Non-refrigeration infrared focal plane array

Abstract

The invention provides a non-refrigeration infrared focal plane array. The non-refrigeration infrared focal plane array comprises a detector array and read-out circuits, wherein the detector array comprises pixel unit circuits arranged in an array mode; the pixel unit circuits in each line are at least electrically connected with the pixel unit circuits in one line of an upper line and a next line; the read-out circuits are used for reading the data of the pixel unit circuits, wherein at least a half line number of the pixel unit circuits in each column are connected to a first read-out circuit, and the rest line number of the pixel unit circuits are connected to a second read-out circuit; and when the data of the pixel unit circuits is read, the data in one line of the pixel unit circuitsconnected to the first read-out circuit and the data in one line of the pixel unit circuits connected to the second read-out circuit are read at the same time. According to the non-refrigeration infrared focal plane array provided by the invention, a selection switch is ingeniously designed, so that it is guaranteed that two rows of pixel unit circuits can be selected at the same time and can work independently, mutual interference is avoided, the data of two lines of pixel unit circuits can be read at the same time, the integral time and the line time are doubled, and the NETD of the detector is remarkably reduced, thereby satisfying the requirements of large array, high frame frequency and high-performance applications.

Description

technical field [0001] The invention relates to the technical field of infrared imaging, in particular to an uncooled infrared focal plane array. Background technique [0002] At present, uncooled infrared imaging technology has important applications in military, industrial and agricultural, medical, astronomical and other fields. As the core of the uncooled infrared imaging technology, the infrared focal plane array includes two parts: an infrared detector array and a readout circuit. Among them, the microbolometer focal plane array (Focal Plane Array, referred to as FPA) has high sensitivity and is the most widely used uncooled infrared focal plane array. Its working principle is that the heat-sensitive material absorbs the incident infrared radiation After the temperature changes, it causes the change of its own resistance value, and detects the size of the infrared radiation signal by measuring the change of its resistance value. [0003] Microbolometers generally ado...

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