OmniVision Technologies, Inc., a developer of advanced digital imaging solutions, has announced the OS04A10, a 2.9 micron pixel image sensor with 4 megapixel (MP) resolution, the latest addition to its growing family of Nyxel near-infrared (NIR) and ultra-low light (ULL) sensors. The OS04A10 provides security cameras with greater zoom range and AI-enabled surveillance systems with better object identification and facial authentication accuracy. It provides these enhancements while maintaining the industry’s best performance, day and night, for detecting incident light in both the visible and NIR wavelengths to produce even more precise color and monochrome images.
OmniVision’s Nyxel NIR technology imparts the OS04A10 with exceptional quantum efficiency (QE) of 60% at 850nm and 40% at 940nm, which is 3x to 5x better than sensors without this technology. This QE enables the use of lower power IR illumination in total darkness, resulting in an estimated 3x reduction in system-level power consumption. The 940nm NIR lighting cannot be detected by human eyes in dark indoor settings, while the 850nm light is suitable for outdoor security cameras. The OS04A10’s ability to capture crisp, clear images using undetectable 940nm NIR light means indoor security cameras will not disturb sleeping occupants and can be easily concealed from intruders.
The amount of NIR light that a sensor requires to capture high quality images can be quantified with a new metric called NIR SNR1, which takes into account the QE, pixel size and read noise. The OS04A10 achieves industry leading SNR1850nm and SNR1940nm performance, which is 2x to 3x smaller when compared with the leading known available competitor sensors. With the OS04A10, designers of security cameras that operate in total darkness can reduce IR illumination to consume 2x to 4x less power when compared with the competitors’ sensors, for the same environment and over the same image detection range.
The OS04A10 achieves the industry’s lowest SNR1 while producing 4 MP and 1080p images for video recording. Additionally, OmniVision’s integrated dual-conversion-gain technology provides the industry’s best ULL and high dynamic range (HDR) performance, along with greater flexibility in selecting a companion image signal processor. The 3-frame staggered shutter also minimizes motion artifacts and enables an HDR of 120 dB.
This image sensor is available in an extremely small package with a large 2.9 micron pixel size. This combination is enabled by OmniVision’s PureCel-S die stacking technology, which separates the imaging array and the processing function into two layers to enable additional features with a smaller die size. The PureCel-S technology also reduces power consumption. This results in smaller camera modules with greater design flexibility.