Developers of image sensors proceed their search to improve resolution, to permit merchandise such as security cameras to achieve better zoom range and accurate object identification and facial recognition. OmniVision Technologies, Inc. has declared the OS04A10, a 2.9-micron pixel image sensor with 4 megapixels (MP) resolution. The OS04A10 allows security cameras to take care of high efficiency in all lighting situations, in both the seen and NIR (near-infrared) wavelengths to develop precise color and monochrome images.
OmniVision’s Nyxel® NIR technology permits the sensor to achieve quantum effectivity (QE) of 60% at 850 nm and 40% at 940 nm, which is reportedly 3x to 5x higher than sensors without this know-how. This efficiency, in turn, allows using lower energy IR illumination in whole darkness, resulting in an estimated 3x reduction in system power consumption. The 940 nm NIR lighting can’t be detected by human eyes in dark indoor environment, whereas the 850 nm light is good for outside security cameras.
With the OS04A10, designers of security cameras that function in total darkness can cut back IR illumination to consume 2x to 4x much less power compared with the rivals’ sensors, for the same setting and over the same picture detection range. The amount of NIR light that a sensor needs to seize top quality pictures can be quantified with a metric referred to as NIR SNR1, which takes into account the QE (quantum effectivity), pixel resolution and read noise.
This image sensor is available in a small package deal with a sizeable 2.9-micron pixel resolution. This mix is advanced by OmniVision’s PureCel®-S die stacking technology, which separates the imaging array and the processing function into two layers to allow additional characteristics with a smaller die size.