Electronic devices such as head-mounted electronic devices may include displays for presenting images to users. To accommodate variations in the interpupillary distances associated with different users, a head-mounted device may have left-eye and right-eye optical modules that move with respect to each other. To hide internal structures from view, the rear of a head-mounted device may be provided with a stretchable fabric cover with openings for receiving optical modules. The fabric cover may have first strands forming a warp knit layer with diamond-shaped openings and second strands that zig-zag back and forth within the diamond-shaped openings. The first strands may stretch in the warp direction, while the second strands may stretch in the weft direction. The second strands may have a fuzzy covering for hiding electrical components even as the diamond-shaped openings expand when the fabric is stretched.

An optical lens, comprising: a first part, comprising a first surface; and a second part, comprising a second surface, a third surface and at least one concave portion. The first surface and the second surface are not parallel with the third surface, the first part protrudes from the third surface, and the first surface and the second surface are connected with the third surface.

An optical lens, comprising: a first part, comprising a first surface; and a second part, comprising a second surface, a third surface and at least one concave portion. The first surface and the second surface are not parallel with the third surface, the first part protrudes from the third surface, and the first surface and the second surface are connected with the third surface.

This invention minimizes the needed space for a changer device for optical elements which can be mounted in front or in the back or on either fork side of telescopes. It implements a design whose profile is circular and centrosymmetric and gravitanionally neutral in respect to the path of light of the surrounding optical devices as well as an optimized mechanical depth. This is achieved by moving the centrosymmetrically arranged optical elements individually into the optical path i.e. the central opening of the changing device in contrary to prior art designs wherein the optical elements are mounted on a revolving disk whose axis of rotation is not congruent with the optical axis. The invention minimizes the obstructing area and shape of the changing device as well as the gravitational stress on surrounding structures by incorporating a design with minimal space requirements.

This invention minimizes the needed space for a changer device for optical elements which can be mounted in front or in the back or on either fork side of telescopes. It implements a design whose profile is circular and centrosymmetric and gravitanionally neutral in respect to the path of light of the surrounding optical devices as well as an optimized mechanical depth. This is achieved by moving the centrosymmetrically arranged optical elements individually into the optical path i.e. the central opening of the changing device in contrary to prior art designs wherein the optical elements are mounted on a revolving disk whose axis of rotation is not congruent with the optical axis. The invention minimizes the obstructing area and shape of the changing device as well as the gravitational stress on surrounding structures by incorporating a design with minimal space requirements.

A cooling device that enables the tip position of optical fiber to be adjusted and is able to efficiently cool an entirely of the optical fiber. This cooling device is provided with a cooling base plate, a fiber holder and an adjustment member. The cooling base plate has a recessed accommodating part. The fiber holder is disposed in the recessed accommodating part so as to be freely movable in a first direction. The adjustment member is disposed in a gap between the fiber holder and an end face of the recessed accommodating part and is movable in the first direction by moving in a second direction that intersects the first direction. The adjustment member abuts against both the end face of the recessed accommodating part and an end face of the fiber holder.

A cooling device that enables the tip position of optical fiber to be adjusted and is able to efficiently cool an entirely of the optical fiber. This cooling device is provided with a cooling base plate, a fiber holder and an adjustment member. The cooling base plate has a recessed accommodating part. The fiber holder is disposed in the recessed accommodating part so as to be freely movable in a first direction. The adjustment member is disposed in a gap between the fiber holder and an end face of the recessed accommodating part and is movable in the first direction by moving in a second direction that intersects the first direction. The adjustment member abuts against both the end face of the recessed accommodating part and an end face of the fiber holder.

Provided is a highly reliable imaging module that can easily carry out optical axis adjustments and focus adjustments while assuring required light shielding performance, and in which malfunctions do not easily occur in solder junctions and the like for imaging elements even under severe temperature environments. An imaging module has, in addition to a lens holding member (10), an imaging element (25), and a substrate (30) on which the imaging element (25) is mounted, a shielding member (40) that is for preventing extraneous light from entering the imaging surface of the imaging element (25) and on which a ring-shaped or notched ring-shaped protrusion (51) for shielding is provided. The shielding member (40) is held between the lens holding member (10) and the substrate (30) without the protrusion (51) for shielding coming into contact with another member.

Provided is a highly reliable imaging module that can easily carry out optical axis adjustments and focus adjustments while assuring required light shielding performance, and in which malfunctions do not easily occur in solder junctions and the like for imaging elements even under severe temperature environments. An imaging module has, in addition to a lens holding member (10), an imaging element (25), and a substrate (30) on which the imaging element (25) is mounted, a shielding member (40) that is for preventing extraneous light from entering the imaging surface of the imaging element (25) and on which a ring-shaped or notched ring-shaped protrusion (51) for shielding is provided. The shielding member (40) is held between the lens holding member (10) and the substrate (30) without the protrusion (51) for shielding coming into contact with another member.

A wearable electronic device can include a light seal to comfortably engage the face of the user and to exclude light from an external environment. The light seal can include one or more air bladders that conform as needed to the face of the user. One or more of the air bladders can include a valve that releases air from the air bladder when a pressure within the air bladder exceeds a threshold. Such release can cushion the user from an external force applied to the wearable electronic device. The air bladders can have different configurations, such that greater relief is provided to more sensitive regions of the user's face.