Pixel structure for refrigeration type second-class superlattice infrared detector

Abstract

The utility model provides a pixel structure for a refrigeration type second-class superlattice infrared detector, and belongs to the technical field of infrared detectors. The problem that focal plane array arrangement of an existing refrigeration type second-class superlattice infrared detector affects imaging uniformity is solved. Comprising a plurality of rows of imaging units which are staggered up and down at equal intervals, each row of imaging units comprises a plurality of detection elements which are arranged at equal intervals, upper electrodes are arranged on the detection elements, lower electrodes are arranged at the central positions of every two adjacent detection elements in the upper row and the lower row which are staggered, and the lower electrodes in the upper row and the lower row are also staggered. The distances between the upper electrodes and the lower electrodes are consistent; the refrigeration type second-class superlattice infrared detector is applied to refrigeration type second-class superlattice infrared detectors.

Description

Technical Field

[0001] The utility model provides a pixel structure for a refrigeration type second-class superlattice infrared detector, belonging to the technical field of infrared detectors. Background Art

[0002] The cooled type II superlattice infrared detector is one of the most cutting-edge cooled infrared detector technologies in the infrared thermal imaging industry. It can be used to detect complex backgrounds and monitor high-speed moving targets.

[0003] The focal plane array design of the existing cooled type II superlattice infrared detector adopts an arrangement mode in which the positive electrode and the common lower electrode area are isolated, wherein the positive electrode detection elements are evenly spaced to form a rectangular array of NxM detection elements 001, and the common lower electrode 003 surrounds the rectangular array to form a ring structure, such as Figure 1 As shown, such an arrangement causes a difference in distance between the upper electrode 002 and the common lower electrode 003 of different detection elements 001 from the periphery to the center, and the voltage difference between the upper and lower electrodes of two detection elements 001 with large position differences will also be different, directly affecting the imaging uniformity of the detector. Utility Model Content

[0004] In order to solve the problem that the focal plane array arrangement of the existing refrigerated type II superlattice infrared detector affects the imaging uniformity, the utility model proposes a pixel structure for a refrigerated type II superlattice infrared detector, the purpose of which is to improve the arrangement structure of the detection element so that the distance between the upper electrode and the lower electrode is consistent.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pixel structure for a refrigerated type II superlattice infrared detector, comprising a plurality of rows of imaging units arranged in an upper and lower staggered and evenly spaced arrangement, each row of imaging units comprising a plurality of equally spaced detection elements, an upper electrode being arranged on the detection element, a lower electrode being arranged at the center position of every two adjacent detection elements in the staggered upper and lower rows, and the lower electrodes in the upper and lower rows are also staggered so that the distance between each upper electrode and the lower electrode is consistent.

[0006] The upper electrode is located at the center of the detection element.

[0007] The detection element is in the shape of a regular polygon or a circle.

[0008] The detection element is in the shape of a regular hexagon.

[0009] Three adjacent detection elements arranged alternately in the upper and lower rows form an equilateral triangle.

[0010] The upper electrode and the lower electrode are in the shape of regular polygon or circle.

[0011] The upper electrode and the lower electrode are circular in shape.

[0012] The beneficial effects of the present invention compared to the prior art are as follows: the pixel structure of the cooling type II superlattice infrared detector provided by the present invention ensures that the distance between each upper electrode and the lower electrode on the imaging plane of the infrared detector is equal through the staggered arrangement of detection elements and the lower electrode arranged between the staggered detection elements, and no distance difference occurs, thereby improving the imaging uniformity of the cooling type II superlattice infrared detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the pixel structure of the existing refrigerated type II superlattice infrared detector;

[0015] Figure 2 This is a pixel structure diagram of the refrigerated type II superlattice infrared detector proposed by the utility model;

[0016] In the figure: 001 is the detection element, 002 is the upper electrode, and 003 is the lower electrode. DETAILED DESCRIPTION

[0017] like Figure 2 As shown, the utility model provides a pixel structure that can improve the imaging uniformity of the cooling type II superlattice infrared detector, and improves the imaging uniformity of the infrared detector by designing the distribution mode of the upper electrode 002 and the lower electrode 003 of the detection element 001. It includes a plurality of rows of staggered imaging units, each of which includes a plurality of equally spaced detection elements 001, each of which is provided with an upper electrode 002, and the upper electrode 002 is located at the center of the detection element 001. The arrangement of the detection elements 001 is as follows: the first row has m detection elements 001 arranged at equal intervals, the second row has m-1 detection elements 001 arranged at equal intervals, and the detection element 001 in the second row is located between two adjacent detection elements 001 in the first row, forming a staggered arrangement. The third, fifth, and 2n-1 (n=1...) rows all have m detection elements 001 arranged at equal intervals, and their arrangement positions are parallel to and one-to-one correspond to the detection elements 001 in the first row; the fourth, sixth, and 2n rows all have m-1 detection elements 001 arranged at equal intervals, and their arrangement positions are parallel to and one-to-one correspond to the detection elements 001 in the second row. The spacing between two detection elements 001 in each row is the same. The spacing between detection elements 001 in every two rows is also the same. According to the above arrangement, an array of staggered detection elements 001 is formed.

[0018] The lower electrodes 003 are arranged at equal intervals between adjacent detection elements 001 in two rows, ensuring that the upper electrodes 002 and lower electrodes 003 of different detection elements 001 have the same distance. The lower electrodes 003 between the two rows are also arranged in a staggered manner, and the number and interval of the lower electrodes 003 in the first row are consistent with the number and interval of the detection elements 001 in the second row, and the number and interval of the lower electrodes 003 in the second row are consistent with the number and interval of the detection elements 001 in the third row.

[0019] According to the above arrangement rules, two rows of staggered detection elements 001 are formed, and a row of lower electrodes 003 is set between every two rows of detection elements 001, and the lower electrodes 003 in the two rows also form a staggered arrangement. Two adjacent detection elements 001 in the first row and one detection element 001 in the second row adjacent to it form an equilateral triangle, and the lower electrode 003 in the first row is located at the center of the corresponding equilateral triangle; one lower electrode 003 in the first row and two adjacent lower electrodes 003 in the second row also form an equilateral triangle, and the detection element 001 in the second row is located at the center of the corresponding equilateral triangle. According to the above arrangement rules, the detection elements 001 and the lower electrodes 003 in the remaining rows are arranged in sequence to obtain a pixel arrangement structure with high imaging uniformity.

[0020] The utility model modifies the arrangement between the upper electrode 002 and the lower electrode 003 of the detection element 001, thereby ensuring that the distance between each upper electrode 002 and multiple adjacent lower electrodes 003 on the detector is the same, thereby ensuring the imaging uniformity of the infrared detector.

[0021] There is no limitation on the shapes of the detection element 001, the upper electrode 002 and the lower electrode 003. Figure 2 The shapes of the detection element 001 of the regular hexagon and the upper electrode 002 and the lower electrode 003 of the circular shape can be limited to this in actual use, as long as the distance between each upper electrode 002 and its adjacent multiple lower electrodes 003 is consistent.

[0022] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pixel structure for a refrigerated type II superlattice infrared detector, characterized in that: The invention comprises a plurality of rows of imaging units arranged in an upper and lower staggered manner at equal intervals, each row of imaging units comprises a plurality of detection elements (001) arranged at equal intervals, an upper electrode (002) is arranged on the detection element (001), a lower electrode (003) is arranged at the center position of every two adjacent detection elements (001) in the upper and lower rows of the staggered arrangement, and the lower electrodes (003) in the upper and lower rows are also staggered so that the distance between each upper electrode (002) and the lower electrode (003) is consistent.

2. The pixel structure for a refrigerated type II superlattice infrared detector according to claim 1, characterized in that: The upper electrode (002) is located at the center of the detection element (001).

3. The pixel structure for a refrigerated type II superlattice infrared detector according to claim 2, characterized in that: The detection element (001) is in the shape of a regular polygon or a circle.

4. The pixel structure for a refrigerated type II superlattice infrared detector according to claim 3, characterized in that: The detection element (001) is in the shape of a regular hexagon.

5. The pixel structure for a refrigerated type II superlattice infrared detector according to claim 1, characterized in that: Three adjacent detection elements (001) arranged alternately in the upper and lower rows form an equilateral triangle.

6. The pixel structure for a refrigerated type II superlattice infrared detector according to claim 1, characterized in that: The upper electrode (002) and the lower electrode (003) are in the shape of a regular polygon or a circle.

7. The pixel structure for a refrigerated type II superlattice infrared detector according to claim 6, characterized in that: The upper electrode (002) and the lower electrode (003) are circular in shape.

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