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An integrating sphere to measure CD from difficult samples

Castiglioni1, Albertini

  • 1Jasco Europe srl, Cremella, Italy.

Chirality
|May 2, 2000
PubMed
Summary

A new demountable integrating sphere was developed for CD spectropolarimeters, enabling versatile sample analysis in transmission and reflectance modes without complex alignment or extra detectors.

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Area of Science:

  • Spectroscopy
  • Optical Physics
  • Materials Science

Background:

  • Integrating spheres are crucial for spectrophotometry, measuring samples in transmission or reflectance modes.
  • Commercial CD spectropolarimeters benefit from accessories for diverse sample analyses.
  • Existing setups often require complex alignment or specialized detectors.

Purpose of the Study:

  • To develop a versatile, demountable integrating sphere prototype for CD spectropolarimeters.
  • To simplify sample analysis in both scattered transmission and total reflectance modes.
  • To evaluate the performance and wavelength range of the novel integrating sphere.

Main Methods:

  • Construction of a demountable integrating sphere prototype.
  • Integration with a commercial CD spectropolarimeter without requiring alignment.
  • Sample insertion at the sphere entrance (transmission) or center (reflectance).

Main Results:

  • The prototype sphere fits commercial CD spectropolarimeters easily.
  • No dedicated photomultiplier or complex alignment is necessary.
  • Experimental data demonstrate the sphere's efficiency and wavelength range for various sample forms.

Conclusions:

  • The demountable integrating sphere offers a user-friendly solution for spectropolarimetric analysis.
  • It expands the capabilities of CD spectropolarimeters for transmission and reflectance measurements.
  • The design facilitates efficient and versatile sample characterization.

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