Abstract: An optical system has, in order from an object: a first lens having negative refractive power; a second lens having positive refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having negative refractive power; and a sixth lens having positive refractive power, wherein the following conditional expression (1) is satisfied: 1.52<L3R1/f3 - - - (1), where L3R1 denotes a radius of curvature of an object side lens surface of the third lens L3, and f3 denotes a focal length of the third lens L3.

Abstract: An imaging optical system including, in order from an object side to an image side, a first lens group having a negative refractive power, an aperture stop, a second lens group having a positive refractive power, is provided. The first lens group includes in order from the object side a first lens having a positive refractive power and a meniscus shape turning a convex surface to the object side, a second lens having a negative refractive power, and a third lens having a positive refractive power. A lens surface positioned closest to the image side in the first lens group is a concave surface to the image side, and a lens surface positioned closest to the object side in the second lens group is a concave surface to the object side.

Abstract: Provided is an optical system having, in order from an Object, a first lens group (G1) having negative refractive power and a second lens group (G2), wherein the first lens group (G1) includes, in order from the object, a first negative lens (L11) and a second negative lens (L12) having a concave surface facing the object, and the following conditional expression (1) is satisfied: 7.94?(?fn12)/f<48.00??(1) where fn12 denotes a focal length of the second negative lens (L12), and f denotes a focal length of the entire optical system.

Abstract: A telescopic optical system that can be compact and lightweight is provided, and an optical apparatus including the telescopic optical system is also provided.

Abstract: An optical lens of the present disclosure assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, an optical filter and a sensor. The optical lens also has an axis. The first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element are symmetrical about the axis.

Abstract: A thin film coating for an ophthalmic lens is provided, that comprises alternating layers of high and low index materials. The coating attenuates the transmission of light and has a spectral reflectance curve characterized by a reflectance of at least about 90% in a range from 320 nm to 420 nm, by 50% at 440 nm, by 5% or less at 460 nm, and wherein the spectral reflectance curve is monotonically or strictly decreasing between 420 nm to 460 nm.

Abstract: In assembling a binocular loupe device, a loupe of the binocular loupe device is attached to an appropriate position at a correct angle according to a pupil position of a user in a near vision state. A rectangular, transparent measurement assisting plate fixed to a frame before attachment of a loupe is worn by a user, and the face of the user in a near vision state is photographed by a camera from a work object point P to obtain a first image. The first image is subjected to arithmetic processing by a computer to measure, on the first image, coordinate positions of respective four vertexes of the measurement assisting plate and coordinate positions of respective left and right pupils of the user in the near vision state, and determines the loupe attachment position and/or loupe attachment angle on a plane of the plate member from the measured coordinate positions.

Abstract: An eyepiece for a head wearable display includes a curved lightguide component, a curved see-through component, an output coupler, and a prescription layer. The curved lightguide component guides display light received at an input region and releases the display light along an eye-ward direction in a viewing region. The output coupler is disposed at the viewing region to redirect the display light towards the eye-ward direction for output from the curved lightguide component. The output coupler is at least partially transmissive to ambient light incident through a world-facing side such that the viewing region is see-through. The curved see-through component is mated to the world-facing side of the curved lightguide component. The prescription layer has a first side mated to an eye-facing side of the curved lightguide component and a second side having a curvature that introduces prescriptive lensing to both the ambient light and the display light.

Abstract: The present invention generally concerns a one piece eyewear having concealed hinges made via 3D printing. More specifically, the invention includes a U-shaped hinge with irregular offsets that are blended parametric curves that connect a lens frame to temple bars. The hinge is most flexible at its parabolic cross section and allows the temple bars to open and close, mimicking the rotational and stress bearing properties of traditional mechanical hinges. The eyewear is sculpted in a 3D modeling program that exports digital instructions for rendering the hinges, lens frame, and temple bars as a single construct by a 3D printer. The one piece eyewear is capable of accepting prescription or non-prescription lenses. A method for making the eyewear having concealed hinges is also disclosed.

Abstract: Tracking a user head position detects a change to a new head position and, in response, a remote camera is instructed to move to a next camera position. A camera image frame, having an indication of camera position, is received from the camera. Upon the camera position not aligning with the next camera position, an assembled image frame is formed, using image data from past views, and rendered to appear to the user as if the camera moved in 1:1 alignment with the user's head to the next camera position.

Abstract: The present invention relates to a Fresnel lens and a respective mold, the lens comprising a plurality of draft facets, wherein the draft angle of the draft facets has at least two different angular values for two different draft facets, in particular, wherein the draft angle is bigger for a draft facet closer to the edge of the lens or, respectively, of the mold, than for a draft facet closer to the center of the lens or, respectively, of the mold.

Abstract: A zoom lens includes in order from an object 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 at the time of zooming, the first lens unit is fixed, and at least two lens units positioned on an image side of the first lens unit move, and the first lens unit includes a plurality of lenses, and also has a cemented lens, and the cemented lens are included in the plurality of lenses, and the plurality of lenses includes one negative lens and three positive lenses, and the following conditional expressions (1), (2), and (3) are satisfied. 1.5<ndp<1.

Abstract: A see-through optical display apparatus includes an image generating component, a tilted primary mirror having a non-flat, freeform, front optical surface, and a tilted secondary mirror having a non-flat, freeform, front optical surface, wherein the apparatus has an external pupil. A method for designing/making a see-through optical display apparatus for displaying an image generated by or on an image generating component of the apparatus.

Abstract: Provided are light source module and backlight unit. A wire grid polarizer including a substrate, and a plurality of conductive wire patterns configured to be formed parallel to one another on the substrate, wherein each of the conductive wire patterns includes a first conductive wire pattern, an insulating layer and a second conductive wire pattern and the first and second conductive wire patterns are electrically insulated from each other and have different shapes.

Abstract: An imaging lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has negative refractive power. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being both aspheric. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, wherein two surfaces of the fifth lens element are aspheric. The sixth lens element has an image-side surface being concave in a paraxial region thereof and comprising at least one convex shape in an off-axial region thereof, wherein two surfaces of the sixth lens element are aspheric.

Abstract: An optical apparatus includes a driving unit, a holder holding the driving unit, a moving member holding an optical member and movable by drive of the driving unit, and a guide fixed to the holder in parallel to an optical axis direction. The driving unit is fixed to the holder by a screw and a nut. The nut includes a first plane part. The nut is disposed so that the first plane part of the nut is substantially orthogonal to a line connecting a center of the guide and centers of the screw and the nut when viewed in the optical axis direction.

Abstract: A lighting device (1) including at least one laser-diode bar with a plurality of emitters arranged adjacently to one another in a first direction and able to emit sub-beams during operation. The sub-beams having a lower beam divergence in a first direction that forms a slow-axis direction than in a second direction that forms a fast-axis direction and is perpendicular to the first direction. At least some of the emitters having a height offset in relation to the other emitters. A fast collimation means positioned behind the at least one laser-diode bar in a beam-propagation direction perpendicular to the slow-axis direction and the fast-axis direction. Beam transformation means positioned behind the fast-axis collimation means in the beam-propagation direction and designed to rotate the sub-beams through 90° as they pass thorough said means.

Abstract: In a MEMS device (1), a first drive portion (40) is divided into a first drive section (41) and a second drive section (42). A second drive portion (50) is divided into a third drive section (51) and a fourth drive section (52). The first drive section, the second drive section, the third drive section, and the fourth drive section are controlled for driving independently of each other to incline an optical component (10).

Abstract: An object of the present invention is to provide a curable composition that can be cured satisfactorily and can form a cured product having a high glass transition temperature as maintained and having high mechanical strength. A curable composition includes a siloxane (A), a cycloaliphatic epoxide (B), and a curing agent (C). The siloxane (A) contains at least two epoxy groups per molecule. The cycloaliphatic epoxide (B) in the curable composition is preferably a compound represented by Formula (I): wherein X is selected from a single bond and a linkage group.

Abstract: A spectacle lens having a front surface intended to be fitted away from the eye. The spectacle lens includes a substrate made from mineral glass or an organic material. The spectacle lens has selective light wavelength filter properties. The selective light wavelength filter properties include a spectral transmittance between 80% and 95% for all wavelengths in a wavelength range between 428 nm and 452 nm for a light ray entering the spectacle lens on the front surface at an angle of incidence of 0°, a spectral transmittance between 95% and 100% for all wavelengths in a wavelength range between 500 nm and 700 nm for a light ray entering the spectacle lens on the front surface with an angle of incidence of 0° and a yellowness index of no more than 10 for a standard illuminant D65 and a standard observer function of 2° (D65/2°).