Non-charged radar receiving device based on laser reflection principle

Abstract

The utility model relates to the technical field of optical instruments, and particularly discloses a non-charged radar receiving device based on a laser reflection principle, which comprises a laser emission optical fiber, a reflection type optical thin film assembly and a laser receiving optical fiber. The laser emitting optical fiber and the laser receiving optical fiber are located on the two sides of the outer portion of the opening of the reflective optical thin film assembly respectively and are symmetrically distributed. According to the utility model, the optical fiber medium replaces an electronic loop, and a physical isolation type signal channel is established; optical modulation and spatial distribution optimization of laser signals are realized through the concave disc-shaped reflecting film; a symmetric optical fiber array is constructed to improve the optical signal capturing efficiency, and an all-optical radar receiving solution with interference resistance, electromagnetic pulse interference resistance and high fidelity is formed.

Description

Technical Field

[0001] This utility model relates to the field of optical instrument technology, specifically to a non-electric radar receiving device based on the principle of laser reflection. Background Technology

[0002] Traditional electronic radar receivers rely on metal conductors and electronic circuits to transmit signals, resulting in significant electromagnetic susceptibility defects: firstly, electronic components are vulnerable to damage from electromagnetic pulse (EMP) weapons; secondly, signal transmission is susceptible to interference from strong electromagnetic environments, leading to a deterioration in the signal-to-noise ratio; and thirdly, electronic devices exposed to the ground exhibit electromagnetic radiation characteristics, making them difficult to conceal. Existing anti-jamming technologies mostly employ electromagnetic shielding or filtering circuits, but these cannot fundamentally eliminate electromagnetically sensitive components, and the risk of systemic failure remains when encountering EMP attacks exceeding 10kV / m. Utility Model Content

[0003] The purpose of this invention is to provide a non-electric radar receiver based on the principle of laser reflection. By reconstructing the radar receiver system through a fully optical transmission architecture, it solves the fundamental defects of traditional electronic devices in terms of electromagnetic defense, signal fidelity, and stealth.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A non-electric radar receiving device based on the principle of laser reflection includes a laser emitting fiber, a reflective optical thin film assembly, and a laser receiving fiber. The laser emitting fiber and the laser receiving fiber are located on opposite sides of the opening of the reflective optical thin film assembly, and are symmetrically distributed.

[0006] When the reflective optical thin film assembly receives an ultrasonic wave, the reflective optical thin film assembly vibrates, and the laser reflected from the center of the reflective optical thin film assembly carries the corresponding change into the laser receiving optical fiber.

[0007] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the angle between the optical fiber port axis of the laser emitting fiber and the central normal of the reflective optical thin film assembly is 45°±2°, and the laser emitted by the laser emitting fiber is focused on the central region of the reflective optical thin film assembly.

[0008] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the angle between the optical fiber port axis of the laser receiving optical fiber and the central normal of the reflective optical thin film assembly is 45°±2°.

[0009] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, both the laser emitting fiber and the laser receiving fiber have buried sections, and the buried sections have outer sheaths.

[0010] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the reflective optical thin film assembly has a concave disk-shaped structure.

[0011] The surface of the reflective optical thin-film assembly is coated with a dielectric film.

[0012] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the reflectivity of the dielectric film is ≥99.5%.

[0013] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the ratio of the radius of curvature R of the reflective optical thin film component to the diameter d of the laser emitting fiber satisfies R / d = 1.618 ± 0.1.

[0014] The non-electric radar receiving device based on the principle of laser reflection provided in at least one embodiment of this disclosure also includes a support base.

[0015] The support base is fixedly disposed at the bottom of the reflective optical thin film assembly, and the support base is not electrically connected to the reflective optical thin film assembly.

[0016] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the reflected light spot received by the laser receiving optical fiber covers at least 80% of the area of ​​the input end of the laser receiving optical fiber.

[0017] In at least one embodiment of the non-electric radar receiving device based on the principle of laser reflection provided in this disclosure, the outer sheath is a metal-ceramic composite shielding outer sheath.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. Significantly enhances electromagnetic defense capabilities: The optical fiber is buried deep underground, greatly increasing the electromagnetic attenuation rate. The reflective thin film component eliminates circuit-sensitive elements, which can resist high-intensity EMP attacks.

[0020] 2. Excellent anti-interference performance: The all-optical architecture avoids electromagnetic coupling effects, greatly improving the system signal-to-noise ratio.

[0021] 3. Enhanced stealth capabilities: Adjustable laser wavelength and fiber optics with no electromagnetic radiation characteristics improve battlefield survivability.

[0022] 4. Excellent environmental adaptability: Adopting all-optical principles and fiber optic structure, it adapts to various extreme weather conditions and ensures that the signal does not attenuate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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.

[0024] Figure 1 This is a schematic diagram of the overall structure of a non-electric radar receiver based on the principle of laser reflection according to this utility model.

[0025] In the picture:

[0026] 1. Laser emitting fiber;

[0027] 2. Reflective optical thin-film components;

[0028] 3. Laser receiving optical fiber;

[0029] 4. Support base. Detailed Implementation

[0030] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0031] This invention aims to reconstruct radar receiving systems through a fully optical transmission architecture, addressing the fundamental shortcomings of traditional electronic devices in terms of electromagnetic defense, signal fidelity, and stealth. This invention replaces electronic circuits with optical fiber media to establish a physically isolated signal channel; it achieves optical modulation and spatial distribution optimization of laser signals through a concave disc-shaped reflective film; and it constructs a symmetrical fiber array to improve optical signal acquisition efficiency, forming a high-fidelity, interference-resistant, electromagnetic pulse-resistant, and high-fidelity all-optical radar receiving solution.

[0032] Please see Figure 1 As shown, this embodiment provides a non-electric radar receiving device based on the principle of laser reflection, including a laser emitting fiber 1, a reflective optical thin film assembly 2, a laser receiving fiber 3, and a support base 4.

[0033] Specifically, the laser emitting fiber 1 and the laser receiving fiber 3 are symmetrically distributed on both sides outside the opening of the reflective optical thin film assembly 2.

[0034] Specifically, the support base 4 is connected to the bottom of the reflective optical thin film assembly 2, but there is no electrical connection between them. When the reflective optical thin film assembly 2 receives the ultrasonic wave emitted and reflected back by the radar transmitter, it will vibrate slightly. The laser reflected from the center of the reflective optical thin film assembly 2 will carry the corresponding changes into the laser receiving fiber 3, where the laser signal will be demodulated and analyzed at a distance.

[0035] In this embodiment, the output end of the laser emitting fiber 1 is arranged on the left side outside the opening of the reflective optical thin film assembly 2. The angle θ1 between the fiber optic port axis and the center normal of the reflective optical thin film assembly 2 is 45°±2°, and the emitted laser is focused on the central region of the reflective optical thin film assembly 2 with a spot diameter ≤1mm.

[0036] In this embodiment, the input end of the laser receiving fiber 3 is arranged on the right side outside the opening of the reflective optical thin film assembly 2, and the angle θ2 between the fiber optic port axis and the center normal of the reflective optical thin film assembly 2 is 45°±2°, and the received reflected light spot covers more than 80% of the area of ​​the input end of the laser receiving fiber 3.

[0037] In this embodiment, the buried depth of the laser emitting fiber 1 and the laser receiving fiber 3 is ≥30 meters, and the outer sheath of the buried part is a metal-ceramic composite shielding layer with an electromagnetic attenuation rate ≥98.6%.

[0038] In this embodiment, the reflective optical thin film assembly 2 is a concave disc-shaped structure, and its surface is coated with a dielectric film with a reflectivity of ≥99.5%. The reflective optical thin film assembly 2 is fixedly mounted on the support base 4.

[0039] Specifically, the ratio of the radius of curvature R of the reflective optical thin film component 2 to the diameter d of the laser emitting fiber satisfies R / d=1.618±0.1, and its inherent resonant frequency f0 matches the radar ultrasonic frequency band, satisfying f0∈[1kHz,20MHz].

[0040] The following describes the usage method of the non-electric radar receiver based on the laser reflection principle in the embodiments.

[0041] The buried sections of laser transmitting fiber 1 and laser receiving fiber 3 are laid underground at a depth of ≥30 meters, and the outer sheath of the buried part is made of metal-ceramic composite shielding layer.

[0042] The reflective optical thin film assembly 2 is fixed in a preset position by the support base 4, ensuring that the surface of its concave disc structure is clean and unobstructed, and that the ratio of the radius of curvature R to the diameter d of the laser emitting fiber satisfies R / d=1.618±0.1.

[0043] The output end of the laser emitting fiber 1 is arranged on the left side outside the opening of the reflective optical thin film assembly 2. The angle θ1 between the fiber optic port axis and the center normal of the reflective optical thin film assembly 2 is 45°±2°, and the emitted laser is focused on the central region of the reflective optical thin film assembly 2 with a spot diameter ≤1mm.

[0044] The input end of the laser receiving fiber 3 is arranged on the right side outside the opening of the reflective optical thin film assembly 2. The angle θ2 between the fiber port axis and the center normal of the reflective optical thin film assembly 2 is 45°±2°, and the received reflected light spot covers more than 80% of the area of ​​the input end of the laser receiving fiber 3.

[0045] Although embodiments of this application have been shown and described above, the scope of protection of this utility model is not limited thereto. Any changes or substitutions that can be conceived without inventive effort should be included within the scope of protection of this utility model. Unless expressly stated otherwise, no element, action or instruction used herein should be construed as critical or necessary.

Claims

1. A non-electric radar receiver based on the principle of laser reflection, comprising: The laser emitting fiber, the reflective optical thin-film assembly, and the laser receiving fiber are characterized by: The laser emitting fiber and the laser receiving fiber are located on opposite sides outside the opening of the reflective optical thin film assembly, and the laser emitting fiber and the laser receiving fiber are symmetrically distributed. When the reflective optical thin film assembly receives an ultrasonic wave, the reflective optical thin film assembly vibrates, and the laser reflected from the center of the reflective optical thin film assembly carries the corresponding change into the laser receiving optical fiber.

2. The non-electric radar receiving device based on the laser reflection principle according to claim 1, characterized in that, The angle between the fiber optic axis of the laser emitting fiber and the central normal of the reflective optical thin film assembly is 45°±2°, and the laser emitted by the laser emitting fiber is focused on the central region of the reflective optical thin film assembly.

3. The non-electric radar receiving device based on the laser reflection principle according to claim 1, characterized in that, The angle between the fiber optic port axis of the laser receiving fiber and the central normal of the reflective optical thin film assembly is 45°±2°.

4. The non-electric radar receiving device based on the laser reflection principle according to claim 1, characterized in that, Both the laser emitting fiber and the laser receiving fiber have buried sections, and the buried sections have outer sheaths.

5. A non-electric radar receiving device based on the principle of laser reflection according to claim 4, characterized in that, The reflective optical thin film assembly has a concave disk-shaped structure. The surface of the reflective optical thin-film assembly is coated with a dielectric film.

6. A non-electric radar receiving device based on the principle of laser reflection according to claim 5, characterized in that, The reflectivity of the dielectric film is ≥99.5%.

7. A non-electric radar receiving device based on the principle of laser reflection according to claim 1, characterized in that, The ratio of the radius of curvature R of the reflective optical thin film assembly to the diameter d of the laser emitting fiber satisfies R / d = 1.618 ± 0.

1.

8. A non-electric radar receiving device based on the principle of laser reflection according to claim 1, characterized in that, It also includes a support base; The support base is fixedly disposed at the bottom of the reflective optical thin film assembly, and the support base is not electrically connected to the reflective optical thin film assembly.

9. A non-electric radar receiving device based on the principle of laser reflection according to claim 3, characterized in that, The reflected light spot received by the laser receiving fiber covers at least 80% of the area of ​​the input end of the laser receiving fiber.

10. A non-electric radar receiving device based on the principle of laser reflection according to claim 4, characterized in that, The outer sheath is a metal-ceramic composite shielding outer sheath.

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