Special wavelength ultra-bandwidth high-speed optical fiber delay line for OCT

Abstract

The utility model discloses a special wavelength ultra-bandwidth high-speed optical fiber delay line for OCT (Optical Coherence Tomography), which comprises a shell, signal input heads are arranged at the left end of the shell, signal output heads are arranged at the right end of the shell, sliding plates are transversely and slidably connected into the shell, delay reflection lenses are arranged on the opposite inner side faces of the two sliding plates corresponding to the transverse position, positioning holes are formed in the surface of a partition plate in the middle of the shell, and positioning columns are installed on the surfaces of the sliding plates. According to the special wavelength ultra-bandwidth high-speed optical fiber delay line for the OCT, fixed-distance adjustment is carried out on optical signal reflection components of the optical fiber delay line, the adjustment error of the optical fiber delay line is reduced, and the optical fiber delay line has the advantages that the optical signal reflection components of the optical fiber delay line can be adjusted in a fixed-distance mode; the delay time of the optical fiber delay line is adjusted more accurately, and the signal transmission effect of the OCT special-purpose wavelength ultra-bandwidth high-speed optical fiber delay line is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber delay lines, in particular to an ultra-wideband high-speed optical fiber delay line with a wavelength dedicated to OCT. Background Art

[0002] OCT is optical coherence tomography technology, which is an imaging technology that has developed rapidly in the past decade. It uses the basic principle of weak coherent light interferometer to detect the back reflection or several scattered signals of the incident weak coherent light at different depth levels of biological tissue. By scanning, a two-dimensional or three-dimensional structural image of the biological tissue can be obtained. In the process of OCT equipment using ultra-wideband technology for high-speed signal transmission, it is necessary to use an optical fiber delay line to delay the optical signal to improve the transmission effect of the optical signal. In the prior art, in order to meet the delay needs in different situations, the delay effect of the optical fiber delay line can be adjusted. The optical signal reflection component is driven by a driving device to move, the propagation path of the optical signal is changed, and then the delay time of the optical fiber delay line is adjusted. However, the movement of the optical signal reflection component is mostly continuous, and errors are prone to occur during the movement, which reduces the accuracy of the delay time adjustment of the optical fiber delay line and affects the signal transmission effect of the optical fiber delay line. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects, provide an ultra-wideband high-speed optical fiber delay line with a dedicated wavelength for OCT, adjust the optical signal reflection components of the optical fiber delay line at a fixed interval, reduce the adjustment error of the optical fiber delay line, make the delay time adjustment of the optical fiber delay line more accurate, ensure the signal transmission effect of the ultra-wideband high-speed optical fiber delay line with a dedicated wavelength for OCT, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ultra-wideband high-speed optical fiber delay line with a dedicated wavelength for OCT, comprising a housing;

[0005] Shell: The left end thereof is provided with a signal input head, and the right end thereof is provided with a signal output head. The inside of the shell is respectively connected with slide plates for transverse sliding. The two slide plates corresponding to the transverse positions are provided with delayed reflection lenses on the opposite inner sides. The surfaces of the partitions in the middle of the shell are respectively provided with positioning holes. The surfaces of the slide plates are respectively provided with positioning posts. The semicircular ends of the positioning posts are plugged into the positioning holes. An adjustment rod is installed between the left and right inner walls of the shell. The adjustment rod is installed in conjunction with the slide plate to adjust the optical signal reflection components of the optical fiber delay line at a fixed interval, thereby reducing the adjustment error of the optical fiber delay line, making the delay time adjustment of the optical fiber delay line more accurate, and ensuring the signal transmission effect of the ultra-wideband high-speed optical fiber delay line with a dedicated wavelength for OCT.

[0006] Furthermore, the sliding holes on the surface of the skateboard are longitudinally slidably connected with positioning columns, and the outer arc surfaces of the positioning columns are movably sleeved with tension springs, one end of the tension spring close to the middle partition of the shell is fixedly connected to the inner wall of the sliding hole of the skateboard, and the other end of the tension spring is fixedly connected to the positioning column to limit the position of the positioning column.

[0007] Furthermore, the adjusting rod includes a screw rod, which is rotatably connected between the left and right inner walls of the shell, and the thread directions of the left and right ends of the screw rod are opposite. The screw rod is installed in cooperation with the slide plate to facilitate the movement of the slide plate.

[0008] Furthermore, the adjusting rod includes an adjusting plate and a spring, the adjusting plates are respectively threadedly connected to the left and right ends of the screw, the adjusting plate is laterally slidingly connected to the inside of the shell, a spring is provided between the adjusting plate and the slide plate, the spring is movably sleeved on the outer arc surface of the screw, and the elastic force of the spring is used to provide power for the movement of the slide plate.

[0009] Furthermore, a single chip microcomputer is disposed inside the shell, and an input terminal of the single chip microcomputer is electrically connected to an external power supply to control the start and stop of the entire device.

[0010] Furthermore, a motor is provided on the left side of the shell, the right end of the output shaft of the motor is fixedly connected to the screw, and the input end of the motor is electrically connected to the input end of the single chip microcomputer to provide power for the rotation of the screw.

[0011] Furthermore, optical fiber lines are installed inside the signal input head and the signal output head to facilitate the connection between the entire device and the OCT equipment.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the OCT dedicated wavelength ultra-wideband high-speed optical fiber delay line has the following advantages:

[0013] When in use, the whole device is connected to the OCT device through an optical fiber line. The OCT device is based on an extremely short wavelength signal and uses a large bandwidth spectrum to transmit the working signal at a high speed. During the transmission of the optical signal, the delayed reflection lens is used to guide the propagation path of the optical signal, and the signal of the OCT device is delayed by using the principle of optical signal propagation in the optical fiber. At the same time, the motor can be started by the single-chip microcomputer. Under the elastic force of the spring, the limit of the slide plate is cancelled, and then the slide plate is pushed to move, and the delay time of the optical signal is adjusted. During the adjustment process, as the slide plate moves, when the positioning column coincides with the positioning hole, under the elastic force of the tension spring, the semicircular end of the positioning column is reinserted into the positioning hole, and at the same time, a part of the elastic force of the spring is released. The spring needs to be contracted again to push the slide plate to move, and the optical signal reflection component of the optical fiber delay line is adjusted at a fixed distance, so as to reduce the adjustment error of the optical fiber delay line, so that the delay time adjustment of the optical fiber delay line is more accurate, and the signal transmission effect of the ultra-wideband high-speed optical fiber delay line with a dedicated wavelength for OCT is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the front view cross section of the overall device of the utility model;

[0016] Figure 3 It is a schematic structural diagram of a side cross-section of the overall device of the utility model;

[0017] Figure 4 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0018] In the figure: 1 housing, 2 signal input head, 3 signal output head, 4 slide plate, 5 delayed reflection lens, 6 positioning hole, 7 positioning column, 8 tension spring, 9 adjustment rod, 91 screw rod, 92 adjustment plate, 93 spring, 10 single chip microcomputer, 11 motor, 12 optical fiber line. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 ,This embodiment provides a technical solution: an OCT dedicated wavelength ultra-wideband high-speed optical fiber delay line, comprising a housing 1;

[0021] Shell 1: The left end thereof is provided with a signal input head 2, and the right end of the shell 1 is provided with a signal output head 3, which is convenient for the entry and emission of optical signals. The inside of the shell 1 is respectively connected with slide plates 4 for horizontal sliding. The two slide plates 4 corresponding to the horizontal position are provided with delayed reflection lenses 5 on the opposite inner sides. The delayed reflection lenses 5 are used to reflect the optical signal, guide the propagation path of the optical signal, and delay the optical signal. By adjusting the left and right spacing of the slide plates 4, the propagation path of the optical signal is adjusted to control the delay time of the optical signal. Positioning holes 6 are respectively provided on the surface of the partition in the middle of the shell 1, and positioning posts 7 are installed on the surface of the slide plates 4. The semicircular ends of the positioning posts 7 are plugged into the positioning holes 6 to adjust the position of the slide plates 4. To limit the delay time of the optical signal, an adjusting rod 9 is installed between the left and right inner walls of the housing 1. The adjusting rod 9 is installed in cooperation with the slide plate 4 to facilitate the adjustment of the left and right spacing of the slide plate 4. The sliding holes on the surface of the slide plate 4 are longitudinally slidably connected with positioning columns 7. The outer arc surfaces of the positioning columns 7 are movably sleeved with tension springs 8. One end of the tension spring 8 close to the middle partition of the housing 1 is fixedly connected to the inner wall of the sliding hole of the slide plate 4, and the other end of the tension spring 8 is fixedly connected to the positioning column 7. Under the elastic force of the tension spring 8, the semicircular end of the positioning column 7 is inserted into the interior of the positioning hole 6. The adjusting rod 9 includes a screw 91, which is rotatably connected between the left and right inner walls of the housing 1, and the thread directions of the left and right ends of the screw 91 are opposite. The screw 91 is installed in cooperation with the slide plate 4. The adjusting rod 9 includes an adjusting plate 92 and a spring 93. The adjusting plate 92 is respectively threadedly connected to the left and right ends of the screw 91. The adjusting plate 92 is slidably connected to the inside of the housing 1 in a transverse manner. A spring 93 is arranged between the adjusting plate 92 and the slide plate 4. The spring 93 is movably sleeved on the outer arc surface of the screw 91. When the screw 91 rotates, the adjusting plate 92 is driven to move under the limit of the housing 1 through the threaded connection between the screw 91 and the adjusting plate 92, overcoming the elastic force of the spring 93, so that the distance between the adjusting plate 92 and the slide plate 4 is reduced. Under the elastic force of the spring 93, a force is applied to the semicircular end of the positioning column 7. When the elastic force of the spring 93 reaches a certain value, it will overcome the tension spring. The elastic force of 8 pushes the semicircular end of the positioning column 7 to leave the inside of the positioning hole 6, and cancels the limit on the slide plate 4. At this time, under the elastic force of the spring 93, the two slide plates 4 corresponding to the lateral position are pushed to move relative to each other. A single-chip microcomputer 10 is arranged inside the shell 1. The input end of the single-chip microcomputer 10 is electrically connected to an external power supply to control the start and stop of the overall device. Motors 11 are respectively arranged on the left side of the shell 1. The right ends of the output shafts of the motors 11 are respectively fixedly connected to the screw rods 91. The input ends of the motors 11 are electrically connected to the input ends of the single-chip microcomputer 10 to provide power for the rotation of the screw rods 91. Optical fiber lines 12 are installed inside the signal input head 2 and the signal output head 3 to facilitate the connection of the overall device with the OCT equipment.

[0022] The working principle of the OCT-specific wavelength ultra-bandwidth high-speed optical fiber delay line provided by the utility model is as follows: when in use, the overall device is connected to the OCT device through the optical fiber line 12. During the operation of the OCT device, the working signal of the OCT device is transmitted at high speed based on the extremely short wavelength signal and the spectrum with a large bandwidth. During the optical signal transmission process, the optical signal enters the shell 1 through the signal input head 2, and the optical signal is reflected by the delayed reflection lens 5 to guide the propagation path of the optical signal, and finally transmitted from the signal output head 3. The signal of the OCT device is delayed by the principle of optical signal propagation in the optical fiber. At the same time, the motor 11 can be started by the single-chip microcomputer 10, and the output shaft of the motor 11 drives the screw 91 to rotate. Through the threaded connection between the screw 91 and the adjustment plate 92, the adjustment plate 92 is driven to move under the limit of the shell 1 to overcome the elastic force of the spring 93, so that the adjustment plate 9 2 and the slide plate 4 are reduced, and under the elastic force of the spring 93, a force is applied to the semicircular end of the positioning column 7. When the elastic force of the spring 93 reaches a certain value, it will overcome the elastic force of the tension spring 8, push the semicircular end of the positioning column 7 to leave the interior of the positioning hole 6, and cancel the limit on the slide plate 4. At this time, under the elastic force of the spring 93, the two slide plates 4 corresponding to the lateral position are pushed to move relatively, the left and right spacing of the delayed reflection lens 5 is reduced, the propagation length of the optical signal is increased, and the delay time of the optical signal is adjusted. During the adjustment process, as the slide plate 4 moves, when the positioning column 7 coincides with the positioning hole 6, under the elastic force of the tension spring 8, the semicircular end of the positioning column 7 is reinserted into the interior of the positioning hole 6, and at the same time, a part of the elastic force of the spring 93 is released. The spring 93 needs to be contracted again to push the slide plate 4 to move, and the slide plate 4 is adjusted to a fixed distance, so that the adjustment of the optical fiber delay line is more accurate.

[0023] It is worth noting that the microcontroller 10 disclosed in the above embodiment can use a PIC16F1823-I / P model microcontroller, and the motor 11 can be freely configured according to the actual application scenario. It is recommended to use a 3M57-42A model stepper motor. The microcontroller 10 controls the operation of the motor 11 using methods commonly used in the prior art.

[0024] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. OCT dedicated wavelength ultra-wideband high-speed optical fiber delay line, characterized by: It comprises a housing (1); The shell (1) is provided with a signal input head (2) at its left end and a signal output head (3) at its right end. The inside of the shell (1) is connected with slide plates (4) in a transverse sliding manner. The two slide plates (4) at corresponding transverse positions are provided with delayed reflection lenses (5) on their opposite inner sides. Positioning holes (6) are provided on the surfaces of the partitions in the middle of the shell (1). Positioning columns (7) are installed on the surfaces of the slide plates (4). The semicircular ends of the positioning columns (7) are plugged into the positioning holes (6). An adjusting rod (9) is installed between the left and right inner walls of the shell (1). The adjusting rod (9) is installed in coordination with the slide plates (4).

2. The OCT-specific ultra-wideband high-speed optical fiber delay line according to claim 1, characterized in that: The sliding holes on the surface of the slide plate (4) are longitudinally slidably connected with positioning columns (7), and the outer arc surfaces of the positioning columns (7) are movably sleeved with tension springs (8), one end of the tension spring (8) close to the middle partition of the shell (1) is fixedly connected to the inner wall of the sliding hole of the slide plate (4), and the other end of the tension spring (8) is fixedly connected to the positioning columns (7).

3. The OCT-specific ultra-wideband high-speed optical fiber delay line according to claim 1, characterized in that: The adjusting rod (9) comprises a screw rod (91) which is rotatably connected between the left and right inner walls of the housing (1). The screw threads at the left and right ends of the screw rod (91) are in opposite directions. The screw rod (91) is mounted in cooperation with the slide plate (4).

4. The OCT-specific ultra-wideband high-speed optical fiber delay line according to claim 3, characterized in that: The adjusting rod (9) comprises an adjusting plate (92) and a spring (93). The adjusting plate (92) is respectively threadedly connected to the left and right ends of the screw rod (91). The adjusting plate (92) is slidably connected to the inside of the housing (1) in a transverse manner. A spring (93) is provided between the adjusting plate (92) and the slide plate (4). The spring (93) is movably sleeved on the outer arc surface of the screw rod (91).

5. The OCT-specific wavelength ultra-wideband high-speed optical fiber delay line according to claim 3, characterized in that: A single-chip microcomputer (10) is arranged inside the housing (1), and an input end of the single-chip microcomputer (10) is electrically connected to an external power source.

6. The OCT-specific wavelength ultra-wideband high-speed optical fiber delay line according to claim 5, characterized in that: The left side of the housing (1) is provided with a motor (11), the right end of the output shaft of the motor (11) is fixedly connected to the screw rod (91), and the input end of the motor (11) is electrically connected to the input end of the single chip computer (10).

7. The OCT-specific ultra-wideband high-speed optical fiber delay line according to claim 1, characterized in that: Optical fiber lines (12) are installed inside the signal input head (2) and the signal output head (3).

Images