H - Electricity – 04 – N
Patent
H - Electricity
04
N
95/55
H04N 5/232 (2006.01) G02B 7/34 (2006.01) G03B 13/34 (2006.01)
Patent
CA 1278719
ABSTRACT: "Camera for recording television, photographic or cinema- tographic images, including an automatic focus-setting device". A camera for recording television, photographic or cinematographic images includes an automatic focus- setting device. Information for this device is obtained with the aid of two optical paths having different path lengths present in an optical lens system placed in front of an opto-electronic sensor in the form of a charge transfer device comprising a pick-up member, a storage member and a shift register member. After a signal compar- ison of signals obtained during focus information recording periods the focus is set until an optimum signal correlation is the result. To realize a camera with both an undisturbed scene recording as an automatic focusing while using one and the same sensor for this purpose it operates consecut- ively during a television field period (TV) with a scene recording period (TVS), a scene information transfer period (TFV) for the transfer of information between the pick-up member and the storage member, at least one focus inform- ation recording period (TAS or TBS, respectively), the first and second optical paths being present in the op- tical lens system and a focus information transfer period (TFA or TFB, respectively) for the transfer of information between the pick-up member and the storage member. Another sequence may be: TVS, TFV, TAS, TFA, TBS and TFB. Figure 2.
529589
Izushi Munehisa
Jaspers Cornelis A.m.
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
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