109results about How to "Avoid diffraction" patented technology

An audio system, an audio outputting method, and a speaker apparatus are disclosed. The audio system includes a plurality of speaker modules connected to each other, a detection module configured to detect information of the plurality of speaker modules and user information, and a home control module configured to receive an audio signal, process the received audio signal based on the information of the plurality of speaker modules and the user information, and transmit the processed audio signal to the plurality of speaker modules.

An acoustic generator, comprising: a source of electro-magnetic radiation; a waveguide coupled to said source; and at least one absorbing region defined in said waveguide, said region being selectively absorbing for portions of said radiation meeting at least one certain criterion and having significantly different absorbing characteristics for radiation not meeting said criterion, both of said radiation portions being suitable for conveyance through said waveguide, wherein said absorbing region converts said radiation into an ultrasonic acoustic field. Optionally, said region comprises a volumetric absorber. Alternatively or additionally, said region comprises a plurality of regions.

The invention provides a display panel and a display device, and relates to the technical field of display. The display panel comprises a display area, wherein the display area comprises a first display area and a light sensing element arranging area, and the light sensing element arranging area comprises a light transmission area and a shading area; and an underlying substrate and a plurality ofpixel units located on the underlying substrate, wherein the shading area comprises at least one pixel unit, and each pixel unit comprises a plurality of sub-pixels, and in the direction perpendicularto the plane where the underlying substrate is located, the shading area at least comprises one first outwards-protruding arc-shaped edge. According to the display panel and the display device, the diffraction phenomenon of the light sensing element arranging area can be reduced.

The invention relates to an evaporation deposition film mask plate, a manufacturing method thereof, an electromagnetic evaporation deposition device and an evaporation deposition method. The problem that in an existing electromagnetic evaporation deposition device, due to the effect of gravity, the middle position of an evaporation deposition film mask plate sags more, an evaporation deposition material is liable to diffract at a gap is solved. The evaporation deposition film mask plate comprises a film mask plate main body and a plurality of openings formed in the film mask plate main body. Each opening serves as an evaporation deposition area, and the other parts of the film mask plate main body except the openings serve as a shielding area. A first groove is formed in the shielding area and filled with a magnetic material, and the magnetism of the magnetic material is stronger than that of a film mask plate main body material. The first groove is formed in the evaporation deposition film mask plate main body and filled with the magnetic material with the stronger magnetism, so that the attracting force of an electromagnetic device in the electromagnetic evaporation deposition device to the evaporation deposition film mask plate can be increased, a gap between the evaporation deposition film mask plate and a base plate to be subjected to evaporation deposition can be reduced, and diffracting of the evaporation deposition material at the gap is avoided.

A sensor body 1 having a plurality of resonator beams 5 each resonating with a different specific frequency and a plate-like diaphragm 2 connected to the resonator beams and vibrating in response to sound waves is supported by a supporter 11. A cap 12 for acoustically separating one of the surfaces of the diaphragm 2 from the other surface is placed on the sensor body 1 to make the pressure difference between the sound pressure applied on one of the surfaces of the diaphragm 2 and the sound pressure applied on the other surface large in order to improve sensitivity.

An in-line skate wheel incorporating transverse-mounted and self-powered illuminating device is disclosed. The wheel includes two mutually coupled anchors, a rotor held between the two coupled anchors, multiple illuminating devices installed in transverse orientation on the rotor, a stator within the rotor but kept apart from the rotor, an axle extending through the two coupled anchors and the stator, and a protective covering placed around the rim of the first and second anchors. The transverse-mounted illuminating devices allow the skate wheel to be fitted on in-line skates and skate boards that can only use small wheels. Further, the present design can prevent scratching of the illuminating devices against the ground to avoid abrasion on the surface of the illuminating devices that would otherwise attenuate the light given out by the illuminating devices.

The quality of a planar image is improved while maintaining the parallax of a stereoscopic image. An image capturing device includes an imaging element that performs photoelectric conversion on respective light fluxes passing through different regions of a single pickup lens. The image capturing device includes a neutral density filter an AE control unit that acquires subject brightness, and a diaphragm control unit that, in a case of the stereoscopic pickup, controls whether or not to reduce the amount of light which reaches the imaging element using the neutral density filter based on the subject brightness, and that, in a case of the plane pickup, causes a diaphragm value of the diaphragm to be greater than a diaphragm value in the case of the stereoscopic pickup while setting the light extinction filter to a non-insertion state.

A monochromator to be used in an X-ray device having an X-ray source is formed by a crystal for spectral restriction of X-rays produced by the X-ray source. The monochromator includes a positioning device that can move the crystal so that it changes the spectral composition of the X-radiation. The crystal can be moved so that it changes the angle between an X-ray path and the crystal, or so that the crystal is removed out of X-ray path or returned into it.

The invention relates to a diffractive optical grating and applications thereof. The grating comprises a first zone and a second zone each having a two-dimensionally periodic grating structure having a first period (d_x) in a first direction, the first period being chosen to allow for diffraction of selected wavelengths of visible light along the first direction, and a second period (d_y) in a second direction different from the first direction, the second period (d_y) being short enough to prevent diffraction of said selected wavelengths along the second direction. According to the invention, the grating structures in the first zone and in the second zone have different modulation characteristics in said second direction for producing different diffraction efficiencies for the first and second zones. The invention provides a new design parameter, sub-wavelength modulation, for assisting in local adjustment of diffraction efficiency of gratings in particular in display applications.

The side-lighting light guiding board structure with micro lugs is used in the back light module of LCD or similar object. The micro lugs in the light guiding board has parabolic density distribution, that is, the micro lugs density distribution is dense near light source, gradually rarer and densest in the ultimate far position. The micro lugs are in micron level size and interval. The parabolic design can result in efficient homogeneous area light source.

The invention provides a portable gas monitor for monitoring volatile organic compounds by using differential optical absorption spectroscopy, comprising a heating sampling probe, a heating sample conveyer, a heating detecting gas chamber, a light source, a spectrometer, a GPRS (general packet radio service) positioning and data transmission unit, a flow metering and exhausting device, and a computer control system; the heating sample conveyer is connected with the heating sampling probe and the heating detecting gas chamber; light from the light source enters the heating detecting gas chamber and is reflected by a DOVE prism to enter the spectrometer; a mass flow meter of the flow metering and exhausting device is connected with an exhaust nozzle of the heating detecting gas chamber, and flow and on-off of a sampling pump are automatically controlled by the computer control unit; the computer control system uses received data to calculate characteristic signals of gas absorption by using differential difference technique to obtain gas concentration; the accuracy and sensitivity of detection results can be improved through DOVE prism reflection, gas concentration correction and differential difference technique.

Provided are a sound generation system and a sound recording system, which are placed in a room to adjust sound. A columnar body is disposed around a sound source to adjust how much sound of a low-tone range, as well as of a middle- and high-tone range, is absorbed and diffused. Moreover, a columnar body is disposed around a recording device to adjust how much sound of a low-tone range, as well as of a middle- and high-tone range, is absorbed and diffused. The columnar bodies may be made of a combination of different diameters and/or lengths. The arrangement distances may be random. With the columnar body disposed at the most appropriate location, it is possible to adjust sound in a wide band.

A coaxial speaker is provided. The speaker includes a bottom plate; a tweeter; a pole having a through-hole passing up/down at its upper and central part; and a tweeter fixing member fixed and connected at its one end to a bottom surface of the tweeter, and fixed and connected to an upper end of the bottom plate through the through-hole of the pole.

A hologram recorder (A) which records holograms by causing a recording beam (P) and a reference beam (S) to interfere with each other in a hologram recording media (B), includes an incident-side and an emitting-side lenses (3a, 3b) provided as a compound lens disposed in a laser beam path between a light source (1) and a beam separator (7); and an aperture stop (5) provided to limit a light flux diameter between the incident-side and emitting-side lenses (3a, 3b). The aperture stop (5) is disposed at a position biased toward the incident-side lens (3a) as viewed from an incident-side focal position of the emitting-side lens (3b).

The present invention discloses an ecological building which employs an insulation layer filed with an insulation chip made of at least one selected from a group of conifer leaves, rice straws, wheat straws, paper, and a processed product thereof instead of using a conventional inorganic insulation material like a petrochemical foam or mineral wool, and achieves an improvement in both charging and discharging of the insulation chip to be recycled, and an insulation structural body for the building, and a method for assembling the insulation structural body. The insulation structural body is characterized by including: a support member consisting of a plurality of pillar members each having an outer and an inner vertical pillar separated from each other with a given interval by means of a plurality of horizontal ribs alternately arranged on both sides thereof; outer panels joined to the outer vertical pillars of the pillar members of the support member so as to form the outside; inner panels joined to the inner vertical pillars of the pillar members of the support member so as to form the inside; insulation chips filling the space between the outer and the inner panel and the space between the outer and the inner vertical pillar; a discharging plate connected to a discharging opening formed in at least one of the outer panels so as to be opened and closed; and a charging plate connected to a charging opening formed in at least one of the inner panels so as to be opened and closed.

An organic light emitting display device includes a first substrate, a plurality of common lines, an optical member, and a second substrate. The first substrate includes a pixel region and a transparent region. The light emitting structure is disposed on the first substrate of the pixel region. The common lines are disposed adjacent to a boundary of the pixel region and the transparent region. The optical member prevents a light diffraction generated adjacent to the common lines. The second substrate is disposed on the light emitting structure and the optical member.

The invention discloses a micro-vibration long-distance real time image detecting system based on image surface digital holography. Received laser is divided into two beams of linear polarized light by a light split unit, and then the two beams of the linear polarized light are input in two spatial filters; one beam of the linear polarized light sequentially passes through a planoconvex lens and a reflector, and then the beam of the linear polarized light is seemed as reference light passes into a dispolarization splitting prism; the other beam of the linear polarized light sequentially passes through a planoconvex lens and a reflector and turns into illumination light. The illumination light irradiates the outer surface of an object which is to be detected, passes into the dispolarization splitting prism after scattering, and is output into an image collecting device through an imaging lens. Using a high-speed CMOS camera, digital hologram can be continuously shot at a high-speed. The detection range of the vibration frequency of the device can be improved, and multi-position micro-vibration long-distance real time detection in a certain area of the outer surface of the object can be achieved.

The present invention relates to a device for the vibration-reducing transmission of torques between two shaft sections in a shaft arrangement comprising two transmission parts that interact in a torque-transmitting manner in a coupling area, wherein each of the transmission parts has a protruding claw formation, which is received in a receiving area for the transmission of torque from the respectively other transmission part, wherein a damping device is provided between the transmission parts, wherein each of the transmission parts also has a closed bearing ring with a bearing opening, which receives and supports an axial positioning pin, and wherein the bearing ring is integrally connected to the associated claw formation of the respective transmission part and extends axially into the receiving area.