摘要:
A semiconductor laser array with features providing good beam quality at high powers, first by employing a laterally unguided diffraction region in which light from a set of waveguides is re-imaged in accordance with the Talbot effect and two arrays of waveguides may be used to provide a spatial filtering effect to select a desired array mode. This provides a laser array with increased power per unit solid angle, and with additional advantages of ability to scale the device up to larger arrays, ability to control the electrical excitation of the device for better optimization, and improved modal discrimination. A second aspect of the invention is the use of a resonance condition in an antiguide array, to produce a uniform near-field intensity pattern and improved coupling and device coherence. This resonance structure may be combined with the Talbot-effect structure to suppress the out-of-phase mode, or the out-of-phase mode may be suppressed by other means, such as by introducing interelement radiation losses or absorption losses in the antiguide array.
摘要:
A semiconductor laser array of antiguides having a large number of antiguide elements to provide relatively high optical power output with a high degree of coherence and array mode discrimination. The antiguide elements are grouped into array cells that are separated by interarray regions having a width and refractive index selected to produce a resonance condition in the 0.degree.-phase-shift array mode. Each array cell is also designed to operate in the resonant condition, and losses in the interarray regions discriminate against modes other than the 0.degree.-phase-shift mode. The entire group of cells operates as a high-power, coherent ensemble, without the degradation of mode discrimination and beam quality usually associated with large numbers of waveguide elements.
摘要:
A system that determines a projector's true state in an automatic projection sequence. The system includes a projector in a primary display system, having a lamp for displaying visual information; and a sensor to determine the state of the lamp in the primary display system. Additionally, an interface to a secondary display system is included for sending an operational signal to the secondary display system, wherein the secondary display system operates subject to a predetermined state of the primary display system as determined by the state of the lamp in the primary display system.
摘要:
A light collector for use with a photodetector that provides uniform photodetector output response over a polar angular range regardless of the polar angle of incidence of light upon the collector is disclosed. The light collector comprises a generally spheroidally-shaped light direction changer having a light diffusing surface, and a generally spheroidally-shaped polar attenuator. The geometric center of the photosensitive surface of the photodetector is adjacent to the vertex of the generally spheroidally-shaped light direction changer.
摘要:
Karnal bunt of wheat is caused by Tilletia indica Mitra. Recently, teliospores morphologically resembling T. indica were isolated from bunted ryegrass seeds and wheat seed washes. Previously developed PCR assays failed to differentiate T. indica from the newly discovered ryegrass pathogen, T. walkeri. The nucleotide sequence of a 2.3-kb region of mitochondrial DNA, previously amplified by PCR only from T. indica, was determined for three isolates of T. indica and for three isolates of T. walkeri. There was greater than 99% identity within either the T. indica group or the T. walkeri group of isolates, whereas there was approximately 3% divergence between isolates of these two Tilletia species. Five sets of PCR primers were made specific to T. indica, and three sets were designed specifically for T. walkeri based upon nucleotide differences within the mtDNA region. In addition, a 212 bp amplicon was developed as a target sequence in a fluorogenic 5′ nuclease PCR assay using the TaqMan system for the detection and discrimination of T. indica and T. walkeri.
摘要翻译:小麦的Karnal b is是由Tilletia indica Mitra造成的。 最近,从from ed黑麦草种子和小麦种子洗涤中分离出形态上类似于indic,的eli豆。 以前开发的PCR测定法不能将T. indica与新发现的黑麦草病原体T. walkeri区分开来。 线粒体DNA的2.3-kb区域的核苷酸序列,先前仅通过PCR扩增,来自T. indica,测定了三种indic three分离株和三个分离的T. walkeri的分离株。 indic a a i i i i i i i。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。 基于t a特异性的5组PCR引物,基于mtDNA区域内的核苷酸差异,专门设计了3组。 此外,在荧光5'核酸酶PCR测定中,使用TaqMan系统发现212bp扩增子作为靶序列,用于检测和鉴别T. indica和T. walkeri。
摘要:
An improved device for stripping a wheel rim from a wheel rim expanding tooling apparatus (100) includes an inboard wheel rim expanding tooling assembly (102) including a plurality of segmented inboard wheel rim press members, an outboard wheel rim expanding tooling assembly (104) including a plurality of segmented outboard wheel rim press members, and at least one stripper pin device (120) installed in at least one of the segmented inboard wheel rim press members or the segmented outboard wheel rim press members. The at least one stripper pin device is installed in the at least one of the segmented inboard wheel rim press members or the segmented outboard wheel rim press members from the outer surface side thereof.
摘要:
An ignitor for a liquid propellant gun having a center electrode supportednd surrounded by insulation so that only a planar or domed face is exposed. The assembly is firmly seated in the bolt nose of the gun and several outer electrode configurations with little or no precombustion area are disclosed.
摘要:
This invention relates to an improved wheel rim rolling apparatus for use in producing a vehicle wheel rim. The wheel rim rolling apparatus includes a top roll assembly having upper rim tools adapted to engage a rim blank or a partially formed rim in order to impart a desired shape thereto, a moveable member and a non-moveable member. The upper rim tools are carried by the moveable member. A first position indicating member is attached to one of the moveable member and the non-moveable member of the top roll assembly. The first position indicating member is operative to generate a visual or readable output signal which is used for determining the position of the upper rim tools of the top roll assembly. A second position receiving member is attached to the other one of the moveable member and the non-moveable member of the top roll assembly. The second member is adapted to receive the visual or readable output signal from the first member to thereby indicate the position of the upper rim tools.
摘要:
An improved wheel rim expanding tooling apparatus includes an inboard and an outboard wheel rim expanding tooling assembly. The inboard wheel rim expanding tooling assembly includes a plurality of segmented inboard press members each including a pair of side surfaces. The side surfaces include a first outer section and a second inner section. The first outer section extends radially inwardly a first radial distance and the second inner section extends radially inwardly a second radial distance which is greater than the first radial distance. The first outer section of the inboard press members is provided with a generally curved surface profile which extends across at least a portion of an axial width thereof. The outboard wheel rim expanding tooling assembly includes a plurality of segmented outboard press members each including a pair of side surfaces. The side surfaces include a first outer section and a second inner section. The first outer section extends radially inwardly a first radial distance and the second inner section extends radially inwardly a second radial distance which is greater than the first radial distance. The first outer section of the outboard press members is provided with a generally curved surface profile which extends across at least a portion of an axial width thereof.
摘要:
The polymerase chain reaction (PCR) was used to identify Tilletia indica, the causal agent of Karnal bunt of wheat. The method uses two sets of oligonucleotide primers developed by sequence analysis of cloned Dra I fragments of mitochondrial DNA of T. indica. The primer pair TI17M1 (5'-TCCCCTTGGATCAGAACGTA-3') and TI17M2 (5'-AGAAGTCTAACTCCCCCCTCT-3'), derived from clone pTI-MD17, amplified a single 825-bp product from all isolates of T. indica and no products for other Tilletia species. In addition, the primer pair TI57M1 (5'-TTTTCCCTCTCTC-CTTTTTTCA-3') and TI57M2 (5'-AGCAAAGACAAAGTAGGCTTCC-3'), derived from clone pTI-MD57, produced a product of 118 bp which was unique to T. indica.