The photochromic composition contains one or more compounds represented by General Formula A, one or more compounds represented by General Formula B, and one or more compounds represented by General Formula C is provided. In General Formula A, R.sup.1 to R.sup.6, B.sup.1, and B.sup.2 each independently represent a hydrogen atom or a substituent. In General Formula B, R.sup.7 to R.sup.12, B.sup.3, and B.sup.4 each independently represent a hydrogen atom or a substituent, and R.sup.13 and R.sup.14 each independently represent an electron-donating group. In General Formula C, R.sup.15 to R.sup.20, B.sup.5, and B.sup.6 each independently represent a hydrogen atom or a substituent, and one of R.sup.21 and R.sup.22 represents a hydrogen atom and the other represents an electron-donating group.

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An imaging optical system lens assembly includes six lens elements, which is, in order from an object side to an image side along an optical path, 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 object-side surface of the first lens element is concave in a paraxial region thereof, the image-side surface of the first lens element is convex in a paraxial region thereof. The second lens element has positive refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof. The fifth lens element has positive refractive power.

An optical imaging lens includes a first, a second, a third, a fourth, a fifth, a sixth, a seventh and an eighth lens elements from an object side to an image side in order along an optical axis. The optical imaging lens satisfies: EFL/(G45+T5)≤8.500, wherein EFL is an effective focal length of the optical imaging lens, G45 is an air gap from the fourth lens element to the fifth lens element along the optical axis, and T5 is a thickness of the fifth lens element along the optical axis.

A polarizable compact is provided with high productivity, which makes a polarizing sheet resistant to the occurrence of color unevenness and voids and also resistant to the occurrence of variations in polarization degree accompanying thermal shrinkage and the like of a protective layer (protective film). A polarizable compact is used for glasses, and a method of manufacturing the same. An injection-molded portion made of a transparent plastic material is thermally bonded to the concave surface side of a polarizing sheet having a predetermined curvature radius. The polarizing sheet has a polarizer layer held between first and second protective layers respectively serving as a convex surface side and a concave surface side. Both the first and second protective layers are formed from transparent films by a casting method with retardation (Re)≤50 nm. The transparent films for the first and second protective layers are respectively formed from an acylcellulose-based film and a polyamide-based film.

According to an embodiment, the pH of a diisocyanate composition and a diamine hydrochloride composition used in the preparation of an optical lens is adjusted to a specific range, whereby it is possible to enhance not only the yield and purity of the diisocyanate composition but also the optical characteristics of the final optical lens by suppressing the striae and cloudiness. Specifically, according to the process of the embodiment, the amount of an aqueous hydrochloric acid solution introduced to the reaction may be adjusted to control the pH of the diisocyanate composition to a desired range, thereby enhancing the yield and purity. Accordingly, the process for preparing a diisocyanate composition according to the embodiment can be applied to the preparation of a plastic optical lens of high quality.

An example device includes a fluid lens, where the fluid lens includes a membrane, a substrate, and a fluid located within an enclosure formed at least in part by the membrane and the substrate. The membrane may be an elastic membrane. The fluid may include an amount of an additive that is effective to appreciably reduce bubble formation within the fluid, such as when a negative pressure is applied to the fluid. In some examples, the additive may include particles, such as nanoparticles. The additive may include a thixotropic agent that helps to impart an appreciable thixotropic property to the fluid. Various other methods, systems, and computer-readable media are also disclosed.

Silicone-containing light fixture optics. A method for manufacturing an optical component may include mixing two precursors of silicone, opening a first gate of an optic forming device, moving the silicone mixture from the extrusion machine into the optic forming device, cooling the silicone mixture as it enters the optic forming device, filling a mold within the optic forming device with the silicone mixture, closing the first gate, and heating the silicone mixture in the mold to at least partially cure the silicone. Alternatively, a method for manufacturing an optical component may include depositing a layer of heat cured silicone optical material to an optical structure, arranging one or more at least partially cured silicone optics on the layer of heat cured silicone optical material, and heating the heat cured silicone optical material to permanently adhere the one or more at least partially cured silicone optics to the optical structure.

A dual-aperture zoom camera comprising a Wide camera with a respective Wide lens and a Tele camera with a respective Tele lens, the Wide and Tele cameras mounted directly on a single printed circuit board, wherein the Wide and Tele lenses have respective effective focal lengths EFL.sub.W and EFL.sub.T and respective total track lengths TTL.sub.W and TTL.sub.T and wherein TTL.sub.W/EFL.sub.W>1.1 and TTL.sub.T/EFL.sub.T<1.0. Optionally, the dual-aperture zoom camera may further comprise an optical OIS controller configured to provide a compensation lens movement according to a user-defined zoom factor (ZF) and a camera tilt (CT) through LMV=CT*EFL.sub.ZF, where EFL.sub.ZF is a zoom-factor dependent effective focal length.

Systems and methods for lens creations are disclosed. The method includes initiating light transmission from a light source through a diffuser into a container holding resin and a substrate. The light transmission is performed according to an irradiation pattern wherein each point in the resin is illuminated by at least 10% of the diffuser. This causes a lens to be formed. To achieve this illumination, at least 15% of the diffuser receives light from the light source. Further, a diameter of the diffuser is greater than or equal to a diameter of the substrate. The system performing the methods includes a polymerization apparatus and may include a resin conditioning and reservoir apparatus, a metrology unit, a resin drainage apparatus and an optional postcuring apparatus.

A lens includes an optical portion; and a rib portion extending to an external side of the optical portion in a radial direction and including a light transmitting region and a light-shielding region, wherein the light-shielding region includes an ester-based compound and a hydrocarbon-based compound, and wherein the hydrocarbon-based compound includes a saturated hydrocarbon compound.