OmniVision Technologies‘ OH0TA OVMed® medical image sensor with a package size of just 0.55 mm x 0.55 mm, features a 1.0 micron pixel and a 1/31” optical format—smaller than the Guinness World Record held by its predecessor for the “Smallest Commercially Available Image Sensor.”
The OH0TA also quadruples the RGB image resolution to 400 x 400, or 160 Kpixels, at 30 frames per second, while reducing the power consumption by 20% to 20 mW. This allows designers to add ultra-compact visualization to single-use and reusable endoscopes, as well as catheters and guidewires, with a small outer diameter of 1-2 mm. Alternatively, this sensor’s uniquely small size gives medical device OEMs the flexibility to create a larger-diameter scope with a larger working channel.
The OH0TA’s increased resolution allows higher quality color images to be captured from within the body’s smallest organs, enabling medical devices to reach deeper into the body for procedures such as neuro, ophthalmic, ENT, cardiac, spinal, urology, gynecology and arthroscopy, as well as dental and veterinary diagnosis and surgery. Additionally, the sensor’s lower power consumption reduces “chip on tip” camera heat for greater patient comfort and longer procedure durations, while also reducing noise for crisper images.
To achieve this increase in resolution, along with a smaller pixel size and optical format, the OH0TA is built on OmniVision’s PureCel®Plus-S stacked die technology. This next-generation pixel technology also provides higher color fidelity and excellent low light sensitivity of 3600 mV/lux-sec, along with a high signal-to-noise ratio of 37.5 dB for crisper images. Additionally, PureCel®Plus-S enables the OH0TA’s higher full well capacity (FWC), zero blooming and lower power consumption.
Other key features include a 15.5 degree chief ray angle, enabling the use of lenses with high fields of view and short focus distances. It also supports a 4-wire interface, as well as raw analog data output, both of which can transmit via cables as long as 4 meters with minimal signal noise. For backward compatibility and easy adoption, this sensor interfaces with OmniVision’s existing OV426 analog-to-digital-conversion bridge chip. Additionally, it is autoclavable for reusable endoscope sterilization.
Samples of the OH0TA are available now, in OmniVision’s hCSP chip scale package with 100 micron thick cover glass and an anti-reflective coating. For more information, contact the OmniVision sales representative: www.ovt.com/contact-sales.
