225 results about "Anterior lens" patented technology

An open chamber, accommodative, intraocular lens system operable to be positioned within an evacuated capsular bag of a human eye following extracapsular extraction of a natural crystalline lens is provided having an anterior refractive lens optic, a first haptic segment having a first end and being connected at said first end to a peripheral portion of said anterior lens optic and a second end and said haptic segment extending in an elliptical curve, in longitudinal cross-section, and at least a second haptic segment having a first end and being connected at said first end to a peripheral portion of said lens optic and a second end and said at least a second haptic segment extending in an elliptical curve, in longitudinal cross-section, and being operably joined with the second end of said first haptic segment to form an open chamber, elliptical shaped haptic accommodating support for the anterior lens within an evacuated capsular bag of a human eye.

An intraocular lens having an anterior lens member (48) presenting an anterior light-converging optic (52) and a posterior lens member (50) presenting a posterior light-diverging optic (68) for magnifying an observed image onto large regions of the retina (32) to permit central focus in patients suffering from AMD and a method of implanting the lens into the human eye (10). The anterior light-converging optic (52) is operably coupled with a flexible body (58) which extends radially therefrom and presents opposing bights (62) presenting termini (66) when the lens is viewed in cross-section. The posterior light-diverging optic (68) is operably coupled with an annular flange (76) which is arcuate in cross-section and mates with termini. Both the anterior and the posterior lens members (48, 50) have positioning holes (70, 80) formed therein permitting surgical implantation thereof. The IOL (46) is constructed of a flexible synthetic resin material such as polymethylmethacrylate and permits focusing upon objects located near to and far from the viewer.

An accommodating intraocular lens (IOL) comprises an anterior lens, a posterior surface and an articulating member joining the anterior lens and the posterior surface to define an enclosed cavity. The articulating member comprises anterior and posterior arms coupling the anterior lens and the posterior surface, respectively. The articulating member further comprising a peripheral portion. A posterior flex region is disposed about the posterior arm and at a distance from the peripheral portion. The posterior flex region permits the flexible posterior surface to articulate relative to the posterior arm, to decrease the radius of curvature of the posterior surface as the peripheral portions on opposing sides of the IOC move toward one another in a first state and to increase the radius of curvature of the posterior surface as the peripheral portions on opposite sides of the IOC move away from one another in a second state.

A family of microscopes with illumination systems directing a sheet of light having an approximately planar extension in an illumination axis of an illumination beam path and in a transverse axis orthogonally oriented to the illumination axis. The microscopes have detection devices used to detect light that is emitted by a sample region. The detection devices including a detection lens system disposed in the detection beam path and an optical detection element spaced from a front lens of the detection lens system and independently adjustable thereof. The optical detection element continuously varies the size of a detection image field and/or continuously displaces a focal plane of detection in the P-region.

The invention relates to a multi-lens intraoccular lens system having an accommodation material between the lenses. The system comprises an posterior lens attached to the posterior surface of the capsular bag and an anterior lens attached to the anterior surface of the capsular bag. The anterior and posterior lenses have different optical properties providing different degrees and types of correction. An accommodation material is placed between the anterior and posterior lenses. The accommodation material ma comprise of one or more macromers, which, when polymerized, adjust the properties of the accommodation material.

An eye shield attachment can be used in combination with a safety helmet. This helmet has a front brim continuous with a rim extending along each opposite side of the safety helmet to a pair of rim slots in the helmet's rim. The attachment has a pair of frames that can removably attach to the pair of rim slots in the helmet. The frames each have a fastening member that is lockable onto a corresponding one of the rim slots and adjustable to accommodate various depths in the rim slots. A support structure attached to the pair of frames extends along the rim toward the front brim. A front lens and corrective glasses may be attached to the support structure. A pliable bead may be attached to the front of the support structure and extend rearwardly to engage a wearer's forehead.

A corrective/ophthalmic lens comprising an impact lip extending from an anterior lens edge and a radial groove adjacent and parallel to the lens lip posterior surface, an eyewear system containing a corrective/ophthalmic lens and a method of making a lens is provided. The lens impact lip size is variable, determined by frame function and the degree of impact protection that is necessary. A posterior surface of the lens impact lip is beveled with a curvature that preferably substantially matches and coincides with the lens anterior curves, producing a lip with no corrective, low residual power effect or negative image effects. Due to the absence of image change and effects through the lens impact lip, in one aspect the present invention eliminates restrictions to the size of the impact lip.

A contact glass for ophthalmic surgery, including a concave anterior lens surface for placement on the eye and a suction channel annularly surrounding the periphery of the anterior lens surface. The suction channel allows the contact glass to be fixed to the eye by means of a vacuum, it is envisaged that the suction channel comprise a multiplicity of suction orifices, which are annularly arranged with respect to the anterior lens surface and through which the vacuum acts on the eye.

The invention relates to a intraocular lens system having a flexible anterior lens accommodation material behind the lens. The accommodation material may comprise of one or more macromers, which, when polymerized, adjust the properties of the accommodation material. The anterior lens is flexible such that the curvature of the lens changes during accommodation. The anterior lens may be used alone or in combination with a posterior lens.

The invention discloses an unmanned plane lens, and the lens sequentially comprises a front lens group, an aperture diaphragm and a rear lens group from the object space to the image space. The aperture diaphragm is located at the central part of the lens. The front lens group comprises a first lens with the negative focal length, a second lens with the negative focal length and a third lens with the positive focal length, wherein the first, second and third lenses are sequentially arranged from the object space to the image space. One surface, facing the object space, of each of the first, second and third lenses in the front lens group is a convex surface, and the surfaces, facing the image space, of the first and second lenses are concave surfaces. One surface, facing the image space, of the third lens is a convex surface. The rear lens group comprises a fourth lens with the positive focal length, a fifth lens with the negative focal length and a sixth lens with the positive focal length, wherein the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the object space to the image space. One surface, facing the image space, of each lens of the rear lens group is a convex lens. The surfaces, facing the object space, of the fourth and sixth lenses are convex surfaces, and one surface, facing the object space, of the fifth lens is a concave surface. The lens provided by the invention is low in distortion, is big in view angle, is high in resolution, and is strong in capability of resisting the environment temperature changes.

An imaging optical system has, in order from the object side to the image side thereof, a front lens group, an aperture stop, and a rear lens group. A lens located closest to object side in said front lens group always remains fixed in position, with satisfaction of the following conditions (1) and (2):

1.15≦fb/IHω≦1.7   (1)

−4.0≦fn/f≦−1.3   (2)

where f is a focal length of the whole imaging optical system, fn is a focal length of a first negative lens in said front lens group, fb is a back focus of the imaging optical system upon focusing on an object point at infinity, and IHω is a distance from an optical axis of a position where a chief ray from a maximum incident half angle of view (ω) upon focusing on an object point at infinity is imaged at the imaging plane.

A pair of eyeglasses includes a first frame, a front lens unit, a rear lens unit, a spacer frame unit for spacing the front and rear lens units, and a second frame mounted behind the first frame. The first frame includes a first frame section and a second frame section extending rearwardly from the first frame section and having a plurality of lens-engaging holes. The front lens unit includes a plurality of retaining blocks inserted respectively into the lens-engaging holes. The spacer frame unit is aligned with the first frame section in a front-to-rear direction, and includes at least one spacer frame having an inner periphery not projecting inwardly from an inner periphery of the first frame section.

The present invention relates to an airborne reconnaissance system for capturing images in a wide field of regard which comprises: (a) An array of a plurality of n prisms being one next to the other, each prism having an essentially flat and rectangular front surface, and at least an output surface wherein: (a1) a front surface of each of the plurality of prism is being directed toward a different section of a strip of terrain transversal to the flight direction of the aircraft, thereby collecting light rays coming mostly from that terrain strip section; (a2) each output surface of each of the prisms directs light rays which are received through said front prism surface toward a front lens of an optical unit; (b) A focal plane array; (c) Optical unit comprising a front lens, the front lens receiving light separately but simultaneously through the output surfaces of all the prisms, said optical unit comprises addition optics for directing the light received from said lens thereby to produce separate corresponding prism images on said focal plane array; (d) Control unit for periodically capturing all the images that are produced on the focal plane array at each instant, and transferring them into an electronic storage; and (e) Processing and combining unit for processing and combining all the separate stored prism images into a full image of the terrain relating to said wide field of regard.

The disclosure provides a mobile device. A housing comprises an accommodation space. An image sensing module is disposed in the accommodation space of the housing. A front lens is disposed in the accommodation space of the housing, wherein the front lens faces a first direction. A back lens is disposed in the accommodation space of the housing, wherein the back lens faces a second direction and the image sensing module is commonly used by the front lens and the back lens to save cost.

An imaging apparatus includes a front lens group, including a reflector element and a front lens element on the object side thereof, and a rear lens group; a support member, fixed to a fixed member that supports the reflector element, including a spherical-swinging operation support positioned behind the reflection surface of the reflector element and supporting a movable member supporting the front lens element to spherically swing about a predetermined point, a rotation preventer preventing the movable member from rotating about the optical axis of the front lens element, a detector supporter, and a mounting portion mounted to the fixed member; an actuator which drives the movable member to spherically swing the movable member in response to vibrations applied to the imaging optical system; a detector detecting positional variations of the movable member; and an adjuster which adjusts the position of the mounting portion relative to the fixed member.

The invention relates to a hybrid prime lens, and the prime lens comprises a front lens group, a diaphragm and a rear lens group from the object space to the image space along an optical axis. The front lens group consists of a first lens, a second lens and a third lens, wherein the first, second and third lens are sequentially arranged from the object space to the image space. The rear lens group consists of a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged from the object space to the image space along the optical axis. The lens comprises a glass lens and a plastic aspherical lens. The first, second, fifth and seventh lenses are lenses with the negative focal power. The third, fourth and sixth lenses are lenses with the positive focal power. The fourth and fifth lenses form a glued lens group with the positive focal power. According to the invention, the prime lens achieves the 4K resolution under the condition: FNO>=1.4. The prime lens achieves the day and night focus sharing and no defocusing effect under temperature from -40 DEG C to 80 DEG C, and enlarges the application range.

A multi-element IOL, comprising an anterior lens element comprising a light-adjustable material responsive to light of a first wavelength, and a posterior lens element comprising a light blocker capable of blocking light of the first wavelength, and a method of inserting the multi-element IOL.

The invention relates to a multi-waveband parfocal continuous focal length change optical device, which comprises six lens groups which are arranged on the same optical axis o-o and by which the total length of an optical system is kept constant in a process of continuously changing a focal length, wherein according to the lens groups, one end of a front lens group, which light enters, is used as a front end, and one end of an image surface is used as a rear end; and the six lens groups are the front lens group, a zooming group, a compensation group, a variable diaphragm group, a rear fixed group and a filter lens group from front to back. The multi-waveband parfocal continuous focal length change optical device has the advantages that multiple wavebands are imaged on the same image surface; the problem that an additional lens group is required to be connected or filter lenses with different thicknesses are used for compensating the position of the image surface because the image surface is not parfocal when the image surface is observed at different wavebands is solved; the structure is simplified; and the reliability of a system is improved.

The invention provides a 4-millimeter optical system for an ultrahigh image quality rigid tube endoscope. The optical system comprises an objective lens assembly and a relay system. The objective lens assembly comprises a front lens assembly and a rear lens assembly. The front lens assembly is composed of a first lens assembly body and a second lens assembly body, and the rear lens assembly is composed of a third lens assembly body and a fourth lens assembly body. An aperture diaphragm is located between the front lens assembly and the rear lens assembly. The relay system is composed of an image rotation lens with the ratio of the odd number to magnifying power being 1:1 and comprises three gluing-bar-like lenses, wherein the two gluing-bar-like lenses are identical, the distances between every two adjacent bar-like lenses are equal, and images formed by an objective lens are transmitted many times in a working lens tube, and finally seen by human eyes or received by a CCD detector through an eye lens. According to the system, the full view field angle is within 70 degrees, the maximum entrance pupil diameter is 0.3mm, the highest theoretical center resolution is 211 p/mm, the value of an MTF curve at the position of 1201 p/mm is larger than 0.3, and ultrahigh definition imaging can be achieved according to tests; stray light on the surfaces of the images can be avoided when the system is aligned to a light source, and the system is simple in structure, excellent in image quality and low in cost; an attached definition graph (1) is the graph of the optical system of the high-definition rigid endoscope, and the number one represents the objective lens assembly.

A device for forming an immersion film between a front lens of a microscope objective and a preparation on an inverted microscope. The device includes a protection device for preventing fluid leakage from the immersion film region, and an apparatus for supplying the immersion fluid (auto-immersion) to the immersion film region. The protection device is arranged statically in the main part of the microscope stand and the means for supplying immersion fluid to the immersion film region is connected to the protection device by means of an Aquastop system.