Views: 0 Author: Site Editor Publish Time: 2025-11-14 Origin: Site
In the field of medical endoscopy, the performance of image sensors directly affects diagnostic accuracy and surgical success rates. OmniVision's OV6946 and its upgraded product OCHTA10 are both important image sensors specifically designed for medical endoscopy.
Although these two sensors come from the same manufacturer, they each have different focuses in terms of performance characteristics. Understanding their subtle differences is crucial for medical device manufacturers when selecting appropriate components, as this not only affects imaging quality but also relates to the reliability of medical equipment and patient safety.
The OV6946 was launched by OmniVision in 2017 and is known in the industry as the "large sesame." Its chip size is 1.10mm × 1.10mm, using a compact size package.
This sensor can capture high-quality 400×400 resolution video at 30 frames per second and is widely used in medical scenarios such as precise diagnosis, non-invasive detection, and minimally invasive surgery.
The OCHTA10 is an upgraded product launched by OmniVision based on the OV6946, belonging to a new generation of single-use endoscopic ultra-fine medical-grade wired modules.
It uses a 0.45mm ultra-fine cable to connect the 400×400 resolution miniature imager to the endoscope, with significant improvements in both volume and imaging resolution.
From the perspective of technological development, OmniVision first launched the OV6946 (large sesame), then developed the smaller OV6948 (small sesame) in 2019, and between 2021 and 2023, introduced upgraded versions OCHFA and OCHTA for the "large sesame" and "small sesame" respectively.
The OCHTA10 is a product of this technological evolution, representing OmniVision's latest technological achievement in the field of medical imaging sensors.
Both OCHTA10 and OV6946 are medical-grade image sensors launched by OmniVision, primarily used in endoscopic and catheter devices. However, they differ significantly in technical specifications, performance, and market positioning. OCHTA10, as an upgraded model, focuses more on high performance and miniaturization, while OV6946 dominates the mainstream market with cost-effectiveness and maturity.
| Comparison Dimension | OCHTA10 | OV6946 |
| Resolution | 400×400 (supports multi-resolution switching) | 400×400 |
| Package Size | 550×550μm | 1.10×1.10mm |
| Optical Format | 1/31-inch | 1/18-inch |
| Pixel Size | 1.008μm × 1.008μm | 1.75μm × 1.75μm |
| Pixel Technology | PureCel® Plus-S | OmniBSI™ |
| Sensitivity | 3600 mV/lux-sec | 1000 mV/lux-sec |
| Core Advantages | Miniaturization, high sensitivity, low power consumption | Cost-friendly, mature technology, large usage volume |
OCHTA10 adopts OmniVision's next-generation PureCel® Plus-S wafer stacking technology, achieving a 1.0-micron pixel size. It combines high full-well capacity and zero crosstalk characteristics, delivering superior color fidelity. The 37.5dB signal-to-noise ratio ensures clearer images of surgical fields. OV6946 uses a traditional RGBC pixel architecture, which can meet basic imaging needs but has lower dynamic range and is prone to vertical stripe non-uniformity, requiring correction through ISP algorithms.
OCHTA10's low-light sensitivity reaches 3600mV/lux-sec, 3.6 times that of OV6946 (1000mV/lux-sec). It captures clearer images in low-light in-vivo environments, making it particularly suitable for deep tissue diagnosis. Additionally, OCHTA10 supports switching between multiple resolution and frame rate combinations, which can be adjusted to 400×400 (60fps), 600×600 (40fps), and other modes according to surgical needs, offering higher flexibility.
Through advanced manufacturing processes, OCHTA10 controls power consumption at 20mW, 20% lower than OV6946. This reduces patient discomfort caused by device heating during long surgeries and extends the battery life of portable equipment. Furthermore, OCHTA10 supports high-pressure sterilization, adapting to reusable endoscopic scenarios. Although OV6946 can achieve disinfection compatibility through supporting solutions, its original design does not explicitly enhance this feature.
OV6946 was launched earlier, boasting high technical maturity and obvious price advantages. It is the mainstream choice for mid-to-low-end endoscopic equipment, especially favored by cost-sensitive customers, with a market volume far exceeding the upgraded model. As an upgraded version of OVM6948, OCHTA10 targets the mid-to-high-end market. Despite its superior performance, its current market penetration rate is still lower than that of OV6946, mainly serving high-end medical device manufacturers.
Leveraging its advantages in miniaturization and high sensitivity, OCHTA10 is mainly applied in high-precision minimally invasive surgeries such as neurosurgery, cardiac intervention, and arthroscopy. It can reach narrow anatomical areas through ultra-thin catheters, aiding in early disease diagnosis. OV6946 is more suitable for conventional ultra-thin endoscopic scenarios, such as bile duct and pancreatic duct examinations, and pediatric patient diagnosis and treatment. Its mature supply chain and compatibility make it the preferred choice for mass-produced equipment.
If the equipment pursues extreme miniaturization, high imaging quality, or is used in high-difficulty minimally invasive surgeries, OCHTA10's performance advantages are more prominent. If cost control and rapid mass production are core needs without requiring extreme performance support, OV6946's maturity and cost-effectiveness are more competitive.
As medical technology continues to develop towards minimally invasive and precise directions, miniature image sensors like the OCHTA10 and OV6946 will become increasingly important. Although small, they are indispensable core components in modern medical imaging systems.
In the future, we can anticipate that medical image sensors will continue to develop towards smaller sizes, higher resolution, lower power consumption, and more functional integration, providing doctors with clearer "eyes" and bringing patients a treatment experience with less trauma.
