Method for inducing periodic structure on surface of optical glass by picosecond laser

A periodic structure and optical glass technology, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problem that it is difficult to form uniform LIPSS on the surface of optical glass, and achieve the goal of reducing surface reflectivity and increasing transmittance Effect

Inactive Publication Date: 2020-05-19
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for picosecond laser-induced periodic structure on the surface of optical glass,

Method used

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  • Method for inducing periodic structure on surface of optical glass by picosecond laser
  • Method for inducing periodic structure on surface of optical glass by picosecond laser
  • Method for inducing periodic structure on surface of optical glass by picosecond laser

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Embodiment 1

[0026] This embodiment describes the technical scheme of the present invention in detail by taking the etching process of the LIPSS on the surface of K9 glass as an example, as figure 1 shown.

[0027] (1) A K9 glass substrate with a diameter of 2.5cm, a thickness of 2mm, and double-sided polishing is used.

[0028] (2) A linearly polarized laser with a wavelength of 532nm and a pulse width of 8ps is selected as the light source. The laser is incident from the surface of K9 glass and focused on the surface of the material.

[0029] (3) Use a 150mm focal length lens to focus the laser beam so that the laser focus is located on the K9 glass surface, and the spot diameter is 32.5 μm.

[0030] (4) The energy density range of the spot is 4.72J / cm 2 to 13.27J / cm 2 .

[0031] (5) Through the action of 1-20 pulsed lasers, LIPSS with a period between 480nm and 510nm will be generated on the surface (incident surface) of K9 glass. As the number of pulses increases, the depth of LIPS...

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Abstract

The invention discloses a method for inducing a periodic structure on the surface of optical glass by picosecond laser. The method specifically comprises the following steps: a picosecond laser beam is focused on the surface of the optical glass through a beam expanding and focusing device, after 1-20 pulses act, LIPSS is formed on the surface, and the energy density range of the single laser is 0.4-0.9 times of the ablation threshold. The optical characteristics of the glass can be changed, the surface reflectivity is reduced and the transmittance is improved.

Description

technical field [0001] The invention belongs to the preparation technology of the periodic structure on the surface of optical glass, in particular to a method for inducing the periodic structure on the surface of optical glass by picosecond laser. Background technique [0002] Laser-induced periodic surface structure (LIPSS) is a fast, precise, and low-cost method for fabricating surface micro / nanostructures. From the perspective of application, LIPSS has potential applications in surface engineering and surface treatment, and has broad application prospects in the fields of optics, biology, electronics, medical treatment, and materials science. Traditional surface micro-nano structuring requires the support of advanced surface processing technology. There are two basic methods for forming micro-nano structures on the surface of materials: one is based on the removal method, which removes a certain structure on the surface of the material and leaves the target structure. T...

Claims

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Application Information

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IPC IPC(8): B23K26/0622B23K26/064B23K26/352B23K26/70
CPCB23K26/0648B23K26/0622B23K26/352B23K26/702
Inventor 于彩芸韩冰马丁·伊尔哈特高语璠朱日宏
Owner NANJING UNIV OF SCI & TECH
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