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Dual-wavelength large-magnification continuous zooming laser beam expander

A technology of laser beam expansion and large magnification, which is applied in the laser field, can solve the problems of inconvenient laser processing and affecting the efficiency of laser processing, and achieve the effects of avoiding backlight interference, improving flexibility and applicability, and improving efficiency and precision

Pending Publication Date: 2021-08-03
富通尼激光科技(东莞)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If a larger beam expansion ratio is required, only a fixed-magnification laser beam expander can be used, which brings inconvenience to laser processing and affects the efficiency of laser processing

Method used

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  • Dual-wavelength large-magnification continuous zooming laser beam expander
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  • Dual-wavelength large-magnification continuous zooming laser beam expander

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Embodiment Construction

[0040] 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.

[0041] see figure 1-5. In the embodiment of the present invention, a dual-wavelength large-magnification continuous variable magnification laser beam expander includes a first lens L1, a second lens L2, and a third lens arranged coaxially in sequence on the optical axis along the laser incident direction L3 and the fourth lens L4. Wherein, the first lens L1 and the second lens L2 are plano-concave negative lenses, and the concave surface of the first lens L1 ...

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Abstract

The invention discloses a dual-wavelength large-magnification continuous zooming laser beam expander. The beam expander comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially and coaxially arranged on an optical axis in the laser incidence direction; the first lens and the second lens are plano-concave negative lenses, and the concave surfaces of the first lens and the second lens face the laser incidence direction; and the third lens is a meniscus positive lens, and the fourth lens is a biconvex positive lens. The adjustable range of the beam expanding ratio is 20-40 times, the beam expanding capacity of the zooming beam expander is obviously higher than that of a zooming beam expander in the prior art, and according to the Rayleigh spot formula, the light spot size after laser focusing is further reduced, so the laser machining efficiency and precision are improved.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a dual-wavelength large-magnification continuously variable laser beam expander. Background technique [0002] Laser has been widely used in cutting, drilling, welding and other material processing fields due to its excellent monochromaticity, coherence, directionality and high brightness. In the process of laser processing, in order to increase the power / energy density of the laser beam to achieve high-efficiency material removal, it is generally necessary to focus the laser beam and place the focus near the area to be processed. According to the laser Rayleigh spot formula: δ=2.44λf / D, when the laser wavelength λ and the focal length f of the focusing mirror are constant, the diameter of the spot at the focal point is inversely proportional to the diameter of the incident spot on the object side of the focusing mirror. However, most lasers directly output a small spot diameter....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09
CPCG02B27/0955
Inventor 尹雨松刘学松王世波陶锐周晓海黄巧杨焕鹏刘明明
Owner 富通尼激光科技(东莞)有限公司
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