Abstract:
Composite mirror systems include a wideband thin film interference stack having a plurality of microlayers and an optically thick layer having a refractive index greater than air but less than the smallest refractive index of the stack. The mirror systems can provide high reflectivity for light propagating in the stack and in the optically thick layer at supercritical angles, while avoiding degradation in reflectivity if dirt or other disturbances such as absorbing materials are present at the mirror backside for example due to contact with a support structure.
Abstract:
A sub-wavelength grating structure that has a very broad reflection spectrum and very high reflectivity comprising segments made of high refractive index material disposed on a layer of low refractive index material and a low refractive index material disposed above and between the segments. The index differential between the high and low index materials determines the bandwidth and modulation depth. The larger difference in refractive indices gives rise to wider reflection bands. The reflection is sensitive to parameters such as the grating period, the grating thickness, the duty cycle of the grating, the refractive index and the thickness of the low index layer underneath the grating. The design is scalable for different wavelengths, and facilitates monolithic integration of optoelectronic devices at a wide range of wavelengths from visible to far infrared. The sub-wavelength grating reflectors may be used in a variety of settings such as tunable etalon filters and as a replacement for conventional distributed Bragg reflectors.
Abstract:
A macroscopic mirror for wide angle scanning applications comprises: a silicon substrate section of a predetermined shape and macroscopic size cut from a silicon wafer comprising a flat, polished surface side and an etched, rough surface side; and a plurality of layers, including a layer of reflective medium, disposed on the flat, polished surface of the substrate section in such a manner to minimize flexural distortion of the flat surface. The macroscopic mirror is made by a method comprising the steps of: preparing the silicon wafer by polishing one side to a predetermined flatness and etching the other side to a predetermined roughness; cutting the substrate section from the prepared silicon wafer to a predetermined shape and macroscopic size; and applying the plurality of layers on the flat, polished surface. The macroscopic mirror is included in a mirror system wherein the rough surface side is bonded to supporting arms of a drive mechanism which scans the mirror at a predetermined scanning rate in at least one plane of rotation.
Abstract:
A multilayer mirror comprises a reflector section including a plurality of alternating layers of a high index material and a low index material, and a filter section over the reflector section. The filter section comprises a first filter layer including a low index material on a layer of high index material of the reflector section; a second filter layer on the first filter layer, the second filter layer comprising a high index material that is different than the high index material in the reflector section; and a third filter layer on the second filter layer, the third filter layer comprising a low index material. Each filter layer has an optical thickness greater than or equal to the optical thickness of each layer of the alternating layers. The filter section substantially blocks ultraviolet (UV) energy, thereby preventing UV energy from substantially impinging on the high index material of the reflector section.
Abstract:
Components of articles that include an optical element that imparts structural color to the component are provided. Methods of making the components including the optical element, and methods of using the components such as to make an article of manufacture are provided.
Abstract:
One or more aspects of the present disclosure are directed to bladders that incorporate a multi-layer optical film that impart a structural color to the bladder. The present disclosure is also directed to articles including the bladders having a multi-layer optical film, and methods for making articles and bladders having a multi-layer optical film.
Abstract:
The invention relates to an optical article, such as an ophthalmic lens, comprising a transparent substrate with a front main face and a rear main face, at least one of its main faces being coated with a multilayer interference coating, such as a mirror coating or an antireflective coating, which is the top coating of the article, wherein the outermost layer of the top coating comprises a material having antibacterial properties, or wherein the outermost layer of the top coating is a porous layer and the layer directly underneath the outermost layer of the top coating is a layer comprising a material having antibacterial properties.
Abstract:
The invention relates to a method for treating a mirrored optical item, comprising: a substrate (10), a mirroring stack (21) of at least two interference layers (M1 to M6) carried by the substrate (10), thus increasing the reflection and having: an interference layer (M1) distant from the substrate (10), with a first initial thickness and a first refractive index and at least one near interference layer (M2) arranged between the substrate (10) and the distant interference layer (M1), with a second thickness and a second refractive index different from the first refractive index, the mirroring stack (21) giving the mirrored optical ilem (1) a first colouring according to the CIELAB space, by means of an interferometry phenomenon, the method comprising a step (103) of removing, by ion bombardment, at least in one first predetemrined zone (Z1), a thickness of the mirrored stack that is less than the sum of the initial thicknesses concerned by the removal step, the mirrored optical item having, by means of an interferometry phenomenon, a second colouring according to the CIELAB space different from the first colouring.
Abstract:
One or more aspects of the present disclosure are directed to bladders that incorporate a multi-layer optical film that impart a structural color to the bladder. The present disclosure is also directed to articles including the bladders having a multi-layer optical film, and methods for making articles and bladders having a multi-layer optical film.
Abstract:
The light source device and the projection display apparatus include a solid-state light source unit, a dichroic mirror, a fluorescent plate, a first wave plate, and a multi-reflection mirror. The solid-state light source unit emits first and second linearly polarized light rays at a predetermined ratio, the first and the second linearly polarized light rays being orthogonal to each other. The dichroic mirror separates the first and the second linearly polarized light rays, and combines blue light with yellow light. The fluorescent plate emits the yellow light to the dichroic mirror when the fluorescent plate is excited by the first linearly polarized light ray separated by the dichroic mirror. The first wave plate converts the second linearly polarized light ray separated by the dichroic mirror, into circularly polarized light. The multi-reflection mirror reflects the circularly polarized light to the dichroic mirror as the blue light.