Fisheye Lens Design for Solar-powered Mobile Ultrasound Devices

Overview

Journal Technol Health Care

Publisher Sage Publications

Specialties Biomedical Engineering
Biotechnology
Health Services

Date 2022 Feb 6

PMID 35124601

Authors

Seonho Ryu

Jaemyung Ryu

Hojong Choi

Affiliations

Soon will be listed here.

Abstract

Background: Compared to benchtop ultrasound machines, mobile ultrasound machines require portable batteries when acquiring information regarding human tissues during outdoor activities.

Objective: A novel fisheye lens type was designed to address the charging issue where it is difficult to constantly track the sun. This method does not require the use of a mechanical motor that constantly tracks the sun to charge the portable batteries.

Methods: To obtain an optical solar power system, the numerical aperture (NA) and field angle must be increased. Therefore, we use the fisheye lens with the largest field angle.

Results: The NA of the designed fisheye lens system reaches 0.75, allowing light collection of approximately ± 48∘. Additionally, the efficiency ratio of the central and surrounding areas also satisfies more than 80% at a field angle of 85∘ and more than 70% at field angles of 85∘ to 90∘, respectively.

Conclusions: We designed a novel fisheye lens for solar-powered mobile ultrasound machines used outdoors.

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