Abstract: A contact lens and a contact lens assembly are provided. The contact lens includes a lens and a deformation unit. The lens configured to be worn in a human eye. The deformation unit is mounted to the lens and configured to deform according to a deformation voltage to make the lens deformed.

Abstract: A liquid lens of the present invention includes a first plate including a cavity in which a conductive liquid and a nonconductive liquid are disposed; a first electrode disposed on the first plate; a second electrode disposed under the first plate; a second plate disposed on the first electrode; and a third plate disposed under the second electrode, wherein the second plate includes a first region having a first thickness, the first region encompassing an optical axis, and a second region extended from the first region and having a second thickness greater than the first thickness, and the location of the upper surface of the first region is lower than the location of the upper surface of the second region.

Abstract: A lens apparatus includes a cam barrel having a cam groove and rotatable around an optical axis, a cam follower engaged with the cam groove, a movable member movable in an optical axis direction via the cam follower as the cam barrel rotates, a straight guide member configured to guide the movable member in the optical axis direction and restrict a movement of the cam barrel in a first direction parallel to the optical axis, a first biasing member configured to bias the movable member in a second direction opposite to the first direction so that the cam follower contacts a first cam groove surface of the cam groove in the optical axis direction, and a second biasing member configured to bias the cam barrel in the first direction.

Abstract: A base assembly of an exterior rear view device includes a base frame, and a base cover housing the base frame and formed in at least two parts connected to each other, where the base assembly includes a first opening at a first end of the base assembly at which the base frame is configured to be attached to a vehicle and a second opening at a second end of the base assembly at which a head assembly of the exterior rear view device is configured to be attached to the base frame.

Abstract: In some examples, a device includes a fluid lens having a substrate and a membrane connected to the substrate using a flexure. The fluid lens may include a fluid located within a cavity at least partially defined by the substrate and the membrane. The flexure may include a membrane attachment and an elastic element. The device may be configured so that a displacement of the membrane attachment adjusts a profile of the membrane, and may induce a compression of at least a portion of the elastic member. In some examples, a flexure may include a plurality of elastic elements, which may be attached to the substrate (e.g., through a flexure support), and a rigid element, that may include or be connected to the membrane attachment. Example devices include head-mounted devices, such as augmented reality or virtual reality devices.

Abstract: A grating structure for a diffractive optic includes grating lines, each of which is approximated by successive segments. Longitudinal axes of the segments each have an angle relative to a first coordinate axis of a reference coordinate system. A first section of a first one of the grating lines is approximated by a first group of the segments, and a second section adjacent to the first section of the first grating line is approximated by a second group of segments. The longitudinal axes of a major portion of the segments of the first group have a first predetermined angle relative to the first coordinate axis of the reference coordinate system, and the longitudinal axes of a major portion of the segments of the second group have a second predetermined angle different from the first predetermined angle relative to the first coordinate axis of the reference coordinate system.

Abstract: A disclosed medical observation system includes a capturing unit operable to capture an image of an observation target; and a light projection unit operable to project light on the observation target, outside a capturing area that is captured by the capturing unit and in a periphery of the capturing area, the light enabling recognition of a capturing state of the capturing unit.

Abstract: Operation of an electronic contact lens takes into account saccadic motion of the eye and reduced visual perception during saccades (saccadic suppression). The user's eye motion is tracked, and onset of a saccade is detected based on the eye's motion. For example, saccades may be detected when the eye's acceleration or jerk exceeds a threshold. The endpoint of the saccade is then predicted in real-time while the saccade is still occurring. This may be the temporal endpoint (i.e., when the saccade ends) and/or the positional endpoint (i.e., the eye position at the end of the saccade). Operation of the electronic contact lens is adjusted based on the predicted endpoint.

Abstract: The present disclosure provides a pair of glasses, including spectacle lenses and a sensing device, wherein the spectacle lens includes two layers of lenses which form a cavity, wherein the layer of lens on a wearing side of the spectacle lens is deformable, the cavity is filled with a first liquid and a second liquid, a volume of the first liquid is greater than that of the second liquid, and an electrowetting film is provided oppositely on a middle portion of an inner surface of at least one layer of lens, and wherein the sensing device is configured to measure a distance between the glasses and an object to be observed, wherein in the case where the measured distance is less than a preset spacing, the sensing device is turned on to apply a voltage to the electrowetting film.

Abstract: The present disclosure discloses an imaging lens assembly, along an optical axis from an object side to an imaging side including sequentially a first lens assembly and a second lens assembly. The first lens assembly has a positive refractive power and along the optical axis from the object side to the imaging side includes sequentially: a first lens, having a positive refractive power and its object-side surface is convex; a second lens, having a negative refractive power; and a third lens, having a positive refractive power or a negative refractive power. The second lens assembly has a negative refractive power and along the optical axis from the object side to the imaging side sequentially includes: a fourth lens, having a negative refractive power; and a fifth lens, having a positive refractive power or a negative refractive power and its object-side surface is convex at a paraxial position.

Abstract: Operation of an electronic contact lens takes into account saccadic motion of the eye and reduced visual perception during saccades (saccadic suppression). The user's eye motion is tracked, and onset of a saccade is detected based on the eye's motion. For example, saccades may be detected when the eye's acceleration or jerk exceeds a threshold. The endpoint of the saccade is then predicted in real-time while the saccade is still occurring. This may be the temporal endpoint (i.e., when the saccade ends) and/or the positional endpoint (i.e., the eye position at the end of the saccade). Operation of the electronic contact lens is adjusted based on the predicted endpoint.

Abstract: A variable magnification optical system comprising, in order from an object side, a first lens group having negative refractive power, a first intermediate lens group having positive refractive power, a second intermediate lens group having negative refractive power and a rear lens group; upon varying a magnification from a wide angle end state to a telephoto end state, a distance between the first lens group and the first intermediate lens group being varied, a distance between the first intermediate lens group and the second intermediate lens group being varied, and a distance between the second intermediate lens group and the rear lens group being varied; the rear lens group comprising at least one focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object; and predetermined conditional expressions being satisfied, thereby the focusing lens group(s) being reduced in weight.

Abstract: The present disclosure discloses an imaging lens assembly. The imaging lens assembly includes, sequentially from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens. An effective focal length f of the imaging lens assembly and an entrance pupil diameter EPD of the imaging lens assembly satisfy: f/EPD?1.8, and an incident angle of a chief ray corresponding to a maximal field-of-view incident on an object-side surface of the fourth lens CRA4<15°. The imaging lens assembly according to the present disclosure consists of 5 lenses, which can realize an imaging lens assembly having an ultra-thin large aperture and a good image quality.

Abstract: A light diffusion member constituting a head-up display device includes multiple micro-lenses and has a curved base surface. The edge angle is larger than the base surface angle change amount. The edge angle is an angle formed by one of tangent lines of two micro-lenses and the other of the tangent lines passing through a boundary between two adjacent micro-lenses on a cross section orthogonal to the base surface. A reference line has a constant direction on the cross section, and a normal line passes at an arbitrary position on the base surface. The maximum value is ?max and the minimum value is ?min among angles between the normal line and the reference line. The base surface angle change amount is the absolute value of the difference between ?max and ?min.

Abstract: An ophthalmologic apparatus includes a data acquisition unit, a movement mechanism, an image acquisition unit, an analyzer, and a controller. The data acquisition unit is configured to optically acquire data of a fundus of a subject's eye. The movement mechanism is configured to change relative position between the subject's eye and the data acquisition unit. The image acquisition unit is configured to acquire an image of the fundus. The analyzer is configured to specify at least one of a relative movement direction and relative movement amount of the data acquisition unit with respect to the subject's eye based on a flare region in the image and a reference position in the image. The controller is configured to control the movement mechanism based on the at least one of the relative movement direction and the relative movement amount.

Abstract: An optical imaging lens assembly is provided. The optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, and a fourth lens. The first lens has a negative refractive power. The third lens has a positive refractive power. At least one of the second lens or the fourth lens has a positive refractive power. A center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: CT2/CT4<0.5.

Abstract: An optical unit with a shake correction function include a fixed body, a movable body having an optical element, a swing support mechanism swingably supporting the movable body, and a shake correction drive mechanism structured to swing the movable body. The movable body includes a first abutting part abutted with a first stopper part of the fixed body at a time of a maximum swing, and a second abutting part abutted with a second stopper part of the fixed body at a time of a movement in an optical axis direction. The second stopper part and the second abutting part are separated so as not to contact with each other when the movable body is swung, and a separated distance along the optical axis direction between the second stopper part and the second abutting part is smaller than a separated distance between the first abutting part and the fixed body.

Abstract: The imaging lens consists of, in order from an object side, a first lens group, a stop, a positive second lens group, and a negative third lens group. The second lens group includes a negative lens and a positive lens. During focusing, the second lens group moves, and the third lens group does not move. Image blur correction is performed by moving the entire third lens group or a part of the third lens group in the direction intersecting the optical axis.

Abstract: The present disclosure relates to optical lenses and discloses an imaging optical lens The imaging optical lens includes from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power. A focal length of the first lens is f1, a focal length of the second lens is f2, a curvature radius of an object-side surface of the third lens is R5, a curvature radius of an image-side surface of the third lens is R6, and the following relational expressions are satisfied: 20?(R5+R6)/(R5?R6)?100; and ?10?f2/f1??2.7.

Abstract: The present invention provides an optical element rotating device, which is simple in structure and convenient in use, and can prevent the stuck phenomenon of the rotating motion of the optical element main body from affecting the using effect of the stage light, comprising a base body, a ball holder, a ball, a ball pressing plate, an elastic element, and a cover, wherein the ball holder is sleeved outside the periphery of the base body; and the ball, the ball pressing plate, the elastic element and the cover are sequentially positioned between the ball holder and the base body from bottom to top. A stage light optical device is also disclosed, comprising an optical element main body and the rotating device, wherein the optical element main body is positioned on the base body of the rotating device.