Abstract: In an inertial sensor, a first movable body configured to swing around a first rotation axisrotation axis along a first direction has an opening; the opening includes a second movable body configured to swing around a second rotation axisrotation axis along a second direction, a second support beam supporting the second movable body as the second rotation axisrotation axis, a third movable body configured to swing around a third rotation axisrotation axis along the second direction, and a third support beam supporting the third movable body as the third rotation axisrotation axis; and a protrusion is provided at a surface facing the second movable body and the third movable body, or at the second movable body and the third movable body, the protrusion protruding toward the second movable body and the third movable body or the surface.

Abstract: An inertial sensor includes a substrate, a first supporting beam being a first rotation axis extending along a first direction, a first movable member swingable around the first rotation axis, a second supporting beam being a second rotation axis extending along a second direction crossing the first direction, a second movable member swingable around the second rotation axis, a third rotation axis extending along a second direction, a third movable member swingable around the third rotation axis, and a projection, wherein the second and third movable members are line-symmetrically placed with a center line of the first movable member along the second direction as an axis of symmetry, a center of gravity of the second movable member is closer to the center line than the second supporting beam, and a center of gravity of the third movable member is closer to the center line than the third supporting beam.

Abstract: A putter head including a replaceable intermediate member that can be customized in size, shape, and performance according to user's preference is provided. A putter head according to an embodiment includes a front member having a shaft attachment portion and a front surface constituting a face surface, a rear member attached to a rear of the front member, and an intermediate member that is disposed between the front member and the rear member and is replaceable, and the intermediate member is selectable from a plurality of intermediate members formed in different sizes, shapes, or materials.

Abstract: In an inertial sensor, a first movable body configured to swing around a first rotation axisrotation axis along a first direction has an opening; the opening includes a second movable body configured to swing around a second rotation axisrotation axis along a second direction, a second support beam supporting the second movable body as the second rotation axisrotation axis, a third movable body configured to swing around a third rotation axisrotation axis along the second direction, and a third support beam supporting the third movable body as the third rotation axisrotation axis; and a protrusion is provided at a surface facing the second movable body and the third movable body, or at the second movable body and the third movable body, the protrusion protruding toward the second movable body and the third movable body or the surface.

Abstract: An inertial sensor includes a substrate, a first supporting beam being a first rotation axis extending along a first direction, a first movable member swingable around the first rotation axis, a second supporting beam being a second rotation axis extending along a second direction crossing the first direction, a second movable member swingable around the second rotation axis, a third rotation axis extending along a second direction, a third movable member swingable around the third rotation axis, and a projection, wherein the second and third movable members are line-symmetrically placed with a center line of the first movable member along the second direction as an axis of symmetry, a center of gravity of the second movable member is closer to the center line than the second supporting beam, and a center of gravity of the third movable member is closer to the center line than the third supporting beam.

Abstract: An optical filter includes a first substrate which has a support portion, a second substrate which is supported by the support portion, a first optical film which is provided on the first substrate, and a second optical film which is provided on the second substrate to face the first optical film. The first substrate and the second substrate are fixed to each other by bonding a first bonding film which is provided on the entire region of a support surface of the support portion supporting the second substrate and a second bonding film which is provided on at least a region (opposing surface) facing the entire region of the support surface from a supported surface of the second substrate.

Abstract: An optical filter includes: a lower substrate; a lower mirror provided to the lower substrate; a lower electrode provided to the lower substrate; an upper substrate disposed so as to be opposed to the lower electrode; an upper mirror provided to the upper substrate, and opposed to the lower mirror; and an upper electrode provided to the upper substrate, and opposed to the lower electrode, wherein the upper substrate has a groove surrounding the upper mirror in a plan view, the groove includes a first side surface section, a second side surface section, a bottom surface section, a first end section located between the first side surface section and the bottom surface section, and a second end section located between the second side surface section and the bottom surface section, in a cross-sectional view, and the first end section and the second end section each have a curved surface.

Abstract: A functional device according to an embodiment of the invention includes: an insulating substrate; a movable section; movable electrode fingers provided in the movable section; and fixed electrode fingers provided on the insulating substrate and arranged to be opposed to the movable electrode fingers. The fixed electrode fingers include: first fixed electrode fingers arranged on one side of the movable electrode fingers; and second fixed electrode fingers arranged on the other side of the movable electrode fingers. The first fixed electrode fingers and the second fixed electrode fingers are arranged to be spaced apart from each other.

Abstract: An etalon includes a fixed mirror disposed on a first substrate, a movable mirror disposed on a second substrate to face the fixed mirror with a gap interposed therebetween, a first electrode disposed on the surface of the first substrate facing the second substrate, a second electrode disposed on a first surface of the second substrate facing the first substrate and separated from the first electrode, and a warp preventing film disposed on a second surface of the second substrate so as to cover at least the movable mirror in a plan view. The direction of an internal stress acting in the in-plane direction of the warp preventing film is parallel to the direction of an internal stress acting in the in-plane direction of the movable mirror and the second electrode.

Abstract: An optical filter includes: a lower substrate; a lower mirror provided to the lower substrate; a lower electrode provided to the lower substrate; an upper substrate disposed so as to be opposed to the lower electrode; an upper mirror provided to the upper substrate, and opposed to the lower mirror; and an upper electrode provided to the upper substrate, and opposed to the lower electrode, wherein the upper substrate has a groove surrounding the upper mirror in a plan view, the groove includes a first side surface section, a second side surface section, a bottom surface section, a first end section located between the first side surface section and the bottom surface section, and a second end section located between the second side surface section and the bottom surface section, in a cross-sectional view, and the first end section and the second end section each have a curved surface.

Abstract: A functional device according to an embodiment of the invention includes: an insulating substrate; a movable section; movable electrode fingers provided in the movable section; and fixed electrode fingers provided on the insulating substrate and arranged to be opposed to the movable electrode fingers. The fixed electrode fingers include: first fixed electrode fingers arranged on one side of the movable electrode fingers; and second fixed electrode fingers arranged on the other side of the movable electrode fingers. The first fixed electrode fingers and the second fixed electrode fingers are arranged to be spaced apart from each other.

Abstract: A functional device according to an embodiment of the invention includes: an insulating substrate; a movable section; movable electrode fingers provided in the movable section; and fixed electrode fingers provided on the insulating substrate and arranged to be opposed to the movable electrode fingers. The fixed electrode fingers include: first fixed electrode fingers arranged on one side of the movable electrode fingers; and second fixed electrode fingers arranged on the other side of the movable electrode fingers. The first fixed electrode fingers and the second fixed electrode fingers are arranged to be spaced apart from each other.

Abstract: A functional element including a substrate having a principal surface, a groove portion (a first groove portion, a second groove portion) disposed on the principal surface, and a fixed electrode section (a first fixed electrode finger, a second fixed electrode finger) laid across the groove portion on the substrate, wherein, in the groove portion, a raised portion formed by using at least one of the substrate and the fixed electrode section is provided in a position overlapping with the fixed electrode section in a plan view, the raised portion has a bonded surface (an end face), a wiring line (a first wiring line, a second wiring line) is disposed on the bonded surface, and the substrate and the fixed electrode section are connected with the wiring line sandwiched between the substrate and the fixed electrode section.

Abstract: A wavelength variable interference filter includes: a first substrate which has a light transmissive property; a second substrate which has a light transmissive property and is disposed to face one surface of the first substrate and is bonded thereto; a first reflection film which is provided on the first substrate; a second reflection film which is provided on the second substrate; and a variable section which varies the gap; wherein the second substrate includes: a first layer which has a movable section; and a second layer which is laminated to a surface of the first layer facing the first substrate, is formed in a plate shape with a uniform thickness, and has a support section configured to displaceably support the movable section; and the first layer is not laminated to at least a region overlapping with the support section in the planar view.

Abstract: An etalon includes a first substrate and a second substrate. The first substrate has a first protrusion that does not face the second substrate, and a first electrode pad is formed on the first protrusion, whereby connection reliability can be improved.

Abstract: A method of manufacturing an optical filter according to the invention includes the steps of forming a first bonding film in a first bonding area of a first substrate provided with a first reflecting film, forming a second bonding film in a second bonding area of a second substrate provided with a second reflecting film, irradiating the first bonding area with ozone or an ultraviolet ray using a first mask member, irradiating the second bonding area with ozone or an ultraviolet ray using a second mask member, and bonding the first bonding film and the second bonding film to each other to bond the first substrate and the second substrate to each other, thereby protecting the reflecting films from ozone or ultraviolet radiation to prevent the reflecting films from being deteriorated in the manufacturing process.

Abstract: An optical filter according to the invention includes: first and second substrates opposed to each other; first and second reflecting films provided to the first and second substrates; first and second bonding films provided to the first and second substrates; and first and second barrier films disposed on surfaces of the first and second reflecting films, wherein the first barrier film has a transmittance of ozone lower than a transmittance of ozone the first reflecting film has, and the second barrier film has a transmittance of ozone lower than a transmittance of ozone the second reflecting film has. Accordingly, the reflecting films are protected from ozone or ultraviolet radiation during the manufacturing process of the optical filter and thereby the optical filter characteristics is prevented from being deteriorated.

Abstract: In a tunable interference filter according to the invention, a second substrate includes a light transmission hole and alight transmissive member provided within the light transmission hole, and the light transmission hole is formed in a tapered shape having a diameter dimension of an inner circumferential surface increasing from the first surface toward the second surface, and the light transmissive member has a light incident surface in parallel to the first reflection surface and the second reflection surface, a light exiting surface in parallel to the first reflection surface and the second reflection surface, and a tapered side surface having a diameter dimension increasing from the first surface toward the second surface, and the tapered side surface is in contact with the inner circumferential surface of the light transmission hole.