599 results about "Wide beam" patented technology

An apparatus and method is characterized by providing an optical transfer function between a predetermined illuminated surface pattern, such as a street light pattern, and a predetermined energy distribution pattern of a light source, such as that from an LED. A lens is formed having a shape defined by the optical transfer function. The optical transfer function is derived by generating an energy distribution pattern using the predetermined energy distribution pattern of the light source. Then the projection of the energy distribution pattern onto the illuminated surface is generated. The projection is then compared to the predetermined illuminated surface pattern to determine if it acceptably matches. The process continues reiteratively until an acceptable match is achieved. Alternatively, the lens shape is numerically or analytically determined by a functional relationship between the shape and the predetermined illuminated surface pattern and predetermined energy distribution pattern of a light source as inputs.

A multi-lens LED has multiple lenses and an intermediate layer interposed between the multiple lenses in order to radiate light emitted from an LED chip in a desired direction and / or at a desired beam angle. The first lens is centered behind the LED chip when seen in the propagation direction of light. The second lens has a concave structure and surrounds the first lens. The intermediate layer is interposed between the first and second lenses, so that light emitted from the LED chip can be radiated at a wide beam angle. When provided in the form of a hemisphere, the multi-lens LED can be attached, e.g., to a wall or a ceiling for interior lighting. On the other hand, when provided in the form of a semicylinder, the multi-lens LEDs can be arranged in arrays to be used, e.g., as a light source of an LCD backlight apparatus.

A receiver receives an RF-band modulated signal transmitted from a transmitter, as well as an un-modulated carrier also transmitted from the transmitter and having a phase noise characteristic coherent with that of the modulated signal, and a product of the two components is generated to thereby restore an IF-band transmission source signal. In the receiver, a small planar antenna having a broad beam characteristic such as a single-element patch antenna is combined with an amplifier and a mixer circuit, which are formed on a micro planar circuit by an MMIC technique, so as to form a unit receiving circuit. A plurality of such unit receiving circuits are disposed on the receiver at intervals smaller than a wavelength corresponding to an IF band, and detection outputs from the unit receiving circuits are power-mixed. Thus, the receiver serves as a high-gain antenna having a detection function, and can realize a broad beam radiation characteristic comparable to that of a single-element antenna. The composed IF-band composite output is demodulated in an IF-band demodulation circuit. The present invention enables construction of a low-cost radio communication system, transmission of high-quality signals, and production of a wide beam antenna which has a high gain and which is convenient for use.

The invention discloses a multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam, which is applied in places with higher demands on the properties of the broadband and the circular polarization. The multimode satellite navigation terminal antenna is composed of an antenna body and a feed network, wherein, the antenna body consists of a radome (1), a media support, a metallic radiating patch (2), four L-shaped metallic feed probes (3) and a metallic reflecting plate (4); the feed network consists of a four-way microstrip power-dividing phase shift network (5) and a metallic shielding box; the four L-shaped metallic feed probes (3) of the antenna body are electrically connected with the microstrip power-dividing phase shift network (5) of the feed network by metals. The multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam leads the relative bandwidth of the microstrip antenna to reach a point above 40 percent. Meanwhile, since the microstrip antenna with nested media is adopted, the low-elevation gain of the microstrip antenna is greatly improved. With a 5-degree elevation angle gain larger than -5dBi, the multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam is also provided with excellent mechanical characteristics and temperature characteristics.

A sensor including at least one element made out of a radiation detection material, capable of emitting a luminescence radiation and transparent to this radiation, and two radiation filtration screens, one thin and placed opposite one end of the element, the other thick and placed at the periphery of the element. The sensor may be coupled with a flexible optical wave guide designed to collect and convey the luminescence radiation.