229 results about "Rectangular aperture" patented technology

A revolver having a frame that defines a rectangular aperture to which a cylinder is mounted, and a laser aiming device that is mounted to the frame, rearward of the rectangular aperture. The laser aiming device is secured to the frame by a fastener that is inserted through an opening defined in a central position of the laser aiming device and into a corresponding hole formed in the frame. The alignment axis of the laser aiming device is proximate the firing axis of the revolver. The laser aiming device is light weight and lies substantially flush against the revolver, between the frame and the cylinder.

Method and apparatus for processing a substrate with a beam of energetic particles. The beam is directed from a source through a rectangular aperture in a shield positioned between the source and substrate to a treatment zone in a plane of substrate movement. Features on the substrate are aligned parallel to a major dimension of the rectangular aperture and the substrate is moved orthogonally to the aperture's major dimension. The beam impinges the substrate through the aperture during movement. The substrate may be periodically rotated by approximately 180° to reorient the features relative to the major dimension of the rectangular aperture. The resulting treatment profile is symmetrical about the sides of the features oriented toward the major dimension of the rectangular aperture.

The present invention relates to an ultra-wideband (UWB) antenna, which comprises: a rectangular aperture portion, formed from a ground plane of a printed circuit board and having an aperture; and a co-plane feeding structure, having a horizontal portion and a vertical portion, wherein the vertical portion is perpendicular to the horizontal portion, and the vertical portion is disposed in the aperture and connected with an external terminal. The ultra-wideband (UWB) antenna of the present invention can receive the wireless signal with 3.1˜10.6 GHz band, and have a very compact area (13 mm×23 mm) and is easy to be mass produced. Furthermore, a parasitism element can be added into the co-plane feeding structure, so as to reject the in-band interferences from the existing systems like 5˜6 GHz signals of wireless LAN.

A variable rectangle-type electron beam exposure apparatus for forming rectangular beams of different angles which is capable of highly finely conducting exposure with respect to a predetermined fine line pattern having an arbitrary angle in the pattern region. The apparatus includes a first slit member (10) in which a plurality of rectangular apertures (11, 12) are respectively arranged by different angles; a second slit member (20) in which a plurality of rectangular apertures (21, 22) which are respectively positioned in parallel with the corresponding rectangular apertures of the first slit member, are arranged; and a deflecting unit (40) for deflecting an electron beam, which has been transmitted through a plurality of apertures of the first slit member, so that, when the electron beam transmitted through the first aperture of the first slit member is transmitted through the corresponding first aperture of the second slit member, the electron beam transmitted through the apertures except for the first aperture of the first slit can be intercepted by the second slit member.

An electron optical system has a plurality of electron lenses. The system includes a first electron optical system array having electrodes with a plurality of rectangular apertures, and a second electron optical system array having electrodes with a plurality of rectangular apertures. The first and second electron optical system arrays are arranged along an optical axis in which a long side of each aperture of the first electron optical system array is perpendicular to a long side of each aperture of the second electron optical system array.

The invention provides an etching device and an etching method for any apodised fiber bragg grating. The device comprises a laser, a rectangular aperture, a programmable spatial light modulator, a function generator, a cylindrical lens, phase mask fixtures and three-dimensional adjusting racks. The device has the advantages of simple structure, economy, practicality, high repeatability and high flexibility and is easy to realize; and the limitations in a traditional apodised fiber bragg grating manufacturing process that a high coherent light source needs to be used or two conjugated amplitude templates need to be processed, and only a single apodised fiber bragg grating can be manufactured are overcome.

The present invention discloses a voice control based point-and-read watch, comprising a watch body and a watch band. The present invention further discloses a point-and-read method applied to the voice control based point-and-read watch, wherein the method comprises the following steps: (1) sending, by a user, a voice control command and performing a point-and-read operation; (2) moving, by the user, the watch to enable an aperture to surround content that needs point-and-read; (3) performing, by an image processing module, intelligent identification on an area surrounded by the rectangular aperture, to generate a text; (4) performing, by a voice processing module, TTS voice synthesis according to the text, playing corresponding point-and-read content; and (5) performing, by the user, a further operation on the point-and-read content. The present invention has the advantages of meeting a requirement of the user for any book, and enabling the user to perform a point-and-read operation more conveniently during the study.

A technique for shaping a ribbon-shaped ion beam is disclosed. In one particular exemplary embodiment, the technique may be realized as an apparatus for shaping a ribbon-shaped ion beam. The apparatus may comprise an electrostatic lens having a substantially rectangular aperture for a ribbon-shaped ion beam to pass through, wherein a plurality of focusing elements are positioned along short edges of the aperture, and wherein each focusing element is separately biased and oriented to shape the ribbon-shaped ion beam.

A radio antenna arrangement disposed in the conductive surface of a vehicle consisting of a substantially rectangular aperture having aperture length L and width B, wherein said aperture length L is sufficiently small so that the self-resonant frequency of the aperture is greater than the center frequency of the operating frequency range. There is a capacitive tuning element disposed in the aperture for tuning the aperture to a resonant frequency to approximately the center frequency of the operating frequency range. The capacitive tuning element serves as capacitive connection between the edges of the aperture, and is formed as a low-inductance element, so that due to the residual inductive effect, the remaining magnetic reactive power is as small as possible relative to the magnetically generated reactive power from the magnetic fields in the aperture. An input coupling element is also disposed in the aperture for coupling the antenna connection point to the resonance like high electromagnetic fields.

The invention relates to a device capable of generating uniform linear laser beams based on high-numerical aperture cylindrical lens focusing. The device is composed of a linear polarization laser light source, a spherical lens assembly, a rectangular aperture, a 1/2 wave plate, a discontinuous wave plate and a high-numerical aperture cylindrical lens. Light beams generated by the linear polarization laser light source are subjected to beam expansion and collimation which are performed by the spherical lens assembly, and then, rectangular linearly polarized light which is almost uniform and is arranged at the center of a light spot selectively passes through the rectangular aperture; the rectangular linearly polarized light emitted by the rectangular aperture passes through the 1/2 wave plate, and then, passes through or does not pass through the discontinuous wave plate; and after that, the rectangular linearly polarized light is focused by the high-numerical aperture cylindrical lens, and the uniform linear laser beams are generated at a focal plane. With the device which is of structural simplicity adopted, under the situations that the discontinuous wave plate is used or not used, the uniform linear laser beams of which the center is flat-topped can be obtained at the focal plane through simply rotating the 1/2 wave plate and changing the numerical aperture of the high-numerical aperture cylindrical lens, wherein the uniform linear laser beams can be used for linear scanning microscopic imaging, and micro-nano materials processing and detection.

A combination device for insulating a beverage vessel and removing a bottle cap is disclosed. This device includes a generally cylindrically-shaped insulating sleeve, a substantially planar and disk-shaped metal insert with a rectangular aperture that pries off a bottle cap, and a ring-shaped structure that stabilizes the insert within the insulating sleeve.

A protective hanger apparatus for use with fence posts includes an elongated substantially rectangular flexible main body, wherein the main body defines or engages with a top loop having dimensions enabling it to fit over the top of and be supported from a fence post. The main body further includes least two lateral rectangular apertures in this main body having a predetermined height and width such as to be removably engageable with at least one included item hanger.

The invention discloses a compact rectangular aperture configuration structure and a sampling method of a target space frequency. In the invention, a compact rectangular aperture configuration mode isadopted; a rectangular aperture is divided into four square matrixes; an aperture in each square matrix carries out central symmetry pairing so as to realize spatial-frequency continuous integer coverage sampling in one space frequency range; and through inverse Fourier transform, a target image is acquired. Through the aperture configuration mode, full collection in one continuous space frequency range can be realized, continuous and non-redundant space frequency coverage is acquired, and imaging quality of a target is increased.

The invention discloses a filter box capable of adjusting filtration stage number and precision, which comprises a box body (1) and a filter plate (2), a filter screen (23) is arranged on the filter plate (2), the filter box comprises one or more filter plates (2), the corresponding positions of a front panel (11) and a rear panel (12) of the box body are provided with one or more rectangular apertures (15), the size of the rectangular aperture (15) is matched with size of the filter plate (2). The invention uses the multistage filter plate (2) capable of changing, the users can install the filter plates (2) with different numbers according to the requirement, so that the different filtration precision is achieved, the filter box capable of adjusting filtration stage number and precision has strong adaptability in the workplace environment.