65results about How to "Fine aperture" patented technology

A lighting apparatus comprising a support, a light source having an emission surface and disposed in the support, a lens disposed to face the emission surface of the light source, and a half-mirror film provided on at least a surface of the lens, the half-mirror film being a thin film comprising a metallic material such as aluminum, the lens being a light-focusing lens, the lens having a peripheral part and a central part, the peripheral part including a lens surface comprising a smoothly curved surface, and the central part including a Fresnel lens surface.

An inline type speckle multiplexed hologram recording apparatus and method is disclosed which can condense signal light and reference light in a sufficiently overlapping relationship with each other on a hologram recording medium without using a lens having a large aperture and a wide angle of view. A signal light region and a reference light region are displayed on a spatial light modulator, and laser light is intensity modulated with recording data displayed in the signal light region to produce signal light while the laser light having passed through the reference light region is used as reference light. The signal light and the reference light are diffused by a diffuser and then condensed in an overlapping relationship with each other on a hologram recording medium by a lens such that interference fringes produced thereby are recorded in the hologram recording medium.

The invention discloses a microporous lightweight silica brick and a preparation method thereof, the lightweight silica brick is mainly prepared from a mixture and a foaming agent, and the dosage of the foaming agent is 0.1-10% of the mass of the mixture; the mixture is prepared from the following components in percentage by mass: 70%-95% of a siliceous material, 1%-25% of an inorganic cementing material, 0.1%-15% of a mineralizing agent and 0.1%-5% of an additive; wherein the siliceous material is composed of siliceous particles and siliceous fine powder, the particle size of the siliceous particles is 0.1-3 mm, the particle size of the siliceous fine powder is smaller than or equal to 0.075 mm, and the mass ratio of the siliceous particles to the siliceous fine powder is (1-65): (35-99). The obtained microporous lightweight silica brick product has the advantages of fine aperture, small density, low thermal conductivity, high porosity, high mechanical strength, good high-temperature volume stability, strong acid atmosphere and slag erosion resistance and the like, is low in preparation cost and good in heat insulation effect, meets harsh high-temperature environment and heat insulation requirements of thermal equipment, and is suitable for popularization and application.

An angle-resolving radar sensor, e.g., for motor vehicles, includes; an antenna having multiple antenna elements which are each switchable to one of multiple evaluation channels; and an evaluation device for determining the angle of incidence of a received signal based on the amplitudes measured in the evaluation channels. The number of antenna elements is greater than the number of evaluation channels and a switching device is provided to connect the evaluation channels alternatingly to different selections of antenna elements.