CN216057020U - Free space communication module and physical isolation device - Google Patents
Free space communication module and physical isolation device Download PDFInfo
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- CN216057020U CN216057020U CN202122790423.6U CN202122790423U CN216057020U CN 216057020 U CN216057020 U CN 216057020U CN 202122790423 U CN202122790423 U CN 202122790423U CN 216057020 U CN216057020 U CN 216057020U
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- 238000004891 communication Methods 0.000 title claims abstract description 44
- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 53
- 239000000835 fiber Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims 2
- 239000013307 optical fiber Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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Abstract
An embodiment of the present invention provides a free space communication module, including: the device comprises a tail fiber, a collimator, an optical lens and a focusing bracket; wherein, focusing support includes: the device comprises a base, a left and right fine adjustment plate, an upper and lower fine adjustment plate, a lens cavity and a focusing plate, wherein the base is used for finely adjusting the focal length of the optical lens in the left and right, up and down and front and back directions; wherein, the two sides of the base are sequentially and symmetrically provided with a left and a right fine tuning plates, an upper and a lower fine tuning plates, a lens cavity, a focusing plate, a collimator and a tail fiber; vertically placing and fixing an optical lens in the lens cavity; a free space is formed between the two optical lenses; the free space is used for transmitting laser signals; the base is located below the free space. The utility model replaces the method based on the optical fiber cable as the optical signal transmission medium with the method based on the free space as the optical signal transmission medium, and realizes the real two-domain physical level isolation on the premise of ensuring the communication foundation between different security level networks.
Description
Technical Field
The utility model relates to the technical field of information security transmission, in particular to a free space communication module and a physical isolation device.
Background
The physical isolation means that the internal network cannot be directly or indirectly connected with the public network to avoid the attack of hackers from the external network on the internal network information, so that a clear security boundary is defined for the internal network, the management is convenient, the controllability is stronger, and the data communication between two domains adopting the physical isolation is more reliable and safer by adopting a one-way transmission communication mode.
The existing one-way optical gate product is usually composed of 2+1 structures, namely an external end machine, an internal end machine and an optical one-way channel. Wherein:
the external terminal is connected with a non-sensitive network (or a low-security network) to realize the work of collecting, capturing, receiving, analyzing a protocol, packaging, sending and the like of non-sensitive data;
the internal terminal machine is connected with a sensitive network (or a high-density network) and is responsible for receiving, unpacking, storing, forwarding and other works of data;
the data optical unidirectional link consists of a transmitting end, a receiving end and an optical fiber jumper. The optical fiber jumper is arranged between the sending end and the receiving end, and is a transmission medium of laser by adopting fiber made of glass or plastic according to the total reflection principle of light. In view of the functional characteristics and deployment location of the unidirectional shutter (between two networks of different security classes), it becomes a junction between networks of different security classes. And because the optical fiber cable is the only bridge for connecting the external terminal machine and the internal terminal machine in the unidirectional optical gate, the optical fiber cable becomes the only place where complete physical isolation cannot be formed between two networks with different security levels.
The optical communication in the traditional one-way optical gate adopts an optical fiber cable as a transmission medium, and compared with an electronic cable, the optical fiber cable can not generate electromagnetic waves and is not influenced by electromagnetic radiation, but can be used as a communication channel to realize transmission bandwidth up to hundreds of Gbps and can not realize two-domain physical level isolation in the true sense.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a free space communication module and a physical isolation device, which replace the method based on optical fiber cable as optical signal transmission medium with the method based on free space as optical signal transmission medium, so as to realize the real two-domain physical level isolation on the premise of ensuring the communication foundation between different security level networks.
In a first aspect of the present invention, there is provided a free space communication module comprising: the device comprises a tail fiber, a collimator, an optical lens and a focusing bracket; wherein,
the focusing support includes: the device comprises a base, a left and right fine adjustment plate, an upper and lower fine adjustment plate, a lens cavity and a focusing plate, wherein the base is used for finely adjusting the focal length of the optical lens in the left and right, up and down and front and back directions; wherein,
a left fine adjustment plate, a right fine adjustment plate, an upper fine adjustment plate, a lower fine adjustment plate, a lens cavity, a focusing plate, a collimator and a tail fiber are symmetrically arranged on two sides of the base in sequence;
vertically placing and fixing an optical lens in the lens cavity; a free space is formed between the two optical lenses; the free space is used for transmitting laser signals;
the base is located below the free space.
Furthermore, the bottoms of the left and right fine adjustment plates are slidably arranged on two sides of the base and used for fine adjustment of the left and right directions of the lens cavity;
the upper and lower fine adjustment plates are slidably arranged on the other sides of the left and right fine adjustment plates and used for fine adjustment of the lens cavity in the up-down direction;
the lens cavity is fixedly arranged on the other side of the upper and lower fine adjustment plates and is used for fixing an optical lens;
the focusing plate is fixedly arranged at the other side of the lens cavity and is provided with a focusing device for adjusting the front and back positions of the optical lens in the lens cavity.
Further, the base is provided with a fixing portion for fixing the free space communication module.
Further, the distance length of the free space is equal to the sum of the focal lengths of the two optical lenses.
Further, the centers of the left and right fine adjustment plates, the upper and lower fine adjustment plates, the lens cavity and the focusing plate are all provided with round holes; the centers of all round holes are positioned on the same axis and are used for transmitting laser signals.
Furthermore, the collimator is fixedly arranged on the other side of the focusing plate, and the center of the collimator and the center of the circular hole of the focusing plate are positioned on the same axis.
Furthermore, the tail fiber is connected with the other end of the collimator, and the interface type of the tail fiber is LC/UPC.
Further, the optical lens adopts a quartz lens, and the use wavelength is as follows: 185nm-2500 nm.
In a second aspect of the present invention, there is provided a physical isolation apparatus based on free space laser communication, including: the system comprises a sending end, a receiving end and the free space communication module; wherein,
the transmitting end is connected with the external terminal and used for receiving the electric signal data transmitted by the external terminal and converting the electric signal data into laser signals by taking light as a carrier;
the free space communication module is connected with the sending end and the receiving end through tail fibers and is used for transmitting laser signals from the sending end to the receiving end; the receiving end is connected with the internal terminal and used for receiving the laser signal, resolving and reducing the laser signal into electric signal data and transmitting the electric signal data to the internal terminal.
Further, the free space communication module has no directional limitation, and is used for physical isolation of laser communication in a physical isolation device.
The physical isolation device for laser communication provided by the utility model is based on free space transmission, realizes complete physical isolation and ensures the information safety.
It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the present invention will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
FIG. 1 illustrates a schematic structural diagram of a free space communications module of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a free space communication module focusing mount according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a laser transmission structure of an optical element according to an embodiment of the present invention;
fig. 4 shows a connection schematic of a physical isolation device of an embodiment of the utility model.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
01 tail fiber, 02 collimator, 03 optical lens, 07 free space, 08 focusing support, 09 base, 10 left and right fine adjustment plates, 11 upper and lower fine adjustment plates, 12 lens cavity, 13 focusing plate and 14 fixing part.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
A first aspect of the present embodiment, described below with reference to fig. 1 and 2, provides a free space communication module, including:
a tail fiber 01, a collimator 02, an optical lens 03 and a focusing bracket 08; wherein,
the focusing bracket 08 includes: a base 09, a left and right fine adjustment plate 10, an up and down fine adjustment plate 11, a lens cavity 12, and a focusing plate 13, for fine-adjusting the focal length of the optical lens 03 in the left and right, up and down, and front and back directions; wherein,
a left and right fine adjustment plate 10, an upper and lower fine adjustment plate 11, a lens cavity 12, a focusing plate 13, a collimator 02 and a tail fiber 01 are symmetrically arranged on two sides of the base 09 in sequence;
an optical lens 03 is vertically placed and fixed in the lens cavity 12; a free space 07 is formed between the two optical lenses 03; the free space 07 is used for transmission of laser signals;
a base 09 is located below the free space 07.
In the above embodiment, as shown in fig. 2, the bottom of the side surface of the left and right fine adjustment plates 10 is slidably mounted on both sides of the base 09 for fine adjustment of the lens cavity 12 in the left and right directions;
the upper and lower fine adjustment plates 11 are slidably mounted on the other side of the left and right fine adjustment plates 10 and used for fine adjustment of the lens cavity 12 in the up-down direction;
the lens cavity 12 is fixedly arranged at the other side of the upper and lower fine adjustment plates 11 and is used for placing and fixing an optical lens;
the focusing plate 13 is fixedly installed at the other side of the lens cavity 12, and is provided with a focusing device for adjusting the front and back positions of the optical lenses 03 in the lens cavity 12, so as to realize that the focal lengths of the two optical lenses 03 are at the same focal length.
In the above embodiment, the base 09 is provided with the fixing portion 14 for fixing the free space communication module.
In the above embodiment, the distance length of the free space 07 is equal to the sum of the focal lengths of the two optical lenses 03.
In the above embodiment, the centers of the left and right fine adjustment plates 10, the up and down fine adjustment plates 11, the lens cavity 12, and the focusing plate 13 are all provided with circular holes; the centers of all round holes are positioned on the same axis and are used for transmitting laser signals.
In the above embodiment, the collimator 02 is fixedly installed at the other side of the focusing plate 13; the center of the collimator 02 and the center of the circular hole of the focusing plate 13 are located on the same axis. The final adjustment is to make the center of the collimator and the center of the round hole on the focusing plate and the center of the optical lens on the same horizontal/vertical axis.
The focusing support has the overall function of ensuring the stability and the operational control of the collimator and the optical lens; fine adjustment in the up-down direction, the left-right direction and the front-back direction is achieved, focal length alignment of the optical lenses in the whole device is guaranteed, focal lengths of the two optical lenses are all on the focal length of the other side, and alignment of the optical lenses and the lenses in the collimator is also guaranteed, so that energy loss of laser in transmission is reduced and reduced, and stability of data transmission is guaranteed.
In the above embodiment, the pigtail 01 is connected to the other end of the collimator 02, and the interface type is LC/UPC. The interface can be adjusted according to actual needs and hardware requirements.
In the above embodiment, the optical lens is an ultraviolet fused silica lens, and the wavelengths used are: 185nm-2500 nm. Other lenses that meet the precision requirements may also be used.
A second aspect of the present embodiment is described below with reference to fig. 3 and 4, and provides a physical isolation apparatus based on free space laser communication, including: the system comprises a sending end, a receiving end and the free space communication module; wherein,
the transmitting end is connected with the external terminal and used for receiving the electric signal data transmitted by the external terminal and converting the electric signal data into laser signals by taking light as a carrier;
the free space communication module is connected with the sending end and the receiving end through a tail fiber 01 and is used for transmitting laser signals from the sending end to the receiving end;
the receiving end is connected with the internal terminal and used for receiving the laser signal, resolving and reducing the laser signal into electric signal data and transmitting the electric signal data to the internal terminal.
In the above embodiment, the optical lens 03 is used to convert divergent light into a parallel light beam; the free space 07 is used for parallel transmission of parallel light beams; the other optical lens 03 is used for converting the parallel light beam into divergent light and focusing the divergent light onto the other collimator 02. The free space of the design realizes the transmission of laser signals and the physical isolation in the real sense.
In the above embodiment, the beam divergence angle of the divergent light does not exceed 2 °. This angle is required to ensure that the laser light reaching the collimator is coupled into the receiving end with maximum efficiency. As shown in fig. 3, the beam divergence angle is calculated here to satisfy the following formula: tan (α) ═ d/f;
where f is the focal length of the collimator lens, and d is the fiber core diameter or the distance from the collimator to the optical lens.
In the above embodiments, the free space communication module has no directional limitation, and is used for physical isolation of laser communication in the physical isolation device. The connection of the free space communication module has no directivity, can be connected at will, and is simple to operate. As long as the accuracy of the transmitting end and the receiving end is ensured, the one-way transmission of the laser communication can be realized, and the physical isolation is realized.
In the above embodiment, the transmitting end includes an optical module, and the optical module is only used for emitting light and does not receive the transmitted laser signal; the receiving end contains an optical module which is only used for receiving light, only receives transmitted laser signals and cannot emit light; the arrangement ensures the one-way transmission of optical signals and realizes the physical isolation of the device.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the utility model. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules illustrated are not necessarily required to practice the utility model.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A free space communication module, comprising: the device comprises a tail fiber, a collimator, an optical lens and a focusing bracket; wherein,
the focusing support includes: the device comprises a base, a left and right fine adjustment plate, an upper and lower fine adjustment plate, a lens cavity and a focusing plate, wherein the base is used for finely adjusting the focal length of the optical lens in the left and right directions, the upper and lower directions and the front and back directions; wherein,
the left and right fine tuning plates, the upper and lower fine tuning plates, the lens cavity, the focusing plate, the collimator and the tail fiber are sequentially and symmetrically arranged on two sides of the base;
the optical lens is vertically placed and fixed in the lens cavity; a free space is formed between the two optical lenses; the free space is used for transmitting laser signals;
the base is located below the free space.
2. The free space communication module of claim 1, wherein the bottom of the side surface of the left and right fine adjustment plates is slidably mounted on the two sides of the base for fine adjustment of the lens cavity in the left and right direction;
the upper and lower fine adjustment plates are slidably mounted on the other side of the left and right fine adjustment plates and used for fine adjustment of the lens cavity in the up-down direction;
the lens cavity is fixedly arranged on the other side of the upper and lower fine adjustment plates and is used for placing and fixing the optical lens;
the focusing plate is fixedly arranged on the other side of the lens cavity, and a focusing device is arranged and used for adjusting the front position and the rear position of the optical lens in the lens cavity.
3. The free space communication module of claim 1, wherein the base is provided with a securing portion for securing the free space communication module.
4. The free-space communication module of claim 1, wherein the free-space distance length is equal to the sum of the focal lengths of the two optical lenses.
5. The free space communication module of claim 1, wherein the centers of the left and right trimming plates, the up and down trimming plates, the lens cavity, and the focusing plate are all provided with circular holes; the circle centers of all the round holes are positioned on the same axis and are used for transmitting the laser signals.
6. The free space communication module of claim 5, wherein the collimator is fixedly mounted on the other side of the focusing plate; the center of the collimator and the center of the round hole of the focusing plate are positioned on the same axis.
7. The free space communication module of claim 1, wherein the pigtail is connected to the other end of the collimator with an interface type of LC/UPC.
8. The free-space communication module of claim 1, wherein the optical lens is a quartz lens using wavelengths of: 185nm-2500 nm.
9. A physical isolation device based on free space laser communication, comprising: the system comprises a transmitting end and a receiving end, wherein the free space communication module of any claim 1-8 is adopted; wherein,
the transmitting end is connected with an external terminal and used for receiving the electric signal data transmitted by the external terminal and converting the electric signal data into laser signals by taking light as a carrier;
the free space communication module is connected with the sending end and the receiving end through tail fibers and is used for transmitting the laser signals from the sending end to the receiving end;
the receiving end is connected with the internal terminal and used for receiving the laser signal, resolving and restoring the laser signal into the electric signal data and transmitting the electric signal data to the internal terminal.
10. The physical isolation device of claim 9, wherein the free space communication module has no directional definition, and wherein the physical isolation device is configured for physical isolation of laser communication.
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| CN202122790423.6U CN216057020U (en) | 2021-11-15 | 2021-11-15 | Free space communication module and physical isolation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4312069A3 (en) * | 2022-06-07 | 2024-04-03 | Panduit Corp. | Apparatus for implementing low latency optical channels |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP4312069A3 (en) * | 2022-06-07 | 2024-04-03 | Panduit Corp. | Apparatus for implementing low latency optical channels |
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Address after: Room 514, 5th Floor, Building 1, No. 138 Malianwa North Road, Haidian District, Beijing, 100044 Patentee after: ZHONGTIE XINAN (BEIJING) INFORMATION SECURITY TECHNOLOGY Co.,Ltd. Country or region after: China Address before: Room 708-710, building 22, Shouti South Road, Haidian District, Beijing 100044 (Block E, Guoxing building) Patentee before: ZHONGTIE XINAN (BEIJING) INFORMATION SECURITY TECHNOLOGY Co.,Ltd. Country or region before: China |