Abstract: A method is provided for adjusting a loupe including an eyepiece and a tube framework having a first optical system adjacent to an object and a second optical system adjacent to the eyepiece. At least two zoom lenses in the first optical system shift along an optical axis between a first and a second position to change magnification. The method includes shifting at least one lens in the first optical system such that a distance at which the object is focused when the zoom lenses are shifted to the first position is substantially equal to a distance at which the object is focused when the zoom lenses are shifted to the second position; and then shifting at least one lens in the second optical system along the optical axis such that the object is focused when the zoom lenses are shifted to the first position or the second position.

Abstract: A loupe is bonded to a glasses-type holder to be worn around a head of a user. The loupe includes: a tube framework inserted into a hole or a cutout formed in the glasses-type holder and bonded with a UV adhesive; and a lens held in the tube framework. At least a portion at which the UV adhesive is applied in the tube framework is made of a resin not resistant to acetone and is covered with a paint resistant to acetone.

Abstract: A loupe is bonded to a glasses-type holder to be worn around a head of a user. The loupe includes: a tube framework inserted into a hole or a cutout formed in the glasses-type holder and bonded with a UV adhesive; and a lens held in the tube framework. At least a portion at which the UV adhesive is applied in the tube framework is made of a resin not resistant to acetone and is covered with a paint resistant to acetone.

Abstract: A method is provided for adjusting a loupe including an eyepiece and a tube framework having a first optical system adjacent to an object and a second optical system adjacent to the eyepiece. At least two zoom lenses in the first optical system shift along an optical axis between a first and a second position to change magnification. The method includes shifting at least one lens in the first optical system such that a distance at which the object is focused when the zoom lenses are shifted to the first position is substantially equal to a distance at which the object is focused when the zoom lenses are shifted to the second position; and then shifting at least one lens in the second optical system along the optical axis such that the object is focused when the zoom lenses are shifted to the first position or the second position.

Abstract: Lens barrel includes: a rotating barrel which holds a first optical system and includes an adjustment member that can protrude from an inner circumferential surface; and a fixed barrel which holds a second optical system and includes a helical groove with which the adjustment member engages on an outer circumferential surface. The adjustment member can be located in a first or a second position with respect to the helical groove. Part of the adjustment member is in the helical groove in any of the first position and the second position. When in the first position, the adjustment member can slide along the helical groove, so the rotating barrel helically rotates relative to the fixed barrel, and when in the second position, the adjustment member is in contact with the helical groove, to prevent rotation of the rotating barrel with respect to the fixed barrel.

Abstract: Lens barrel includes: a rotating barrel which holds a first optical system and includes an adjustment member that can protrude from an inner circumferential surface; and a fixed barrel which holds a second optical system and includes a helical groove with which the adjustment member engages on an outer circumferential surface. The adjustment member can be located in a first or a second position with respect to the helical groove. Part of the adjustment member is in the helical groove in any of the first position and the second position. When in the first position, the adjustment member can slide along the helical groove, so the rotating barrel helically rotates relative to the fixed barrel, and when in the second position, the adjustment member is in contact with the helical groove, to prevent rotation of the rotating barrel with respect to the fixed barrel.

Abstract: Described is an image capturing apparatus, which makes it possible to accurately secure the distance between the two lens groups, even if the interval distance between the two lens groups varies from the default design-distance value. The image capturing apparatus includes a first lens group, a second lens group, a first driving section to drive the first lens group, a second driving section to drive the second lens group, a first detecting section to detect a first reference position for moving the first lens group, and a second detecting section to detect a second reference position for moving the second lens group. A control section controls either the first driving section or the second driving section so as to move a corresponding one of the first lens group and the second lens group between the first detecting section and the second detecting section at a predetermined timing.

Abstract: The present invention provides a lens guide mechanism, a lens barrel, and an image pickup apparatus. A lens guide mechanism relating to the present invention includes: a plurality of lens frames each including a sliding section; and a guide shaft engaged with the sliding sections of the lens frames for slidably guiding the lens frames along an optical axis. The sliding section includes a contact portion in contact with the guide shaft. The sliding sections of neighboring lens frames are formed so as to overlap with each other at least when the neighboring lens frames come closer to each other.

Abstract: A lens barrel includes: an image pickup optical system including a plurality of lenses. The plurality of lenses includes an adjusting lens for a shift adjustment in a direction perpendicular to an optical axis of the image pickup optical system. The lens barrel further includes a lens frame holding the adjusting lens; and a housing holding the lens frame and including a wall portion. The lens frame comprises a plurality of protrusions coming contact with the wall portion and each of the plurality of protrusions has a protruding amount which differs from the other for correcting a tilt of an optical axis of the adjusting lens.

Abstract: A lens barrel including a first moving lens group for advancing light of a subject onto an image plane, a second moving lens group for advancing light of the subject onto the image plane, a shaft section for guiding the first moving lens group and the second moving lens group in a direction of an optical axis, an intermediate positioning section for supporting the shaft section at an intermediate portion of the shaft section, and an end positioning section for supporting one end of the shaft section, wherein the first moving lens group slides on a portion of the shaft section that is closer to the subject than the intermediate positioning section is, and wherein the second moving lens group slides on a portion of the shaft section that is closer to the image plane than the intermediate positioning section is.

Abstract: Described is an image capturing apparatus, which makes it possible to accurately secure the distance between the two lens groups, even if the interval distance between the two lens groups varies from the default design-distance value. The image capturing apparatus includes a first lens group, a second lens group, a first driving section to drive the first lens group, a second driving section to drive the second lens group, a first detecting section to detect a first reference position for moving the first lens group, and a second detecting section to detect a second reference position for moving the second lens group. A control section controls either the first driving section or the second driving section so as to move a corresponding one of the first lens group and the second lens group between the first detecting section and the second detecting section at a predetermined timing.

Abstract: A lens barrel includes: an image pickup optical system including a plurality of lenses. The plurality of lenses includes an adjusting lens for a shift adjustment in a direction perpendicular to an optical axis of the image pickup optical system. The lens barrel further includes a lens frame holding the adjusting lens; and a housing holding the lens frame and including a wall portion. The lens frame comprises a plurality of protrusions coming contact with the wall portion and each of the plurality of protrusions has a protruding amount which differs from the other for correcting a tilt of an optical axis of the adjusting lens.

Abstract: The present invention provides a lens guide mechanism, a lens barrel, and an image pickup apparatus. A lens guide mechanism relating to the present invention includes: a plurality of lens frames each including a sliding section; and a guide shaft engaged with the sliding sections of the lens frames for slidably guiding the lens frames along an optical axis. The sliding section includes a contact portion in contact with the guide shaft. The sliding sections of neighboring lens frames are formed so as to overlap with each other at least when the neighboring lens frames come closer to each other.

Abstract: A lens barrel including a first moving lens group for advancing light of a subject onto an image plane, a second moving lens group for advancing light of the subject onto the image plane, a shaft section for guiding the first moving lens group and the second moving lens group in a direction of an optical axis, an intermediate positioning section for supporting the shaft section at an intermediate portion of the shaft section, and an end positioning section for supporting one end of the shaft section, wherein the first moving lens group slides on a portion of the shaft section that is closer to the subject than the intermediate positioning section is, and wherein the second moving lens group slides on a portion of the shaft section that is closer to the image plane than the intermediate positioning section is.