Laser tail lens assembly for selecting angular polarization

Abstract

The invention belongs to the technical field of optics, and particularly relates to a laser tail lens assembly for selecting angular polarization. The laser tail lens assembly for selecting angular polarization comprises an inner conical lens and an outer conical lens, wherein an incident hole is formed in the center of the inner conical lens, the outer conical lens is provided with an outer conical reflecting surface and an annular reflecting surface, an inner conical reflecting surface of the inner conical lens is opposite to the outer conical reflecting surface, the inner conical reflecting surface, the annular reflecting surface and the outer conical reflecting surface are connected in sequence to form a hollow multi-time-reflecting combined structure, and the conical angles of the inner conical reflecting surface and the outer conical reflecting surface are both 90 degrees. The laser tail lens assembly for selecting angular polarization is simple in structure, good in symmetry, high in maladjustment resistance, good in heat stability and mechanical performance, easy to manufacture, low in cost and capable of being widely applied to gas, solid and semiconductor lasers to generate high-power and high-purity angular polarization light.

Description

technical field [0001] The invention belongs to the field of optical technology, and in particular relates to a laser tail mirror assembly for selecting angular polarization. Background technique [0002] Angularly polarized light is a ring-shaped beam. The polarization direction of any point on the ring is perpendicular to the radial direction. The laser beam output by the laser can be processed to obtain angularly polarized light. Due to the special polarization vector structure of angularly polarized light, it has been applied in many fields. In the field of scientific research, angularly polarized light can be used to guide atoms. Under strong focusing, angularly polarized light can also be used as "optical tweezers" to capture particles. Angularly polarized light can also be used in two-photon fluorescence imaging to break through the diffraction limit and improve resolution. In the field of industrial processing, angularly polarized light can be used for drilling an...

AI Technical Summary

Problems solved by technology

However, since the production method of the birefringent crystal needs to cooperate with other technologies such as small hole mode selection, the stability of the implementation is poor, and the polarization purity of the obtained angularly polarized light is not high; the design and manufacture of the grating mirror is complicated and the price is relatively expensive.

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