A one-way collimator assembly

Abstract

The application relates to a one-way collimator assembly, which comprises a data transmitter, a data receiver and a one-way optical fiber connected between the data transmitter and the data receiver, and is provided with an optical fiber isolator and an optical fiber collimator on the one-way optical fiber; the optical fiber collimator comprises a collimator shell, the collimator shell is internally provided with oppositely arranged light emitting lenses and light receiving lenses, the light emitting lenses and the light receiving lenses are fixed in the collimator shell through lens shells, and the lens shells of the light emitting lenses and the lens shells of the light receiving lenses are integrally formed through a plurality of hard connecting rods; the lens shell of the light emitting lens is provided with a screw at the bottom, and the screw is fixed in a threaded hole arranged at the bottom of the collimator shell. The equipment increases the safety of one-way data and has good self-adaptive correction function.

Description

Technical Field

[0001] This invention belongs to the field of network information security technology, and specifically relates to a unidirectional collimator component. Background Technology

[0002] Currently, in some data security situations, only one-way data transmission is allowed, not only logically but also physically. That is to say, the line can only send data from one side to the other, and the other side is not allowed to send data to the local end.

[0003] The best way to achieve this physically isolated transmission is to use a unidirectional optical module (containing only a transmitting or receiving sensor) combined with a unidirectional optical fiber for data transmission. However, this unidirectional transmission method has relatively low security.

[0004] Furthermore, existing transceiver boxes directly fix the collimating lens to the box body with screws. During long-term use, the optical lens is prone to loosening or changes in beam angle due to factors such as airflow, mechanical vibration and temperature rise, and it does not have an adaptive correction function. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a novel unidirectional collimator assembly.

[0006] The specific technical solution of this invention is as follows:

[0007] This invention provides a unidirectional collimator assembly, including a data transmitter, a data receiver, and a unidirectional optical fiber connecting the data transmitter and the data receiver, wherein a unidirectional laser physical isolator is connected to the unidirectional optical fiber.

[0008] The unidirectional laser physical isolator includes an optical fiber isolator and an optical fiber collimator. The input end of the optical fiber isolator is connected to the data transmitter, and the output end is connected to the input end of the optical fiber collimator. The output end of the optical fiber collimator is connected to the input end of the data receiver.

[0009] The fiber optic collimator includes a collimator housing, within which are disposed a light-emitting lens and a light-receiving lens arranged opposite each other. Both the light-emitting lens and the light-receiving lens are fixed within the collimator housing by lens shells. The lens shells of the light-emitting lens and the light-receiving lens are integrally formed by several rigid connecting rods. A connecting plate is provided at the bottom of the lens shell of the light-emitting lens, and screws are provided on the connecting plate. The screws are fixed in threaded holes provided at the bottom of the collimator housing.

[0010] Furthermore, the collimator housing is provided with a connecting sleeve, and the connecting sleeve has an annular groove to fix the lens housing;

[0011] The light receiving lens has multiple piezoelectric bicrystalline wafers between its lens housing and annular groove. Each piezoelectric bicrystalline wafer is externally connected to a piezoelectric amplifier. The piezoelectric bicrystalline wafers are located at least at the top and bottom of the annular groove.

[0012] A control module is provided on the outside of the collimator housing, and the control module is connected to the piezoelectric amplifier.

[0013] Furthermore, the bottom of the lens housing of the light receiving lens is fixed to the bottom of the collimator housing via a connector.

[0014] Furthermore, the piezoelectric bicrystalline wafer is disposed on the front sidewall, rear sidewall, and / or inner sidewall of the top and bottom of the annular groove.

[0015] Another preferred improvement is that a plurality of flat, thin-film pressure sensing sheets are provided in the annular groove corresponding to the connecting sleeve of the light-emitting lens, and the flat, thin-film pressure sensing sheets are in contact with the lens housing; the flat, thin-film pressure sensing sheets are distributed on the front side wall and / or the rear side wall of the annular groove; the flat, thin-film pressure sensing sheets are connected to the control module.

[0016] Furthermore, there are 2-3 rigid connecting rods, evenly distributed and connected to the opposite sides of the two lens housings.

[0017] An improved technical solution is provided in which a cover is provided on the collimator housing, a recess is provided at the connection between the collimator housing and the cover, a silicone strip is provided in the recess, and the silicone strip is connected to the recess by a screw.

[0018] Another improved technical solution is that the collimator housing has an embedding groove on its outer side, and an embedding layer is fixed on the embedding groove by a connecting column. The embedding layer is filled with a composite rubber filler, which is composed of a rubber layer and a thermoplastic elastomer layer. The rubber layer has an inverted triangular structure at one end facing the thermoplastic elastomer layer.

[0019] Furthermore, the embedding slot has an L-shaped structure and is located at the corners of both sides of the collimator housing to the bottom surface. A fixing plate is provided on the collimator housing between the two embedding slots, and a connection hole is provided on the fixing plate.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention provides a novel unidirectional collimator assembly. The unidirectional collimator assembly adds a unidirectional laser physical isolator to the data line, i.e., the unidirectional optical fiber, which can further enhance security. This device can only transmit laser light in one direction. If the laser light is emitted in the opposite direction, the light signal intensity will be severely attenuated to an intensity that cannot be detected by the sensor, which can greatly increase the security of unidirectional data transmission.

[0022] In this invention, the light-emitting lens and light-receiving lens of the unidirectional collimator assembly are fixedly connected by an integrated lens housing, and their positions are relatively fixed, ensuring that the emission and reception angles of the two lenses are always consistent. The piezoelectric bicrystalline wafer, driven by the control module, can fine-tune the position of the light-receiving lens if it experiences a slight shift, while simultaneously adjusting the position of the light-emitting lens synchronously. On the other hand, the instantaneous sensing of a flat, thin-film pressure sensor can detect whether the lens position has shifted. The control module uses an algorithm to generate a control signal based on the shift position and changes in the detection information. After being amplified by a high-voltage amplifier, the signal controls the deformation of the piezoelectric bicrystalline wafer, adjusting the lens position to the correct position. It has excellent adaptive correction capabilities.

[0023] Thirdly, the embedded layer structure of the unidirectional collimator housing of the present invention has the effect of damping and adjusting mechanical resonance, and the thermoplastic elastomer of the embedded layer structure isolates the heat dissipation energy of external components, avoiding the influence of temperature rise on the angle of the emitted beam of the lens. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the unidirectional collimator assembly in this invention;

[0025] Figure 2 This is a schematic diagram of one structure of the fiber collimator in this invention;

[0026] Figure 3 This is a schematic diagram of another structure of the fiber collimator in this invention;

[0027] Figure 4 This is a schematic diagram of the structure of the fiber collimator housing in this invention. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and the following embodiments.

[0029] This invention provides a unidirectional collimator assembly, such as... Figure 1 As shown, the system includes a data transmitter 1, a data receiver 2, and a unidirectional optical fiber connecting the data transmitter 1 and the data receiver 2. A unidirectional laser physical isolator 3 is connected to the unidirectional optical fiber. The dimensions of the accompanying drawings in this invention have been appropriately scaled; the arrows indicate the direction of data transmission.

[0030] This invention provides a novel unidirectional collimator assembly. The unidirectional collimator assembly adds a unidirectional laser physical isolator to the data line, i.e., the unidirectional optical fiber, which can further enhance security. This device can only transmit laser light in one direction. If the laser light is emitted in the opposite direction, the light signal intensity will be severely attenuated to an intensity that cannot be detected by the sensor, which can greatly increase the security of unidirectional data transmission.

[0031] like Figure 1 As shown, the unidirectional laser physical isolator 3 in this embodiment includes an optical fiber isolator 31 and an optical fiber collimator 32. The input end of the optical fiber isolator 31 is connected to the data transmitter 1, and the output end is connected to the input end of the optical fiber collimator 32. The output end of the optical fiber collimator 32 is connected to the input end of the data receiver 2.

[0032] In this embodiment, the fiber optic isolator functions as follows: For light coming from the forward direction, its characteristics remain largely unchanged, allowing it to pass directly through the device with negligible loss. However, for light coming from the reverse or reflected direction, the isolator changes the parallel angle of the light to a diverging angle, preventing the light from propagating normally within the fiber, thus preventing the receiver from detecting the optical signal.

[0033] A fiber optic collimator takes the laser light coming from the fiber optic cable, passes it through an optical lens, and focuses it into parallel light. The light then travels a distance through the air, and the other end also passes through an optical lens to focus the parallel light from the other end into a spot, which is then coupled to the fiber optic cable behind it.

[0034] In this embodiment, the fiber optic collimator 32 includes a light emitting lens 321 and a light receiving lens 322 arranged opposite to each other, and both the light emitting lens 321 and the light receiving lens 322 are fixed inside the collimator housing 33.

[0035] Based on the above technology, the optical path for normal communication is as follows: the light passing through the fiber optic isolator does not change the direction of light transmission. After passing through the transmitting lens, it becomes parallel light. The receiving lens focuses the parallel light and couples it onto the subsequent optical fiber to ensure that normal communication is not affected.

[0036] An abnormal communication optical path (using the fiber optic isolator in the reverse direction) is as follows: the light passing through the fiber optic isolator becomes divergent light. After passing through the transmitting lens, it cannot be converted into parallel light and remains divergent. As the transmission distance increases, the divergence becomes stronger, and the light cannot reach the receiving lens normally. In other words, no optical signal is coupled to the subsequent optical fiber, so normal communication is impossible.

[0037] Further examples of improvements to fiber optic collimators, such as Figure 2As shown, both the light emitting lens 321 and the light receiving lens 322 are fixed inside the collimator housing 33 by lens housings. The lens housings of the light emitting lens 321 and the light receiving lens 322 are integrally formed by several rigid connecting rods 34. A connecting plate 351 is provided at the bottom of the lens housing of the light emitting lens 321, and screws 350 are provided on the connecting plate 351. The screws 350 are fixed in threaded holes provided at the bottom of the collimator housing 33. In a preferred embodiment, there are 2-3 rigid connecting rods 34, evenly distributed and connected to opposite sides of the two lens housings. These rigid connecting rods are made of rigid materials such as aluminum rods and are integrally formed with the lens housings. When the position of one lens housing shifts, it will cause the other side to shift as well, and the positions of the two remain relatively fixed, ensuring the coupling efficiency between the emitted and received beams.

[0038] In the specific design, the collimator housing 33 is provided with a connecting sleeve 35, and the connecting sleeve 35 has an annular groove 36 to fix the lens housing; multiple piezoelectric bicrystalline wafers 37 are provided between the lens housing of the light receiving lens 322 and its annular groove 36, and a piezoelectric amplifier 38 is externally connected to each piezoelectric bicrystalline wafer 37. The piezoelectric bicrystalline wafers 38 are located at least at the top and bottom of the annular groove 36; a control module 39 is provided on the outside of the collimator housing 33, and the control module 39 is connected to the piezoelectric amplifier 38. After receiving the adjustment command from the control module, the piezoelectric amplifier amplifies the command and drives the piezoelectric bicrystalline wafers to bend and generate displacement, thereby realizing the fine adjustment of the lens angle.

[0039] The bottom of the lens housing of the light receiving lens 322 is fixed to the bottom of the collimator housing via a connector. The piezoelectric bicrystalline wafer 37 is disposed on the front, rear, and / or inner wall surfaces of the bottom and top of the annular groove 36, enabling adjustment of the lens housing at various positions and directions. The connector here refers to a connector capable of slight deformation and can be made of rubber, resin, or metal materials.

[0040] Based on the above technical solutions, further improvements to the fiber optic collimator are shown in examples such as... Figure 3As shown, a plurality of flat, thin-film pressure sensing sheets 360 are provided in the annular groove 36 within the connecting sleeve 35 corresponding to the light-emitting lens 321. These flat, thin-film pressure sensing sheets 360 are in contact with the lens housing. The flat, thin-film pressure sensing sheets 360 are distributed on the front and / or rear sidewalls of the annular groove 36. The flat, thin-film pressure sensing sheets 360 are connected to the control module 39. In this scheme, the instantaneous sensing by the flat, thin-film pressure sensing sheets can detect whether the lens position has shifted. The control module uses an algorithm to generate a control signal based on the shift position and changes in the detection information. After amplification by a high-voltage amplifier, the signal is used to control the deformation of the piezoelectric bicrystalline wafer, adjusting the lens position to the correct position. After adjustment, the flat, thin-film pressure sensing sheets immediately feed back whether the adjustment status meets the standard to the control module, thus enabling the collimator to have an adaptive correction function.

[0041] In this embodiment, to ensure that the two optical components of the fiber optic collimator (i.e., the light emitting lens and the light receiving lens) are not affected by severe vibrations, the following improvements are made.

[0042] like Figure 4 As shown, in this embodiment, the collimator housing 33 is provided with a cover 40, and a recess 41 is provided at the connection between the collimator housing 33 and the cover 40. A silicone strip 42 is provided in the recess 41, and the silicone strip 42 is connected to the recess 41 by screws. For other threaded holes, cured adhesive can be used, which itself can prevent moisture from entering, thus solving the moisture problem.

[0043] The collimator housing 33 has an embedding groove 54 on its outer side, and an embedding layer 50 on the embedding groove. The embedding layer 50 is connected and fixed by a connecting post 56 within the groove. The embedding layer 50 is filled with a composite rubber filler, which consists of a rubber layer 51 and a thermoplastic elastomer layer 52. One end of the rubber layer 51 facing the thermoplastic elastomer layer 52 has an inverted triangular structure 53. The embedding groove 54 is L-shaped and located at the corners of both sides of the collimator housing 33 to the bottom. A fixing plate 55 is provided on the collimator housing 33 between the two embedding grooves 54, and the fixing plate 55 has connecting holes. The embedding layer structure provides shock absorption and adjusts mechanical resonance. Furthermore, the thermoplastic elastomer in the embedding layer isolates the heat dissipation energy of external components, preventing temperature changes from affecting the angle of the beam emitted by the lens. The inverted triangular structure increases the area of ​​the thermoplastic elastomer end face, ensuring the overall structural strength.

[0044] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A unidirectional collimator assembly, characterized in that, It includes a data transmitter (1), a data receiver (2) and a unidirectional optical fiber connecting the data transmitter (1) and the data receiver (2), and a unidirectional laser physical isolator (3) is connected to the unidirectional optical fiber; The unidirectional laser physical isolator (3) includes an optical fiber isolator (31) and an optical fiber collimator (32). The input end of the optical fiber isolator (31) is connected to the data transmitter (1), and the output end is connected to the input end of the optical fiber collimator (32). The output end of the optical fiber collimator (32) is connected to the input end of the data receiver (2). The fiber optic collimator (32) includes a collimator housing (323). Inside the collimator housing (33) are a light emitting lens (321) and a light receiving lens (322) arranged opposite to each other. The light emitting lens (321) and the light receiving lens (322) are both fixed inside the collimator housing (33) by lens shells. The lens shells of the light emitting lens (321) and the lens shells of the light receiving lens (322) are integrally formed by several rigid connecting rods (34). The bottom of the lens shell of the light emitting lens (321) is provided with a connecting plate (351). The connecting plate (351) is provided with screws (350). The screws (350) are fixed in the threaded holes provided at the bottom of the collimator housing (33). The collimator housing (33) is provided with a connecting sleeve (35), and the connecting sleeve (35) is provided with an annular groove (36) to fix the lens housing; The light receiving lens (322) has a plurality of piezoelectric bicrystalline wafers (37) between its lens shell and its annular groove (36). The piezoelectric bicrystalline wafers (37) are externally connected to a piezoelectric amplifier (38). The piezoelectric bicrystalline wafers (37) are at least located at the top and bottom of the annular groove (36). A control module (39) is provided on the outside of the collimator housing (33), and the control module (39) is connected to the piezoelectric amplifier (38); A plurality of flat, thin-film pressure sensing sheets (360) are provided in the annular groove (36) corresponding to the connecting sleeve (35) of the light emitting lens (321). The flat, thin-film pressure sensing sheets (360) are in contact with the lens shell. The flat, thin-film pressure sensing sheets (360) are distributed on the front side wall and / or rear side wall of the annular groove (36). The flat, thin-film pressure sensing sheets (360) are connected to the control module (39).

2. The unidirectional collimator assembly according to claim 1, characterized in that, The bottom of the lens housing of the light receiving lens (322) is fixed to the bottom of the collimator housing (33) by a connector.

3. The unidirectional collimator assembly according to claim 1, characterized in that, The piezoelectric bicrystalline wafer (37) is disposed on the front side wall, rear side wall and / or inner wall of the top and bottom of the annular groove (36).

4. The unidirectional collimator assembly according to claim 1, characterized in that, There are 2-3 rigid connecting rods (34), which are evenly distributed and connected to the opposite sides of the two lens housings.

5. The unidirectional collimator assembly according to claim 1, characterized in that, The collimator housing (33) is provided with a cover (40), and a recess (41) is provided at the connection between the collimator housing (33) and the cover (40). A silicone strip (42) is provided in the recess (41), and the silicone strip (42) is connected to the recess (41) by screws.

6. The unidirectional collimator assembly according to claim 5, characterized in that, The collimator housing (33) has an embedding groove (54) on its outer side. An embedding layer (50) is fixed on the embedding groove by a connecting post (56). The embedding layer (50) is filled with a composite rubber filling part, which is composed of a rubber layer (51) and a thermoplastic elastomer layer (52). The rubber layer (51) has an inverted triangular structure (53) at one end facing the thermoplastic elastomer layer (52).

7. The unidirectional collimator assembly according to claim 6, characterized in that, The embedding slot (54) has an L-shaped structure and is located at the corners of the collimator housing (33) on both sides to the bottom. A fixing plate (55) is provided on the collimator housing (33) between the two embedding slots (54), and a connecting hole is provided on the fixing plate (55).

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