WO2014067103A1 - 一种近红外激光聚焦镜头及激光印刷设备 - Google Patents
一种近红外激光聚焦镜头及激光印刷设备 Download PDFInfo
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- WO2014067103A1 WO2014067103A1 PCT/CN2012/083858 CN2012083858W WO2014067103A1 WO 2014067103 A1 WO2014067103 A1 WO 2014067103A1 CN 2012083858 W CN2012083858 W CN 2012083858W WO 2014067103 A1 WO2014067103 A1 WO 2014067103A1
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- Prior art keywords
- lens
- curved surface
- infrared laser
- focusing lens
- lenses
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- 238000007648 laser printing Methods 0.000 title claims abstract description 15
- 238000007639 printing Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000005499 meniscus Effects 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 11
- 239000011295 pitch Substances 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000004075 alteration Effects 0.000 abstract description 9
- 230000000007 visual effect Effects 0.000 abstract 2
- 238000012546 transfer Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
- B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/455—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using laser arrays, the laser array being smaller than the medium to be recorded
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
Definitions
- the invention belongs to the field of optical technology, and in particular relates to a near-infrared laser focusing lens and a laser printing device.
- laser printing technology has been widely used in electronic typesetting, laser plate making and other fields, which greatly simplifies the printing technology.
- the digitalization of laser printing can realize long-distance plate making and printing, and accelerate the speed of news publishing. It also greatly saves cost and manpower investment, and the application of laser in the printing field has enabled the printing industry to develop rapidly.
- Laser printing technology has been realized, in addition to relying on the widespread use of fiber lasers, but also thanks to the continuous upgrading of optical focusing system parameters.
- Laser printing equipment has a focusing lens.
- the focusing lens needs to have a large relative aperture and field of view angle, and the working distance is required to be as long as possible.
- Most of the existing focusing lenses for laser printing use a microscope and focus on the ultraviolet laser. Although this microscope has a large relative aperture, its field of view is small, the working distance is short, the operation is inconvenient, affecting the focusing effect, thereby affecting the printing quality, the printing fineness and clarity are not ideal, and the color reproduction is not true. Therefore, there is a need to propose a new type of focus lens for laser printing.
- the invention provides a near-infrared laser focusing lens, which aims to solve the problem that the existing ultraviolet lens has a small relative aperture and a short working distance, resulting in poor focusing effect and affecting printing quality.
- a near-infrared laser focusing lens comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged coaxially in the transmission direction of the incident beam;
- the first lens is a plano-concave negative lens
- the second and third lenses are double convex positive lenses
- the fourth and fifth lenses are meniscus positive lenses
- the concave surface of the first lens is opposite to the second lens, and the intermediate portions of the fourth and fifth lenses are respectively protruded in a direction opposite to the transmission direction of the incident light beam.
- a laser printing apparatus comprising a fiber laser, a printing drum, and a focusing lens for focusing laser light emitted from the fiber laser onto the printing drum, wherein the focusing lens adopts the near-infrared laser focusing lens .
- the invention can form a clear image of near-infrared light, can effectively correct the geometric aberration of the lens, obtain a clear flat image field, and have a large relative aperture and field of view.
- the lens is a microscope objective that combines a large field of view, large relative aperture, long working distance and flat field.
- the printing apparatus using such a lens has high printing fineness and sharpness, and the color reproduction is more realistic, and the lens has a long working distance, which makes it more convenient to operate.
- FIG. 1 is a schematic structural view of a near-infrared laser focusing lens according to an embodiment of the present invention
- FIG. 2 is a geometric aberration diagram of a near-infrared laser focusing lens according to an embodiment of the present invention
- FIG. 3 is a schematic view showing a dispersion pattern of a near-infrared laser focusing lens according to an embodiment of the present invention
- FIG. 4 is a graph showing a transfer function M.T.F of a near-infrared laser focus lens according to an embodiment of the present invention
- FIG. 5 is a graph showing an optical transfer function O.T.F of a near-infrared laser focusing lens according to an embodiment of the present invention
- Figure 6 is a schematic view showing the structure of a laser printing apparatus according to an embodiment of the present invention.
- FIG 1 A schematic structural view of a near-infrared laser focusing lens according to an embodiment of the present invention is shown. For convenience of explanation, only parts related to the present embodiment are shown.
- the near-infrared laser focusing lens includes a first lens L1, a second lens L2, and a third lens which are sequentially disposed coaxially along a transmission direction of the incident beam.
- the first lens L1 is a plano-concave negative lens
- the incident surface is a plane
- the exit surface is a concave surface
- the concave surface is opposite to the second lens L2
- the third lens L3 is a double convex positive lens
- the incident surface and the exit surface are convex on both sides
- the fourth lens L4 and the fifth lens L5 It is a meniscus positive lens, and the curvature radius of the incident surface of the two lenses is smaller than the radius of curvature of the exit surface, that is, the fourth lens L4 and the fifth lens L5
- the middle portion of the opposite direction of the incident light beam is convex, that is, convex toward the object side.
- parameters such as surface curvature and lens thickness of each lens are optimally designed.
- the first lens L1 The first curved surface S1 and the second curved surface S2 have a radius of curvature of ⁇ , 25.5 mm
- the second lens L2 includes a third curved surface S3 and a fourth curved surface S4, respectively having a radius of curvature of 500 mm.
- the third lens L3 includes a fifth curved surface S5 and a sixth curved surface S6 having a radius of curvature of 200 mm and -100 mm, respectively; and the fourth lens L4 includes a seventh curved surface S7 And the eighth curved surface S8 has a radius of curvature of 40 mm and 130 mm, respectively; the fifth lens L5 includes a ninth curved surface S9 and a tenth curved surface S10, and the radius of curvature is 20 mm, respectively. 30mm .
- the negative sign in the above parameters means that the spherical center of the surface is in the object space, and the positive and negative signs are not considered as positive numbers, and the center of the spherical surface is located in the image space.
- the first to tenth curved surfaces are sequentially arranged along the laser light transmission direction, and the radius of curvature of each of the curved surfaces is not the only option, and both exist. 5% tolerance range.
- the center thickness D and the surface pitch d of the first to fifth lenses are further Special design is carried out.
- the center thicknesses D1, D2, D3, D4, and D5 of the first to fifth lenses are 3mm, 6mm, 5mm, 5mm, 4mm, respectively.
- the tolerance is 5%.
- the distance d1 between the second curved surface S2 of the first lens L1 and the third curved surface S3 of the second lens L2 on the optical axis is 20 mm; the second lens L2 The fourth curved surface S4 and the fifth curved surface S5 of the third lens L3 have a distance d2 of 70 mm on the optical axis; the distance between the sixth curved surface S6 and the seventh curved surface S7 on the optical axis is 0.2 mm.
- the eighth surface S8 and the ninth curved surface S9 have a pitch of 0.2 mm on the optical axis. The tolerance of each of the above surface pitches is 5%.
- the above lens is preferably made of the following material, and the ratio of the material refractive index to the Abbe number of the first lens L1 is 1.5/64.
- the materials of the second, third, fourth, and fifth lenses may be the same, and the ratio of the refractive index to the Abbe number is 1.8/25, and the tolerance of each refractive index and the Abbe number is 5%.
- a sixth lens L6 may be further added to the light emitting side of the fifth lens L5, and the sixth lens L6 Preferably, it is a planar lens comprising an eleventh curved surface S11 and a twelfth curved surface S12, and the eleventh curved surface S11 and the twelfth curved surface S12 have a radius of curvature of ⁇ .
- the sixth lens L6 It is mainly used to protect other imaging lenses in the lens to prevent other lenses from being affected by dust, moisture, high temperature or low temperature.
- the sixth lens L6 can select the same material as the first lens L1, and the ratio of the refractive index to the Abbe number Nd/Vd is 1.5/64 with a tolerance of 5%.
- the center thickness D6 can be 1 mm and the tolerance is 5%; and the eleventh surface S11 of the sixth lens L6 and the tenth surface of the fifth lens L5 The spacing of the S10 on the optical axis is 4.4mm and the tolerance is still 5%.
- the lens can be regarded as a microscope objective of large relative aperture, long working distance, large field of view and flat field in geometric optics.
- the lens is a microscope objective that combines a large field of view, a large relative aperture, a long working distance, and a flat image field. Effectively improve printing fineness and clarity, color reproduction is more realistic, and because of its long working distance, it is more convenient to operate.
- Figures 2 ⁇ 5 characterize the imaging quality of the F ⁇ lens for far-infrared laser cutting from different evaluation angles.
- Figure 2 shows the geometric aberration curve, which shows 6
- the aberrations in different fields of view, the left and right images in the aberration diagrams in each field of view represent the aberrations of the meridional and arc out directions respectively.
- the graph shows that the geometric aberration of the lens is well corrected and imaged. Clear.
- Figure 3 shows the diffuse spots in different fields of view.
- the reference range of this figure is 2 ⁇ m. It can be seen from the figure that the diffuse speckle is small and the energy concentration is high, which is beneficial to improve the printing precision.
- Figure 4 shows the transfer function M.T.F and the horizontal axis represents the number of pairs per mm. Xlp/mm The vertical axis represents the percentage. As a laser-printed lens, it requires a very high resolution. From this figure, it can be seen that the transfer function M.T.F is still as high as 60% when the resolution is 500 lp/mm. , fully meet the printing requirements.
- Figure 5 shows the optical transfer function O.T.F, and the horizontal axis represents the field of view.
- the field of view of this figure is 2mm.
- the vertical axis represents the percentage of the transfer function, and the higher the value, the better.
- Figure 5 shows that when the field of view is 2mm, the transfer function has reached 100% when the line number is 200lp/mm. Can meet the printing requirements very well.
- the large field of view, large aperture, and ultra-long working distance of the focus lens The image quality has reached the ideal level of the limit value, completely flat field.
- the wave difference is less than 0.1 ⁇ (0.1) in the ⁇ 4mm imaging range. Double incident wavelength), high printing accuracy.
- the present invention further provides a laser printing apparatus, comprising a fiber laser 601 and a high speed rotating printing drum 602, with reference to FIG.
- the printing drum 602 is provided with a printing medium layer 603, and a focusing lens 604 is disposed between the fiber laser 601 and the printing drum 602 for the fiber laser 601.
- the emitted laser light is focused onto a print dielectric layer 603 on the print drum 602, the focus lens 604
- the near-infrared laser focusing lens provided by the invention is used to realize high-definition, high-precision, color-true laser printing.
- the output end of the fiber laser 601 can be connected with a plurality of dense optical fibers 605 For transmitting laser light to the near-infrared laser focusing lens 604, in this embodiment, 64 fibers can be used for laser transmission.
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- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
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- Laser Beam Printer (AREA)
Abstract
Description
Claims (10)
- 一种近红外激光聚焦镜头,其特征在于,包括沿入射光束的传输方向依次共轴设置的第一透镜、第二透镜、第三透镜、第四透镜及第五透镜;所述第一透镜为平凹负透镜,所述第二、第三透镜为双凸正透镜,所述第四、第五透镜为弯月形正透镜;所述第一透镜的凹面与所述第二透镜相对,所述第四、第五透镜的中间部分均逆向所述入射光束的传输方向凸出。
- 如权利要求 1 所述的近红外激光聚焦镜头,其特征在于,所述第一透镜包括第一曲面和第二曲面,所述第二透镜包括第三曲面和第四曲面,所述第三透镜包括第五曲面和第六曲面,所述第四透镜包括第七曲面和第八曲面,所述第五透镜包括第九曲面和第十曲面,所述第一至第十曲面沿所述入射光束的传输方向依次排布;所述第一至第十曲面的曲率半径依次为:∞, 25.5mm , 500mm , -60mm , 200mm , -100mm , 40mm , 130mm , 20mm , 30mm ,公差均为 5% 。
- 如权利要求 2 所述的近红外激光聚焦镜头,其特征在于,所述第一至第五透镜的中心厚度依次为: 3mm , 6mm , 5mm , 5mm , 4mm ,公差均为 5% 。
- 如权利要求 3 所述的近红外激光聚焦镜头,其特征在于,所述第二曲面与第三曲面在光轴上的间距为 20mm ;所述第四曲面与第五曲面在光轴上的间距为 70mm ;所述第六曲面与第七曲面在光轴上的间距为 0.2mm ;所述第八曲面与第九曲面在光轴上的间距为 0.2mm ;各所述间距的公差均为 5% 。
- 如权利要求 1 至 4 任一项所述的近红外激光聚焦镜头,其特征在于,所述第一透镜的折射率与阿贝数之比为 1.5/64 ;所述第二、第三、第四、第五透镜的折射率与阿贝数之比为 1.8/25 ;各所述折射率与阿贝数的公差均为 5% 。
- 如权利要求 2 至 4 任一项所述的近红外激光聚焦镜头,其特征在于,还包括第六透镜,位于所述第五透镜的出光侧,所述第六透镜包括第十一曲面和第十二曲面,所述第十一曲面和第十二曲面的曲率半径均为∞;所述第十一曲面与所述第十曲面在光轴上的间距为 4.4mm ,公差为 5% 。
- 如权利要求 6 所述的近红外激光聚焦镜头,其特征在于,所述第六透镜的折射率与阿贝数之比为 1.5/64 ,公差为 5% 。
- 如权利要求 6 所述的近红外激光聚焦镜头,其特征在于,所述第六透镜的中心厚度为 1mm ,公差为 5% 。
- 一种激光印刷设备,包括光纤激光器、印刷鼓,以及用于将所述光纤激光器发出的激光聚焦到所述印刷鼓上的聚焦镜头,其特征在于,所聚焦镜头采用权利要求 1~8 任一项所述的近红外激光聚焦镜头。
- 如权利要求 9 所述的激光印刷设备,其特征在于,所述光纤激光器的输出端连接有用于将激光传输至所述近红外激光聚焦镜头的多根并排密布的光纤。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2012/083858 WO2014067103A1 (zh) | 2012-10-31 | 2012-10-31 | 一种近红外激光聚焦镜头及激光印刷设备 |
CN201280076750.6A CN104813214B (zh) | 2012-10-31 | 2012-10-31 | 一种近红外激光聚焦镜头及激光印刷设备 |
JP2015540010A JP6046264B2 (ja) | 2012-10-31 | 2012-10-31 | 近赤外線レーザフォーカスレンズ及びレーザ印刷デバイス |
US14/439,360 US9533514B2 (en) | 2012-10-31 | 2012-10-31 | Near-infrared laser focusing lens and laser printing device |
EP12887440.1A EP2908164B1 (en) | 2012-10-31 | 2012-10-31 | Near-infrared laser focusing lens and laser printing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2012/083858 WO2014067103A1 (zh) | 2012-10-31 | 2012-10-31 | 一种近红外激光聚焦镜头及激光印刷设备 |
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WO2014067103A1 true WO2014067103A1 (zh) | 2014-05-08 |
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US (1) | US9533514B2 (zh) |
EP (1) | EP2908164B1 (zh) |
JP (1) | JP6046264B2 (zh) |
CN (1) | CN104813214B (zh) |
WO (1) | WO2014067103A1 (zh) |
Cited By (2)
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CN110351459A (zh) * | 2019-06-18 | 2019-10-18 | 惠州市星聚宇光学有限公司 | 用于手机摄像的微距成像系统 |
CN111505795A (zh) * | 2019-01-30 | 2020-08-07 | 成都理想境界科技有限公司 | 一种投影物镜 |
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CN105892046B (zh) * | 2016-03-24 | 2018-08-31 | 武汉华工激光工程有限责任公司 | 红外二维扫描镜组 |
CN112305726B (zh) * | 2020-12-30 | 2021-04-02 | 武汉华工激光工程有限责任公司 | 校正沿着光束传播方向的光学聚焦点分布状态的物镜 |
CN113467059B (zh) * | 2021-09-03 | 2022-02-11 | 江西联创电子有限公司 | 红外共焦广角镜头 |
CN118033875B (zh) * | 2024-04-09 | 2024-06-18 | 宁波舜宇光电信息有限公司 | 一种广角对焦光学成像镜头及成像设备 |
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Also Published As
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CN104813214B (zh) | 2017-03-22 |
JP2016503514A (ja) | 2016-02-04 |
US20150298465A1 (en) | 2015-10-22 |
JP6046264B2 (ja) | 2016-12-14 |
EP2908164A4 (en) | 2016-08-03 |
EP2908164B1 (en) | 2018-07-04 |
EP2908164A1 (en) | 2015-08-19 |
US9533514B2 (en) | 2017-01-03 |
CN104813214A (zh) | 2015-07-29 |
CN104813214A8 (zh) | 2017-01-18 |
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