Abstract: A camera module with double barrels, which has an anamorphic lens structure, includes: a first lens barrel containing a plurality of lenses and at least one anamorphic lens for focusing an image of an object at a position inside the camera module; a second lens barrel surrounding a portion of the first lens barrel and separately rotating from the first lens barrel; a housing coupled in a screwed manner to the second lens barrel for focusing of the first lens barrel; and a circuit board on which an image sensor for converting the image received by the first lens barrel to an electrical signal is provided and which is electrically connected to the camera module.

Abstract: A lens unit is equipped with a lens, through which light from an object enters, and a lens barrel for holding the lens. An optical extending member is employed when observing a focal image of the lens with a microscope. A receiving portion having a receiving surface, for receiving a front end facet of the optical path extending member within the lens barrel that faces toward the lens, is formed at a portion of the lens barrel. A mounting portion positioned further rearward from a rear end facet of the optical path extending member, having a guide insertion aperture that extends in a direction perpendicular to the receiving surface and a mounting surface that extends in a direction parallel to the receiving surface is formed at the periphery of the guide insertion aperture is formed at a portion of the lens barrel.

Abstract: The prism glasses include movable prism lenses and, optionally. detachable temples. The movable lenses permit the user to alter the viewing angle from substantially 90 degrees downward to substantially 90 degrees upward. The glasses include a planar frame plate, a bridge, a forward outboard face and view ports therethrough. Two prisms, one for each view port, transmit the image. Prism frames have mounting elements for attachment and detachment to complementary mount elements on the frame. The mounts permit either rotation or removal and re-insertion on the frame. In a first mode of operation, the prism transmits a 90 degrees image. The prism mounts cooperate with the complementary frame mounts and the prism lenses can be (a) removed and re-positioned at a 180 degrees position or (b) moved 180 degrees from the downward 90 degree viewpoint to an upward 90 degree viewpoint to the second operational mode.

Abstract: An imaging lens includes in order from an object side, a stop and a first lens to a fourth lens. Both the surfaces of a third lens have surfaces including at least one inflection point, and an inclination of each surface at the terminal end part of a periphery within an effective diameter collapses toward the image side. And 0.1<D3/D4 <2.0, ?d1??d2>25, 0.4<f1/f3<1.6 and 0.3<f/f3<1.5 are satisfied, where D3 is an air space on an optical axis between the first lens and the second lens, D4 is a central thickness of the second lens, ?d1 and ?d2 are Abbe numbers of the first lens and the second lens, f1 and f3 are focal lengths of the first lens and the third lens and f is a focal length of an entire system.

Abstract: Disclosed is a miniature optical system. The miniature optical system includes a first lens; a second lens; a third lens; and a fourth lens, wherein the first to fourth lenses are sequentially aligned from an object side to an image side of the system. The lenses satisfy the following equation: ?1.5<f2/ttl<?0.5, where f2 is the focal length of the second lens and ttl is a distance from an object side of the first lens to an image side of the system.

Abstract: An image forming optical system of the present invention includes at least one cemented lens which includes a first lens element (e1), a second lens element (e2), and a third lens element (e3). The first lens element e1 is cemented to a surface on one side of the second lens element e2, and the third lens element e3 is cemented to the other surface of the second lens element e2. The first lens element e1 is a positive lens, and a combined refracting power of the second lens element e2 and the third lens element e3 is negative. The cemented lens satisfies a predetermined conditional expression.

Abstract: A projection zoom lens projects an optical image of rays, which are irradiated from a light source onto a light valve and are modulated by a predetermined image displayed on the light valve, onto a screen. The projection zoom lens includes a plurality of lens groups that is formed as a telecentric system on the reduction side thereof and includes at least two movable lens groups which are movable during zooming. In the projection zoom lens, the plurality of lens groups is arranged to include, in order from a magnification side, at least a first lens group and a second lens group. The first lens group has a negative refractive power, remains stationary during zooming, and performs focusing. The second lens group has a negative refractive power and remains stationary during zooming and focusing.

Abstract: A transparent optical component (10) comprises at least one transparent set of cells (15) juxtaposed parallel to one surface of the component, each cell being separated by absorbing walls (18) parallel to the component surface, and each cell being hermetically sealed and containing at least one substance with an optical property. The optical component may be cut out along a predefined contour and optionally drilled. The invention also relates to a method of producing such an optical component and its use for the production of an optical element. The optical element may especially be a spectacle lens.

Abstract: A lens is presented in which the lens includes a substrate and an electrode layer. The electrode layer is positioned upon the substrate. The electrode layer has radially alternating rings of electrodes and resistive material. When voltage is applied across two adjacent electrodes the profile of the electric field therebetween is linear. When voltage is applied to the rings of electrodes, the optical phase profile of the lens closely approximates the optical phase of ideal spherical aberration correction.

Abstract: Disclosed is a zoom lens system including a first lens unit having a positive optical power, a second lens unit having a negative optical power, and a rear unit including at least one lens unit, which are disposed in the stated order from an object side to an image side. At least two lens units move for zooming so that a distance between adjacent lens units is changed. In this zoom lens system, the first lens unit includes a composite optical element in which a first optical element having a positive optical power and a second optical element having a negative optical power are cemented to each other. Refractive indexes and Abbe numbers of materials of the first optical element and the second optical element are set appropriately so that high optical performance is realized.

Abstract: An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured, comprising an aperture stop S and a junction type compound lens 14 having a positive refractive power, wherein the aperture stop and the junction type compound lens are arranged in this sequence from an object side to an image side. The junction type compound lens comprises a first lens L1, a second lens L2 and a third lens L3 arranged in this sequence from the object side to the image side. The first lens and the third lens are formed of a curable resin material, and the second lens is formed of an optical glass. The first lens and the second lens are directly bonded, and the second lens and the third lens are directly bonded. The object side face of the first lens and the image side face of the third lens are aspherical.

Abstract: The invention discloses a package structure of a liquid lens which includes a first substrate and an electrode on the first substrate. The package structure includes a second substrate, a first sleeve, a second sleeve, a first circular member, and a second circular member. The first substrate is fixed at the first sleeve to form a holding chamber for receiving a first dielectric liquid and a second dielectric liquid. The second substrate is disposed on the liquid lens and fixed at the second sleeve. The first sleeve is fixedly connected inside the first sleeve and the second substrate. The second circular member is disposed on the first circular member. The first and second circular member are located and urged between the first sleeve and the second sleeve to form a reserved expansion chamber.

Abstract: A binocular indirect opthalmoscope has a light source for producing an illumination beam and an illumination mirror (7) for directing the illumination beam to an eye to be viewed. The opthalmoscope also has, viewing optics including left-hand and right-hand eyepieces (12,13) and an optical splitter (9,10) for directing light along left-hand and right-hand viewing paths to the two eyepieces. An aperture holder (20) is pivotally mounted in a frame (3,5,6) of the opthalmoscope and adjusts the size of the illumination beam, under the control of a manually rotatable control knob (24). The movement of the aperture holder is transmitted, by means of mechanical linkage, to a moveable carriage (15) on which is mounted both the optical splitter and the illumination mirror, so that when the user moves the control knob to adjust the size of the illumination beam the optical splitter and the illumination mirror are also adjusted in position with respect to the opthalmoscope frame.

Abstract: A method for determining an optimal eyeglass lenses design for a viewer (1) comprising the successive steps of: showing the viewer (1) a stereoscopic scene including optical effects of a first lens design;—introducing a relative movement between the viewer (1) and the shown stereoscopic scene, said scene being shown with optical effects of the first lens design; expressing the viewer's opinion; showing the viewer (1) a stereoscopic scene including optical effects of a modified lens design; introducing a relative movement between the viewer (1) and the shown stereoscopic scene, said scene being shown with the modified lens optical effects; expressing again the viewer's opinion; repeating the three last steps up to viewer's satisfaction. A system for customizing vision correction suitable to implement said method. Related computer program for dynamically calculating a stereoscopic image. Related computer program for actuating an electro-active component.

Abstract: A monocular image of a fundus of an eye under examination is captured via a photographic stop for monocular photography, and two stereographically viewed images are captured with a parallax via two photographic stops for stereographic photography that are decentered from a photographic optical axis. Defocused images are captured in the stereographic photography due to the deviation of the photographic stops from the optical axis. A corrective lens is inserted into the photographic optical path in order to correct the defocus in the stereographic photography. This makes it possible to readily correct defocus generated by deviation of the photographic stops from the photographic optical axis even when switching between monocular and stereographic photography modes.

Abstract: The invention relates to a method for producing an ophthalmic lens exhibiting optical function coexisting in producing an optical component (10) incorporating at least one type of active material (2) which is distributed in a parallel direction to the surface thereof. Said active material exhibits a radiation-modifiable optical property. The active material (5) portions disposed through the component (10) surface are, afterwards, selectively irradiated in such a way that the optical function is obtainable by modulating said property from one portion to another one, wherein the sizes of said portions are less than 1 mm.

Abstract: An imaging lens consisting of in order from an object side to an image surface side, a diaphragm, a first lens that is a meniscus lens having a positive power whose convex surface faces the object side and a second lens that is a lens having a negative power whose concave surface faces the object side, wherein a condition expressed by the following expression is satisfied: 0.05?r1/r2?0.29, where r1 is a center radius curvature of the object side surface of the first lens and r2 is the center radius curvature of the image surface side of the first lens.

Abstract: Animated image vision tests take advantage of the ability of our eyes to detect both distance and motion. Moving images, such as rotating segmented circles, let the eyes detect motion as to the size, distance, and rotation direction of that moving image. That motion detection is much more precise than the interpretation of multiple static letters or static images. Using rotating images for vision testing rather than static images creates an acuity test more accurate than current tests, a test that is faster to use, and a test that doesn't require the ability to read.

Abstract: An apparatus is provided for aligning an implant with a visual axis of an eye of a patient. The apparatus has an instrument with an instrument axis and an aperture through which the patient may look along the instrument axis. The implant includes an aperture having an implant axis that can be positioned substantially collinear with the instrument axis. The implant further includes a substantially opaque annulus extending between the aperture and an outer periphery of the implant. The annulus has a nutrient transport structure for conveying nutrients between anterior and posterior surfaces of the implant.

Abstract: An optical component (10) comprises a transparent set of cells (15; 25) juxtaposed in parallel to a surface of the component. Each cell is hermetically sealed and contains a substance with an optical property. The set of cells comprises cells of several sizes. The size of the cells can be varied between various locations of the surface of the component (10), for making it possible to cut out the component without altering its optical properties. Furthermore, the variation in size of the cells serves to prevent diffraction or scattering from being visible in certain zones of the component.