Abstract: A rotation regulating device and a lens barrel includes a rotating ring, a holder that rotatably holds the rotating ring, a rotation regulator that regulates the rotation of the rotating ring by contacting and stopping the rotating ring, and a receiver that receives a part of the rotation regulator. The rotation regulator is held on the holder and formed of an elastic body. The holder includes a holding shaft that holds the rotation regulator and a rotation stopper that stops the rotation regulator to prevent the rotation regulator from rotating about the holding shaft.

Abstract: The present invention provides for a device for use in non-invasive inspection measurement and/or monitoring of a human or animal subject's eye, the device having a first optical system which comprises illumination means for selectively directing illumination light onto a selected structure of the eye for direct and diffuse reflectance there from and for providing the illumination light in one or more pulses, receiving means for receiving light returning from the eye as a result of illumination by the illumination light and arranged to record the returning light intermittently at a selected timing relative to the pulse(s) of illumination light so as to discriminate between directly or diffusely reflected light returning from the selected structure and other reflected light for analysis of the said directly or diffusely reflected light.

Abstract: An optical system of the zoom lens comprises 20 pieces of lens whose surfaces are spherical surfaces and which are made of glass, and a fixed diaphragm. In the zoom lens, a front fixed group with a positive focal power, a zooming group with a negative focal power, a compensating group with a positive focal power, and a rear fixed group with a positive focal power are formed sequentially along a light incidence direction. Through reasonably arranging each element and selecting a proper material, the requirements of optical index of 50 times zooming ratio under focal distance of 750 mm to 15 mm and long focal distance of 350 mm are achieved, and this zoom lens can be used for confocal imaging in a visible light wave band and a near infrared wave band, so that it is applied in a day-and-night monitoring system.

Abstract: Nosepiece for eyeglass frames, which comprises a plate, an appendage projecting from the plate and comprising a convex portion, and a cup which is fixed to the frame of eyeglasses, is provided with two opposite lateral walls joined together by a connection wall, and houses the appendage. A screw is provided, engaged in first through holes of the cup, having the shank placed to traverse a second through hole of the appendage, the latter being susceptible of rotating with respect to the cup around a first longitudinal axis with the surface of its convex portion in contact and in sliding-with-friction relation with the internal surface of the connection wall of the cup, in order to maintain the plate in the angular position reached around the first longitudinal axis.

Abstract: A tether which passes through a hole in the eyeglass frame front or a hole affixed to the eyeglass frame front above either of the two lenses near the frame extension hinge. One end of the tether is held to the eyeglasses by a knot, bead, or protrusion which keeps it from passing through the hole in the eyeglass frame. The other end of the tether is attached to the clothing of the wearer. A gentle and secure removable, reusable, tension actuated tether coupling device for frame front of eyeglasses.

Abstract: Provided is a compact zoom lens having a high aperture ratio and high optical performance over an entire zoom range. The zoom lens includes, in order from object side to image side: first, second, and third lens units respectively having positive, negative, and positive refractive powers; an aperture stop; a middle lens group; and a final lens unit. An interval between adjacent lens units is changed during zooming. The third lens unit includes at least two positive lenses and at least one negative lens. A combined focal length (f12t) of first lens unit and second lens unit at telephoto end, a focal length (fn) of a lens unit (N) having a largest absolute value of the negative refractive power of the lens unit forming middle lens group, a focal length (f3) of third lens unit, and a focal length (ft) of zoom lens at telephoto end are appropriately set.

Abstract: An eyeglass positioning device configured to be positioned between a user's nose and eyeglasses frame to elevate multifocal lenses relative to a user's eyes to bring an intermediate or near field of vision into a line of sight for use with certain activities, such as computer use, when the user's head is in an upright and normal head tilt position. The eyeglass positioning device preferably comprises a connector and two support arms that simply sit on a user's nose in either an upright or an inverted orientation, providing greater flexibility of use and comfort. The eyeglass positioning device may be used with a variety of shapes, styles, and sizes or eyeglass frames without requiring attachment to the frames or obstructing the field of view through the lenses. The eyeglass positioning device may include a visual or tactile indicator to aid in placing the device on a user's nose.

Abstract: Aspects of the present invention relate to providing see-through computer display optics.

Abstract: An electrowetting device is provided that includes a lower substrate and an upper substrate facing each other, a first electrode positioned on the lower substrate, an edge electrode positioned on the lower substrate and adjacent to an edge of the first electrode, a hydrophobic insulating layer positioned on the first electrode and the edge electrode, a partition positioned on the lower substrate, a second electrode positioned on the upper substrate, and a first liquid and a second liquid positioned between the upper substrate and the lower substrate, wherein an electric field of a portion where the edge electrode is positioned is smaller than an electric field of a portion where the first electrode is positioned.

Abstract: Provided is a headup display apparatus that is capable of accurately outputting stable display light, a collimator lens, collimates image light, as parallel light, said image light having been outputted from a display means. A parallel light guide has a first surface, which has the parallel light from the collimator lens inputted thereto, and which reflects a part of the parallel light and transmits a part of the parallel light as transmitted light beams, and a second surface that reflects the parallel light to the first surface, said first surface and second surface being provided in parallel to each other. The parallel light guide outputs the transmitted light beams from the first surface, and the parallel light is inputted to the first surface at a predetermined angle.

Abstract: A 3D display apparatus is disclosed and has a display panel, a collimating backlight module, a lens array and a curved diffuser array. The lens array is mounted on the display panel and has a plurality of lens units arranged in an array manner. The curved diffuser array is mounted between the display panel and the lens array and includes a plurality of curved diffuser plates arranged in an array manner. The positions of the curved diffuser plates correspond to the positions of lens units, respectively. The light of a two-dimensional image projected by the display panel first goes through a diffusion treatment provided by the curved diffuser array, and then passes through the lens array to reconstruct a 3d scene.

Abstract: A light divider includes a light guide having first and second surfaces that reflect light incident on the guide and cause the light to propagate through a portion between the first and second surfaces. A first light dividing layer on the second surface reflects part of the light having propagated through the guide and transmits part thereof so that the light is divided into light fluxes. A first transparent piece on the second surface in a position where the light that the first light dividing layer has transmitted is incident, the first transparent piece having a first reflection surface that reflects the incident light, a second transparent piece that is provided on the second surface in a position where the light reflected off the first light dividing layer and reflected off the first surface is incident, the second transparent piece has a second reflection surface that reflects the incident light.

Abstract: A lens barrel module is disclosed to include a lens barrel unit and a flow path unit. The lens barrel unit extends along an axis and includes a peripheral wall that surrounds the axis and that has a first end adjacent to an object side of a lens assembly and a second end opposite to the first end and adjacent to an image side of the lens assembly. The peripheral wall defines an accommodation space configured as a series of accommodation sections for receiving the optical members. The flow path unit is formed in the lens barrel module and is in spatial communication with at least two of the accommodation sections. A lens assembly including the lens barrel module is also disclosed.

Abstract: Methods and apparatuses for determining contact lens intolerance in contact lens wearer patients based on tear film characteristics analysis and dry eye symptoms are disclosed. In embodiments herein, imaging of the ocular tear film is performed during contact lens wear. An analysis of the image of the ocular tear film is performed to determine one or more tear film characteristics of the ocular tear film. The tear film characteristics can be used to determine the effect or possible effect of contact lens wear on the ocular tear film, and thus be used to determine contact lens intolerance of the patient. The tear film characteristics used to analyze contact lens intolerance based on images of the ocular tear film involving contact lens wear may include dry eye symptoms, including but not limited to tear film (e.g., lipid and/or aqueous) thickness, tear film viscosity, and tear film movement rate in the eye.

Abstract: Adaptive glasses for drivers or passengers of a motor vehicle, the glasses comprising lenses having a screen whose coefficient of transmission is variable between a maximum value (CTMAX) and a minimum value (CTmin). According to one embodiment of the invention, the coefficient of transmission (CT) of the glasses lenses (28) is controlled according to a wireless communication protocol.

Abstract: An elastic eyeglass temple includes: a main body; one or more holes which are formed in one predetermined section or respectively in plural predetermined sections of the main body and which, if plural, can be spaced apart or in communication with one another; and one or more flexible members which correspond in configuration to the hole or respectively to the plural holes, which are fitted in the hole or respectively in the plural holes, and which lie compliantly along the main body, such that the one or more flexible members form a single unit with the main body. Once pivotally connected to the corresponding lateral end of an eyeglass frame, the eyeglass temple can stay elastic and provide an elastic contact with a lateral side of the user's head even after it has been pulled outward repeatedly for some time.

Abstract: Ophthalmic devices, such as contact lenses, may incorporate myopia control optics in combination with therapeutic agents also known to control myopia to create a drug delivery mechanism to inhibit or arrest the progression of myopia in individuals. Any number of contact lenses incorporating myopia control optics may be combined with a therapeutic agent such as atropine, atropine sulphate monohydrate, and/or pirenzepine.

Abstract: To provide an electrochromic display element, which contains: a display substrate; a display electrode; an electrochromic layer provided in contact with the display electrode; a counter substrate provided to face the display substrate; a counter electrode; a charge retention layer provided in contact with the counter electrode; and an electrolyte layer filling between the display substrate and the counter substrate, wherein the electrochromic layer contains titanium oxide particles, and metal hydroxide is dispersed on surfaces and in inner parts of the titanium oxide particles.

Abstract: One stem reversible glasses include a first lens and a second lens. A stem having a proximal end and a distal end is connected adjacent one of the first lens and the second lens at the proximal end. An earpiece is connected adjacent the distal end of the stem, the earpiece including means for securing the earpiece to a right ear of a user when the glasses are in a first reading position and for securing the earpiece to a left ear of the user when the glasses are in a second reading position. A nosepiece is disposed between the first lens and the second lens dimensioned and configured for receiving a nose of a user when the glasses are in either the first reading position or the second reading position.

Abstract: The embodiments disclosed herein relate to a transparent material to provide protection to a person's eyes from harmful wavelengths of the light spectrum, overall visual comfort, or improved vision such as color enhancement, target recognition and other functions, while selectively transmitting more of certain wavelengths of the light spectrum that have a therapeutic benefit such as healing or general mood modifier. The transparent material may be a lens or a shield which is disposed in front of the wearer's eyes.