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Full-field transmission-type angle-deviation optical microscope with reflectivity-height transformation.

Ming-Hung Chiu1, Chen-Tai Tan1, Ming-Hung Tsai1

  • 1Department of Electro-Optical Engineering, National Formosa University,No. 64, Wunhua Road, Huwei, Yunlin 632, Taiwan.

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|October 28, 2015
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Summary
This summary is machine-generated.

A novel 3D optical microscope uses angle deviation and reflectivity-height transformation to measure surface topography. This method accurately maps object surface height based on light

Keywords:
(080.2730) Matrix methods in paraxial optics(110.0180) Microscopy(110.4500) Optical coherence tomography(110.4850) Optical transfer functions(180.6900) Three-dimensional microscopy

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Area of Science:

  • Optics and Photonics
  • Microscopy
  • Surface Metrology

Background:

  • Accurate 3D surface profiling is crucial for material science and nanotechnology.
  • Traditional microscopy methods often face limitations in resolution and 3D reconstruction.
  • Developing non-contact, high-resolution 3D surface measurement techniques is an ongoing challenge.

Purpose of the Study:

  • To develop and demonstrate a full-field transmission-type three-dimensional optical microscope.
  • To utilize the angle deviation method (ADM) and reflectivity-height transformation (RHT) for surface height measurement.
  • To achieve precise 3D surface topography mapping using optical principles.

Main Methods:

  • Construction of a transmission-type 3D optical microscope.
  • Application of the angle deviation method (ADM) to measure light deviation angles.
  • Implementation of the reflectivity-height transformation (RHT) algorithm.
  • Utilizing a parallelogram prism and two CCDs for reflectivity and angle measurements near the critical angle.

Main Results:

  • Demonstrated a direct proportionality between surface height and the deviation angle of transmitted light.
  • Successfully measured surface height by analyzing reflectivity near the critical angle.
  • Validated the effectiveness of the ADM and RHT algorithm in 3D surface profiling.

Conclusions:

  • The developed 3D optical microscope provides an effective method for non-contact surface height measurement.
  • The combination of ADM and RHT offers a robust approach for 3D surface topography reconstruction.
  • This technique has potential applications in various fields requiring precise surface analysis.