46 results about "Rotational wave" patented technology

A rotation device includes a rotation member, rotation driving source, transmission mechanism, rotation pulse generation mechanism, target value arrangement mechanism, correction value computation mechanism, and control mechanism. The transmission mechanism decreases the rotation speed at a non-integer gear ratio. The target value arrangement mechanism includes a rotation unevenness provision mechanism to impart a plurality of kinds of sine-wave unevenness to the rotation speed target value. The correction value computation mechanism determines the correction value to adjust rotation fluctuation caused by a rotation axis eccentricity component of the rotation driving source and at least one noise component having a cycle relationship with a rotation cycle of the rotation member based on a time interval of a pulse train generated every rotation of the rotation member by the rotation pulse generation mechanism when the plurality of kinds of the rotation unevenness are imparted to the rotation speed target value.

A rotational wave nozzle. A self-rotating type rotational wave nozzle that prevents the number of rotations from being higher than necessary. In the rotational wave nozzle, a rotary cylinder is supported by two bearings provided separately in an axial direction inside a fixed housing such that the rotary cylinder is freely rotatable. A spray nozzle is connected to the rotary cylinder, and the rotary cylinder is self-rotated through inclinedly ejecting compressed air supplied to a hollow section of the rotary cylinder relative to a surface of a disc. An annular member is provided to the rotarycylinder, movable attraction members being movable in a radial direction and being urged inward in the radial direction by a biasing member are installed at an outer periphery of the annular member, and fixed attraction members are installed on an inner wall of a protective cover and arranged in a circumferential direction so as to face the mobile attraction member. As the number of rotations of the rotary cylinder increases, the mobile attraction members approaching the fixed attraction members increase the mutual attractive force, and the number of rotations of the rotary cylinder decreasesand therefore does not exceed the prescribed number of rotations.

A lithography pupil shaping optical system and method for generating off-axis illumination mode. The invention is composed of illumination mode generation unit, rotatable wave plate, polarization beam splitter unit, ring I generation unit and ring II generation unit. Through selecting corresponding diffractive optical element and appropriate adjustment, this invention can generate various illumination modes including single ring illumination mode and double ring illumination mode. The intensity at pupil plane and the inner and outer diameters of the off-axis illumination mode can be adjusted continuously.

A system for extracting long wavelength ocean wave energy and for extracting rotational wave energy uses a plurality of boom elements connected to at least one hinge element for movement about the hinge element in a direction of the vertical force of a wave and for movement about the hinge element in a direction of the transverse force of a wave, and the hinge element includes a shaft transverse to the boom elements with a blade mounted to the shaft for rotational movement of the shaft in the direction of the rotational force of a wave.

The present invention discloses an alignment method for the optical axis of a compound wave plate and a device for the same. Two wafers of a compound wave plate to be aligned are arranged on a bracket, and then are mounted on a fixed wave plate chuck and a rotary wave plate chuck respectively; light emitted from a light source forms linearly polarized light after passing through a polarizer; after passing through the compound wave plate to be aligned, the linearly polarized light become changed in the polarization state; according to the intensity signal of transmitted beam detected by a detector, the variation amplitude of the phase delay fluctuation quantity of the compound wave plate to be aligned can be obtained further; the relative magnitude of the variation amplitude of the phase delay fluctuation quantity is compared; and the rotary wave plate chuck is controlled to rotate through an electric control rotary table until the optical axis of the compound wave plate is aligned to be in the required precision range. The device comprises the light source, the polarizer, the fixed wave plate chuck, the rotary wave plate chuck, a rotary polarization analyzer, the detector, the electric control rotary table, a computer, a stepping motor and an electric control rotary table controller. The method can align the optical axis of a compound wave plate with high precision, the device is simply equipped, and the operation is simple.

The invention discloses a clamping device for aligning the optical axis of a composite wave plate. The device includes an electronically controlled rotary table, a fixed wave plate chuck and a rotating wave plate chuck; the wave plate bracket is installed on the electrically controlled rotating The fixed wave plate chuck is connected with the base of the electric control rotary table, and the rotating wave plate chuck is connected with the turntable of the electric control rotary table. When in use, install the wave plate holder with the chip on the fixed wave plate card plate and rotating wave plate chuck. The clamping device provided by the present invention can realize the clamping of each wafer forming the composite wave plate when the optical axis of the composite wave plate is aligned with high precision, and ensure high-precision and high-resolution relative rotation between different wafers. Compared with the existing wave plate fixture, the clamping device provided by the present invention can not only realize the clamping and precise positioning of the two wafers, but also enable the relative rotation between the two wafers with high precision and high resolution, which is more suitable for Alignment process for the optical axis of the complex wave plate.

A contact vibration detection device 100 is for detecting contact vibration resulting from the contact of a stopping part 13 with a rotating shaft 12. The contact vibration detection device 100 comprises a rotation waveform determination unit 101 for determining a rotation waveform for the rotating shaft 12 on the basis of the displacement of the rotating shaft 12 during rotation, a parameter variation detection unit 102 for detecting variation in parameters consisting of the root mean square and phase angle of the rotation waveform, and a contact vibration determination unit 103 for determining whether there has been contact vibration on the basis of whether there has been parameter variation.

An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values.

The invention discloses a method and a device for measuring a phase delay spectral characteristic of a wave plate, comprising a broadband light source; and continuously emergent light is received after passing through a multi-wavelength photoelectric detector through a collimator, a polarizer, two wave plates to be detected, a polarization analyzer and an optical splitter respectively, wherein the two wave plates to be detected are connected with a motor, data received by the multi-wavelength photoelectric detector are uploaded to a data acquisition card which transmits the data to a computer which is connected with the motor. The method disclosed by the invention can automatically measure the phase delay spectral characteristics of the two wave plates to be detected within a wide spectral range, not only can be used for measuring the phase delay spectral characteristics of two rotary wave plates in a rotating double-compensator type broad-spectrum ellipsometer so as to eliminate system errors caused by inaccurate calibration, but also can be used for directly calibrating the phase delay spectral characteristics of two unknown wave plates in practical production and research work, and besides, the measurement result is not influenced by the light source and the spectral characteristic of a detector.

The invention discloses a preparation process of a 90-degree ultra-thin rotating twisted waveguide, which includes the following steps: S101, pre-preparing a 90-degree rotating shape part 1 and a standard part matching the 90-degree rotating waveguide cavity; S103, preparing for assembly and soldered external part 2, wherein the external part 2 includes an assembly groove and a fixing slot for matching with the 90-degree rotating external part 1; S105, interference fitting the obtained 90-degree rotating external part 1 into the obtained The shape of the second middle. By pre-preparing the 90-degree rotating outer part 1 and the outer part, the 90-degree rotating outer part 1 is dissolved with acid and alkali solution after assembly, and the 90-degree rotating waveguide cavity is retained, and the 90-degree rotation is realized by electroplating, welding and cutting. The preparation of the ultra-thin twisted twisted waveguide not only has a simple process for processing finished products, but also has a high yield rate, and waste materials can be reused, which is beneficial to environmental protection. In addition, the finished product of the 90-degree ultrathin twisted twisted waveguide through the preparation process has excellent electrical properties.