Development of a double-gauss lens based setup for optoacoustic applications

Hojong Choi, Jae Myung Ryu, Jung Yeol Yeom

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


In optoacoustic (photoacoustic) systems, different echo signal intensities such as amplitudes, center frequencies, and bandwidths need to be compensated by utilizing variable gain or time-gain compensation amplifiers. However, such electronic components can increase system complexities and signal noise levels. In this paper, we introduce a double-Gauss lens to generate a large field of view with uniform light intensity due to the low chromatic aberrations of the lens, thus obtaining uniform echo signal intensities across the field of view of the optoacoustic system. In order to validate the uniformity of the echo signal intensities in the system, an in-house transducer was placed at various positions above a tissue sample and echo signals were measured and compared with each other. The custom designed double-Gauss lens demonstrated negligible light intensity variation (±1.5%) across the illumination field of view (~2 cm diameter). When the transducer was used to measure echo signal from an eye of a bigeye tuna within a range of ±1 cm, the peak-to-peak amplitude, center frequency, and their −6 dB bandwidth variations were less than 2 mV, 1 MHz, and 6%, respectively. The custom designed double-Gauss lens can provide uniform light beam across a wide area while generating insignificant echo signal variations, and thus can lower the burden of the receiving electronics or signal processing in the optoacoustic system.

Original languageEnglish
Article number496
JournalSensors (Switzerland)
Issue number3
Publication statusPublished - 2017 Mar 3

Bibliographical note

Funding Information:
This paper was supported by the Research Fund, Kumoh National Institute of Technology.

Publisher Copyright:
© 2017 by the authors. Licensee MDPI, Basel, Switzerland.


  • Double-Gauss lens
  • Optoacoustic applications
  • Transducer

ASJC Scopus subject areas

  • Analytical Chemistry
  • Information Systems
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering


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