Coaxially arranged refrigeration infrared detector

Abstract

The utility model relates to the technical field of infrared detectors, in particular to a coaxially-arranged refrigeration infrared detector which comprises a base, a bottom plate is fixedly connected to the outer wall of one side of the bottom of the base, a mounting frame is fixedly connected to the outer wall of the top end of the bottom plate, a Stirling cryocooler is mounted on the inner wall of one side of the mounting frame, and the Stirling cryocooler is arranged on the inner wall of the other side of the mounting frame. A shell is fixedly connected to the outer wall of one side of the Stirling cryocooler, a cold finger is installed on the inner wall of the shell, a cold disc is installed on the outer wall of one side of the cold finger, an infrared chip is installed on the outer wall of one side of the cold disc, and a reinforcing frame is installed on the outer wall of the other side of the cold disc. According to the utility model, the problems that the refrigeration detection structure cannot be coaxially arranged, is large in size and wide in occupied area, is easily influenced by stray light and thermal interference, is long in refrigeration path, is low in heat exchange efficiency, and is poor in refrigeration effect are solved, the high vacuum degree in the Dewar assembly can be effectively maintained, the refrigeration effect is ensured, and the service life of the Dewar assembly is prolonged. And the use efficiency of the refrigeration infrared detector is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to infrared detector technical field, concretely is a coaxial arrangement's refrigeration infrared detector. BACKGROUND

[0002] When using under high and low temperature conditions, this process of resisting environment is relatively harsh, the influence of heat dissipation, metal thermal expansion and cold shrinkage on optics is relatively big, the heat dissipation performance of the traditional integral refrigeration infrared detector frame is difficult to guarantee, and secondly, when cooperating with optical lens, high machining precision is required, and if the heat dissipation measure is not in place under high temperature conditions, the system will have the problem of high temperature and cannot be used normally.

[0003] Through the search of the Chinese patent with the announcement number CN217687506U, an integral refrigeration infrared detector frame is disclosed, the base support is the mounting structure and the external interface structure of the integral assembly, and is processed as an integral molding structural member, which has superior strength, rigidity, stability, environmental resistance and other performances, the base support is the mounting structure of the detector, circuit board and other devices, facilitating the installation of the detector, circuit board and other devices, the heat sink is arranged at the chip and component with large heat dissipation in the circuit board, facilitating the heat dissipation of the chip and component, preventing damage caused by excessive heat, and the integral refrigeration infrared detector frame facilitates the installation of the refrigeration infrared detector, the strength of the structural member is guaranteed, the structural member precision is guaranteed, the heat dissipation is good, the integral refrigeration infrared detector frame can work normally under high temperature environment, the integral structure design guarantees the overall rigidity, and improves the natural frequency of the integral assembly.

[0004] Based on the above search and the existing technology, it is found that the above patent has certain defects, the refrigeration detection structure cannot be coaxially arranged, the volume is large, the area is wide, and the refrigeration detection structure is easily affected by stray light and heat interference, the refrigeration path is long, the heat exchange efficiency is low, the refrigeration effect is poor, the high vacuum degree inside the dewar assembly cannot be effectively maintained, the refrigeration effect is poor, and the use efficiency of the refrigeration infrared detector is reduced. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a coaxial arrangement's refrigeration infrared detector to solve the problems in the above background technology.

[0006] The utility model discloses a technical scheme is: a coaxial arrangement's refrigeration infrared detector, including base, the bottom one side outer wall fixedly connected with bottom plate of base, the top outer wall fixedly connected with mounting bracket of bottom plate, the inside wall of one side of mounting bracket is installed with stirling refrigerator, the outside wall fixedly connected with shell of one side of stirling refrigerator, the inside wall of shell is installed with cold finger, the outside wall of one side of cold finger is installed with cold plate, the outside wall of one side of cold plate is installed with infrared chip, the other side outer wall of cold plate is installed with reinforcing frame, the outside wall of one side of shell top is installed with ion pump, the inside wall fixedly connected with cold screen no.

[0007] Preferably, the outside wall of the window piece is provided with an anti-reflection coating, the space of the shell cover is a vacuum space, and the infrared chip is arranged inside the vacuum space.

[0008] Preferably, the outside wall of the shell is provided with a spacing layer, and the outside wall of the spacing layer is provided with a heat insulation layer.

[0009] Preferably, the spacing layer is made of glass fiber material, and the heat insulation layer is made of aluminum foil material.

[0010] Preferably, the inside wall of one side of the mounting bracket is provided with a driving plate, and the driving plate is connected with the infrared chip through a lead wire ring.

[0011] The utility model discloses a coaxial arrangement's refrigeration infrared detector, compared with the prior art, has the following improvements and advantages:

[0012] Firstly, the utility model discloses a base, mounting bracket, stirling refrigerator, cold finger, cold plate, infrared chip and ion pump are arranged along the same axis, compact structure, reduce the volume, coaxial arrangement effectively reduces stray light and thermal interference, improves the sensitivity and resolution of infrared detector, the refrigeration structure and infrared chip are closer, reduce refrigerant flow path, set up ion pump on the top of shell, maintain the high vacuum degree inside the dewar assembly through ionization and adsorption of gas molecules, solve the problem that the refrigeration detection structure cannot be coaxially arranged, the volume is large, occupies the area widely, is easily affected by stray light and thermal interference, because the refrigeration path is long, the heat exchange efficiency is low, and the refrigeration effect is poor, and the high vacuum degree inside the dewar assembly can be effectively maintained, the refrigeration effect is guaranteed, and the use efficiency of the refrigeration infrared detector is improved.

[0013] Secondly: the utility model discloses a cold screen one, cold screen two, window piece, heat insulation layer, interval layer and antireflection coating are seted up, and heat insulation layer and interval layer are seted up on the outer wall of shell, and the material quality of interval layer is glass fiber material, and the heat insulation layer is aluminum foil material, reduces heat conduction and radiation loss, improves the heat isolation effect of detector, and the setting of cold screen one and cold screen two adopts multilayer cold screen design, further reduces stray light and heat interference, sets up antireflection coating on window piece, further improves the transmittance of infrared radiation, improves the practicality of refrigeration infrared detector. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be explained further below in combination with the drawings and examples:

[0015] Figure 1 It is the overall structure section schematic diagram of the utility model;

[0016] Figure 2 It is the Figure 1 A structure amplification schematic diagram in the utility model;

[0017] Figure 3 It is the Figure 1 B structure amplification schematic diagram in the utility model.

[0018] Mark explanation:

[0019] 1, base plate;2, base plate;3, mounting frame;4, Stirling refrigeration machine;5, shell;6, cold finger;7, infrared chip;8, cold disc;9, reinforcing frame;10, window piece;11, heat insulation layer;12, interval layer;13, ion pump;14, cold screen one;15, cold screen two;16, antireflection coating. DETAILED DESCRIPTION

[0020] The utility model will be explained further below in combination with the drawings and examples:

[0021] The utility model discloses a coaxial arrangement's refrigeration infrared detector by improving, and the technical scheme of the utility model is:

[0022] As Figures 1-3As shown, a coaxial arrangement of a refrigeration infrared detector, including the base 1, one side of the bottom of the base 1 is fixedly connected with the bottom plate 2, the top end of the outer wall of the bottom plate 2 is fixedly connected with the mounting bracket 3, one side of the inner wall of the mounting bracket 3 is installed with the Stirling refrigerator 4, one side of the outer wall of the Stirling refrigerator 4 is fixedly connected with the shell 5, the inner wall of the shell 5 is installed with the cold finger 6, one side of the outer wall of the cold finger 6 is installed with the cold plate 8, one side of the outer wall of the cold plate 8 is installed with the infrared chip 7, the other side of the outer wall of the cold plate 8 is installed with the reinforcing frame 9, one side of the top of the outer wall of the shell 5 is installed with the ion pump 13, the inner wall of the reinforcing frame 9 is fixedly connected with the cold shield one 14, one side of the outer wall of the cold shield one 14 is fixedly connected with the cold shield two 15, one side of the outer wall of the cold shield two 15 is installed with the window sheet 10, the infrared chip 7, the cold plate 8, the window sheet 10, the cold shield one 14 and the cold shield two 15 are coaxially arranged.

[0023] Further, one side of the outer wall of the window sheet 10 is provided with an anti-reflection coating 16, the space covered by the shell 5 is a vacuum space, the infrared chip 7 is placed inside the vacuum space, the outer wall of the shell 5 is provided with a spacing layer 12, the outer wall of the spacing layer 12 is provided with a heat insulation layer 11, the cold shield one 14 and the cold shield two 15 are provided, a multi-layer cold shield design is adopted, further reducing stray light and thermal interference, the anti-reflection coating 16 is provided on the window sheet 10, further improving the transmittance of infrared radiation.

[0024] Further, the material of the spacing layer 12 is glass fiber material, the heat insulation layer 11 is aluminum foil material, one side of the inner wall of the mounting bracket 3 is installed with a driving board, the driving board is connected with the infrared chip 7 through a lead ring.

[0025] Working principle: when arranging the refrigeration infrared detector, the mounting bracket 3, the Stirling refrigerator 4, the shell 5, the cold finger 6, the infrared chip 7, the cold plate 8, the window sheet 10, the cold shield one 14 and the cold shield two 15 of the refrigeration infrared detector are coaxially arranged, arranged along the same axis, compact structure, reduce the volume, coaxial arrangement effectively reduces stray light and thermal interference, improves the sensitivity and resolution of the infrared detector, the refrigeration structure and the infrared chip 7 are closer, reduces the refrigerant flow path, the ion pump 13 is arranged on the top of the shell 5, ionizes and adsorbs gas molecules to maintain the high vacuum degree inside the Dewar assembly, the heat insulation layer 11 and the spacing layer 12 are arranged on the outer wall of the shell 5, the material of the spacing layer 12 is glass fiber material, the heat insulation layer 11 is aluminum foil material, reduces heat conduction and radiation loss, improves the thermal isolation effect of the detector, the cold shield one 14 and the cold shield two 15 are provided, a multi-layer cold shield design is adopted, further reducing stray light and thermal interference, the anti-reflection coating 16 is provided on the window sheet 10, further improving the transmittance of infrared radiation.

[0026] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above technical means, and also include technical schemes composed of equivalent replacement of the above technical features. The unfinished matters of the utility model belong to the common knowledge of the person skilled in the art.

Claims

1. A coaxially arranged cryogenic infrared detector comprising a base (1), characterized in that: The bottom of the base (1) is fixedly connected with a bottom plate (2), the top end of the outer wall of the bottom plate (2) is fixedly connected with a mounting rack (3), the inner wall of one side of the mounting rack (3) is mounted with a Stirling refrigerator (4), the outer wall of one side of the Stirling refrigerator (4) is fixedly connected with a shell (5), the inner wall of the shell (5) is mounted with a cold finger (6), the outer wall of one side of the cold finger (6) is mounted with a cold plate (8), the outer wall of one side of the cold plate (8) is mounted with an infrared chip (7), the outer wall of the other side of the cold plate (8) is mounted with a reinforcing frame (9), the outer wall of one side of the top of the shell (5) is mounted with an ion pump (13), the inner wall of the reinforcing frame (9) is fixedly connected with a cold screen one (14), the outer wall of one side of the cold screen one (14) is fixedly connected with a cold screen two (15), the outer wall of one side of the cold screen two (15) is mounted with a window piece (10), the infrared chip (7), the cold plate (8), the window piece (10), the cold screen one (14) and the cold screen two (15) are coaxially arranged.

2. A coaxially arranged cryogenic infrared detector according to claim 1, characterized in that: The outer wall of one side of the window piece (10) is provided with an anti-reflection coating (16), the space covered by the shell (5) is a vacuum space, and the infrared chip (7) is arranged in the vacuum space.

3. A coaxially arranged cryogenic infrared detector according to claim 1, characterized in that: The outer wall of the shell (5) is provided with a spacing layer (12), and the outer wall of the spacing layer (12) is provided with a heat insulation layer (11).

4. A coaxially arranged cryogenic infrared detector according to claim 3, characterized in that: The material of the spacing layer (12) is glass fiber material, and the heat insulation layer (11) is aluminum foil material.

5. A coaxially arranged cryogenic infrared detector according to claim 1, characterized in that: The inner wall of one side of the mounting rack (3) is mounted with a driving plate, and the driving plate is connected with the infrared chip (7) through a lead wire ring.

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