Diabetic Retinopathy Camera – medical electronics design

Diabetic Retinopathy Camera – medical electronics design

Working closely with our start-up customer, A2E designed a size, cost and performance critical PCBA and RTOS-based device control firmware for the customer’s novel 180 gram, portable, low-cost retinal fundus camera. The patented device was designed to provide lower-cost access to eyesight monitoring for diabetes sufferers in developing countries and to enable clinician tele-medicine.

This involved creating a 1.2 megapixel monochrome USB camera with 15fps raw output over USB 2.0, conformant to EN60601 medical requirements on a compact single board assembly. The USB interface provides power for the device and is used to control the image sensor and associated illumination LEDs as well as transferring image data to the host computer for processing and display. The pcba had to be designed to only draw 120mA, which is important when it’s drawing on a laptop for power. The device firmware implements standards-compliant USB endpoints for image and device control.