Abstract: An imaging lens module includes an imaging lens assembly and a first optical component. The imaging lens assembly has an optical axis and includes a lens element. The lens element includes an effective optical portion, which is non-circular and disposed on a center of the lens element. The first optical component has a non-circular opening hole. The effective optical portion of the lens element of the imaging lens assembly is corresponded to the non-circular opening hole of the first optical component.

Abstract: A compact high-resolution imaging lens which provides a wide field of view of 80 degrees or more and corrects various aberrations properly. Designed for a solid-state image sensor, the imaging lens includes constituent lenses arranged in the following order from an object side to an image side: a first positive (refractive power) lens having a convex object-side surface; a second negative lens having a concave image-side surface; a third positive lens as a double-sided aspheric lens having a convex object-side surface; a fourth positive lens having a convex image-side surface; a fifth lens as a double-sided aspheric lens having a concave image-side surface; and a sixth negative lens having a concave image-side surface. The image-side surface of the sixth lens has an aspheric shape with a pole-change point in a position off an optical axis.

Abstract: Provided are an optical lens assembly and an electronic apparatus including the same according to various embodiments. The optical lens assembly includes: a first lens group having a positive refractive power; a second lens group having a positive refractive power; and a bending unit located between the first lens group and the second lens group and configured to bend an optical path, wherein the first lens group, the second lens group, and the bending unit are sequentially arranged from an object side to an image side, and the optical lens assembly has a maximum viewing angle of 130° or more. Other embodiments may be implemented.

Abstract: An optical system for panoramic stereoscopic imaging can include an outer reflector and an inner reflector, which can both be configured to reflect light to a camera. The outer reflector can include striations or other reflection elements to turn the light that is reflected to the camera such that first and second light rays that are parallel and offset from each other (e.g., suitable for stereoscopic 3D viewing) can be reflected by the respective outer and inner reflectors to the camera. The outer reflector can be partially reflective and partially transmissive so that some light can pass through the outer reflector to be reflected by the inner reflector to the camera. The camera can capture a single image having a first portion that corresponds to a view generated by the inner reflector, and a second portion that corresponds to a stereoscopically offset view generated by the outer reflector.

Abstract: A zoom lens includes, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a middle lens group including at least one lens unit, a negative N minus second lens unit, a negative N minus first lens unit, and a positive Nth lens unit, where N is an integer of six or more, in which distances between the adjacent lens units change during zooming, the first lens unit moves toward the object side during zooming from a wide-angle end to a telephoto end, the N minus second lens unit moves during focusing, and a total lens length at the wide-angle end, a backfocus at the wide-angle end, and a lateral magnification of a combined system of the N minus first lens unit and the Nth lens unit at the wide-angle end are set appropriately.

Abstract: A head-mounted display may include a display system and an optical system in a housing. The display system may have a pixel array that produces light associated with images. The display system may also have a linear polarizer through which light from the pixel array passes and a quarter wave plate through which the light passes after passing through the quarter wave plate. The optical system may be a catadioptric optical system having one or more lens elements. The lens elements may include a plano-convex lens and a plano-concave lens. A partially reflective mirror may be formed on a convex surface of the plano-convex lens. A reflective polarizer may be formed on the planar surface of the plano-convex lens or the concave surface of the plano-concave lens. An additional quarter wave plate may be located between the reflective polarizer and the partially reflective mirror.

Abstract: A device for detecting light includes a silicon photomultiplier (SiPM) comprising a detection area formed from an array of a plurality of single-photon avalanche diodes (SPADs). An optical system is configured to shape the light such that the detection area is covered as completely as possible with a light beam region of substantially constant intensity.

Abstract: Provided is a microscope system including: a galvanometer scanner that scans laser light on a sample; an observation optical system that acquires an image of the sample on which the laser light is scanned by the galvanometer scanner; an ROI setting portion that sets a region-of-note, which is an area of note in the sample, so as to serve as an observation ROI in the image acquired by the observation optical system; an amount-of-rotation calculating portion that calculates an amount by which the observation ROI is rotated about the Z-axis in the image in association with rotation of the region-of-note about the Z-axis; and a control portion that controls the galvanometer scanner so that the direction in which the laser light is scanned in the region-of-note is made steady on the basis of the amount by which the observation ROI is rotated about the Z-axis.

Abstract: A confocal inspection system can optically characterize a sample. An objective lens, or separate incident and return lenses, can deliver incident light from a light source to the sample, and can collect light from the sample. Confocal optics can direct the collected light onto a detector. The system can average the incident light over multiple locations at the sample, for example, by scanning the incident light with a pivotable mirror in the incident and return optical paths, or by illuminating and collecting with multiple spaced-apart confocal apertures. The system can average the collected light, for example, by directing the collected light onto a single-pixel detector, or by directing the collected light onto a multi-pixel detector and averaging the pixel output signals to form a single electronic signal. Averaging the incident and/or return light can be advantageous for structured or inhomogeneous samples.

Abstract: The invention relates to a system for spherically correcting imaging of a three-dimensional object, comprising a microscope comprising an immersion medium and an embedding medium for holding the three-dimensional object separated from the immersion medium of the microscope by a boundary surface or a cover slip. According to the invention, the thickness (?s) of the immersion medium and the position (?s?) of the primary intermediate image of the three-dimensional object can be variably modified.

Abstract: A detector device is designed to capture light and to generate electrical signals. The detector device includes a housing and a detector disposed in the housing so as to be moveable at least partially in the housing and with respect to the housing. The detector device is useable in a detection system and/or in a microscope.

Abstract: The invention relates to a method for recording images with a light microscope, wherein a specimen container with a specimen is arranged on a specimen holder of the light microscope, and wherein illuminating light is guided onto the specimen. The illuminating light can hereby be cut in a cross-section transversely to an optical axis of the light microscope through a wall of the specimen container to a limited cross-sectional region. First and second diaphragm settings are determined and set, for the limited cross-sectional region of the illuminating light defined by the wall of the specimen container, in which the diaphragm covers equal sized portions of the limited cross-sectional region. In addition the invention relates to a light microscope which is adapted in particular to carry out the method.

Abstract: Provided is a microscope system including: a plurality of objective lenses that are selectively used to collect fluorescence from a specimen; a detecting unit that obtains image information of the specimen on the basis of the fluorescence collected by the objective lens; and an adjustment unit that adjusts the observation range of the specimen S and that divides the observation range into one or more observation regions corresponding to a capture range captured by the detecting unit, wherein the adjustment unit calculates an observation magnification at which the entire well is included in the observation range, the number of observation regions is minimized, and the resolution becomes the highest, on the basis of information about the size of the well in a multi-plate for accommodating the specimen and information about an objective magnification of the objective lens, and adjusts the observation range on the basis of the calculated observation magnification.

Abstract: A method and system for extracting the zoom level of a microscope is disclosed. The method includes capturing a reference image; recording a first zoom level corresponding to a first magnification at which the reference image is captured; capturing a second image; determining a second zoom level by comparing the second image and the reference image, the second zoom level corresponding to a second magnification at which the second image is captured; and recording the second zoom level at a location accessible by a microscope application.

Abstract: Apparatus and methods are disclosed to share images observed through an optical device and display data through the optical device. An input/output device may be positioned in an optical path of the optical device. The input/output device may include a beam splitter to redirect a portion of a beam of light traveling along the optical path of the optical device to an imaging device. The beam splitter may also combine the beam of light with another beam of light generated by a display device.

Abstract: Provided are an optical unit and an endoscope that can enhance the airtightness between a holding tube and a cover glass without a joining member flowing into a distal end surface of an optical lens while maintaining the attachment accuracy of the cover glass. A spacer is disposed between a cover glass position restricting part of a holding tube of an optical unit and a cover glass. The position of the cover glass in an optical axis is restricted by the cover glass position restricting part via a spacer. An external diameter of a first end surface of the spacer is smaller than an internal diameter of a cover glass fixing part of the holding tube. A solder pool part is provided in a region, which is surrounded by a side surface of the spacer, the cover glass fixing part, and the cover glass position restricting part.

Abstract: An optical device includes: an excitation light source; a first light transmitter that transmits excitation light emitted from the excitation light source; a fluorescent light part that is disposed on a surface of the first light transmitter opposite a surface through which the excitation light enters, and emits fluorescent light from the excitation light; a second light transmitter that interposes the fluorescent light part with the first light transmitter, and transmits light emitted from the fluorescent light part; a light transmission fiber that guides the light exiting from the second light transmitter; and a microfabricated film that is disposed on a side of the second light transmitter closer to the light transmission fiber, and collects, toward the light transmission fiber, the light emitted from the fluorescent light part.

Abstract: Apparatuses and methods for an interposer for integration of multiple image sensors are disclosed herein. An example apparatus includes an interposer including laterally spaced first and second windows, and first and second image sensors disposed on the interposer over the first and second windows, respectively. The interposer including conductive conduits formed in or on to provide electrically conductive paths there through with the first and second image sensors coupled to the conductive conduits. The first and second image sensors laterally spaced by a gap, and an active area of the first and second image sensors to receive incident light through the respective first and second windows, where a perspective of the first image is different than a perspective of the second image sensor based at least in part on the gap.

Abstract: Provided are a compact eyepiece video display, and a head mounted display equipped with an eyepiece video display. In a display optical system (1), a polarization separation element (10) reflects first polarization light component while transmitting second polarization light component. A light source (20) emits light toward the polarization separation element (10). A reflection part (30) converts the first polarization light component included in the light output from the light source (20) and reflected from the polarization separation element (10) into the second polarization light component while reflecting the light output so that the light output enters the polarization separation element (10).

Abstract: The present invention relates to adjustable focus loupe eyeglasses comprising: side frames on both sides thereof; a front frame with a glasses frame structure; and a loupe mounting unit for mounting a loupe, the loupe mounting unit being installed so as to be slidable right and left along the front frame, wherein the front frame is configured such that a portion between both ends thereof in the longitudinal direction of the plane surface forms a circular arc shape around a preset front focal point, and has a guide hole which is formed vertically through the upper portion thereof and has a length along the circular arc shape, and wherein the loupe mounting unit comprises: a locking part which is fixed to or is slidable along the guide hole; and a rim which is arranged on the bottom of the locking part and on which a loupe is mounted, wherein the loupe mounted on the rim is configured such that a focal spot magnified by the loupe mounting unit being guided along the guide hole faces toward the center of the cir

Abstract: Loupes with magnetically interchangeable telescopes. Each loupe may include an anchor assembly and a telescope assembly. Either assembly may include a magnet. The other assembly may include a magnetic element. The telescope assembly may be releasably adjoined to the anchor assembly by magnetic attraction. The magnetic attraction may include magnetic interaction between the magnet and the magnetic element. Geometrical shape and magnetic properties of each of the magnet and the magnetic element, and placement of each within its assembly, may be set for maintaining releasable adjoinment of the assemblies. The loupe may provide a magnified view of a visual field, such as a clinical setting. The telescope assembly may be interchangeable in the loupe for another telescope assembly. The interchangeable telescope assemblies may provide different magnifications of the field. Loupes may be paired for binocular magnified viewing of the field.

Abstract: An optical magnifying combination lens, head-mounted display optical system and virtual reality display device. The optical magnifying combination lens (2) is used in a head-mounted virtual reality display device and includes a main lens (21) and a secondary lens (22), the main lens (21) including a central area (A) and an peripheral area (B), wherein the central area (A) comprises a convex lens or a combined convex lens, and the peripheral area (B) is a focusing thin optical element. The secondary lens (22) is a focusing thin optical element formed with a hollowed-out region. The main lens (21) and the secondary lens (22) are stacked together, and the hollowed-out region of the secondary lens (22) closely fits with a convex portion of the central area (A) of the main lens (21). The display device using the optical magnifying combination lens (2) ensures central image quality, and expands a peripheral field of view of a human eye, thus increasing user immersion.

Abstract: An optical magnifying combination lens, a head-mounted optical display system and a virtual reality display device are provided, wherein the optical magnifying combination lens is for utilization in a head-mounted virtual reality display device, comprising: a central area (A) and a peripheral area (B), wherein the central area (A) is a convex lens or a combination convex lens, and the peripheral area (B) is a focusing thin optical element; the central area (A) corresponds to main visual field imaging, and the peripheral area (B) corresponds to peripheral visual field imaging. The optical magnifying combination lens guarantees center image quality and enlarges edge view of human eyes, so as to enhance user immersion feelings.

Abstract: A configurable optical device may include an optical transducer, a multi-lens arrangement, and a controllable optical modulator. The optical transducer is configured to convert light to electrical signals or to convert electrical signals to light. The multi-lens arrangement is positioned to redirect at least some of the light to or from the optical transducer. The controllable optical modulator is provided between the multi-lens arrangement and the optical transducer. The controllable optical modulator is coupled to receive and spatially modulate light to or from the optical transducer. The optical modulator is selectively controllable to steer and/or shape the light to a selected distribution of light from the multi-lens arrangement onto the optical transducer and/or from the optical transducer onto the multi-lens arrangement.

Abstract: A display panel includes a first substrate and a second substrate which are arranged opposed to each other. The space between the first substrate and the second substrate is separated into a plurality of sub-pixel regions. Within each sub pixel region, a first electrode, a first fluid layer, a second fluid layer, a hydrophobic dielectric layer and a second electrode are arranged in this order. The first fluid layer is made of hydrophilic liquid. The second fluid layer is made of ink. When no electric field is applied between the first electrode and the second electrode, the ink spreads over the surface of the hydrophobic dielectric layer. When an electric field is applied between the first electrode and the second electrode, the ink aggregates to expose the hydrophobic dielectric layer.

Abstract: In order to project an image excluding zero-order light without adding extra modulation elements or pixels, without applying distortions, and without reducing luminance, a projection device includes: a phase modulator that modulates the phase of incident laser light; a Fourier transform lens that performs Fourier transformation on laser light, whose phase is modulated by the phase modulator; a mirror disposed on an image formation surface by the Fourier transform lens, and configured to reflect the laser light subjected to Fourier transformation by the Fourier transform lens; and a projection lens that enlarges the light reflected by the mirror and projects the light as projected light. The mirror guides zero-order light included in the Fourier-transformed laser light in a direction different from a direction of the projection lens, and reflects the light excluding zero-order light toward the projection lens.

Abstract: An illustrative example device for steering radiation includes an optic component including a plurality of concave surfaces on at least one side of the optic component, a plurality of radiation sources respectively aligned with the plurality of concave surfaces, and at least one actuator that selectively moves the optic component relative to the plurality of light sources to selectively change a direction of respective beams of radiation passing through the plurality of concave surfaces.

Abstract: A reflector has a reflective surface on first and second directions. Each of torsion beams extends to each opposite side of the reflective surface in the first direction. Each of coupling portions is to each opposite side of the reflector in the first direction and includes a central portion with U-shape having two projection portions and a bottom portion joined to the torsion beam. The projection portions include first concave portions opposing across the torsion beam by being penetrated in thickness direction. Each first concave portion extends in the second direction from an opening to a side surface facing the torsion beam towards an opposite side surface up to a bottom. A distance between the bottoms of the first concave portions across the torsion beam is greater than a distance between the side surfaces each facing the torsion beam of the projection portions.

Abstract: A mems scanner package and a scanning projector including the same are disclosed. The MEMS scanner package includes a MEMS scanner including a mirror surface for reflecting light, a magnet disposed behind the MEMS scanner, a lower case having an accommodation space formed therein to accommodate the magnet, an upper case having an opening formed therein to pass light, reflected from the MEMS scanner, therethrough, and a transparent cover unit for covering the opening. The transparent cover unit is embodied as a transparent member, and is coupled to the upper case while being inclined at a predetermined inclination angle with respect to the MEMS scanner.

Abstract: Embodiments for facilitating communication between users sharing a visual cue. A gaze location of a first user is determined as an approximation in three dimensional space. The gaze location is transmitted to a second user. A gaze focus of the first user based on the determined gaze location is displayed to the second user.

Abstract: A head-up display projects an image on a windshield to allow a viewer to visually observe a virtual image. The head-up display includes a display device, a relay optical system, and a projection optical system. The display device displays an image. The relay optical system provides the image displayed by the display device as an intermediate image. The projection optical system reflects the intermediate image provided by the relay optical system to project the intermediate image on the windshield.

Abstract: A split exit pupil heads-up display (HUD) system and method. The HUD system architecture makes use of a split exit pupil design method that enables a modular HUD system and allows the HUD system viewing eye-box size to be tailored while reducing the overall volumetric aspects. A single HUD module utilizes a micro-pixel imager to generate a HUD virtual image with a given viewing eye-box size. When integrated together into a single HUD system, a multiplicity of such a HUD modules displaying the same image enables an integrated HUD system to have an eye-box size that equals the same multiple of the eye-box size of a single HUD module. The brightness of the integrated HUD system is maintained while the eye-box size becomes multiple size of the eye-box of a single module. The integrated HUD system can be comprised of multiplicity of single HUD modules to scale the eye-box size to match the intended application while maintaining system brightness.

Abstract: Method and devices for creating a sedentary virtual-reality system are provided. A user interface is provided that allows for the intuitive navigation of the sedentary virtual-reality system based on the position of the users head. The sedentary virtual-reality system can render a desktop computing environment. The user can switch the virtual-reality system into an augmented reality viewing mode or a real-world viewing mode that allow the user to control and manipulate the rendered sedentary environment. The modes can also change to allow the user greater situational awareness and a longer duration of use.

Abstract: A head up display arrangement for a motor vehicle includes an image source emitting a light field. A first freeform mirror is positioned to provide a first reflection of the light field. A generally concave second freeform mirror is positioned to receive the first reflection and provide a second reflection of the light field. The second reflection is reflected off of a windshield of the vehicle so as to be visible to a driver of the vehicle. An arcuate section of a surface of the generally concave second freeform mirror receives the first reflection and provides the second reflection. An angle between the first freeform mirror and an imaginary line that is tangent to a midpoint of the arcuate section of the surface of the generally concave second freeform mirror is approximately between thirty degrees and sixty degrees.

Abstract: A display element includes a projection screen for a head-up display and a pivot apparatus for adjusting an inclination of the projection screen about a horizontal inclination axis. The pivot apparatus includes an eccentric unit for adjusting the inclination. The eccentric unit is mechanically coupled directly to the projection screen. The eccentric unit includes a first gearwheel and an eccentric element which is formed eccentrically with respect to the first gearwheel and is fastened on the first gearwheel. The eccentric element is in the form of a disk and an area of a narrow side of the disk-shaped eccentric element is arranged eccentrically with respect to the first gearwheel.

Abstract: There is disclosed an optical device, including a light-transmitting substrate having an input aperture, an output aperture, at least two major surfaces and edges, an optical element for coupling light waves into the substrate by total internal reflection, at least one partially reflecting surface located between the two major surfaces of the light-transmitting substrate for partially reflect ing light waves out of the substrate, a first transparent plate, having at least two major surfaces, one of the major surfaces of the transparent plate being optically attached to a major surface of the light-transmitting substrate defining an interface plane, and a beam-splitting coating applied at the interface plane between the substrate and the transparent plate, wherein light waves coupled in side the light-transmitting substrate are partially reflected from the interface plane and partially pass therethrough.

Abstract: A fixed-distance display system includes a light source configured to generate a light beam. The system also includes a light guiding optical element configured to propagate at least a portion of the light beam by total internal reflection. The system further includes a first inertial measurement unit configured to measure a first value for calculating a head pose of a user. Moreover, the system includes a camera configured to capture an image for machine vision optical flow analysis. The display system is configured to display virtual images only within a tolerance range of a single predetermined optical plane.

Abstract: A system for displaying virtual content to a user includes at least one light source to multiplex a plurality of light beams to display a respective plurality of light patterns associated with one or more frames of image data. The system also includes a plurality of waveguides to receive the plurality of light beams and to direct the plurality of light beams toward an exit pupil, wherein the plurality of waveguides are stacked along an optical axis of the user. The system further includes at least one optical element to modify a focus of a light beam of the plurality of light beams directed by the plurality of waveguides.

Abstract: Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition of matter, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to, via light from a light source, rendering an image on a retina.

Abstract: The present disclosure relates to a head-mounted electronic device. The head-mounted electronic device includes: a U-shaped head-mounted headphone; a U-shaped display component rotatably connected to the headphone; a sensor component disposed to the headphone and configured to sense a wearing state of the headphone; and a control means electrically connected to the sensor component and configured to control the display component and/or the headphone to make a correlative response when the sensor component senses that the headphone is switched between the wearing state and a non-wearing state.

Abstract: Disclosed is an optical apparatus including a display unit, a lens configured to pass an image formed by and transmitted from the display unit, a base configured to accommodate the lens therein, and an adjustment unit configured to move the lens relative to the base so as to adjust a path of light passing through the lens.

Abstract: In various embodiments, wavelength beam combining systems feature multiple beam emitters each emitting an individual beam, as well as multiple micro-optics arrangements each disposed optically downstream from a beam emitter to intercept the beam emitted thereby and direct the beam toward a dispersive element for combination into a multi-wavelength output beam.

Abstract: Provided is a decorative sheet capable of obtaining an equivalent or higher quality texture than that of a real carbon fiber sheet. The decorative sheet (10) includes a lenticular lens sheet (11) and an image forming layer (13). The lenticular lens sheet includes a plurality of cylindrical lenses (15). The image forming layer includes a first sub-divided region (Si), a second sub-divided region (S2), and an intermediate region (SM) in a unit region corresponding to each of the cylindrical lenses. By changing an observation direction of the decorative sheet, a first-design (P1), a gradation-design (PG), and a second-design (P2) are sequentially observed. The first-design and the second-design have mutually inverted densities. Images of the first-design, the second-design, and the gradation-design are formed in the first sub-divided region, the second sub-divided region, and the intermediate region, respectively, in a state where they are sub-divided in a belt shape.

Abstract: An image display system is provided. The image display system includes a display device; a reflecting unit; a first polarizer disposed between the display device and the reflecting unit; and a second polarizer, wherein the reflecting unit is located between the first polarizer and the second polarizer; wherein a first angle from an absorption axis of the first polarizer to an absorption axis of the second polarizer in counterclockwise direction is between 0±10 degrees.

Abstract: An apparatus including a light source configured to output unpixelated light; an array of reflective pixel control elements configured to selectively reflect incident unpixelated light to produce first pixelated light defining first display content; a pixelated display configured to produce second pixelated light defining second display content; and an optical arrangement configured to direct unpixelated light from the light source to the array of reflective pixel control elements and to combine the pixelated light defining the first display content and the second pixelated light defining the second display content to provide, as an output, third pixelated light defining third display content.

Abstract: A laser beam (L50) generated by a laser light source (50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device (60) bends the laser beam (L50) at the scanning origin (3) and irradiates the laser beam onto the hologram recording medium (45). At this time, scanning is carried out by changing a bending mode of the laser beam with time so that an irradiation position of the bent laser beam (L60) on the hologram recording medium (45) changes with time. Regardless of an irradiation position of the beam, diffracted light (L45) from the hologram recording medium (45) produces a reproduction image (35) of the scatter is plate on the spatial light modulator (200).

Abstract: Head wear type automatic flip glasses include a housing, front automatic flipping lenses, rear fixing lenses, a transmission system, a circuit control system and a head fixing member. The front automatic flipping lenses are connected with the housing in a flipping way; the rear fixing lenses are in fixed connection with the housing. The front automatic flipping lenses are disposed in front of the rear fixing lenses. The transmission system and the circuit control system are configured in the housing. The head fixing member is located on the housing. The circuit control system controls the driving of the transmission system which is used for controlling the flipping of the front automatic flipping lenses. The head wear type automatic flip glasses are worn on the head to perform trainings. The front automatic flipping lenses flip automatically, so there is no need for hand-holding or manual flipping. That contributes to the integration of the flip training with reading and writing.

Abstract: A system for mounting an eyewear lens on a user. The system includes a pair of nasal appliques, a bridge member, and a pair of lateral compression elements, with the bridge member and compression elements being attachable to an eyewear lens. The bridge member is magnetically engageable to the nasal appliques to limit translatable movement of the lens relative to the user, while the compression elements compress against opposed sides of the users head to mitigate pivotal movement of the lens relative to the user.

Abstract: The eyeglasses frame includes a first hinge barrel provided on a lens holding portion, a second hinge barrel provided on a temple, a first screw that pivotably couples the first hinge barrel and the second hinge barrel, and a second screw provided in the second hinge barrel and contactable with the first hinge barrel. A tip portion of the first hinge barrel is a cam that includes a first depression where the second screw comes to rest when the eyeglasses frame is completely open, a second depression where the second screw comes to rest when the eyeglasses frame is completely closed, substantially straight portions that join the first and second depressions, and a corner portion where the substantially straight portions change direction at a point therebetween.

Abstract: An accommodation assisting lens comprises a lens main body, and dots that are isotropically and uniformly disposed in the lens main body, and in a visible light region, a difference in average transmittance between a dot portion based on the dots, and a non-dot portion other than the dot portion is 2% to 50% inclusive.