Portable visible and infrared dual-band high-contrast optical target simulator

Abstract

The utility model discloses a portable visible and infrared dual-band high-contrast optical target simulator, and relates to the technical field of optical detection. An optical target simulator used for detecting the performance of a visible light telescope is not suitable for detecting the performance of optical instruments such as a thermal imaging telescope and a visible and infrared image fusion telescope. The utility model discloses a target simulator capable of carrying out visual angle magnification detection on optical instruments such as a thermal imaging telescope, a visible and infrared image fusion telescope and the like. Visible light and thermal infrared dual-band simulation target patterns with a plurality of point and line targets are formed through a rotating arm structure. And the direction of the simulator is corrected by using the through hole and the aiming cross. The small size can be formed through the rotating arm structure, and storage and carrying are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of optical detection, in particular to a target simulator that can be used for performance detection of thermal imaging telescopes and visible and infrared image fusion telescopes. Background Art

[0002] Field of view magnification is a fundamental optical parameter and key technical indicator for all telescope optical systems. There are two established methods for measuring the field of view magnification of traditional visible light telescopes. One is to directly measure the object-image angular ratio, typically achieved using a special theodolite; the other is to measure the object-image size ratio at the entrance and exit pupils, typically using a specialized magnifier. Neither method is suitable for measuring the field of view magnification of thermal imaging telescopes or telescopes that fuse visible and infrared images. Summary of the Invention

[0003] In view of this, the main purpose of the present invention is to provide an optical target simulator suitable for testing the performance of telescopic optical instruments such as thermal imaging telescopes and visible and infrared image fusion telescopes, such as viewing angle magnification.

[0004] The utility model provides a portable, high-contrast, dual-band visible and infrared optical target simulator comprising a base 1, a rotating arm 2, and an aligner 3. Multiple rotating arms 2 are mounted on the sides of the base 1, and the aligner 3 is mounted at the center of one end of the base 1. The rotating arms 2 are tilted outward to a limited position, perpendicular to the aligner 3, and present a planar, expanded, maximum surface area, serving as a target pattern for observation and aiming with telescopic optical instruments. The rotating arms 2 are tilted inward to abut against the sides of the aligner 3, resulting in a substantially cylindrical, minimum volume overall for easy storage or portability.

[0005] Preferably, the base 1 is an approximately octagonal, axisymmetric structure with a circular through-hole cut out along its center. Four of the sides of the base 1 have mounting notches, symmetrically spaced two by two, for mounting four sets of rotating arms 2. One side has a universal tripod mount, allowing for height and directional adjustment using a tripod.

[0006] Preferably, the rotating arm 2 is a square tubular structure made of a highly thermally conductive metal material with a transverse axial hole at one end. One side has a long slit and a circular hole, and is sandblasted and blackened. A dual-band light source of visible light and thermal infrared is built into the square tube, and the dual-band light source is opposite to the long slit and the circular hole. The dual-band light source is an electroluminescent, heating element, and is thermally insulated from the tube wall. The visible light and thermal infrared radiation it generates are emitted through the slits and circular holes on the side of the rotating arm. After all the rotating arms 2 are unfolded outward, the slits and circular holes form a high-contrast pattern of straight lines and dots in the visible light and thermal infrared dual bands. After all the rotating arms 2 are folded inward, they are abutted against the aligner 3 to form an approximately cylindrical body, which is convenient for storage and carrying.

[0007] Preferably, the aligner 3 is a square tubular structure. One end of the aligner 3 is fixed to the central boss on the end face of the base 1, forming a long through-hole with the central circular hole of the base 1. Four sets of needles are symmetrically mounted on the inner side of the other end, forming an aiming cross with a central opening. The human eye can observe the target through the through-hole to achieve aiming.

[0008] The portable visible and infrared dual-band high-contrast optical target simulator is set up at a distance from the telescopic optical instrument that meets the infinity condition or relevant technical requirements, and the telescopic optical instrument and the portable visible and infrared dual-band high-contrast optical target simulator are aligned with each other. Use a photographic device to capture the image of the portable visible and infrared dual-band high-contrast optical target simulator in the eyepiece of the telescopic optical instrument. Keep the camera position and focus state unchanged, move the telescopic optical system, and then directly capture the portable visible and infrared dual-band high-contrast optical target simulator. Assuming that the four independent target point images of the portable visible and infrared dual-band high-contrast optical target simulator captured directly are A, B, C, and D, and the target points corresponding to the image of the portable visible and infrared dual-band high-contrast optical target simulator captured through the eyepiece are A′, B′, C′, and D′, then the viewing angle magnification of the telescopic optical system is:

[0009]

[0010] Compared with the existing technology, the portable visible and infrared dual-band high-contrast optical target simulator provided by the utility model has a compact overall structure, is easy to carry, set up and adjust, is compatible with both visible light and thermal infrared bands, and can quickly and accurately measure the performance of telescopic optical instruments such as thermal imaging telescopes and visible and infrared image fusion telescopes, such as the viewing angle magnification.

[0011] The portable visible and infrared dual-band high-contrast optical target simulator of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a diagram of the overall appearance of a specific embodiment of the utility model;

[0013] Figure 2 This is a front structural diagram of the base of a specific embodiment of the utility model;

[0014] Figure 3 This is a structural diagram of the rear side of the base of a specific embodiment of the utility model;

[0015] Figure 4 This is a cross-sectional view of a rotating arm according to a specific embodiment of the present utility model;

[0016] Figure 5 This is a front structural diagram of the aligner according to a specific embodiment of the present utility model;

[0017] Figure 6 This is a schematic diagram of a folded state of a specific embodiment of the utility model;

[0018] Figure 7 This is a schematic diagram of the installation state of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to clearly illustrate the technical features of this solution, the solution is described below through a specific implementation method and in conjunction with its accompanying drawings.

[0020] The utility model is a portable visible and infrared dual-band high-contrast optical target simulator. Figure 1 The portable visible and infrared dual-band high-contrast optical target simulator comprises a base 1, a rotating arm 2 and an aligner 3 installed on the base 1.

[0021] The base 1 is an axisymmetric columnar hollow structure with an octagonal end face. Figure 2 、 Figure 3 It is the external structure of the front and rear sides of the base 1. The aiming hole 4 is a circular through hole, located on the symmetry axis of the base 1. Rotating arm slots 5 are opened on the four non-adjacent sides of the base 1, and a rotating shaft 6 is provided in the rotating arm slot 5 for installing the rotating arm 2. A square mounting boss 7 is provided at the center of one end face of the base 1 for installing the aligner 3. A tripod interface 8 is provided on one side of the base 1. An annular cable groove 9 is provided on the other end face of the base 1, which can provide installation space for components such as cables, buttons and power interfaces. The cable groove 9 is connected to the rotating arm slot 5 to facilitate the passage of wires.

[0022] The rotating arm 2 is a square tubular structure with one end sealed. There is an axial hole at the unsealed end, which cooperates with the rotating shaft 6 on the base 1 to realize the installation of the rotating arm 2 on the base 1. The rotating arm 2 can rotate within a range of 90°. At the extreme positions at both ends, the four rotating arms 2 are respectively perpendicular and parallel to the axis of the aiming hole 4. A slit and a circular hole-shaped target hole 10 are opened on one side of the rotating arm 2, and are sandblasted and blackened to form a high-emissivity black surface. When the four rotating arms 2 are rotated to a position perpendicular to the axis of the aiming hole 4, all target holes 10 are in the same plane. A dual-band light source 11 is installed on the inner wall of the rotating arm 2 opposite to the target hole 10. When the dual-band light source 11 is energized, it can simultaneously generate visible light and thermal infrared radiation. The visible light and thermal infrared radiation are emitted from the target hole 10, so that the target hole 10 is in a high temperature and high brightness state, forming a dual-band simulated target of visible light and thermal infrared. Heat insulation measures are taken between the dual-band light source 11 and the inner wall of the square tube of the rotating arm 2 to reduce the heat dissipation from the dual-band light source 11 to the square tube, inhibit the temperature rise of the surface of the square tube of the rotating arm 2, and improve the thermal infrared signal intensity of the target hole 10, so that the simulated target has high contrast characteristics in both the visible light and thermal infrared bands. Figure 4It is the external and internal structure of the rotating arm 2.

[0023] The aligner 3 is also a square tubular structure with two open ends. One end is firmly connected to the mounting boss 7 of the base 1, ensuring that the aiming hole 4 is parallel to and directly opposite the aligner 3. Needles are installed on the four inner sides of the other end of the square tube of the aligner 3 to form a hollow aiming cross 12. By aligning the aiming hole 4, the aiming cross 12, and the telescopic optical system being tested, the direction of the portable visible and infrared dual-band high-contrast optical target simulator can be adjusted. The outer side of the aligner 3 has a rotating arm support surface 13 that cooperates with the rotating arm 2. Figure 5 This is the front view structure of the aligner 3. Figure 6 The four rotating arms 2 are all folded inward, and the surfaces of the four rotating arms with the target holes 9 are in contact with the rotating arm support surfaces 13. The entire portable visible and infrared dual-band high-contrast optical target simulator forms an approximately cylindrical shape, which is convenient for storage and carrying.

[0024] Figure 7 The portable visible and infrared dual-band high-contrast optical target simulator is set up on a tripod and deployed, and the adjustment function of the tripod is used to achieve height and direction adjustment.

[0025] The technical features not described in the present invention can be realized by existing technologies and will not be described in detail here. Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention shall also fall within the scope of protection of the present invention.

Claims

1. Portable visible and infrared dual-band high-contrast optical target simulator, characterized by: The invention comprises a base (1), a plurality of rotating arms (2) mounted on the side surface around the base (1), and an aligner (3) mounted on one end of the base (1). When the plurality of rotating arms (2) are rotated outward to a limit position, the target pattern is in an expanded state with a maximum area. When the plurality of rotating arms (2) are rotated inward to a limit position, the target pattern is in a stored state with a minimum volume.

2. The portable visible and infrared dual-band high-contrast optical target simulator according to claim 1 is characterized by: The base (1) is an axisymmetric polyhedron structure with a through hole in the center. One end face of the base (1) is a mounting boss for the aligner (3), and the other end face is a cable slot. A plurality of slots for mounting the rotating arm (2) are provided on the side of the base (1).

3. The portable visible and infrared dual-band high-contrast optical target simulator according to claim 1 is characterized by: The rotating arm (2) is a tubular structure with a long slit and a circular hole on the side. The rotating arm (2) has a built-in visible light and thermal infrared dual-band light source, which emits light when powered on to form multiple line targets and point targets.

4. The portable visible and infrared dual-band high-contrast optical target simulator according to claim 1 is characterized by: The aligner (3) is a tubular structure, with four groups of needles symmetrically mounted on the inner side of one end, forming an aiming cross with a central opening.

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