OmniVision Technologies and Lighthouse Imaging have assembled a platform that enables medical device manufacturers to seamlessly integrate stereoscopic 3D imaging into endoscopes. The platform incorporates two CMOS image sensors and an image signal processor (ISP) from OmniVision, plus a light control board for LED illumination and camera control unit from Lighthouse.
The platform includes two OmniVision OH02A image sensors with 1.4-micron pixel PureCel technology in a 1/6-inch optical format. These sensors support alternate-row high dynamic range (HDR) for high-quality imaging of both bright and dark areas. They are also stereo-ready, with FrameSync technology that enables accurate synchronization of the sensors. On-chip pulse width modulation enables the sensors to drive the LEDs at the endoscope’s distal tip, while antireflective coating on the cover glass removes ghosting. These sensors come in chip-scale packages (CSPs) with two-lane MIPI output and have low power consumption for low heat at the distal tip.
The 2-megapixel, 1080p resolution of the OH02A image sensor supports streaming video at 60 frames per second (fps), allowing an entire medical team to view high-quality images on a large television monitor. Additionally, the Lighthouse platform can be easily adapted to use OmniVision sensors with 720p or 4K/2K resolution, depending on whether cost or resolution take priority for the medical OEM.
The OVMed ISP back-end processor provides stereo 3D vision. Its compact form factor fits inside the camera control unit (CCU) / video processor unit (VPU). Additionally, it supports an integrated design—including analog-to-digital converter, and dual-channel ISP and PC interface—which offers best-in-class image quality and feature set. An input interface is provided for dual OmniVision image sensors, and video is output via a dual-USB2.0 interface. The predefined GPIO pins connect to buttons to control the system. This processor has a fast response time (<100 ms), LED control and low power consumption. A software development kit (SDK) and API are provided, and this software is compatible with the Windows operating system.