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Femtosecond laser two-photon processing device

A processing device, femtosecond laser technology, applied in the direction of optics, optical components, instruments, etc., can solve the problems of commercial production, complex and time-consuming production process, waste, etc., to achieve high practicability, improve efficiency, and spatial structure simple effect

Active Publication Date: 2020-11-27
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Application Information

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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.

Method used

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  • Femtosecond laser two-photon processing device

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] The purpose of the present invention is to provide a femtosecond laser two-photon processing device, which can effectively process a three-dimensional helical chiral structure and form a twisted structure liquid crystal template with a periodic structure, thereby improving the efficiency and efficiency of the processing process of the twisted structure liquid crystal template. practicality.

[0044] In order to make the above objects, features and advan...

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Abstract

The invention relates to a femtosecond laser two-photon processing device which is used for processing and preparing a distorted structure liquid crystal template by taking a photosensitive material as a workpiece. A spatial light modulator loads a computed hologram of a three-dimensional spiral structure. A half-wave plate is arranged on an emergent light path of a femtosecond laser; a diaphragmis arranged on an emergent light path of the half-wave plate; a prism is arranged on an emergent light path of the diaphragm; a beam expanding system is arranged on an emergent light path of the prism; a reflecting mirror is arranged on an emergent light path of the beam expanding system; the spatial light modulator is arranged on an emergent light path of the reflecting mirror; a second half-waveplate is arranged on an emergent light path of the spatial light modulator; a linear optical processing system is arranged on an emergent light path of the second half-wave plate; a microscope systemis arranged on an emergent light path of the linear optical processing system; a piezoelectric table is arranged on an emergent light path of the microscope system; and the photosensitive material isplaced on the piezoelectric table. The device is simple in space structure and extremely high in practicability, and the efficiency of preparing the distorted structure liquid crystal template is improved.

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...

Claims

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Application Information

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IPC IPC(8): G02B27/09
CPCG02B27/09
Inventor 陆建钢张鸿州
Owner SHANGHAI JIAO TONG UNIV
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