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Related Concept Videos

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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High-speed Particle Image Velocimetry Near Surfaces
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Published on: June 24, 2013

Laser focus positioning method with submicrometer accuracy.

Ilya Alexeev1, Johannes Strauss, Andreas Gröschl

  • 1Chair of Photonic Technologies, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen 91052, Germany. ilya.alexeev@lpt.uni-erlangen.de

Applied Optics
|January 23, 2013
PubMed
Summary
This summary is machine-generated.

This study presents a novel, non-contact method for precise laser micromanufacturing sample positioning. It utilizes nonlinear harmonic generation for accurate surface detection, improving efficiency and repeatability.

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Area of Science:

  • Laser-based manufacturing
  • Optical metrology
  • Nanotechnology

Background:

  • Accurate sample positioning is critical for laser micromanufacturing.
  • Existing surface detection methods often lack integration with the processing laser.
  • Methods using the processing laser beam offer inherent compensation for beam variations.

Purpose of the Study:

  • To develop a direct, contact-free method for determining workpiece position relative to the laser focal plane.
  • To enhance precision and efficiency in laser micromanufacturing alignment.
  • To leverage nonlinear harmonic generation for accurate surface detection.

Main Methods:

  • A direct, contact-free approach was employed.
  • Nonlinear harmonic generation was utilized to detect workpiece position.
  • The method uses the processing laser beam for measurement.

Main Results:

  • The developed method achieves accurate workpiece positioning.
  • Surface detection repeatability and accuracy are less than 1 μm.
  • The technique offers precise and time-efficient workpiece alignment.

Conclusions:

  • The nonlinear harmonic generation method provides a robust solution for sample positioning in laser micromanufacturing.
  • Automation is facilitated, leading to improved efficiency.
  • High accuracy and repeatability are achieved, crucial for advanced manufacturing processes.