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F-theta optical lens

An optical lens and lens technology, applied in the direction of optics, optical components, instruments, etc., can solve the problems of affecting the focus of ultraviolet laser, the product is not fine enough, clear, etc., and achieve the effect of wide application, fine processing effect and high work efficiency

Active Publication Date: 2012-01-04
HANS LASER TECH IND GRP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide an f-theta optical lens for ultraviolet laser application, aiming to solve the problem that the existing lens affects the focus of ultraviolet laser and the processed products are not fine and clear enough

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[0025] The first lens L1 is composed of two curved surfaces S1 and S2 whose radii of curvature are R1=-30mm and R2=500mm respectively, the central thickness d1=2mm on the optical axis, and the material is Nd1:Vd1 is about 1.5 / 70; the second Lens L2 is composed of two curved surfaces S3 and S4 with curvature radii of R3=-65mm and R4=-50mm respectively, the central thickness d3=6mm on the optical axis, and the material is Nd3: Vd3 is about 1.6 / 41; the third lens L3 is composed of two curved surfaces S5 and S6 whose radii of curvature are R5=0mm and R6=-50mm, the center thickness d5=12mm on the optical axis, and the material is Nd5:Vd5 is about 1.6 / 41; the fourth lens L4 is respectively It is composed of two curved surfaces S7 and S8 with curvature radii of R7=180mm and R8=-370mm, the central thickness d7=7mm on the optical axis, and the material is Nd5: Vd5 is about 1.6 / 41; the flat mirror L5 is composed of the curvature radius It is composed of two curved surfaces S9 and S10 of...

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Abstract

The invention relates to an f-theta optical lens of UV laser application. The f-theta optical lens comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially ranged in the incoming direction of light beams, wherein the first lens is a biconcave lens, the second lens is a meniscus lens with the curve surface bending towards the incoming direction of light rays, the third lens is a plane convex lens, and the fourth lens is a biconcave lens, wherein the optical lens is used for the processing region of UV laser with the lens viewing angle of 50 degrees, the focal length of 100 mm and the wavelength of 355 nm in the processing range of 60 mm*60 mm. The UV laser passing the lens of the invention has small focusing spots and concentrated energy, and can be usedfor marking or drawing on some processed special materials with superfine effects.

Description

【Technical field】 [0001] The invention relates to an f-theta optical lens for ultraviolet laser application. 【Background technique】 [0002] With the continuous development of laser processing, the types of media to be processed are increasing, and the processed effects are required to be more and more refined, especially for some special materials, which have different requirements for the wavelength of the laser. Some materials can no longer meet the processing requirements of these media with the laser wavelengths λ=1064nm and 532nm commonly used in the past; there are also some materials that can be processed by lasers with wavelengths of 1064nm and 532nm, but in order to achieve more fine and clear effects , or switch to short-wave ultraviolet laser processing, because its focusing spot is extremely small, as shown in the following formula: [0003] Rayleigh spot diameter δ=2.44λf / D [0004] It can be seen from the above formula that when using the same f / D optical le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/14G02B13/18
Inventor 李家英周朝明高云峰
Owner HANS LASER TECH IND GRP CO LTD
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