Abstract: A zoom lens includes, a lens unit Lp having the highest positive refractive power, a lens unit Ln having negative refractive power, and a lens unit Lp2 having positive refractive power. In a first region, focusing from an infinite distance to a predetermined finite distance and zooming are able to be performed. In a second region in which macro driving is performed from a telephoto end to a macro end, two or more lens units are moved during macro driving so that the lens unit Lp is located closer to the object side than at a wide-angle end, a distance between the lens unit Lp and the lens unit Ln is larger at the macro end than at the wide-angle end, and a distance between the lens unit Ln and the lens unit Lp2 is smaller at the macro end than at the wide-angle end.

Abstract: A method of taking an ophthalmic measurement is carried out with an electronic handheld device having a touchscreen display and a camera unit for producing digital photographic images with the handheld device that are displayed on the touchscreen display in real time. The handheld device has a orientation sensing unit for determining the orientation of the handheld device. A subject is positioned wearing a spectacle frame on the subject's head at a position so that real time images of the subject's head with the spectacle frame from the camera unit are displayed in the touchscreen display. The electronic handheld device is moved with the real time images of the subject's head and eyewear being displayed within the display until the orientation sensing unit of the handheld device measures that the handheld device is at a selected oriented position.

Abstract: An imaging lens includes an aperture stop and an optical assembly which includes: in order from an object side to an image side: a first lens element with a positive refractive power having a convex aspheric object-side surface and a concave aspheric image-side surface; a plastic second lens element with a positive refractive power having an aspheric object-side surface and a concave aspheric image-side surface; a plastic third lens element with a positive refractive power having aspheric object-side and image-side surfaces; a fourth lens element with a negative refractive power having a concave object-side surface and a convex image-side surface; a plastic fifth lens element with a positive refractive power having a convex aspheric object-side surface, a concave aspheric image-side surface and more than one inflection point. The imaging lens satisfies the following conditions: 0.3<(R5+R6)/(R5?R6)<1.15 and 1.2<TL/ImgH<1.65.

Abstract: A novel pair of eyewear includes a frame, one or more optically active eyepieces, a first temple piece and a second temple piece. The first and second temple pieces each include an adjustment mechanism for adjusting the length and angle of the first and second temple pieces. In a particular embodiment, the first and second temple pieces each include a locking mechanism for fixing the length and angle of the first and second temple pieces with respect to the frame.

Abstract: The 1st positive lens unit is located closer to the object side at the telephoto end than at the wide angle end. The distance between the 1st negative lens unit and the 1st positive lens unit is larger at the telephoto end than at the wide angle end. The distance between the image side lens unit group and the 1st negative lens unit varies during zooming from the wide angle end to the telephoto end. The image side lens unit group comprises a 2nd positive lens unit and a 3rd positive lens unit. The distance between the 2nd positive lens unit and the 1st negative lens unit is smaller at the telephoto end than at the wide angle end. The distance between the 3rd positive lens unit and the 2nd positive lens unit varies during zooming from the wide angle end to the telephoto end.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power, and is configured to move the second lens unit, the third lens unit, and the fourth lens unit during a zooming operation to change an interval between adjacent lens units. A moving amount of the second lens unit during a zooming operation from a wide angle end to a telephoto end, a focal length of the second lens unit, and transverse magnification of the third lens unit at the wide angle end and the telephoto end are individually set appropriately.

Abstract: More particularly, a wide-angle optical assembly for an IR camera is described, comprising a lens system consisting of an object-side lens (2) and an image-side lens (3), and an aperture stop (1) on the object-side of the assembly, wherein: the object-side lens (2) and the image-side lens (3) are positive meniscus lenses; all centers of vertex radii of the lens surfaces are oriented towards the object-side, defining for each lens a concave surface and a convex surface; the thickness (8) of the object-side lens (2) is larger than 0.60 EFL; the thickness (9) of the image-side lens (3) is between 0.30 EFL and 0.70 EFL; 0.95<BFL/EFL<1.2; and, the EFL amounts to between 55% and 75% of the image plane diagonal.

Abstract: A zoom lens and a zoom lens module are provided. The zoom lens is configured to form an image of an object at an object side onto an image plane at an image side. The zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group disposed in sequence from the object side towards the image side. The refractive powers of the first lens group, the second lens group, and the third lens group are negative, positive, and negative, respectively. The zoom lens satisfies 1.90<|T1G/FW|<2.40. T1G is a distance of the first lens group along an optical axis of the zoom lens, and FW is an effective focal length of the zoom lens when the zoom lens is at a wide-end.

Abstract: Some embodiments provide a lens including a lens body and an optical filter configured to attenuate visible light in certain spectral bands. At least some of the spectral bands can include spectral features that tend to substantially increase the colorfulness, clarity, and/or vividness of a scene. In certain embodiments, eyewear incorporates an optical filter that enhances chroma within one or more spectral bands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.

Abstract: An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.

Abstract: A focusing lens assembly for a camera includes a shaft member disposed in parallel with an optical axis of the camera, a lens mounting member through which the shaft member penetrates and on which a focusing lens is mounted, a focusing lens driving motor configured to allow the lens mounting member to slide according to the shaft member, and a rotating unit configured to rotate the lens mounting member in a first direction in which the focusing lens is deviated from the optical axis or in a second direction in which the focusing lens is arranged on the optical axis according to an ON/OFF operation of the camera power.

Abstract: A conformable covering comprises an outer portion with rigidity to resist movement on the cornea and an inner portion to contact the cornea and provide an environment for epithelial regeneration. The inner portion of the covering can be configured in many ways so as to conform at least partially to an ablated stromal surface so as to correct vision. The conformable inner portion may have at least some rigidity so as to smooth the epithelium such that the epithelium regenerates rapidly and is guided with the covering so as to form a smooth layer for vision. The inner portion may comprise an amount of rigidity within a range from about 1×10-4 Pa*m3 to about 5×10-4 Pa*m3 so as to deflect and conform at least partially to the ablated cornea and smooth an inner portion of the ablation with an amount of pressure when deflected.

Abstract: A colored contact lens having a transparent body with a concave surface and a convex surface. A first colored material layered externally on one of the surfaces of the lens. A second colored material is layered externally on the lens and is arranged relative to the first colored layer of material so as to provide an inversion marker when viewed from the concave side of the contact lens whereby enabling the wearer of the contact lens to properly install the lens.

Abstract: A toric contact lens utilizes concentric annual rings, a continually varying lens design as a function of distance from the lens center or any other function to create a range of cylinder axis zones on a single lens.

Abstract: An optical imaging lens set from an object side toward an image side along an optical axis in order includes: a first lens element having an image-side surface with a convex portion in a vicinity of its circular periphery, a second lens element having an object-side surface with a convex portion in a vicinity of its optical axis, a third lens element having an object-side surface with a concave portion in a vicinity of its optical axis, a fourth lens element with positive refractive power, and a plastic fifth lens element having an image-side surface with a concave portion in a vicinity of its optical axis.

Abstract: The zoom lens includes at least five lens groups including first, second, third, fourth and fifth lens groups respectively having positive, negative, negative, positive and positive refractive powers. At least four movable lens groups are moved during zooming. At least two movable lens groups placed further on an image side than an aperture. C1 and C2 lens groups are moved so as to draw mutually different loci and such that a distance therebetween becomes maximum at a middle zoom position. The C1 and C2 lens groups are located further on a same side at the telephoto end than at a wide-angle end. At least one of D1 and D2 lens groups is moved during the zooming so as to be located further on an object side at a telephoto end than at the wide-angle end. A distance therebetween at the telephoto end becomes larger than that at wide-angle end.

Abstract: The catadioptric system includes a first optical imaging system (catadioptric part) causing a light flux from an object to form an intermediate image and a second optical imaging system (dioptric part) causing the light flux from the intermediate image to form an image. In the first optical imaging system, the light flux sequentially passes a first transmissive portion, a second reflective portion, a first reflective portion and a second transmissive portion. In the second optical imaging system, consecutive four lens surfaces among plural lens surfaces placed between an aperture stop and an image surface have a negative combined refractive power, and a condition of ?0.52<?4n—max·Ymax<?0.14 is satisfied, ?4n—max represents a maximum value of the negative combined refractive power, and Ymax represents a maximum object height in a field-of-view of the catadioptric system at the object.

Abstract: This lens barrel includes a first frame, a second frame, a third frame, an annular portion, and a bayonet portion. The bayonet portion protrudes to both sides beyond the width of the rectilinear guide portion in the peripheral direction, and is divided by a plurality of slits. The bayonet portion is supported on the second frame at two or more places including both sides of the rectilinear guide portion in the peripheral direction.

Abstract: Apparatus, systems and methods employing contact lens sensors are provided. In some aspects, a contact lens includes a substrate and a circuit. The circuit can include: one or more sensors disposed on or within the substrate, that sense a feature associated with a wearer of the contact lens; and a compensation circuit disposed on or within the substrate, coupled to the sensor(s) and that outputs information to adjust an output of the sensor(s). The compensation circuit can include: a temperature component that senses the temperature of the sensor(s); and a communication component that outputs information indicative of the temperature of the sensor(s), and receives information associated with adjusting the output of the sensor(s). In other aspects, a contact lens includes a circuit that senses the body temperature, or ambient temperature outside of the body, of the contact lens wearer. Sensor fusion and/or calibration can be performed based on the information.

Abstract: A virtual image display device has a light guide device in which the half mirror layer (the semi-transmissive reflecting film) of the light guide member is formed on the partial area of the first junction surface, and the second junction surface of the light transmitting member is bonded to the first junction surface in at least the exceptional area. Therefore, it is possible to increase the bonding strength of the first junction surface and the second junction surface, namely the strength of the light guide device composed of the light guide member and the light transmitting member combined with each other even in the case in which the attachment force of the half mirror layer (the semi-transmissive reflecting film) with respect to the first junction surface is not sufficiently strong.