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3 results about "Quasicrystal" patented technology
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A quasiperiodic crystal, or quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks translational symmetry. While crystals, according to the classical crystallographic restriction theorem, can possess only two-, three-, four-, and six-fold rotational symmetries, the Bragg diffraction pattern of quasicrystals shows sharp peaks with other symmetry orders — for instance, five-fold.
Method for producing composite, composite and use
The present invention relates to a composite comprises a first binder (B1) and a first particle component (C1) comprising quasicrystal; and the composite comprises particles having an elongated form. The invention further relates to a method for producing a composite and use.
Owner:HELANDER HLDG OY
Device and method for detecting optical axis direction of crystal
PendingCN121540392AInvestigating crystalsGeometric properties/aberration measurementOptical axisQuasicrystal
The invention discloses a device and method for detecting the optical axis direction of a crystal, and the method comprises the steps: enabling a standard crystal with the known optical axis direction to be positioned and installed on a standard crystal positioning tool according to a selected direction, and enabling a to-be-detected crystal to be positioned and installed on an optical element positioning tool; the overlook vision camera records a cross wire image formed by two parallel straight lines and a straight line perpendicular to the two straight lines and appearing on the to-be-detected crystal. The optical axis direction of the to-be-detected crystal can be accurately determined by overlooking the change of the two parallel straight lines of the cross wire image recorded by the visual camera, and the method is extremely simple and effective, so that the crystal can be effectively prevented from being loaded into a crystal frame in a wrong direction, the subsequent assembly process is effectively prevented from being carried out on the basis of errors, and the production efficiency is improved. Waste of manpower and material resources is avoided; moreover, by adopting the device and the method for detecting the optical axis direction of the crystal, electric automatic control can be very easily realized, so that automatic detection of the optical axis direction of the crystal is realized, and the detection efficiency is greatly improved.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS +1
oscillator
An oscillator capable of preventing a delay in correction of frequency temperature characteristics by measuring an ambient temperature before a temperature of a crystal vibration plate is changed and capable of reducing hysteresis of the frequency temperature characteristics.A surface-mount type oscillator provided with an ambient temperature measuring sensor 15 that measures a temperature for correcting frequency temperature characteristics, on a substrate 1 on which a plurality of circuits are mounted, in which the ambient temperature measuring sensor 15 is disposed closer to a metal cover 2 than a reference crystal oscillator 11 including a crystal vibration plate and other circuits, and measures a temperature via a copper foil 16 for thermal conduction that is soldered to the metal cover 2 by the soldered portion 17, and the measured temperature is used for correcting the frequency temperature characteristics.
Owner:NIHON DEMPA KOYGO CO LTD