Open-Loop Image Control
Because of the current trend of decreasing pixel size to increase pixel count on CMOS imaging sensors, autofocus is becoming necessary to maximize the use of the sensor in its full-resolution capability over a wide depth of field. Hence, autofocus is being adopted as a standard feature in high-resolution imaging systems, typically those above 2 megapixels. As a result, new autofocus mechanisms are under development, including one using liquid lens technology.
An autofocus lens can focus on...
Photonics Spectra, November 2007