A femtosecond laser two-photon processing device

Abstract

The invention relates to a femtosecond laser two-photon processing device, which is used for processing and preparing a twisted structure liquid crystal template with a photosensitive material as a workpiece, and a spatial light modulator loads a three-dimensional helical structure calculation hologram; the half-wave plate is arranged on the femtosecond laser On the outgoing light path of the half-wave plate, the diaphragm is set on the outgoing light path of the half-wave plate, the prism is set on the outgoing light path of the diaphragm, the beam expander system is set on the outgoing light path of the prism, and the reflector is set on the outgoing light path of the beam expander system. The spatial light modulator is set on the outgoing light path of the mirror, the second half-wave plate is set on the outgoing light path of the spatial light modulator, the linear optical processing system is set on the outgoing light path of the second half-wave plate, and the microscope system is set on the linear light path. On the exit light path of the optical processing system, the piezoelectric stage is arranged on the exit light path of the microscope system, and the photosensitive material is placed on the piezoelectric stage. The invention has simple spatial structure, high practicability, and improves the efficiency of preparing twisted structure liquid crystal template.

Description

technical field [0001] The invention relates to the field of twisted structure liquid crystal preparation, in particular to a femtosecond laser two-photon processing device. Background technique [0002] Twisted liquid crystals include blue phase liquid crystals, spherical phase liquid crystals and cholesteric phase liquid crystals. Blue-phase liquid crystals have sub-millisecond response time, no alignment treatment, optical isotropy without an external electric field, and a periodic three-dimensional helical structure in the visible light band. Spheroidal phase liquid crystals consist of three-dimensional twisted structures with defects in between. Spherical phase liquid crystals have the advantages of fast response speed, no need for alignment and wide viewing angle. [0003] Especially in the field of phase modulation and photonics, spherical phase liquid crystals play an irreplaceable role. Since the spherical phase liquid crystal and the blue phase liquid crystal ha...

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Problems solved by technology

However, this method has other problems such as complex and time-consuming production process, waste phenomenon caused by refilling liquid crystal, etc., and cannot be applied to large-scale commercial production.

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