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OmniVision Launches New Medical Image Sensor, Camera Module


March 9, 2021

OmniVision Technologies, which develops advanced imaging solutions, announced two new products in the medical imaging space. The OH0TA OVMed medical image sensor quadruples the resolution of its previous sensor, and also breaks the Guinness World Record for “smallest commercially available image sensor.” The second launch is the OVMed OCHTA camera module, which also improves image quality for single-use endoscopy procedures in the smallest parts of the body. 

The OH0TA sensor is just 0.55 mm by 0.55 mm, featuring a 1.0 micron pixel and 1/31-inch optical format. It quadruples the RGB image resolution to 400×400, or 160K pixels, at 30 frames per second, while reducing the power consumption to 20%, to 20mW. This size 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, OmniVision said. 

In addition, the increased resolutions 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. The sensor’s lower power consumption reduces “chip on tip” camera heat, which provides greater patient comfort and longer procedure durations while also reducing noise for crisper images, the company said. 

“The trend toward minimally invasive procedures continues to grow, due to their greater success rates and shorter patient recovery times,” said Ehsan Ayar, medical product marketing manager at OmniVision. “However, for the narrowest areas of the anatomy, particularly in neuro and cardiac surgeries, previous sensors did not have the necessary combination of high resolution and extremely small size. The OH0TA is the world’s first sensor to offer this combination, enabling significant endoscope improvements, especially in comparison to traditional videoscopes made with optical fibers, which have limited resolution, poor imager quality and high cost.”

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.

OmniVision said samples are now available, in its hCSP chip scale package with 100 micron thick cover glass and an anti-reflective coating. More details are available here.

The OCHTA camera module features the company’s CameraCubeChip wafer-level technology, enabling it to match the size of its predecessor, at 0.65 mm x 0.65 mm. It also allows for the integration of the OH0TA image sensor, along with signal processing and wafer-level optics in a single package. With the new module, endoscope, catheter and guidewire developers can create mass-produced, single-use devices with 1-2 mm optical diameters and higher resolutions to address the many challenges posed by reusable equipment, including cross-contamination and high maintenance costs, OmniVision said.

“Previously, medical procedures on the body’s smallest anatomy were performed either blind or with low quality images from fiberscopes, as existing cameras were too big and reusable endoscopes were not cost effective,” said Aaron Chiang, marketing director at OmniVision. “The OCHTA wafer-level camera module maintains the industry’s smallest size while quadrupling the resolution for single-use endoscopes, catheters and guidewires, which reduce the cross-contamination risks and downtime inefficiencies of reusable devices, as well as costs from their repairs, preprocedural testing and sterilization.”

Other key features include a wide 120 degree field of view and an extended focus range of 3mm to 30mm. This module 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.

The OCHTA camera module is available now for sampling in the tray format. More details are available here.

Editor’s note: Images not to scale

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