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Laser Micro-engraving

Abstract

Laser engraving and processing has been widely used in a variety of industrial products and consumer goods, and its importance is self-evident. Now commonly used laser engraving machine for the use of a laser beam at the surface ablation (ablation), according to the power of the laser beam of wavelength and pulse length is different, can produce a variety of effects. Under precision optical scanning machine control mechanism and a computer program that can be carved out like a black and white photo-like images of the effect, and because carved up internal layer material, it will not print the same image, but because often touch off. However, the traditional reliance laser engraving size of the power of the engraving depth is formed, that contrast "black and white", the more rigid it is rendered on. Imaging of the experiment erected capture and optical laser marking system architecture, aimed at improvement of traditional architecture of the optical laser marking systems provide synchronized and precise image alignment functions. Its mode of action of the CCD image capture imaging modalities, prior to capture images of the workpiece, and sculpture obtained optical image resolution equivalent to set the size and location of the work area, and according to precise 3D positional alignment of the workpiece work area. Thus, due to the visual correction of errors traditionally caused by significantly reduced and avoid repeated trial and error, and can quickly locate, find and significantly reduce the time to position the work area. Application of the principle of laser marking systems and improved optical architectures traditional laser marking systems. Its working principle is the concept of combining small Galvo-mirror-cum-confocal imaging modalities, coupled with high-precision Projection Lens combination 4f system with a high numerical aperture (Numerical Apertu re) of the objective lens and a large area scan feature, this system can promptly locate the work carving microscopic images, which may be less than the minimum resolution microscopy 1.0μm. So, the traditional laser marking systems carving a wide range of improvements to high-resolution microscopic engraving system. In this study, there are two microscopic engraving system :( a) femtosecond laser microscopy engraving system. (B) nanoseconds microscopic laser engraving systems. Use Multi-Wall Carbon Nanotube as a sample, and with the SEM (scanning electron microscope) Comparison of femtosecond laser with nanosecond laser engraving microscopic do when different result produced by different laser interaction with the material produced.

principle 

Application of the principle of laser marking systems and improved optical architectures traditional laser marking systems. Its working principle is the concept of combining small Galvo-mirror-cum-confocal imaging modalities, coupled with high-precision Projection Lens-MVX 10 M acroview its high numerical aperture (Numerical Aperture) of the objective lens and a large area scan feature, this system can be promptly positioned carving microscopic images of the workpiece, the minimum resolution microscopy to 2.0μ. So, the traditional laser marking systems carving a wide range of improvements to high-resolution microscopic engraving system

Experimental setup 

There are two mechanisms microscopic engraving :( a) for the use of small Galvo-mirror do XY plane scanning, coupled with high-precision Projection Lens-MVX 10 M acroview its high numerical aperture (Numerical Aperture) of the objective lens to scan a large area characteristics do XY plane was micro engraving. (B) for the use of a coaxial laser light source to conjugate focus scan mode (or pinhole spatial filter plus photodetector) imaging of the workpiece, so the imaging plane while the laser engraving is also the role of a plane, up to full synchronization of the correction. Let the image plane and machining plane conjugate to each other forming the basic principle of the present program, so very convenient to use the software to set the machining plane.

      


Applications 

  1. Anti-counterfeiting
  2. Micro-machining
  3. Cell engineering
Laser micro engraving examples
Arrayed cell patterning

Related publications 

  1. Gitanjal Deka, Kazunori Okano, and Fu-Jen Kao, Dynamic photo-patterning of cells in situ by Q-switched Nd:YVO4 laser, J. Biomed. Opt., 19 (1), 011012, 2014.
  2. Gitanjal Deka, Kazunori Okano,* Hiroshi Masuhara, Yaw-Kuen Li and Fu-Jen KaoMetabolic variation of HeLa cells migrating on microfabricated cytophilic channels studied by the fluorescence lifetime of NADH, RSC Adv., 2014,4, 44100-44104 (http://dx.doi.org/10.1039/C4RA06492E).