Abstract: It is known to adjust the width/height ratio (aspect ratio) in charge coupled imaging devices in that a number of columns may or may not be used on either side of the imaging matrix. It is possible in this manner, for example, to reduce the aspect ratio to 4/3 starting from a device with an aspect ratio of 16/9 corresponding to a widescreen TV. Practice has shown that this reduction in the width impairs the quality of the imaging device in the 4/3 mode. According to an aspect of the invention, an FT device with an aspect ratio of 4/3 is used and operated as a 4-phase CCD in the 4/3 mode. To obtain the 16/9 aspect ratio, the height of the device is reduced in that selected lines are not used. For this purpose, the sensor matrix is operated as a 3-phase CCD, whereby the number of lines in vertical direction is increased.

Abstract: In a camera including an image sensor (4R, 4G, 4B) having a sampling frequency (fs), and an optical low-pass filter arrangement arranged in an optical path with the image sensor (4R, 4G, 4B), the optical low-pass filter arrangement comprises a first birefringent optical filter element having a frequency response with a frequency trap point at the sampling frequency (fs) of the image sensor (4R, 4G, 4B), and a second birefringent optical filter element having a frequency response with a first frequency trap point at two thirds of the sampling frequency (fs) of the image sensor (4R, 4G, 4B), and a second frequency trap point at twice the sampling frequency (fs) of the image sensor (4R, 4G, 4B).