Special reflection optical fiber delay line for OCT (optical coherence tomography)

Abstract

The utility model discloses a special reflection optical fiber delay line for OCT (optical coherence tomography). The special reflection optical fiber delay line comprises a delay shell and an optical fiber delay accurate regulation and control mechanism, uniformly distributed fixing plates are arranged on the bottom wall of the delay shell, uniformly distributed optical fiber collimators are arranged at the upper end of the fixing plate on the left side, a fixed pyramid reflector is arranged on the right side of the fixing plate on the left side, and uniformly distributed optical fibers are arranged on the left wall of the delay shell in a penetrating manner; the optical fiber delay accurate regulation and control mechanism is arranged between the delay shell and the fixed plate and is matched with the fixed pyramid reflecting mirror, the single chip microcomputer is arranged on the front side of the delay shell, and the input end of the single chip microcomputer is electrically connected with an external power source. The OTC equipment electric signal delay can be accurately adjusted through the transmission element and the detection element, use is convenient, meanwhile, the device top cover is inserted and limited through the elastic element, and later overhaul and disassembly operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of OCT optical fiber delay, in particular to a special reflection optical fiber delay line for OCT. Background Technique

[0002] The full name of OCT is optical coherence tomography, which is a new technology applied to ophthalmology in recent years. OCT is a non-contact, high-resolution tomography and biological microscope imaging device. During the use of the OCT device, the transmission speed of its own electrical signal is slowed down by means of a equipped reflection optical fiber delay line. Some special reflection optical fiber delay lines for OCT include a box body. A fixed plate is installed inside the box body. A first mounting seat is installed on the side of the fixed plate. A first reflecting mirror is installed on the first mounting seat. A slider is slidably installed inside the box body. A second mounting seat is installed on one side of the slider. A second reflecting mirror is installed on the second mounting seat. The first reflecting mirror and the second reflecting mirror are arranged in cooperation. Two groups of gold-plated tubes are installed on the fixed plate. The gold-plated tubes penetrate through the fixed plate. An input optical fiber collimator and an output optical fiber collimator are respectively fixed inside the two groups of gold-plated tubes. The utility model can realize the adjustment of the optical fiber delay line of the OCT device within a short distance, and the optical signal realizes multiple reflections of the optical signal under the cooperation of the first reflecting mirror and the second reflecting mirror, increasing the delay effect of the signal. However, when adjusting the delay magnitude of the OCT electrical signal by this device, there is a lack of an effective detection device for the position between the two reflecting mirrors. The staff can only adjust the distance between the reflecting mirrors according to the actual delay time of the OCT electrical signal. The accuracy of adjusting the delay magnitude of the OCT electrical signal by the device needs to be improved. At the same time, the top cover of the device is installed and fixed by screws. When overhauling the device later, the screws need to be taken out one by one, and the operation is relatively cumbersome. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a special reflection optical fiber delay line for OCT. This device can accurately adjust the delay magnitude of the electrical signal of the OTC device through transmission elements and detection elements, is convenient to use, and at the same time, the top cover of the device is inserted and limited through elastic elements, and the overhaul and disassembly operation is convenient later, which can effectively solve the problems in the background technique.

[0004] To achieve the above object, the utility model provides the following technical solution: A special reflection optical fiber delay line for OCT, including a delay shell and an optical fiber delay precision control mechanism;

[0005] Delay shell: Its bottom wall is provided with uniformly distributed fixed plates. The upper ends of the left fixed plates are provided with uniformly distributed optical fiber collimators. A fixed corner cube reflector is provided on the right side of the left fixed plate. The left wall of the delay shell is penetrated with uniformly distributed optical fibers;

[0006] Optical fiber delay precise control mechanism: It is arranged between the delay shell and the fixed plate. The optical fiber delay precise control mechanism is installed in cooperation with the fixed corner cube reflector. This device can precisely adjust the delay magnitude of the electrical signal of the OTC device through the transmission element and the detection element, which is convenient to use. At the same time, the top cover of the device is inserted and limited through the elastic element, and the later maintenance and disassembly operations are convenient.

[0007] Furthermore, it also includes a single-chip microcomputer. The single-chip microcomputer is arranged on the front side of the delay shell, and the input end of the single-chip microcomputer is electrically connected to an external power supply, which is convenient for controlling electrical components.

[0008] Furthermore, the optical fiber delay precise control mechanism includes a sliding seat, a movable corner cube reflector, a stud, and a motor. The motor is arranged on the right side of the right fixed plate, and the input end of the motor is electrically connected to the output end of the single-chip microcomputer. The bottom wall of the delay shell is provided with uniformly distributed sliding grooves, and a sliding seat is slidably connected between the sliding grooves. A movable corner cube reflector is arranged on the left side of the sliding seat, and the movable corner cube reflector is installed in cooperation with the fixed corner cube reflector. A stud is rotatably connected between the fixed plates through a bearing, and the stud is threadedly connected to the sliding seat. The output shaft of the motor is fixedly connected to the right end of the stud, which drives the adjustment of the distance between the two corner cube reflectors in the OCT special reflection optical fiber delay line.

[0009] Furthermore, the optical fiber delay precise control mechanism also includes a rangefinder. The rangefinder is arranged at the upper left side of the sliding seat, and the rangefinder is bidirectionally electrically connected to the single-chip microcomputer, which measures and uploads the distance between the two corner cube reflectors in the OCT special reflection optical fiber delay line.

[0010] Furthermore, uniformly distributed slots are opened on both the front and rear sides of the delay shell, and plug sockets are inserted into the slots. A top cover is arranged between the plug sockets, which horizontally limits the movement of the top cover of the OCT special reflection optical fiber delay line through insertion.

[0011] Furthermore, uniformly distributed grooves are opened inside the delay shell, and locking seats are arranged in the grooves through uniformly distributed telescopic columns and springs. The springs are all movably sleeved on the outer ends of the adjacent telescopic columns. Locking grooves are opened on both the left and right sides of the plug socket, and the locking seats are inserted into the adjacent locking grooves, which vertically limits the top cover of the OCT special reflection optical fiber delay line through elastic insertion.

[0012] Furthermore, a rubber sealing strip is arranged on the upper side of the delay shell, which improves the installation sealing performance of the OCT special reflection optical fiber delay line and prevents external dust from entering.

[0013] Compared with the prior art, the beneficial effects of the present utility model are: This OCT special reflection optical fiber delay line has the following advantages:

[0014] 1. When adjusting the transmission delay of the electrical signal of the OCT device, the single-chip microcomputer starts the motor so that its output shaft drives the stud to rotate. The stud is connected by a thread so that the slide slides along the slide groove, and the slide drives the movable corner reflector to move. At the same time, the single-chip microcomputer starts the rangefinder. The optical signal emitted by the rangefinder is irradiated to the fixed plate on the left and then reflected back to the initial position. The distance between the movable corner reflector and the fixed corner reflector is obtained through the propagation time and speed of the optical signal, and the result is transmitted to the single-chip microcomputer in the form of an electrical signal. The single-chip microcomputer controls the motor according to the measurement result, and accurately adjusts the distance between the movable corner reflector and the fixed corner reflector, thereby accurately regulating the delay path of the collimated light in the device, thereby realizing the precise adjustment of the electrical signal delay of the OCT device. The OCT-specific reflective optical fiber delay line can accurately adjust the electrical signal delay of the OTC device through transmission elements and detection elements, and is easy to use.

[0015] 2. When inspecting the OCT special reflective optical fiber delay line, move the top cover to move it upward, and the top cover drives the plug-in seat to move upward along the slot. During the upward movement of the plug-in seat, the arc contact pressure between the locking groove and the locking seat causes the locking seat to enter the corresponding groove, and the telescopic end of the telescopic column and the spring contract to release the vertical movement limit of the locking seat on the plug-in seat, thereby separating the top cover from the device as a whole, which is convenient and quick to operate. After the inspection and maintenance of the OCT special reflective optical fiber delay line is completed, the top cover is installed according to the same principle, and the locking seat is plugged into the locking groove through the compression elastic force of the spring. For the OCT special reflective optical fiber delay line, the top cover is plugged and limited by the elastic element, and the later inspection and disassembly operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the internal right side structure of the utility model;

[0020] Figure 5 This is an enlarged structural diagram of point A of the utility model.

[0021] In the figure: 1 delay shell, 2 single chip microcomputer, 3 fixing plate, 4 fiber collimator, 5 slot, 6 optical fiber, 7 fixed corner reflector, 8 fiber delay precision control mechanism, 81 slide seat, 82 movable corner reflector, 83 stud, 84 motor, 85 rangefinder, 9 rubber sealing strip, 10 top cover, 11 socket, 12 telescopic column, 13 spring, 14 locking seat. Detailed implementation mode

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0023] Please refer to Figures 1-5 , this embodiment provides a technical solution: an OCT special reflection fiber optic delay line, including a delay shell 1 and a fiber optic delay precise regulation mechanism 8;

[0024] Delay housing 1: Its bottom wall is provided with uniformly distributed fixing plates 3. The upper end of the left fixing plate 3 is provided with uniformly distributed fiber collimators 4. The right side of the left fixing plate 3 is provided with a fixed corner cube reflector 7. The left wall of the delay housing 1 is penetrated with uniformly distributed optical fibers 6. Uniformly distributed slots 5 are opened on both the front and rear sides of the delay housing 1. Plug connectors 11 are inserted into the interiors of the slots 5. A top cover 10 is provided between the plug connectors 11. Uniformly distributed grooves are opened inside the delay housing 1. Locking seats 14 are provided in the interiors of the grooves through uniformly distributed telescopic columns 12 and springs 13. The springs 13 are all movably sleeved on the outer ends of the adjacent telescopic columns 12. Locking grooves are opened on both the left and right sides of the plug connector 11. The locking seats 14 are all inserted into the adjacent locking grooves. A rubber sealing strip 9 is provided on the upper side of the delay housing 1. When performing optical fiber delay on the electrical signal of the OCT device, two optical fibers 6 are connected in series to the transmission line of the OCT device. The electrical signal of the OCT device is converted into collimated light and emitted through the corresponding fiber collimator 4 by the front-end optical fiber 6. The collimated light is reflected between the fixed corner cube reflector 7 and the movable corner cube reflector 82. The delay effect is achieved by increasing the transmission path of the collimated light. Finally, the optical signal is optically coupled into the rear-end optical fiber 6 through the rear-end fiber collimator 4, thereby realizing the transmission delay of the electrical signal of the OCT device. When overhauling the OCT special reflection optical fiber delay line, the top cover 10 is toggled to move it upward. The top cover 10 drives the plug connector 11 to move upward along the slot 5. During the upward movement of the plug connector 11, due to the arc contact pressure between the locking groove and the locking seat 14, the locking seat 14 enters the corresponding groove. The telescopic end of the telescopic column 12 and the spring 13 contract, releasing the vertical movement limit of the locking seat 14 on the plug connector 11, thereby separating the top cover 10 from the whole device. The operation is convenient and fast. After the overhaul of the OCT special reflection optical fiber delay line is completed, it is installed by the same principle. The locking seat 14 is inserted into the locking groove through the compression elastic force of the spring 13 to limit the vertical movement of the top cover 10. The contact gap between the top cover 10 and the delay housing 1 is reduced through the rubber sealing strip 9 to prevent external dust from entering. For this OCT special reflection optical fiber delay line, the top cover 10 is limited by elastic elements during plugging, and the later overhaul and disassembly operations are convenient;

[0025] Optical fiber delay precise regulation mechanism 8: It is arranged between the delay housing 1 and the fixing plate 3. The optical fiber delay precise regulation mechanism 8 is installed in cooperation with the fixed corner cube reflector 7. It also includes a single-chip microcomputer 2. The single-chip microcomputer 2 is arranged on the front side of the delay housing 1. The input end of the single-chip microcomputer 2 is electrically connected to an external power supply. The optical fiber delay precise regulation mechanism 8 includes a slide seat 81, a moving corner cube reflector 82, a stud 83, and a motor 84. The motor 84 is arranged on the right side of the right fixing plate 3. The input end of the motor 84 is electrically connected to the output end of the single-chip microcomputer 2. The bottom wall of the delay housing 1 is provided with uniformly distributed sliding grooves. A slide seat 81 is slidably connected between the sliding grooves. A moving corner cube reflector 82 is arranged on the left side of the slide seat 81. The moving corner cube reflector 82 is installed in cooperation with the fixed corner cube reflector 7. A stud 83 is rotatably connected between the fixing plates 3 through a bearing. The stud 83 is threadedly connected to the slide seat 81. The output shaft of the motor 84 is fixedly connected to the right end of the stud 83. The optical fiber delay precise regulation mechanism 8 further includes a rangefinder 85. The rangefinder 85 is arranged at the upper left side of the slide seat 81. The rangefinder 85 is bidirectionally electrically connected to the single-chip microcomputer 2. When adjusting the delay size of the electrical signal transmission of the OCT device, the single-chip microcomputer 2 starts the motor 84 to drive its output shaft to drive the stud 83 to rotate. The stud 83 makes the slide seat 81 slide along the sliding groove through threaded connection. The slide seat 81 drives the moving corner cube reflector 82 to move. At the same time, the single-chip microcomputer 2 starts the rangefinder 85. The optical signal emitted by the rangefinder 85 is irradiated onto the left fixing plate 3 and then reflected back to the initial position. The distance between the moving corner cube reflector 82 and the fixed corner cube reflector 7 is obtained through the optical signal propagation time and speed, and the result is transmitted to the single-chip microcomputer 2 in the form of an electrical signal. The single-chip microcomputer 2 controls the motor 84 according to the measurement result to precisely adjust the distance between the moving corner cube reflector 82 and the fixed corner cube reflector 7, so as to precisely regulate the delay path of the collimated light in the device, and further realize the precise adjustment of the electrical signal delay size of the OCT device. This OCT special reflection optical fiber delay line can precisely adjust the electrical signal delay size of the OTC device through the transmission element and the detection element, and is convenient to use.

[0026] The working principle of the OCT special reflective fiber optic delay line provided by the present utility model is as follows: When fiber optic delay is performed on the electrical signal of the OCT device, two optical fibers 6 are connected in series to the transmission line of the OCT device. The electrical signal of the OCT device is transformed into collimated light and emitted through the corresponding fiber collimator 4 by the front-end optical fiber 6. The collimated light is reflected between the fixed corner cube reflector 7 and the moving corner cube reflector 82, and the delay effect is achieved by increasing the transmission path of the collimated light. Finally, the optical signal is optically coupled into the rear-end optical fiber 6 through the rear-end fiber collimator 4, thereby realizing the transmission delay of the electrical signal of the OCT device. When adjusting the magnitude of the transmission delay of the electrical signal of the OCT device, the single-chip microcomputer 2 starts the motor 84 so that its output shaft drives the stud 83 to rotate. The stud 83 is threadedly connected to make the slide block 81 slide along the chute. The slide block 81 drives the moving corner cube reflector 82 to move. At the same time, the single-chip microcomputer 2 starts the rangefinder 85. The optical signal emitted by the rangefinder 85 irradiates the left fixing plate 3 and then reflects back to the initial position. The distance between the moving corner cube reflector 82 and the fixed corner cube reflector 7 is obtained through the propagation time and speed of the optical signal, and the result is transmitted to the single-chip microcomputer 2 as an electrical signal. The single-chip microcomputer 2 controls the motor 84 according to the measurement result to accurately adjust the distance between the moving corner cube reflector 82 and the fixed corner cube reflector 7, thereby accurately controlling the delay path of the collimated light in the device, and further realizing the accurate adjustment of the magnitude of the electrical signal delay of the OCT device. It is convenient to use. When overhauling the OCT special reflective fiber optic delay line, toggle the top cover 10 to move it upward. The top cover 10 drives the socket 11 to move upward along the slot 5. During the upward movement of the socket 11, through the arc surface contact pressure between the locking groove and the locking seat 14, the locking seat 14 enters the corresponding groove, and the telescopic end of the telescopic column 12 and the spring 13 contract, releasing the vertical movement limit of the locking seat 14 on the socket 11, thereby separating the top cover 10 from the overall device. The operation is convenient and fast. After the OCT special reflective fiber optic delay line is overhauled, it is installed by the same principle. The locking seat 14 is inserted into the locking groove through the compression elastic force of the spring 13 to perform vertical movement limit on the top cover 10. The contact gap between the top cover 10 and the delay shell 1 is reduced through the rubber sealing strip 9 to prevent external dust from entering.

[0027] It should be noted that in the above embodiments, the single-chip microcomputer 2 disclosed can adopt MCS-51, the motor 84 can adopt WS-50ZYT78-R, the rangefinder 85 can adopt WH-LRF laser rangefinder, and the methods commonly used in the prior art are adopted for the single-chip microcomputer 2 to control the motor 84 and the rangefinder 85 to work.

[0028] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. OCT dedicated reflective fiber delay line, characterized by: It comprises a delay shell (1) and an optical fiber delay precision control mechanism (8); A delay shell (1): a bottom wall of which is provided with evenly distributed fixing plates (3); an upper end of the left fixing plate (3) is provided with evenly distributed optical fiber collimators (4); a right side of the left fixing plate (3) is provided with a fixed corner cube reflector (7); and an evenly distributed optical fiber (6) is provided through the left wall of the delay shell (1); Optical fiber delay precision control mechanism (8): it is arranged between the delay shell (1) and the fixed plate (3), and the optical fiber delay precision control mechanism (8) is installed in coordination with the fixed corner cone reflector (7); The optical fiber delay precision control mechanism (8) comprises a slide seat (81), a movable corner cone reflector (82), a stud (83) and a motor (84); the motor (84) is arranged on the right side of the fixed plate (3) on the right side; the input end of the motor (84) is electrically connected to the output end of the single chip computer (2); the bottom wall of the delay shell (1) is provided with evenly distributed slide grooves; the slide seat (81) is slidably connected between the slide grooves; the left side of the slide seat (81) is provided with a movable corner cone reflector (82); the movable corner cone reflector (82) is installed in coordination with the fixed corner cone reflector (7); a stud (83) is rotatably connected between the fixed plates (3) via a bearing; the stud (83) is threadedly connected to the slide seat (81); and the output shaft of the motor (84) is fixedly connected to the right end of the stud (83); The optical fiber delay precision control mechanism (8) further comprises a distance meter (85), wherein the distance meter (85) is arranged at the upper left end of the slide seat (81), and the distance meter (85) is bidirectionally electrically connected to the single-chip computer (2); The delay shell (1) is provided with slots (5) evenly distributed on both the front and rear sides, the slots (5) are each plugged with a socket (11), and a top cover (10) is provided between the sockets (11); The delay housing (1) is provided with evenly distributed grooves inside, and locking seats (14) are provided inside the grooves through evenly distributed telescopic columns (12) and springs (13), and the springs (13) are movably connected to the outer ends of adjacent telescopic columns (12). The left and right sides of the plug-in seat (11) are provided with locking grooves, and the locking seats (14) are plugged into adjacent locking grooves.

2. The OCT-specific reflective optical fiber delay line according to claim 1, characterized in that: It also comprises a single-chip microcomputer (2), wherein the single-chip microcomputer (2) is arranged on the front side of the delay shell (1), and an input end of the single-chip microcomputer (2) is electrically connected to an external power supply.

3. The OCT-specific reflective optical fiber delay line according to claim 1, characterized in that: A rubber sealing strip (9) is provided on the upper side of the delay shell (1).

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