A Tamm electromagnetic cavity (10, 20, 30, 40, 60) possessing a resonant frequency in the THz domain, comprising: an interference mirror that is reflective in the THz domain, this mirror consisting of a stack of dielectric layers (7) comprising an alternation, in a z-direction, of two different layers, a layer referred to as the layer of high refractive index (2) and a layer referred to as the layer of low refractive index (4), the index of the layer of low refraction being lower than that of the layer of high refractive index, and being manufactured by stacking layers mechanically or by joining dielectric layers to one another; an upper metal layer (5) deposited on or added to an upper dielectric layer of said interference mirror so as to form a structure that supports at least one Tamm mode in the THz domain, the upper metal layer (5) being structured so as to form an antenna possessing a resonant frequency equal to that of the electromagnetic cavity.

A multi-focal optical device comprises an image output unit outputting optical information, a linear polarizer uni-directionally polarizing the optical information, a first light reflector including a first polarizer transmitting light only in a first direction and reflecting the light transmitted through the first polarizer, a second light reflector including a second polarizer transmitting light only in a second direction perpendicular to the first direction and reflecting the light transmitted through the second polarizer, a light splitter splitting the optical information transmitted through the linear polarizer into the first light reflector and the second light reflector and reflecting the optical information reflected by one of the first light reflector or the second light reflector to allow the reflected optical information to form one focus, and a controller configured to control the linear polarizer to vary a direction of polarization of the linear polarizer.

The present application provides a safe and unbreakable PET film mirror and a preparation method thereof. The PET film mirror includes: a PET mirror surface; an aluminum alloy mirror frame disposed beneath the PET mirror surface; and an adhesive layer coated on a surface of the aluminum alloy mirror frame in contact with the PET mirror surface. The PET mirror surface includes: a PET-based film layer; a metal electroplated layer and an anti-oxidation coating, sequentially disposed on a back surface of the PET-based film layer; and a scratch-resistant resin layer disposed on a front surface of the PET-based film layer. The mirror according to the present application is light in weight, unbroken and highly safe. Even if damaged, it will not cause personal injury. In addition, the preparation method according to the present application has a simple process, occupies a small area, consumes few energy, and causes no pollution and damage to the environment.

A stretchable reflective color-shifting film comprises a stretchable transparent polymer layer; a semi-transmissive metal layer; a transparent spacer layer; a reflective metal layer; an adhesive layer; and a stretchable base film layer. When the film body is stretched by 25%, the peak total reflectance stretched is at 80% of the peak total reflectance when the film body is unstretched according to the Total Reflectivity Test.

The present invention provides a mirror having excellent weatherproof properties that suffers little deterioration of the reflective layer even when, for example, the mirror is used outdoors for a long time. The present invention provides a weatherproof mirror wherein a substrate, a reflective layer, and a sealing resin layer are disposed in that order. The substrate is made of a transparent plastic plate; the reflective layer is a metal layer; and the sealing resin layer exhibits flexibility and self-adhesive property at room temperature and constitutes a continuous phase. In a preferable aspect, the substrate has a plurality of micro grooves with V-shaped cross-sections and thus has a Fresnel lens structure.

A polyester resin composition contains a polyester resin A containing 70 to 100 mass % of a polybutylene terephthalate resin and 0 to 30 mass % of a polyethylene terephthalate resin. The polyester resin composition further contains a metal organic acid salt B, which is either or both of an alkali metal organic acid salt and an alkaline earth metal organic acid salt, and a predetermined amount of a styrenic resin C. The polyester resin composition contains a predetermined amount of either or both of an alkali metal atom and an alkaline earth metal atom relative to 100 parts by mass of the polyester resin A. In the polyester resin composition, the amount of linear oligomers of polybutylene terephthalate or the amount of the linear oligomers of polybutylene terephthalate and linear oligomers of polyethylene terephthalate is less than or equal to 1000 mg/kg.

A method is for making an optical detector device. The method may include forming a reflector layer carried by a substrate, forming a first dielectric layer over the reflector layer, and forming a graphene layer over the first dielectric layer and having a perforated pattern therein.

The invention relates to an infrared reflecting film comprising a flexible polymer substrate; a heat-mirror stack on the substrate, said heat-mirror stack comprising a first dielectric oxide layer, a second dielectric oxide layer and a silver-containing layer between the first and second dielectric oxide layers; and an optical stack on the heat mirror stack, said optical stack comprising alternating layers of at least one layer of a first type and at least one layer of a second type, wherein each layer of the first type has a refractive index measured at 550 nm of 1.6 or less and each layer of the second type has a refractive index measured at 550 nm of 2.3 or more.

A multi-focal optical device comprises an image output unit outputting optical information, a linear polarizer uni-directionally polarizing the optical information, a first light reflector including a first polarizer transmitting light only in a first direction and reflecting the light transmitted through the first polarizer, a second light reflector including a second polarizer transmitting light only in a second direction perpendicular to the first direction and reflecting the light transmitted through the second polarizer, a light splitter splitting the optical information transmitted through the linear polarizer into the first light reflector and the second light reflector and reflecting the optical information reflected by one of the first light reflector or the second light reflector to allow the reflected optical information to form one focus, and a controller configured to control the linear polarizer to vary a direction of polarization of the linear polarizer.

This invention relates to an ophthalmic lens comprising a multilayered interferential coating and to a manufacturing method thereof.

The ophthalmic lens comprises: an organic substrate having a front main face and a rear main face, and a multilayered interferential coating (30) which is coated on at least one of the front main face and the rear main face,

According to the invention, the multilayered interferential coating (30) comprises at least one graphene layer (2) which has a uniform thickness of between 0.1 nm to 1 nm.