| 摘要 |
<p>A range finder device (2170) and (2160) for use with a controller (2140) in an optical system (2100) is disclosed comprising a transmitter (2160) configured to produce a first beam of non-visible radiation for intersecting a perceived object, and a receiver (2170) configured to detect a second beam of non-visible radiation reflected from the perceived object, the controller (2140) configured to determine a viewing distance of the perceived object based on signals received from the transmitter (2160) and receiver (2170). A method of controlling an optical lens is disclosed comprising utilizing a range finder to determine the viewing distance of an object perceived through an electro-active lens (2120). An optical lens system (2100) is disclosed, comprising an electro-active lens (2120) and a controller (2140) coupled to the lens configured to adjust a focal length of at least a portion of the electro-active lens (2120) based on a signal from a range finder device.</p> |
