optical systems or on at least one line segment of the first line segment and the second line segment. The second driving force generator is provided between the pair of image stabilization optical systems.

An optical apparatus having a pair of lenses spaced from each other in a first direction and movable in a second direction orthogonal to the first direction includes a movable member configured to hold the pair of lenses and to move in a second direction together with a female thread member, and a guide configured to guide a movement of the movable member in the second direction relative to the base member, where a first plane includes an optical axis of each of the pair of lenses, the guide being located at a position on or along a second plane that is orthogonal to the first plane and includes a central axis of the male thread member.

An optical apparatus having a pair of lenses spaced from each other in a first direction and movable in a second direction orthogonal to the first direction includes a movable member configured to hold the pair of lenses and to move in a second direction together with a female thread member, and a guide configured to guide a movement of the movable member in the second direction relative to the base member, where a first plane includes an optical axis of each of the pair of lenses, the guide being located at a position on or along a second plane that is orthogonal to the first plane and includes a central axis of the male thread member.

An example head-mounted display device includes a light projector, an optical assembly arranged to direct light from a light projector to a user, and an actuator module. The optical assembly includes a variable focus lens assembly including a rigid refractive component, a shaper ring defining an aperture, and a flexible lens membrane between the shaper ring and the rigid refractive component and covering the aperture. The refractive component, the shaper ring, and the lens membrane are arranged along an axis. The refractive component and the lens membrane define a chamber containing a volume of fluid. The actuator module is configured to adjust an optical power of the variable focus lens by moving the shaper ring relative to the refractive component along the axis, such that a curvature of the lens membrane in the aperture is modified.

An optical instrument including: an optical system which forms a target object image; a magnification changer which changes a magnification of the target object image; an eyecup member; and an eyecup driver which causes the eyecup member to move in association with alteration of the magnification of the target object image made by the magnification changer.