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Building a setup capable of characterizing large and low-loss optics: "STAR".

E Hirose1, K Mochizuki2, T Kinoshita2

  • 1inhbar, Inc., 3-16-13 Shinmei, Kita 2, Adachi-ku, Tokyo 121-0051, Japan.

The Review of Scientific Instruments
|July 3, 2020
PubMed
Summary

A new instrument, STAR (scattering, transmittance, absorption, and reflectance), efficiently characterizes large optics. This versatile setup measures optical properties for coated and uncoated optics up to 500 mm diameter.

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Area of Science:

  • Optical Engineering
  • Metrology
  • Laser Physics

Background:

  • Characterizing large optics is crucial for various applications.
  • Existing methods can be time-consuming and require specialized equipment.
  • Low-loss optics demand precise measurement techniques.

Purpose of the Study:

  • To present a novel, compact instrument for comprehensive optical characterization.
  • To detail the design and capabilities of the STAR setup.
  • To demonstrate the instrument's effectiveness in measuring optical properties.

Main Methods:

  • Development of the STAR (scattering, transmittance, absorption, and reflectance) setup.
  • Utilizing 1064 nm laser light for measurements.
  • Designing for shared optical components to ensure compactness and rapid switching between measurement modes.
  • Implementing large-area scanning capabilities (≥500 mm diameter).

Main Results:

  • The STAR instrument enables efficient characterization of large optics.
  • The setup is compact and allows quick transitions between scattering, transmittance, absorption, and reflectance measurements.
  • The instrument successfully measured properties of both coated and uncoated optics.
  • Demonstrated capability for scanning optics with diameters of 500 mm or larger.

Conclusions:

  • The STAR setup provides a versatile and efficient solution for characterizing large optics.
  • The instrument's design facilitates rapid, multi-modal optical property measurements.
  • This development advances the metrology of optical components for demanding applications.