AMS is to create a camera 1mm across for space-constrained industrial and consumer designs, intending to add imaging to products such as smart toys and home appliances.
Inside is a multi-element lens, claimed to reduce distortion compared to similar cameras with a single-element lens. According to the firm the modulation transfer function (MTF) is >50% in the corners, distortion is <15% and color aberration is <1Px.
The interface is ‘single-ended interface mode’ (SEIM). “Like a standard SPI (serial peripheral interface), the SEIM channel is easy to implement in any host processor and provides a solution without the need for LVDS deserialisation,” said AMS. “The maximum frame rate over the SEIM interface is 58frame/s at a clock rate of 75MHz.”
The interface is configured as a slave, allowing the application to control frame rate, which can be slower than 1frame/s. By providing a central clock from the application processor, two or more cameras can be synchronised for eye tracking or stereo vision.
An idle mode reduces power consumption in applications such as presence detection need only a small number of frames per minute.