Related Experiment Video
Updated: Jul 6, 2026

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults
Published on: February 9, 2022
Improved Ronchi tester
J M Nuñez-Alfonso1, A Cordero-Dávila, S Vergara-Limon
1Facultad de Ciencias Físico Matemáticas, Posgrado en optoelectrónica, Benemérita Universidad Autónoma de Puebla, Puebla 72000, México. mnunez@fcfm.buap.mx
Abstract:
We used a LED in a Ronchi tester to obtain two main improvements: (i) We can choose one of two wavelength bands to illuminate and record the ronchigram, and (ii) we can change the irradiance of the illumination source according to the optical system under test and the detector array. This can be done by use of an adequate electronic circuit.
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