Wide-spectrum hyperspectral imager with common view field

Abstract

The utility model discloses a common-field wide-spectrum hyperspectral imager, which comprises a first hyperspectral imager, a second hyperspectral imager and a visible light camera, and is characterized in that the first hyperspectral imager and the second hyperspectral imager are connected through an adjusting assembly to realize the spatial position adjustment of the second hyperspectral imager relative to the first hyperspectral imager; the visible light camera is connected with the first hyperspectral imager, the installation position of the visible light camera is the position with the view field range including the view field range of the first hyperspectral imager and the view field range of the second hyperspectral imager, and the first hyperspectral imager and the second hyperspectral imager are spectral imagers with different working wavebands. According to the high-resolution and high-sensitivity spectral imaging system, the high-spectral imaging instrument and the visible light camera are designed in a combined mode, the inherent limitation of a traditional high-spectral camera in the waveband coverage range is broken through, and high-resolution and high-sensitivity spectral imaging is successfully achieved in the broadband range.

Description

Technical Field

[0001] This utility model relates to the field of spectral technology, and more specifically, to a wide-band hyperspectral imager with a common field of view. Background Technology

[0002] Hyperspectral cameras, as key tools for acquiring rich spectral information, have wide applications in many fields. However, existing hyperspectral cameras have significant limitations in terms of spectral coverage, making it difficult to meet the urgent needs of ever-evolving scientific research and practical applications for wide-band hyperspectral imaging.

[0003] Currently, most hyperspectral cameras have relatively narrow spectral coverage, with common band ranges including 400nm to 1000nm, 900nm to 1700nm, and 900nm to 2500nm. However, with the deepening of scientific research and the expansion of practical applications—such as environmental monitoring requiring coverage from visible light to shortwave infrared for comprehensive analysis of water quality and atmospheric composition, and precision agriculture needing wide-band hyperspectral data to comprehensively assess crop growth and soil properties—there is an urgent need for hyperspectral cameras capable of covering a wider spectral range (e.g., 400nm to 2500nm or even wider) to meet these complex and diverse needs.

[0004] Achieving such broad spectral coverage using only a single camera presents numerous challenges. In terms of optical system design, finding materials with ideal optical performance across multiple spectral bands is difficult, and achieving clear imaging across the entire spectral range in the lens design is extremely challenging. Regarding the detector, the response range is insufficient for the demands of a wide spectral range, and balancing resolution and sensitivity is also difficult to achieve. Furthermore, cost control is a critical issue, as the special materials and high-performance components used to achieve a wide spectral range result in high manufacturing costs. Utility Model Content

[0005] To address the problems in related technologies, this invention proposes a wide-band hyperspectral imager with a common field of view, which solves the problems of narrow band coverage and high cost caused by the performance limitations of materials, lenses and detectors in current single wide-band hyperspectral imagers.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A wide-band hyperspectral imager with a shared field of view includes: a first hyperspectral imager, a second hyperspectral imager, and a visible light camera. The first and second hyperspectral imagers are connected by an adjustment component to achieve spatial position adjustment of the second hyperspectral imager relative to the first hyperspectral imager. The visible light camera is connected to the first hyperspectral imager, and the visible light camera is installed at a position where its field of view includes the field of view of both the first and second hyperspectral imagers. The first and second hyperspectral imagers are spectral imagers with different operating bands, and their operating bands are continuous and have overlapping bands. This application's combined design of the hyperspectral imager and the visible light camera not only cleverly overcomes the inherent limitations of traditional hyperspectral cameras in terms of band coverage, successfully achieving high-resolution and high-sensitivity spectral imaging over a wide band, but also demonstrates excellent cost control, with relatively low cost making it easier to promote and apply.

[0008] Furthermore, the adjustment components include: an axial rotation adjustment component, a horizontal rotation adjustment component, and an axial distance adjustment component. The axial rotation adjustment component, the horizontal rotation adjustment component, and the axial distance adjustment component are respectively connected to the first hyperspectral imager and the second hyperspectral imager. Before shooting, the relative spatial positions of the first hyperspectral imager and the second hyperspectral imager are adjusted by the axial rotation adjustment component, the horizontal rotation adjustment component, and the axial distance adjustment component, respectively, so that the second hyperspectral imager and the first hyperspectral imager share the same field of view.

[0009] Furthermore, the axial rotation adjustment component includes a first rotating ring and a second rotating ring. The first rotating ring is rotatably disposed relative to the second rotating ring. The second rotating ring is connected to a second hyperspectral imager, and the first rotating ring is connected to a first hyperspectral imager. The first rotating ring and the second rotating ring are limited by a limiting hole formed on the first rotating ring.

[0010] Furthermore, the horizontal rotation adjustment component includes a first connecting piece and a second connecting piece. The first connecting piece connects to the first hyperspectral imager, and the second connecting piece connects to the second hyperspectral imager. Both the first and second connecting pieces have corresponding horizontal connecting rotation holes, and are connected through these holes. When the second hyperspectral imager needs to be horizontally rotated, the first and second connecting pieces are rotated by a certain angle through the horizontal connecting rotation holes.

[0011] Furthermore, the axial distance adjusting component is a connector with a mounting groove and axial distance adjusting connection holes at each of its four corners. One end of the axial distance adjusting component is connected to the first hyperspectral imager. The second hyperspectral imager is mounted coplanarly with the first hyperspectral imager through the mounting groove. The first and second hyperspectral imagers are connected through the axial distance adjusting connection holes. When it is necessary to adjust the axial distance of a certain corner of the second hyperspectral imager, this is achieved by adding or removing shims between the axial distance adjusting connection hole and the connecting bolt.

[0012] Furthermore, the horizontal rotation adjustment component is connected to the first hyperspectral imager, the axial distance adjustment component is connected to the axial rotation adjustment component and the horizontal rotation adjustment component, and the axial rotation adjustment component is connected to the second hyperspectral imager.

[0013] Furthermore, the horizontal connecting rotating hole is an oval hole.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This application combines a hyperspectral imager and a visible light camera, which not only cleverly breaks through the inherent limitations of traditional hyperspectral cameras in terms of band coverage, but also successfully achieves high-resolution and high-sensitivity spectral imaging in a wide band range, but also performs well in terms of cost control. The relatively low cost makes it easier to promote and apply.

[0016] 2. This application achieves a shared field of view by combining a hyperspectral imager and a visible light camera through a unique adjustable structural design. This allows for precise imaging of the same scene without the need for additional mechanical devices such as sliding rails, significantly saving operation time and greatly improving work efficiency. These features make it particularly suitable for applications such as drones that require high timeliness and convenience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a wide-spectrum hyperspectral imager with a common field of view according to Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a wide-spectrum hyperspectral imager with a common field of view according to Embodiment 1 of this utility model;

[0020] Figure 3This is a schematic diagram of the axial rotation adjustment component of the common field-of-view broadband hyperspectral imager according to Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the horizontal rotation adjustment component of the wide-spectrum hyperspectral imager with a common field of view according to Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the axial distance adjustment component of a broadband hyperspectral imager with a common field of view according to Embodiment 1 of this utility model.

[0023] In the picture:

[0024] 1. First hyperspectral imager; 2. Second hyperspectral imager; 3. Visible light camera; 4. Axial rotation adjustment component; 41. First rotating ring; 411. Limiting hole; 42. Second rotating ring; 5. Horizontal rotation adjustment component; 51. First connecting piece; 52. Second connecting piece; 521. Horizontal connecting rotation hole; 6. Axial distance adjustment component; 62. Axial distance adjustment connecting hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] like Figure 1-5 As shown, a common-field broadband hyperspectral imager includes:

[0028] The system comprises a first hyperspectral imager 1, a second hyperspectral imager 2, and a visible light camera 3. The first hyperspectral imager 1 is connected to a housing, with its lens extending a certain distance beyond the housing. The second hyperspectral imager 2 and the visible light camera 3 are both housed within the housing. The visible light camera 3 is connected to the first hyperspectral imager 1, and its installation position is such that its field of view encompasses the field of view of both the first and second hyperspectral imagers 1 and 2. The first and second hyperspectral imagers 1 and 2 are spectral imagers operating in different wavelength bands. Their operating wavelength bands are continuous and overlap with each other, for example, 400nm-1000nm and 900nm-2500nm, respectively. When superimposed, they form a wavelength band of 400nm-2500nm.

[0029] The first hyperspectral imager 1 and the second hyperspectral imager 2 are connected by an adjustment assembly to adjust the spatial position of the second hyperspectral imager 2 relative to the first hyperspectral imager 1. The adjustment assembly includes an axial rotation adjustment component 4, a horizontal rotation adjustment component 5, and an axial distance adjustment component 6. The horizontal rotation adjustment component 5 is connected to the first hyperspectral imager 1, the axial distance adjustment component 6 is connected to the axial rotation adjustment component 4 and the horizontal rotation adjustment component 5, and the axial rotation adjustment component 4 is connected to the second hyperspectral imager 2. Before shooting, the spatial position of the second hyperspectral imager 2 is adjusted by the axial rotation adjustment component 4, the horizontal rotation adjustment component 5, and the axial distance adjustment component 6 respectively, so that the slits of the second hyperspectral imager 2 and the first hyperspectral imager 1 are located on the same plane, achieving a shared field of view between the two.

[0030] The axial rotation adjustment component 4 includes a first rotating ring 41 and a second rotating ring 42. The first rotating ring 41 is rotatably mounted relative to the second rotating ring 42. The second rotating ring 42 is connected to the second hyperspectral imager 2. The first rotating ring 41 is connected to the first hyperspectral imager 1 via a horizontal rotation adjustment component 5 and an axial distance adjustment component 6. The first rotating ring 41 and the second rotating ring 42 are limited by a limiting hole 411 formed on the first rotating ring 41. Rotating the first rotating ring 41 or the second rotating ring 42 to a designated position and then connecting and tightening the bolts in the corresponding limiting holes 411 will limit the movement.

[0031] The horizontal rotation adjustment component 5 includes a first connecting piece 51 and a second connecting piece 52. The first connecting piece 51 is connected to the first hyperspectral imager 1, and the second connecting piece 52 is connected to the second hyperspectral imager 2. Both the first connecting piece 51 and the second connecting piece 52 have corresponding horizontal connecting rotation holes 521. The horizontal connecting rotation holes 521 are oval holes, and the first connecting piece 51 and the second connecting piece 52 are connected through the horizontal connecting rotation holes 521. When it is necessary to horizontally rotate the second hyperspectral imager 2, the first connecting piece 51 and the second connecting piece 52 are rotated by a certain angle through the horizontal connecting rotation holes 521.

[0032] The axial distance adjusting component 6 is a connector with a mounting groove 61 and axial distance adjusting connection holes 62 at each of its four corners. One end of the axial distance adjusting component 6 is connected to the first hyperspectral imager 1 via a horizontal rotation adjusting component 5. The second hyperspectral imager 2 is mounted coplanarly with the first hyperspectral imager 1 via the mounting groove 61 and is connected to the first rotating ring 41. The first hyperspectral imager 1 and the second hyperspectral imager 2 are connected via the axial distance adjusting connection holes 62. When it is necessary to adjust the axial distance of a certain corner of the second hyperspectral imager 2, this is achieved by adding or removing shims between the axial distance adjusting connection holes 62 and the connecting bolts.

[0033] When using a common-field-of-view broadband hyperspectral imager, the casing is first fixed with the lens facing downwards. The sample to be measured is placed on a device that moves at a constant speed, such as a displacement stage or conveyor belt, or suspended on a drone and flew at a constant speed with the drone to achieve line scanning. During imaging, the first hyperspectral imager 1, the second hyperspectral imager 2, and the visible light camera 3 must be controlled synchronously for imaging. The visible light camera 3 captures an image at a 3-second interval, while the two hyperspectral imagers use the same parameter settings and frame rate (their acquisition frequency is much higher than that of the visible light camera) for synchronous imaging. After imaging, the data is preprocessed and stitched together for imaging.

[0034] It should be noted that during data processing, only the overlapping portions of the three camera fields of view are selected for stitching and fusion to ensure data consistency and accuracy.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A broadband hyperspectral imager with a common field of view, characterized in that, include: The system consists of a first hyperspectral imager (1), a second hyperspectral imager (2), and a visible light camera (3). The first hyperspectral imager (1) and the second hyperspectral imager (2) are connected by an adjustment component to achieve spatial position adjustment of the second hyperspectral imager (2) relative to the first hyperspectral imager (1). The visible light camera (3) is connected to the first hyperspectral imager (1). The installation position of the visible light camera (3) is such that its field of view includes the field of view of the first hyperspectral imager (1) and the second hyperspectral imager (2). The first hyperspectral imager (1) and the second hyperspectral imager (2) are spectral imagers with different working bands. Their working bands are continuous and there are overlapping bands between them. The adjustment components include: an axial rotation adjustment component (4), a horizontal rotation adjustment component (5), and an axial distance adjustment component (6), which are respectively connected to the first hyperspectral imager (1) and the second hyperspectral imager (2).

2. The broadband hyperspectral imager with a common field of view according to claim 1, characterized in that, The axial rotation adjustment component (4) includes a first rotating ring (41) and a second rotating ring (42). The first rotating ring (41) is rotatably set relative to the second rotating ring (42). The second rotating ring (42) is connected to the second hyperspectral imager (2), and the first rotating ring (41) is connected to the first hyperspectral imager (1). The first rotating ring (41) and the second rotating ring (42) are limited by a limiting hole (411) opened on the first rotating ring (41).

3. A broadband hyperspectral imager with a common field of view according to claim 1, characterized in that, The horizontal rotation adjustment component (5) includes a first connecting piece (51) and a second connecting piece (52). The first connecting piece (51) is connected to the first hyperspectral imager (1), and the second connecting piece (52) is connected to the second hyperspectral imager (2). The first connecting piece (51) and the second connecting piece (52) are each provided with a corresponding horizontal connecting rotation hole (521). The first connecting piece (51) and the second connecting piece (52) are connected through the horizontal connecting rotation hole (521).

4. A broadband hyperspectral imager with a common field of view according to claim 1, characterized in that, The axial distance adjustment component (6) is a connector with an installation groove (61) and axial distance adjustment connection holes (62) at its four corners. One end of the axial distance adjustment component (6) is connected to the first hyperspectral imager (1). The second hyperspectral imager (2) is installed coplanarly with the first hyperspectral imager (1) through the installation groove (61). The first hyperspectral imager (1) and the second hyperspectral imager (2) are connected through the axial distance adjustment connection holes (62).

5. A broadband hyperspectral imager with a common field of view according to claim 1, characterized in that, The horizontal rotation adjustment component (5) is connected to the first hyperspectral imager (1), the axial distance adjustment component (6) is connected to the axial rotation adjustment component (4) and the horizontal rotation adjustment component (5), and the axial rotation adjustment component (4) is connected to the second hyperspectral imager (2).

6. A broadband hyperspectral imager with a common field of view according to claim 3, characterized in that, The horizontal connecting rotating hole (521) is an oval hole.

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