Opto electronic detector for automatic target tracking - comprises charge coupled device acting as sensor with diaphragm controlling incident light

摘要

The opto electronic detector is used to detect signals in various systems such as the automatic tracking of a target to determine its position. A change coupled device is used as the sensing element and the incident light is controlled for optimum performance to reduce weight and size. An objective lens (1) focusses the incident light onto a photosensitive detector (2) comprising a matrix of charge coupled devices. The detector output is applied to a preamplifier (4) for processing (3) for the particular application. The signal is also applied to a measuring circuit (7) whose output is compared (8) with a reference value (VR). The error is integrated (9) and summed (10) with an initial value (V OMEGA) to drive the motor (13) excitation coils (12). This motor drives the blades on a diaphragm (6) to increase or decrease the blanking effect on the incident light.