Infrared thermal imaging module

Abstract

The utility model belongs to the field of image correction technology, and discloses an infrared thermal imaging module, including a refrigeration core assembly and a lens; the infrared thermal imaging module also includes a baffle; the baffle is arranged in front of the refrigeration core assembly, or between the refrigeration core assembly and the lens; the baffle is provided with a low-reflection coating. The infrared thermal imaging module of the utility model adopts a baffle provided with a low-reflection coating to realize background correction or shutter correction, which can better improve the shadow of the central circular ring of the image; at the same time, the cost is low, the correction method is simple, and the setting is convenient; and the utility model can be adapted to refrigeration lenses of different focal lengths, has good versatility, and is particularly suitable for medium-wave refrigeration infrared thermal imaging modules with larger volumes.

Description

Technical Field

[0001] The utility model belongs to the technical field of image correction, and particularly relates to an infrared thermal imaging module. Background Art

[0002] With the continuous development of infrared thermal imaging technology, infrared technology has been widely used in many fields such as civil and military. However, due to the limitations of device materials and manufacturing processes, there are some differences between the detection units on the same focal plane array, resulting in obvious non-uniformity in infrared images. In addition, the non-uniformity of infrared images is also affected by changes in image scenes. In a cooled infrared imaging system, the non-uniformity of infrared images is also affected by changes in the temperature of the infrared focal plane array, which seriously reduces the imaging quality of the infrared system. Therefore, it is an important link in the infrared imaging system to correct the non-uniformity of infrared images and eliminate the influence of external factors on the stability of image quality as much as possible.

[0003] Methods for correcting infrared image non-uniformity include background correction, shutter correction, and correction without a baffle. Among them, background correction is to block a uniform surface in front of the movement during correction, so that the detector can collect radiation from the uniform surface and perform uniform processing on the detector focal plane array. Shutter correction is to add a baffle inside the infrared movement, which is similar to the principle of background correction, so that the detector focal plane array can collect radiation from the uniform surface of the baffle. The correction method without a baffle mainly uses software algorithms combined with real-time scenes to calibrate the detector focal plane array.

[0004] The existing correction methods have the following disadvantages: the shutter components of conventional background correction and shutter correction generally use simple baffles, which make it difficult to remove the shadow of the circular ring in the center of the image; and for larger infrared thermal imaging modules, such as medium-wave cooled infrared thermal imaging modules, the background correction method is not applicable considering the assembly and volume design; and the correction method without baffles has a complex software algorithm. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an infrared thermal imaging module, which can effectively improve the central ring shadow of the image.

[0006] The specific technical solutions are as follows:

[0007] An infrared thermal imaging module comprises a refrigeration core assembly and a lens; the infrared thermal imaging module also comprises a baffle; the baffle is arranged in front of the refrigeration core assembly or between the refrigeration core assembly and the lens; the baffle is provided with a low-reflection coating.

[0008] This solution performs special treatment on the baffle and sets a low-reflection coating, so that when imaging, the baffle reflects very little light, thereby greatly improving the uniformity of infrared image imaging and improving the shadow problem of the image. When the baffle is set before the refrigeration core assembly, background correction can be achieved; when the baffle is set between the refrigeration core assembly and the lens, shutter correction can be achieved.

[0009] Furthermore, the baffle is an aluminum profile provided with a low-reflection coating.

[0010] Furthermore, the low-reflection coating is a matte black coating with good low-reflection effect.

[0011] Furthermore, the infrared thermal imaging module is a medium-wave refrigeration infrared thermal imaging module, and the baffle is arranged between the refrigeration core assembly and the lens. For a medium-wave refrigeration infrared thermal imaging module with a large volume, the baffle with a low-reflection coating is arranged between the refrigeration core assembly and the lens, so as to achieve good imaging quality while minimizing the volume of the infrared thermal imaging module.

[0012] Furthermore, the baffle is fixed between the refrigeration core assembly and the lens through a fixing bracket.

[0013] Compared with the prior art, one or more of the above technical solutions can achieve at least one of the following beneficial effects:

[0014] The infrared thermal imaging module of the utility model adopts a baffle with a low-reflective coating to realize background correction or shutter correction, which can better improve the shadow of the circular ring in the center of the image; at the same time, the cost is low, the correction method is simple, and the setting is convenient; and the utility model can be adapted to cooling lenses of different focal lengths, has good versatility, and is particularly suitable for larger medium-wave cooling infrared thermal imaging modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the structure of the infrared thermal imaging module of Example 1.

[0017] Markings in the figure: 1. Refrigeration core assembly; 2. Baffle; 3. Focusing lens assembly; 4. Fixed bracket; 5. Base. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] This embodiment provides an infrared thermal imaging module, including a refrigeration core assembly, a lens, and a baffle; the baffle is provided with a low-reflection coating.

[0021] In a specific implementation, the baffle can be arranged in front of the refrigeration core assembly for background correction; or it can be arranged between the refrigeration core assembly and the lens for shutter correction.

[0022] In a specific implementation process, the baffle may be an aluminum profile provided with a low-reflection coating, which has a low cost.

[0023] As a preferred embodiment, the low-reflection coating is a matte black coating to improve the low-reflection effect. The surface of the baffle is matte and hardly reflects light. In a specific implementation, the surface treatment of the baffle can be an anodic matte black treatment.

[0024] The following takes the infrared thermal imaging module as a medium-wave cooling infrared thermal imaging module as an example. Figure 1 The medium-wave cooled infrared thermal imaging module shown is a medium-wave cooled infrared continuous zoom lens device, including a cooling core assembly 1, a baffle 2, a lens, a fixed bracket 4, a base 5 and other structures. The cooling core assembly 1 and the focusing lens assembly 3 of the lens are fixed on the base 5, and the baffle 2 is fixed between the cooling core assembly 1 and the focusing lens assembly 3 through the fixed bracket 4. The fixed bracket in this embodiment is L-shaped and connected to the base 5 by screws. The medium-wave cooled infrared continuous zoom lens device is usually large in size. By setting a baffle with a matte black coating between the cooling core assembly and the lens for shutter correction, the size of the medium-wave cooled infrared continuous zoom lens device can be avoided as much as possible while ensuring good imaging effect.

[0025] The working principle of this embodiment is as follows: in a cooling environment, light is projected onto the baffle, and the matte black coating on the baffle avoids light reflection as much as possible, so that the detector focal plane array collects uniform surface radiation of the baffle, improving the shadow of the central circular ring of the image to achieve a good imaging effect.

[0026] It can be understood that although this embodiment takes the medium-wave cooled infrared thermal imaging module as an example, other cooled infrared thermal imaging modules are also applicable.

[0027] Obviously, the above embodiments are merely examples for clearly illustrating the technical solution of the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection of the claims of the utility model.

Claims

1. An infrared thermal imaging module, comprising a refrigeration core assembly and a lens, characterized in that: The infrared thermal imaging module also includes a baffle; the baffle is arranged in front of the refrigeration core assembly, or between the refrigeration core assembly and the lens; the baffle is provided with a low-reflection coating.

2. The infrared thermal imaging module according to claim 1, characterized in that: The baffle is an aluminum profile provided with a low-reflection coating.

3. The infrared thermal imaging module according to claim 1, characterized in that: The low-reflective coating is a matte black coating.

4. The infrared thermal imaging module according to any one of claims 1 to 3, characterized in that: The infrared thermal imaging module is a medium-wave refrigeration infrared thermal imaging module, and the baffle is arranged between the refrigeration core component and the lens.

5. The infrared thermal imaging module according to claim 4, characterized in that: The baffle is fixed between the refrigeration core assembly and the lens through a fixing bracket.

Images