Patent ID: 6141051
Filing Date: 2000-10-31
Classification: H04N

Abstract:
An electronic still camera comprising:a casing;a lens mounted on said casing, said lens defining a lens plane relative to said casing;at least a substantially planar two-dimensional opto-electric (O/E) transducer arrangement of opto-electric sensor elements mounted on said casing for receiving an image from said lens, said opto-electric transducer arrangement defining a focal plane and emitting output signals based on said received image;an image viewer screen in the form of an electro-optical (E/O) transducer to which at least a part of the output signals of said opto-electric sensor elements are communicated to provide an image thereon for viewing;means for adjustably mounting said image viewer screen on said casing; anda focus-judging unit, wherein outputs of said O/E-elements are operationally connected to said focus-judging unit, said focus-judging unit sequentially controlling mutual positioning of said lens and said O/E-transducer arrangement for two different mutual positions, and wherein said focus-judging device determines, in said two positions, gradients between output signals of adjacent O/E-elements or adjacent groups of O/E-elements and determines from said gradients at said two positions a desired mutual position of said lens and said O/E-transducer arrangement for a rated focus by interpolation or extrapolation, and wherein further said focus-judging unit controls subsequently said mutual positioning according to said mutual positioning for said rated focus.