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Shift-variant digital holographic microscopy: inaccuracies in quantitative phase imaging.

Ana Doblas1, Emilio Sánchez-Ortiga, Manuel Martínez-Corral

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Quantitative phase digital holographic microscopy (QDHM) using non-telecentric systems introduces phase measurement errors. Telecentric systems eliminate these errors, ensuring shift-invariant QDHM performance for accurate imaging.

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Area of Science:

  • Optical microscopy
  • Holography
  • Metrology

Background:

  • Quantitative phase digital holographic microscopy (QDHM) is a powerful technique for label-free imaging.
  • Non-telecentric imaging systems can introduce aberrations and inaccuracies in QDHM measurements.
  • Understanding and mitigating these inaccuracies is crucial for reliable phase measurements.

Purpose of the Study:

  • To analyze inaccuracies in QDHM caused by non-telecentric imaging systems.
  • To investigate the impact of numerical compensation errors on phase measurements.
  • To evaluate the performance of telecentric imaging systems in QDHM.

Main Methods:

  • Computer modeling of experimental results.
  • Analysis of phase measurement errors.
  • Experimental validation using holographic recordings.

Main Results:

  • Negligible errors in numerical compensation lead to position-dependent phase measurement errors in non-telecentric systems.
  • Telecentric imaging systems demonstrate shift-invariant behavior in QDHM.
  • QDHM with telecentric systems provides accurate and reliable phase measurements.

Conclusions:

  • Non-telecentric imaging systems introduce significant errors in QDHM phase measurements.
  • Telecentric imaging systems are essential for achieving shift-invariant and accurate QDHM.
  • The findings provide guidelines for optimizing QDHM systems for precise quantitative phase imaging.