By: Michael Scaggs Athermalization of focusing objectives is a common technique for optimizing imaging systems in the infrared where thermal effects are a major concern. The athermalization is generally done within the spectrum of interest and not generally applied to a single wavelength. By applying athermalization techniques to a laser system, a significant reduction in […]
Laser Insights
Microdrilling of Sheet Materials with Femtosecond Laser Pulse Shaped by Computer Generated Hologram
By: Hayato Kawashima, Masahiro Yamaji, Jun’ichi Suzuki, Shuhei Tanaka We have developed a three-dimensional (3D) femtosecond laser processing method using a computer generated hologram (CGH) that generates a 3D structure inside transparent materials. Since 3D structure can be formed simultaneously with femtosecond laser pulses shaped by a CGH, our method is high efficient, and it […]
Laser Shock Process
By: Che Zhi-gang The technique of laser shock process (LSP) is an advanced surface treatment, which import high pressure shock wave induced by laser beam into target materials to improve their performance. The fatigue life of the materials is prolonged by times through changing the stress distribution. The hardness and strength are increased remarkably and […]
Laser Fabrication of Nanobump Arrays on Si Substrate Via Optical Near-Field Enhancement
By: X.C. Wang, H.Y. Zheng, C. W. Tan, F. Wang, H. Y. Yu, K. L. Pey Singapore Institute of Manufacturing Technology (SIMTech), Singapore School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore Modern technology requires the ability of creating smaller and smaller devices. Whether it is for information storage, high definition displays or sensor arrays, […]
Laser Welding of Micro-VLE-Measurement Device and its Practical Application
By: Marika Hirvimäki, Heidi Piili, Arttu Jussila, Tuomas Purtonen, Matti Manninen, Petri Uusi-Kyyny, Aarne Sundberg, Ville Alopaeus, Antti Salminen Lappeenranta University of Technology, Finland Aalto University, Department of Biotechnology and Chemical Technology, Finland Machine Technology Centre Turku Ltd, Finland The knowledge of phase equilibrium is critical for the modeling and operation of reactors and separation units. […]