Optical lens

An optical lens and lens technology, applied in the field of optical lens, can solve the problems of insufficient fineness and clarity of the product, affecting the focus of ultraviolet laser, etc., achieve good three-dimensional sense and texture, improve energy concentration, and small focus point

Active Publication Date: 2010-10-20
HANS LASER TECH IND GRP CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0008] The purpose of the present invention is to provide an optical lens for ultraviolet laser application, which aims to solve the problem that the existing lens affects the focus of ultraviolet laser and the processed products are not fine and clear enough

Method used

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[0027] The first lens L1 is composed of two curved surfaces S1 and S2 whose radii of curvature are R1=-36mm and R2=270mm respectively, the central thickness d1=3mm on the optical axis, and the material is Nd1:Vd1 is 1.5 / 70; the second lens L2 is composed of two curved surfaces S3 and S4 with curvature radii of R3=-140mm and R4=-56mm respectively, the center thickness d3=6mm on the optical axis, and the material is Nd 3: Vd3=1.6 / 41; the third lens L3 It is composed of two curved surfaces S5 and S6 whose radii of curvature are R5=310mm and R6=-60mm, the center thickness d5=12mm on the optical axis, and the material is Nd5:Vd5=1.6 / 41; the first lens L1 and the second lens The distance between the lens L2 on the optical axis is d2=4mm, the distance between the second lens L2 and the third lens L3 on the optical axis is d4=0.1mm, and the distance between the third lens L3 and the first surface of the medium to be engraved is on the optical axis The spacing is d6=97-156mm, and the t...

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Abstract

The invention relates to an optical lens applying ultraviolet laser, which comprises a first lens, a second lens and a third lens sequentially lined in the incidence direction of a light beam; the first lens is a double-concave lens; the second lens is a meniscus-shaped lens, and the curved surface thereof bends towards the incidence direction of the light; the third lens is a double-convex lens; and wherein the optical lens is used for the ultraviolet laser with the focal length of 160mm and the wavelength of 355nm, and a processing area with the processing scope of 100*100*90mm<3> and the processing depth of 157 to 67mm. The optical lens can carry out plane or three-dimensional imaging marking on the surface of or inside a medium, so that carved points are finer, clearer, more uniform and do not deform, thereby not only improving the quality of internally carved products but also improving the working efficiency.

Description

【Technical field】 [0001] The invention relates to an optical lens for ultraviolet laser internal engraving application. 【Background technique】 [0002] Over the past few years, we have solved the use of various internal engraving optical lenses in various occasions. Now with the continuous development of laser engraving processing, the points that need to be engraved are more delicate and clear. The laser wavelength λ=532nm commonly used in the past can no longer meet the requirements of these processing. The newly developed UV fθ optical lens is developed for this processing requirement. Because this laser with a wavelength of λ=355nm can not only adapt to the amplification and absorption of some special media, but also because this short-wavelength laser has a smaller circle of confusion and higher resolution than 1064nm and 532nm, its principle The formula is as follows: [0003] Rayleigh spot diameter δ=2.44λf / D [0004] It can be seen from the above formula that whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18B44B1/00
Inventor 李家英周朝明高云峰
Owner HANS LASER TECH IND GRP CO LTD
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