Abstract: A rotatable disc comprises a first zone in which a plurality of features, e.g. optical filters, are located at uniform angles from each other with respect to an axis of rotation of the disc and a second annular zone comprising sets of adjacent marks of a first type and of a second type. Each set may have a same total circumferential length, but the marks of a given type may have at least two different total circumferential lengths within a set of marks, or may be distinguishable by the relative position of marks of the different type to each other. The adjacent marks of the first and the second type may also form a code pattern that can be used for identifying the features. A method for adjusting the rotational orientation of the disc based on detecting the widths of the sectors is described.

Abstract: In an electronic device printed circuit boards in a housing are kept parallel to each other by guiding means. One or a plurality of these printed circuit boards is connected with a housing part each on their corresponding edge by means of electronic plug-in connections. To secure the electronic plug-in connections, spring means are provided which exert pressure on opposite edges of the printed circuit boards in the direction of the plug-in connection.

Abstract: An image sensing device has an image cell with a photo-sensitive element, a detection node and an output pin. Charges accumulated during a first period of time are transferred from the photo-sensitive element to the detection node, thereby obtaining a first voltage, and kept on the detection node which is thus used as a memory. Some moments later, a first value corresponding to the first voltage is generated on the output pin, charges accumulated during a second period of time are transferred from the photo-sensitive element to the detection node, thereby obtaining a second voltage, and a second value is generated on the output pin corresponding to the second voltage. The signal thus generated is also proposed.

Abstract: After recording a data container, a back-pointer item is recorded, comprising a specific key and an indicator of the length of the data container. This back-pointer item can be used to jump to the beginning of the data container when reading the file backwards. Other types of coding than KLV coding are also proposed. These types of coding can be used for instance to code the back-pointer item.