46 results about "Rotational wave" patented technology

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.