Launch of the OmniVision image sensor for endoscopes and catheters

OmniVision Technologies, a developer of advanced digital imaging solutions, has released the OVMed OH0FA image sensor and OAH0428 bridge chip for endoscopes and catheters.

The OH0FA image sensor delivers 720×720 resolution at 30 frames per second (fps) – the highest resolution available for ENT, cardiac, arthro, OB-GYN and utero-renal endoscopes, providing visibility for surgeons to see and diagnose the disease at an early stage. The OAH0428 bridge chip, specially developed for 720×720 resolution compatibility, provides analog-to-digital conversion and flexibility for a variety of analog and digital inputs and outputs.

Ehsan Ayar, Director of Medical Product Marketing at OmniVision, said, “OmniVision has worked with surgeons and medical device OEMs for 15 years, and our products have been used by surgeons in over 15 million procedures, we understand the needs of surgeons. and endoscope requirements. Based on this feedback, we designed the OH0FA image sensor to deliver the highest resolution at the best possible frame rate, with the flexibility to increase the frame rate to a lower resolution to meet the procedures with different requirements. Additionally, we have incorporated a high level of flexibility with the OAH0428 bridge chip. »

The 720×720 resolution of the OH0FA represents a dramatic increase over the previous generation image sensor, the OVM6946, at 400×400. The OH0FA offers an optional range of resolution and frame rate combinations, depending on the procedural requirements: 720×720 at 30 fps, 600×600 at 40 fps, or 400×400 at 60 fps. The device’s high signal-to-noise ratio yields sharper, clearer images with excellent color fidelity, so surgeons can see the most realistic images to better diagnose and treat disease.

The OH0FA is a 0.93×0.93 mm sensor in 1/18 inch optical format. Its 1.008µm pixel size is based on OmniVision’s PureCel Plus-S pixel technology. This next-generation pixel technology also delivers high color fidelity and a 37.5dB signal-to-noise ratio for sharper images. PureCel Plus-S enables OH0FA to have high full well capacity, zero flowering and low power consumption. A version of OCHFA, based on OmniVision’s CameraCubeChip technology, will soon be launched for single-use endoscopes.

Special features of the OAH0428 companion chip include HDR, auto-start, pseudo-global shutter, enhanced NIR sensitivity, and various security features. It is also autoclavable. The OAH0428 has a proprietary four-pin analog interface that can transmit up to four meters. Exposure time and gain parameters can be sent from an external SPI control, automatically by the internal AEC/AGC OAH0428 or manually by the host.

OmniVision’s OVMed product line consists of medical grade components subject to certification, qualification and testing. This increases the likelihood and speed of FDA certification for medical device OEMs, while providing hospitals, surgeons, and patients with a high level of confidence in the endoscope.

The OH0FA image sensor and OAH0428 bridge chip are now available for sampling in OmniVision’s hCSP chip-scale package with 100-micron thick cover glass and anti-reflective coating. OmniVision offers an evaluation kit with a pre-tested OVMed image signal processor to enable rapid evaluation and development.

Michael C. Garrison