An optical detection system and method capable of range imaging and mapping

Abstract

The application relates to the technical field of optical detection equipment, and particularly discloses an optical detection system and a detection method capable of realizing image formation and ranging, wherein the optical detection system comprises a light collection system, a laser ranging system, an infrared imaging system and a moving reflection component; the moving reflection component is located between the light collection system and the infrared imaging system and performs motion into or out of the light path formed by the light collection system and the infrared imaging system; and the detection method comprises the following steps: a visible light imaging system and an infrared imaging system perform target searching and identification; after the target is identified, the moving mirror moves into the light path; the moving mirror reflects light to the laser ranging system to perform ranging and obtain distance information; and after the ranging is completed, the moving mirror is separated from the light path; the application can effectively realize visible light and infrared band imaging and can simultaneously realize ranging with high ranging precision; the structure is simple and practical.

Description

Technical Field

[0001] This invention relates to the field of optical detection equipment technology, and more specifically, to an optical detection system and detection method capable of achieving graphic imaging and distance measurement. Background Technology

[0002] In military and other fields, it is necessary to use visible light imaging during the day and infrared imaging at night to search for targets. After a target is detected, it is necessary to quickly measure its distance to obtain the target's location information.

[0003] Existing technologies primarily use separate units to achieve the above requirements, meaning that visible light and infrared imaging and ranging functions are each executed by three independent modules. This technical solution directly uses existing imaging and ranging function modules, but it mainly suffers from the following problems:

[0004] 1. The system has low integration and is bulky;

[0005] 2. The precise positional relationships between modules require accurate calibration;

[0006] 3. Once the target image is confirmed, it is difficult to immediately measure its distance. Generally, necessary movement is required so that the laser rangefinder can aim at the target. However, this operation is difficult to complete for moving targets. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an optical detection system and detection method capable of realizing image imaging and ranging; capable of effectively realizing imaging in the visible light and infrared bands, and simultaneously realizing ranging with high ranging accuracy; simple structure and strong practicality;

[0008] The solution adopted by this invention to solve the technical problem is:

[0009] on the one hand:

[0010] An optical detection system capable of image imaging and ranging includes a light collection system for target light collection, a laser ranging system, an infrared imaging system, and a moving reflective component;

[0011] The movable reflective component is located between the light collection system and the infrared imaging system and moves into or out of the light path formed by the light collection system and the infrared imaging system.

[0012] In some possible implementations,

[0013] It also includes a dichroic mirror located between the moving reflector and the light collection system, as well as a visible light imaging system.

[0014] In some possible implementations,

[0015] The movable reflective component is a movable reflector.

[0016] In some possible implementations,

[0017] The light collection system, dichroic mirror, and infrared imaging system are arranged coaxially.

[0018] In some possible implementations,

[0019] The light-collecting system is a telescope system.

[0020] In some possible implementations,

[0021] The infrared imaging system is equipped with an imaging lens.

[0022] In some possible implementations,

[0023] The visible light imaging system is equipped with an imaging lens two.

[0024] In some possible implementations,

[0025] The center point of the telescope system and the axis of the dichroic mirror are on the same straight line.

[0026] on the other hand:

[0027] A detection method for an optical detection system capable of image imaging and ranging specifically includes the following steps:

[0028] Step S1: The visible light imaging system and the infrared imaging system perform target search and identification;

[0029] Step S2: After the target is identified, the moving reflector moves into the optical path and enters the optical path; the moving reflector reflects the light to the laser ranging system for ranging and obtains distance information;

[0030] Step S3: After the ranging is completed, move the reflector away from the optical path.

[0031] In some possible implementations,

[0032] Step S1 specifically refers to:

[0033] The light collection system collects the target light source, guides the light source through a dichroic mirror, and reflects the visible band of the target light source to the visible light imaging system for visible light imaging. At the same time, the dichroic mirror guides the infrared and higher bands of the target light source to enter the infrared imaging system for target recognition imaging.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] Compared with the prior art, the present invention can effectively realize visible light imaging and infrared band imaging, and can realize distance measurement after molding;

[0036] This invention places a movable reflector between a dichroic mirror and an infrared imaging system. The dichroic mirror guides the infrared and higher wavelength bands to achieve infrared imaging. When measuring distance, a long wavelength frequency that overlaps with the infrared band is selected for measurement, thereby effectively improving the penetration ability of the ranging laser in weather conditions such as rain and fog, resulting in higher ranging accuracy.

[0037] Compared with the prior art, the present invention has a simple structure, small size and strong practicality. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention;

[0039] The components include: 1. Light collection system; 2. Visible light imaging system; 3. Laser ranging system; 4. Infrared imaging system; 5. Moving reflector; 6. Dichroic mirror. Detailed Implementation

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The present invention will now be described in detail.

[0042] like Figure 1 As shown,

[0043] on the one hand:

[0044] An optical detection system capable of image imaging and ranging includes a light collection system 1 for collecting target light, a laser ranging system 3, an infrared imaging system 4, and a moving reflective component 5;

[0045] The movable reflective component 5 is located between the light collection system 1 and the infrared imaging system 4 and moves in a straight line towards or away from the laser ranging system 3.

[0046] The light collection system 1, the movable reflection component 5, and the laser ranging system 3 form a ranging optical path;

[0047] The light collection system 1 and the infrared imaging system 4 form an imaging optical path.

[0048] In use, the light collection system 1 collects the light source and projects it into the infrared imaging system 4 for imaging, thereby enabling the search and identification of the target. After the target identification is completed, the moving reflector 5 moves towards the first optical path and the light collected by the light collection system 1 enters the moving reflector 5, and is then projected into the laser ranging system 3 for ranging. At this time, the infrared imaging system 4 stops imaging, and the laser ranging system 3 measures the distance for a very short time, about 1 second, and then moves away. The infrared imaging system 4 will then continue to search for and identify the target.

[0049] In some possible implementations, this is to enable imaging of visible light and to perform ranging after imaging by the visible light system;

[0050] It also includes a dichroic mirror 6 located between the movable reflective component 5 and the light collection system 1, and a visible light imaging system 2; the light collection system 1, the dichroic mirror 6, and the visible light imaging system 2 form an imaging optical path two.

[0051] After the light collection system 1 collects the light source, the dichroic mirror 6 guides the light. Visible light enters the visible light imaging system 2 for imaging. Infrared light and higher wavelengths that pass through the dichroic mirror 6 enter the infrared imaging system 4 for infrared imaging. After imaging is completed (i.e., after target recognition), the moving reflector 5 moves between the dichroic mirror 6 and the infrared imaging system 4. At this time, the axis of the dichroic mirror 6 and the axis of the moving reflector 5 are coaxial, reflecting infrared light and higher wavelengths to the laser ranging system 3 for ranging. After ranging is completed, the moving reflector 5 moves away from its position during ranging, allowing the infrared imaging system 4 to continue imaging.

[0052] It should be noted that when used during the day, visible light imaging will be used as the primary imaging system; infrared imaging system 4 will serve as an auxiliary imaging system.

[0053] When used at night, the infrared imaging system 4 will be used as the primary imaging system, while visible light imaging will assist in imaging.

[0054] When performing distance measurement, the laser ranging system 3 uses long-wavelength frequency light with overlapping infrared bands for distance measurement, which enables effective distance measurement even in rainy and foggy weather conditions, and also provides higher distance measurement accuracy.

[0055] This invention uses a reflector, by setting a movable reflector to enter or exit the optical path formed by the dichroic mirror and the infrared imaging system, so that the selection of the ranging laser wavelength is not limited and can completely overlap with the infrared imaging band.

[0056] In some possible implementations, in order to effectively reflect the light transmitted through the dichroic mirror 6 to the laser ranging system 3;

[0057] The movable reflective component 5 is a movable reflector.

[0058] In some possible implementations,

[0059] The light collection system 1, the dichroic mirror 6, and the infrared imaging system 4 are arranged coaxially.

[0060] In some possible implementations, in order to effectively collect the target light source;

[0061] The light collection system 1 is a telescope system.

[0062] In some possible implementations, in order to effectively achieve imaging;

[0063] The infrared imaging system 4 is equipped with an imaging lens.

[0064] In some possible implementations,

[0065] The visible light imaging system 2 is equipped with an imaging lens 2.

[0066] In some possible implementations,

[0067] The center point of the telescope system and the axis of the dichroic mirror 6 are on the same straight line.

[0068] on the other hand:

[0069] A detection method for an optical detection system capable of image imaging and ranging specifically includes the following steps:

[0070] Step S1: Visible light imaging system 2 and infrared imaging system 4 perform target search and identification;

[0071] Step S1 specifically refers to:

[0072] The light collection system 1 collects the target light source, guides the light source through the dichroic mirror 6, and reflects the visible band of the target light source to the visible light imaging system 2 for visible light imaging; at the same time, the dichroic mirror 6 guides the infrared and higher bands of the target light source, so that the infrared and higher bands enter the infrared imaging system 4 for target recognition imaging.

[0073] Step S2: After the target is identified, the moving reflector moves towards the light path formed by the dichroic mirror and the infrared imaging system, and is positioned between the infrared imaging system 4 and the dichroic mirror 6. At this time, the axis of the moving reflector and the axis of the dichroic mirror 6 will be on the same straight line. The moving reflector will reflect infrared and higher wavelength light to the laser ranging system 3 for ranging and obtain distance information.

[0074] Step S3: After the ranging is completed, the moving reflector is separated from the light path formed by the dichroic mirror and the infrared imaging system. The infrared imaging system 4 will continue to receive the light transmitted through the dichroic mirror 6 and continue to perform imaging.

[0075] This invention integrates visible light, infrared light imaging, and laser ranging functions without the need for additional calibration. It has a simple structure, separating the visible light and infrared bands through a dichroic mirror 6 and a moving reflector. Furthermore, the laser ranging system 3 uses a long wavelength frequency that overlaps with the infrared band for measurement, which improves the penetration ability of the ranging laser under weather conditions such as rain and fog, making the ranging more accurate.

[0076] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. An optical detection system capable of image imaging and ranging, characterized in that, It includes a light collection system for collecting target light, a laser ranging system, an infrared imaging system, a moving reflector, a dichroic mirror located between the moving reflector and the light collection system, and a visible light imaging system; The movable reflective component is located between the light collection system and the infrared imaging system and moves into or out of the light path formed by the light collection system and the infrared imaging system; The light collection system, dichroic mirror, and infrared imaging system are coaxially arranged. After the light-collecting system collects the light source, a dichroic mirror guides the light. Visible light enters the visible light imaging system for imaging; infrared light and higher wavelengths passing through the dichroic mirror enter the infrared imaging system for infrared imaging. After imaging is complete, a moving reflector moves between the dichroic mirror and the infrared imaging system. At this point, the axis of the dichroic mirror and the axis of the moving reflector are coaxial, reflecting infrared light and higher wavelengths to the laser ranging system for distance measurement. After ranging is completed, the moving reflector moves away from its position during ranging, allowing the infrared imaging system to continue imaging. When performing distance measurement, the laser ranging system uses long-wavelength frequency light with overlapping infrared bands for distance measurement.

2. The optical detection system capable of image imaging and ranging according to claim 1, characterized in that, The movable reflective component is a movable reflector.

3. The optical detection system capable of image imaging and ranging according to claim 1, characterized in that, The light-collecting system is a telescope system.

4. The optical detection system capable of image imaging and ranging according to claim 1, characterized in that, The infrared imaging system is equipped with an imaging lens.

5. An optical detection system capable of image imaging and ranging according to claim 1, characterized in that, The visible light imaging system is equipped with an imaging lens two.

6. An optical detection system capable of image imaging and ranging according to claim 3, characterized in that, The center point of the telescope system and the axis of the dichroic mirror are on the same straight line.

7. A detection method for an optical detection system capable of image imaging and ranging according to any one of claims 1-6, characterized in that, Specifically, the following steps are included: Step S1: The visible light imaging system and the infrared imaging system are used to search for and identify the target; Step S2: After the target is identified, the moving reflector moves into the optical path and enters the optical path; the moving reflector reflects the light to the laser ranging system for ranging and obtains distance information; Step S3: After the ranging is completed, move the reflector away from the optical path.

8. The detection method of an optical detection system capable of image imaging and ranging according to claim 7, characterized in that, Step S1 specifically refers to: The light collection system collects the target light source, guides the light source through a dichroic mirror, and reflects the visible band of the target light source to the visible light imaging system for visible light imaging. At the same time, the dichroic mirror guides the infrared and higher bands of the target light source to enter the infrared imaging system for target recognition imaging.

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