摘要:
Disclosed is a method of detecting relative positional deviation of a first object with a first grating pattern having an optical power and a second object with a second grating mark having an optical power. Light diffracted by both the first and second grating marks forms a light pattern on a predetermined plane; wherein different diffraction beams of the light diffracted by both the first and second grating marks are displaceable along the predetermined plane in accordance with the relative positional deviation of the first and second objects, in the same direction and by substantially the same quantity; and the relative positional deviation of the first and second objects is detected on the basis of the position of the light pattern on the predetermined plane.
摘要:
A method of detecting a relative positional deviation of a first object having a first grating mark with an optical power and a second object having a second grating mark with an optical power, is disclosed, wherein a projected radiation beam is diffracted by the first and second grating marks in sequence and, on the basis of a position of convergence on a light receiving surface of plural diffraction beams produced by the diffraction through the first and second grating marks and including a signal beam having been diffracted at a predetermined order by each of the first and second grating marks, the relative positional deviation is determined, a detection zone is defined on the light receiving surface, the signal beam is converged upon the detection zone, and a predetermined diffraction beam of the plural diffraction beams which, for a relative positional deviation of the first and second objects, shows displacement different from that of the signal beam is substantially prevented from being converged upon the detection zone.
摘要:
In a cavity body, a conductor rod is provided with least one end thereof being electrically connected to the cavity. A dielectric core is disposed in the cavity and the conductor rod extends through a hole in the dielectric core. With this structure, the cavity and the conductor rod constitute a resonator which operates in the quasi-TEM mode of a re-entrant cylindrical cavity resonator. The cavity and the dielectric core constitute a resonator which operates in the quasi-TM mode.
摘要:
The present invention provides a solution to a problem that a composition including a reactive silicon group-containing polyether undergoes red coloration. More specifically, in a reactive silicon group-containing organic polymer which contains Co, the problem concerned is solved by limiting the Co content to 0.5 ppm or less. As the reactive silicon group-containing organic polymer, for example, a reactive silicon group-containing polyether (A) or a mixture of the reactive silicon group-containing polyether (A) and a vinyl polymer (B) may be cited. The reactive silicon group-containing polyether (A) is obtained, for example, by reacting a polyether or a derivative thereof which contains Co in a content of 0.5 ppm or less with a silane compound which has a group capable of reacting with the polyether or the derivative thereof and has a hydrolyzable group.
摘要:
First and second transmission paths P1 and P2 are disposed between a first port #1 connected to an antenna ANT and a second port #2 connected to a transceiving circuit 10. The first transmission path P1 includes receiving filters Rx1, Rx2, and Rx2′, an amplification circuit LNA, and 90° hybrid circuits 12 and 14. The second transmission path P2 includes a transmitting filter Tx1. A received signal amplified by the amplification circuit LNA is transmitted to the port #2 via the 90° hybrid circuits 12 and 14, but is not transmitted to the second transmission path P2. A transmission signal is transmitted from the port #2 to the second transmission path P2. This prevents oscillation of the received signal due to positive feedback. A transceiving filter device that prevents degradation in the insertion loss, noise figure, and group delay characteristics in the transmission frequency band or the receiving frequency band and that prevents oscillation, and a communication apparatus using the transceiving filter device are provided.
摘要:
A dielectric filter that has attenuation poles on both the low frequency side and the high frequency side of its pass band, without using two dielectric resonators. The dielectric filter includes a cavity in which a conductive layer is formed, and a cross-shaped dielectric resonator disposed within the cavity, the dielectric resonator having at least three resonant modes, and coupling loops being coupled to the dielectric resonator. A coupling loop couples to a resonant mode at a first stage, among the resonant modes of the dielectric resonator, and also couples to resonant mode at a third stage in approximately negative-phase with respect to the first stage.
摘要:
A method of measuring dielectric material constants, which includes steps of forming a dielectric resonator by providing a plurality of coupling terminals for input and output of signals, on a shield case, with a dielectric sample being disposed within the shield case, constituting an oscillation circuit together with the dielectric resonator by connecting a positive feed-back circuit including an amplification circuit, between the signal output coupling means and the signal output coupling means, and measuring variation in an oscillation frequency of the oscillation circuit by heating the dielectric sample through injection of a high frequency power into the particular coupling terminal, so as to obtain a specific material constant of the dielectric sample based on the variation of the oscillation frequency, and, also a measuring device employed for effecting the measuring method.
摘要:
This invention relates to processes for producing an olefin-terminated polyester. In one of the processes which comprises reacting an olefin-terminated diester compound with a lactone in the presence of a polymerization catalyst with transesterification ability, the lactone is in a limited amount added to the reaction system. In another process which comprises reacting an olefin-terminated diester compound, a lactone compound, a cyclic acid anhydride and an epoxy compound in the presence of a polymerization catalyst with transesterification ability, the lactone, cyclic acid anhydride and epoxy compound are each in a limited amount added to the reaction system. In accordance with this invention, olefin-terminated polyesters having high terminal modification rates can be synthesized.
摘要:
A filter employing Triplate type microstripline as the base element comprises first and second dielectric substrates which are superposed with each other so as to hold a resin sheet therebetween, and are contained in a metal case. The respective dielectric substrates are provided on outer major surfaces with ground electrodes to be electrically connected with the metal case. Resonance electrodes are provided on inner major surfaces of the respective dielectric substrates to be electrically connected with relating ground electrodes through end surfaces of the dielectric substrates. The resin sheet holds metal pins passing through the same along the direction of thickness thereof, so that the respective resonance electrodes of the first and second dielectric substrates are electrically connected with each other by the metal pins.
摘要:
A variable focal length objective of which at least one of a pulrality of lens units is moved to vary the image magnification, wherein at least one of the plurality of lens units has at least one refractive index distribution type lens provided with a condition of N.sub.1 >0 as, taking the distance from the optical axis to a radial direction as h, the refractive index distribution is expressed by N(h)=N.sub.0 +N.sub.1 h.sup.2 +N.sub.2 h.sup.4 +N.sub.3 h.sup.6 +. . . (N.sub.0, N.sub.1, N.sub.2 . . . are constants), and satisfies the following conditions: ##EQU1## where fmax: the maximum focal length;fmin: the minimum focal length;Lmin: the optical total length when the total length is shortest;Y: the maximum image height;N.sub.1 *: the coefficient of h.sup.2 of the refractive index distribution type lens having a refractive index distribution of N.sub.1 >0;D*: the lens thickness of the refractive index distribution type lens having the refractive index distribution of N.sub.1 >0.