Kamakura Koki Co., Ltd.

Kazuya Miyaji

Kunio Ando

Haruo Itoh

Masashi Kato

Naomi Watanabe

Haruo Ito

An anti-vibration optical device includes an objective lens group provided on one side of a housing, an eyepiece group provided on another side of the housing, an image blur corrector housed into the housing to be located between the objective lens group and the eyepiece group and including an erecting prism, a gimbal mechanism rotatably supporting the erecting prism and an actuator for rotating the erecting prism via the gimbal mechanism, a first angular velocity detection sensor configured to detect a first angular velocity, which is an angular velocity of the housing, a second angular velocity detection sensor configured to detect a second angular velocity, which is an angular velocity of the erecting prism, and a controller configured to control the actuator on the basis of the first angular velocity and the second angular velocity.

Anti-vibration optical device

An optical observation device for observing a target located at a distant observation sight that comprises an observation telescope and an infrared sighting device. The infrared sighting device eventually provides a visual target image as a sighting marker from a thermal infrared image of the observation sight. The sighting marker and the observation sight are simultaneously viewed in the field of view of the observation telescope so as to enable training of the observation telescope on a part of the observation sight where the target is located.

Optical observation device

An image stabilizing device and system for a binocular telescope having a pair of telescopic optical systems each comprising an objective lens, a gimbal mounted erecting prism and an eyepiece lens which is capable of compensating for deterioration in quality of an observed image due to user hand shake or other external vibrations.

Image stabilizing device and system for telescopic optical instruments

An optical image stabilizer for a telescopic instrument having an objective lens, an erect prism, and an eyepiece lens arranged in this order which is capable of compensating for image deteriorations of an observed image due to external vibrations. The optical image stabilizer has a gimbal device mounted on a telescope housing, an external gimbal frame rotatably mounted on the gimbal casing, and an internal gimbal frame with the erect prism fixed thereto. Voice coil motors are provided for rotating the external and the internal gimbal frames. One of the voice coil motors has a coil disposed on the circuit board and a permanent magnet disposed on either one of the external and the internal gimbal frames oppositely to the coil. The remaining voice coil motor has a coil disposed on the circuit board and a permanent magnet disposed on the other gimbal frame oppositely to the coil.

Optical image stabilizer

The invention relates to improving optical properties of optical instruments with variable magnification, such as zoom binoculars, reducing the weight thereof, and enabling the user to change magnifications quickly. The invention provides an optical instrument with a focal length-varying lensdisposed on the optical axis between an objective lensand an eyepiece, further having an adjusting lensfor adjusting optical properties when the focal length-varying lens is in an area to provide high magnification. The adjusting lens is supported so that it is capable of moving between a location on the optical axis and a location off the path of light beams. Interlocked with a magnification-varying mechanism that controls the position of the focal length-varying lens, the adjusting lens is moved to the on-the-axis location when the focal length-varying lens is in an area to provide high magnification, and to the off-the-axis location when low magnification.

Magnification-varying optical device

A focusing mechanism allowing a user to adjust the focus from infinity to a close distance rapidly and precisely, and an optical device utilizing such a focusing mechanism. The focusing unit includes an optical member movable along an optical axis of an optical system, a screw body put into rotation via the rotation of an operation member, a nut body meshing with the screw body and including a cam follower, a cam follower restricting means including a rotation restricting portion for restricting the cam follower from rotating or revolving about a rotation or revolution axis of the operation member, and a rotation restriction releasing portion for releasing the restriction which prevents the rotation or revolution of the cam follower about the rotation or revolution axis of the operation member, and an optical member moving means for moving the optical member along the optical axis via the movement of the nut body along its rotation axis.

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Saitama, Japan

Kazuya Miyaji