Haris Riris

Title: Haris Riris: Innovator in Oxygen Sensing Technology

Introduction

Haris Riris is a notable inventor based in Menlo Park, CA. He has made significant contributions to the field of oxygen sensing technology, holding 2 patents that showcase his innovative approach to solving complex problems in this area.

Latest Patents

One of his latest patents is a pressure- and temperature-compensating oxygen sensor. This invention utilizes RF modulation spectroscopy of a near-infrared tunable laser diode source to determine the oxygen concentration in a sample medium. A reference cell containing a known concentration of oxygen is employed to calibrate the apparatus and lock the laser on an oxygen absorption line. The temperature of the reference cell is monitored, allowing for the determination of pressure within the cell. Both temperature and pressure in the sample cell are monitored, either directly with independent transducers or indirectly through spectroscopic techniques. This invention effectively corrects for temperature and pressure effects to accurately determine the oxygen content of the sample.

Another significant patent involves diagnostic tests using near-infrared laser absorption spectroscopy. In this invention, RF modulation spectroscopy of a near-infrared laser diode source is used to ascertain the amount of a target substance in a breath sample. The laser output is modulated to create sidebands displaced from the laser carrier by the modulation frequency. The modulated beam passes through a gas sample, which differentially absorbs the sidebands. This process converts some of the laser frequency modulation into amplitude modulation, which is detected using a broadband photodetector. In certain tests, the target substance is a specific isotope, and the concentration is measured as an isotope ratio. The invention allows for the measurement of both first and second isotopic species by providing laser illumination at characteristic wavelengths for their absorption lines.

Career Highlights

Haris Riris is currently employed at SRI International, where he continues to develop innovative technologies in the field of sensing and diagnostics. His work has contributed to advancements in medical diagnostics and environmental monitoring.

Collaborations

He has collaborated with notable colleagues, including David E. Cooper and Clinton B. Carlisle, who have also contributed to the field of sensing technologies.

Conclusion

Haris Riris is a distinguished inventor whose work in oxygen sensing technology has led to significant advancements in the field. His innovative patents reflect his commitment to improving diagnostic methods and enhancing our understanding