Optical data transmitter

Abstract

The utility model discloses an optical data transmitter, and relates to the technical field of optical communication. Comprising a shell, a diaphragm, an interface, a PCBA assembly, a correction laser assembly, a transmitting assembly and a receiving assembly, and the shell is provided with a first window, a second window and a third window; the interface is arranged on the shell and is electrically connected with the PCBA assembly; the transmitting assembly comprises a collimation laser generator, and a light beam transmitted by the collimation laser generator passes through the first window; the receiving assembly comprises a receiving lens, a photosensitive element and a light intensity control piece, the receiving lens is arranged on the second window, and the photosensitive element and the receiving lens are coaxial; the light intensity control piece is arranged in front of the photosensitive element and is used for shielding or filtering part of laser signals; the correction laser assembly comprises a correction laser so as to reduce the light intensity of laser received by the photosensitive element, and the third window is electrically connected with the PCBA assembly through the correction laser, the interface, the collimation laser generator and the correction laser.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, and in particular to an optical data transmitter. Background Technology

[0002] In industrial stacker crane scenarios, optical data transmitters are used for long-distance data transmission at speeds up to 100M / s. An optical data transmitter typically consists of two modules: a transmitter and a receiver. The transmitter usually uses invisible laser light, while the receiver typically uses photosensitive elements such as CMOS, photoresistors, APDs, or PinPDs. APDs are widely used in optical communication equipment due to their high bandwidth and high sensitivity. Common optical data transmitters have a communication range covering 0.2 meters to 120 meters, with some manufacturers even achieving ranges exceeding 200 meters. To accommodate the unevenness of the guide rails, the transmitter is usually set at a certain emission angle. This results in significant signal intensity differences at the receiving end, requiring appropriate light intensity processing to prevent receiver saturation. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides an optical data transmitter, comprising a housing, a PCBA assembly, an interface, a calibration laser assembly, a transmitting assembly, and a receiving assembly. The housing is provided with a first window, a second window, and a third window. The PCBA assembly, disposed within the housing, includes a power module, a signal receiving module, a signal transmitting module, a signal processing module, and an interface module. The interface is disposed on the housing and electrically connected to the PCBA assembly. The transmitting assembly includes a collimating laser generator, which is disposed within the housing and electrically connected to the PCBA assembly. The first window... The third window is used to receive the laser beam emitted by the collimating laser generator; the receiving assembly includes a receiving lens, a photosensitive element, and a light intensity control element. The receiving lens is disposed on the second window, and the photosensitive element is disposed on the PCBA assembly and coaxial with the receiving lens to receive the laser signal; the light intensity control element is disposed in front of the photosensitive element to block or filter part of the laser signal to reduce the laser light intensity received by the photosensitive element; the calibration laser assembly includes a calibration laser, which is disposed inside the housing and electrically connected to the PCBA assembly, and the third window is used to allow the calibration laser to pass through.

[0004] Preferably, the light intensity control component is bonded to the housing.

[0005] Preferably, the light intensity control component is a light filter.

[0006] Preferably, the light intensity control component is a light-shielding net.

[0007] Preferably, the housing includes a front housing, a rear housing, and a window piece, the front housing and the rear housing forming an accommodating cavity, the window piece being disposed on the front housing, and the first window, the second window and the third window being disposed on the window piece.

[0008] Preferably, it also includes a lens mount, which is disposed within the housing and is used to mount the receiving lens.

[0009] Preferably, the device further includes a mounting bracket disposed on the housing for mounting the optical data transmitter.

[0010] Preferably, the PCBA assembly includes multiple PCBs, which are electrically connected to each other via cables.

[0011] Compared with the prior art, the advantage of this utility model is that a light intensity control component is set on the receiving lens at the receiving end of the optical data transmitter to reduce the intensity of the laser light received by the photosensitive element and ensure the normal operation of the photosensitive element. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an optical data transmitter according to one embodiment of the present invention.

[0013] Figure 2 This is an exploded view of the structure of an optical data transmitter according to an embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of a light-shielding net for an optical data transmitter according to an embodiment of the present invention.

[0015] Figure 4 This is an enlarged schematic diagram of the light-shielding mesh of an optical data transmitter according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures:

[0017] 101. Front housing; 102. Rear housing; 103. Window panel; 1031. First window; 1032. Second window; 1033. Third window;

[0018] 201. Receiving lens; 2011. Clearance hole; 2012. Optical processing area; 202. Light-shielding mesh; 2021. Connecting area; 2022. Light-transmitting area; 2023. Light-shielding area; 203. APD;

[0019] 3. Collimated laser generator;

[0020] 4. Calibrate the laser assembly;

[0021] 5. Lens mount; 501. First through hole; 502. Second through hole; 503. Lens fixing position;

[0022] 601, First PCBA; 602, Second PCBA;

[0023] 7. Install the bracket;

[0024] 8. Interface. Detailed Implementation

[0025] In optical data transmitters used for long-distance communication, the same light intensity is used at the near end and the far end. To improve the performance of the far end, the light intensity emitted by the optical data transmitter is usually adjusted to be larger, which can result in a particularly strong light intensity at the near end. This situation may cause the optical data transmitter to malfunction.

[0026] Based on this, the present invention provides an optical data transmitter that uses a light-blocking net to block part of the light and reduce the light intensity.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] The optical data transmitter disclosed in this utility model includes a housing, an interface, a calibration laser assembly, a transmitting assembly, a receiving assembly, and a PCBA assembly. The PCBA assembly is disposed within the housing and includes a power module, a signal receiving module, a signal transmitting module, a signal processing module, and an interface module.

[0029] refer to Figures 1-4 The structure of this optical data transmitter will be explained. First, according to... Figure 1 and Figure 2 As depicted, the front housing 101 and the rear housing 102 are mechanically and adhesively fixed to form a cavity. A window 103 is provided on the front housing 101 in front of the cavity, and the window 103 has a first window 1031, a second window 1032, and a third window 1033 for light transmission. An interface 8 for communication is provided on the top of the rear housing 102, and a mounting bracket 7 is bolted to the back of the rear housing 102.

[0030] The first PCBA 601 and the second PCBA 602 are fixed to the rear and top surfaces of the cavity respectively by fasteners. The first PCBA 601 and the second PCBA 602 are electrically connected by cables, and the interface 8 is electrically connected to the PCBA 602. The lens mount 5 is fixed to the rear housing 102 by fasteners. The collimating laser generator 3 is soldered onto the first PCBA 601. The first PCBA 601 drives the collimating laser generator 3 to generate a collimated infrared laser detection beam. The detection beam passes through the first through hole 501 reserved on the lens mount 5 and the clearance hole 2011 on the receiving lens 201, and is emitted through the first window 1031.

[0031] The calibration laser assembly 4 is located at the second through hole 502 of the mirror mount and is electrically connected to the first PCBA 601 via a cable. The first PCBA 601 drives the calibration laser assembly 4 to generate a red calibration laser beam, which is emitted through the third window 1033.

[0032] A light-shielding net 202, consisting of multiple square arrays, is bonded and fixed onto a transparent receiving lens 201. The light-shielding net 202 comprises three parts: a connecting area 2021, a light-transmitting area 2022, and a light-shielding area 2023. For ease of processing and use, steel is preferably used for the light-shielding net 202. The connecting area 2021 is used to bond the light-shielding net to the receiving lens 201. The light-transmitting area 2022 consists of a perforated square array, with each square having a length less than 1.00 mm and a spacing greater than 0.500 mm, resulting in an overall light transmittance of approximately 70%. The light-shielding area 2023 consists of the connecting points of the perforated square array, with a light-shielding rate of approximately 30%.

[0033] The receiving lens 201 is fixed on the lens fixing position 503 on the lens mount 5. The optical processing area 2012 of the receiving lens 201 faces the second window 1032. A photosensitive element APD 203 is soldered on the first PCBA 601. APD 203 is spaced apart from the collimating laser generator 3. The receiving lens 201 and APD 203 are coaxially arranged. The detection beam enters through the second window 1032. The optical processing area 2012 of the receiving lens 201 converges the detection beam. The received detection beam is partially blocked when it passes through the light-shielding net 202. The photosensitive element APD 203 receives the detection beam with weakened light intensity.

[0034] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An optical data transmitter, comprising a housing, a PCBA assembly, an interface, a calibration laser assembly, a transmitting assembly, and a receiving assembly, characterized in that, The housing is provided with a first window, a second window, and a third window; The PCBA assembly is disposed within the housing and includes a power module, a signal receiving module, a signal transmitting module, a signal processing module, and an interface module. The interface is disposed on the housing and electrically connected to the PCBA assembly; The emitting assembly includes a collimated laser generator, which is disposed inside the housing and electrically connected to the PCBA assembly. The first window is used for the light beam emitted through the collimated laser generator. The receiving component includes a receiving lens, a photosensitive element, and a light intensity control component. The receiving lens is disposed on the second window, and the photosensitive element is disposed on the PCBA assembly and coaxial with the receiving lens to receive laser signals. The light intensity control component is disposed in front of the photosensitive element to block or filter part of the laser signal, thereby reducing the laser light intensity received by the photosensitive element. The calibration laser assembly includes a calibration laser, which is disposed within a housing and electrically connected to the PCBA assembly. The third window is used for the passage of the calibration laser.

2. An optical data transmitter according to claim 1, characterized in that, The light intensity control component is bonded to the housing.

3. An optical data transmitter according to claim 1, characterized in that, The light intensity control component is a light filter.

4. An optical data transmitter according to claim 1, characterized in that, The light intensity control component is a light-blocking net.

5. An optical data transmitter according to claim 1, characterized in that, The housing includes a front housing, a rear housing, and a window panel. The front housing and the rear housing form an accommodating cavity. The window panel is disposed on the front housing, and the first window, the second window, and the third window are disposed on the window panel.

6. An optical data transmitter according to claim 1, characterized in that, It also includes a lens mount, which is disposed within the housing for mounting the receiving lens.

7. An optical data transmitter according to claim 1, characterized in that, It also includes a mounting bracket, which is disposed on the housing and used to mount the optical data transmitter.

8. An optical data transmitter according to claim 1, characterized in that, The PCBA assembly includes multiple PCBs, which are electrically connected to each other via cables.

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