CN219064837U - Frock clamp for fast carrying out light transmission test of base filter - Google Patents

Abstract

The utility model relates to a fixture for rapidly carrying out light transmission test on a base filter, which comprises an optical power meter and a fixing seat, wherein the fixing seat is provided with first to third jacks; the first jack is used for installing a base, the first jack is arranged on the top surface of the fixed seat, the base is provided with a first receiving end installing hole, and a 0-degree optical filter opposite to the first receiving end installing hole is arranged in the base; the optical power meter comprises a detection head which is used for being connected with a second jack, and the second jack is opposite to a first mounting hole of a receiving end of the base; a tail fiber adapter is arranged in the third jack, the third jack is arranged right below the first jack, the top of the third jack is communicated with the first jack, and the bottom of the third jack penetrates through the bottom surface of the fixed seat; the advantages are that: the fixture tool is provided with a plurality of jacks for mounting the base, the tail fiber adapter and the optical power meter detecting head, and the material end can find out whether the optical filters are pasted or mixed or not through the inspection of the incoming material base, so that the semi-finished product material loss is avoided.

Description

Frock clamp for fast carrying out light transmission test of base filter

Technical Field

The utility model relates to the field of optical device manufacturing, in particular to a fixture for rapidly performing a light transmission test on a base filter.

Background

As shown in fig. 1, the optical device is schematically configured inside, and optical filters are used to reflect and transmit light, so as to realize single-fiber multi-directional light transmission and reception. As shown in fig. 2, which is a schematic view of the light path inside the base in fig. 1, a 45 ° filter and a 0 ° filter are disposed inside the base, a light source entering the base partially penetrates the 45 ° filter, partially is reflected to the 0 ° filter by the 45 ° filter, and the 0 ° filter transmits light with a desired wavelength. Because the optical filters are in a wrong installation risk, optical filters with different wavelengths can not be judged by naked eyes, and the conventional performance can not be effectively removed by testing at the device and module ends, the client has a significant quality risk (here, it is required to explain that the optical filters with 45 degrees have two functions of transmission and reflection, if the optical filters are in a wrong installation, the optical filters with 0 degrees can generally find abnormality in a material stage, the optical filters with 0 degrees only use the transmission function, the abnormality can not be found in the material stage, and the product is manufactured into BOSA when found in a finished product stage, although the defects can be screened, the semi-finished product loss is caused).

Taking the example of the 0-degree filter passing stop band wavelength of the GPON ONU, the 0-degree filter can pass light with the wavelength range of 1480-1503 nm, reflect light with the wavelength of 1260-1450 & 1530-1620, and the filter mode easy TO mix is a PTO (point-TO-point) filter, and the PTO filter can pass light with the wavelength range of 1470-1620 nm and reflect light with the wavelength of 1260-1360 nm. The comparison shows that the two types of optical filters can simultaneously meet transmission in the wavelength range of 1480-1503 nm and simultaneously meet reflection in the wavelength range of 1260-1360 nm, namely, the situation that transmission wavelengths and reflection wavelengths are overlapped occurs, and under the condition that special isolation tests are not performed, the two types of optical filters are mixed, the abnormal performance of a detection device and a detection module cannot be found, and huge loss is easy to occur.

In the prior art, a complex test program and a formula are adopted to obtain a test value of the isolation degree, and whether the optical filter is wrongly arranged is deduced through the test value of the isolation degree. As the wavelength pass band is overlapped, the difference is that the GPON ONU reflects light with 1550nm wavelength, and the pto P can transmit light with 1550nm wavelength, so as TO infer whether the filter is misplaced or not by calculating the isolation of the filter TO 1550 nm. The theoretical formula of the test procedure is:

ISO=10*Lg（R1/ R2） (1)；

the formula shows the ratio of the responsivity of the receiving end permitted to receive wavelength to the responsivity of the forbidden to receive wavelength, wherein ISO shows the isolation degree, the unit is dB, R1 shows the responsivity of the receiving end permitted to receive wavelength, R2 shows the responsivity of the receiving end forbidden to receive wavelength, and the units of R1 and R2 are A/W. The application formula calculated from the theoretical formula is:

ISO=30+10*Lg(A1/A2) (2)；

in the formula, ISO represents isolation degree, the unit is dB, A1 represents waveform amplitude of a receiving end receiving allowable receiving wavelength, A2 represents waveform amplitude of a receiving end receiving forbidden receiving wavelength, and the units of A1 and A2 are mV, wherein the input optical power of the allowable receiving wavelength is 1uW, and the input optical power of the forbidden receiving wavelength is 1000uW. Aiming at the application formula, the testing method comprises the following steps: and taking a group of GPON ONU products, wherein the receiving end of the GPON ONU products allows the receiving wavelength to be 1490nm, and the receiving end of the GPON ONU products receives the forbidden receiving wavelength to be 1550nm, so that when the isolation degree of the type of components is tested, the 1490nm input optical power is 1uW, the 1550nm input optical power is 1000uW, the amplitudes A1 and A2 of the 1490nm and 1550nm are respectively read, the isolation degree of the 1490/1550 is calculated according to the formula (2), and whether the optical filter is misplaced or not is deduced according to the result of the calculated isolation degree.

The technical scheme for testing the isolation degree has the following defects:

1. the test is complex, more data need to be collected, according to the test method, the amplitude of A1 and A2 need to be collected, the same device needs to switch different wavelengths, although equipment on the market can directly test the isolation, the limitation is very large, only the isolation of one wavelength can be tested, if the isolation of another wavelength needs to be replaced, the equipment hardware needs to be changed, and the upgrade cost is high;

2. only the finished product can be tested, and the calculation formula determines that various test values need to be obtained if the isolation degree is tested, so that the finished product is determined to be manufactured and cannot be screened from the semi-finished product;

3. the large-area test cannot be performed, the product isolation degree is determined by the method, only the spot test can be performed, and the large-area test can cause great cost and time for replacing hardware and equipment.

Based on this, the present application is hereby proposed.

Disclosure of Invention

The utility model aims to provide a fixture for rapidly carrying out light transmission test on a base optical filter, which has a simple and light structure, can effectively solve the problem of wrong adhesion or mixing of the optical device optical filter, can realize rapid and convenient inspection on a production line, can inspect materials, is not limited to inspecting finished optical devices, can find problems at an incoming end, and avoids causing more losses.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

a fixture for rapidly testing the light transmission of a base filter comprises an optical power meter and a fixing seat, wherein the fixing seat is provided with first to third jacks;

the first jack is used for installing a base, the first jack is arranged on the top surface of the fixed seat, the base is provided with a first receiving end installing hole, and a 0-degree optical filter opposite to the first receiving end installing hole is arranged in the base;

the optical power meter comprises a detection head which is used for being connected with a second jack, and the second jack is opposite to a first mounting hole of a receiving end of the base;

and a tail fiber adapter is arranged in the third jack, the third jack is arranged right below the first jack, the top of the third jack is communicated with the first jack, and the bottom of the third jack penetrates through the bottom surface of the fixing seat.

Further, the fixing base comprises a base, a first fixing block detachably connected to the top of the base, a second fixing block detachably connected to the side portion of the first fixing block, a first jack is formed in the first fixing block, a second jack is formed in the second fixing block, and a third jack is formed in the base.

Further, the fixing block comprises a limiting screw, a limiting screw hole is formed in the side portion of the first fixing block, a limiting long hole corresponding to the limiting screw hole is formed in the second fixing block, the limiting long hole is horizontally formed, and the limiting screw penetrates through the limiting long hole and then is connected with the limiting screw hole.

Further, a jacking screw hole communicated with the jack III is formed in the base, a jacking screw is connected in the jacking screw hole in a threaded mode, and the jacking screw is used for jacking the tail fiber adapter in the jack III.

Further, a long groove is formed in the side face of the base, the long groove is vertically arranged and penetrates through the top face and the bottom face of the base, and the bottom face of the long groove is communicated with the third jack. Further, the fixing seat is provided with a ground wire mounting hole.

Further, the first jack is a rectangular hole, and a capacity expansion hole communicated with the first jack is formed in the corner of the first jack.

Further, the third jack has a length greater than the length of the pigtail adapter.

The utility model has the advantages that:

1. the fixture tool is provided with a plurality of jacks for installing the base, the tail fiber adapter and the optical power meter detecting head, and through the inspection of the incoming material base, the material end can find whether the optical filters are pasted or mixed, so that the loss of semi-finished products is avoided, and the fixture is simple and portable in structure;

2. the fixture is used for installing the jack lower end of the tail fiber adapter to penetrate through the base and is used for being connected with a light source, the light source can be replaced according to actual conditions, and the convenience and applicability of use are improved;

3. the clamp is provided with the optical power meter, and the function of zeroing by using the optical power meter is used for realizing rapid light transmission test and improving the production line efficiency;

4. the second fixing block can be used for adjusting the position through the limiting screw and the limiting long hole, so that the probe position of the optical power meter can be finely adjusted to be compatible with different bases.

Drawings

FIG. 1 is a schematic view showing the internal construction of an optical device in the background art;

FIG. 2 is a schematic view of the optical path in the optics base of FIG. 1;

FIG. 3 is a schematic view of a three-dimensional structure of a fixture tool according to an embodiment;

FIG. 4 is a schematic view of the three-dimensional structure of FIG. 3 from another perspective;

FIG. 5 is a schematic view of a three-dimensional configuration of an optical power meter in an embodiment;

FIG. 6 is an exploded view of a base, a first fixed block, and a second fixed block according to the embodiment;

FIG. 7 is a schematic view of a three-dimensional structure of a fixture tool according to an embodiment after a base is installed;

FIG. 8 is a schematic cross-sectional view of FIG. 7;

FIG. 9 is an enlarged schematic view of portion A of FIG. 8;

description of the reference numerals

1-a base, 11-a jack III, 12-a jacking screw hole, 13-a jacking screw, 14-a ground wire mounting hole and 15-a long groove; 2-a fixed block I, 21-a jack I, 22-a capacity expansion hole, 23-a limit screw and 24-a limit screw hole; 3-a second fixed block, 31-a second jack and 32-a limiting long hole; 4-optical power meter, 41-probe; a 5-pigtail adapter; 6-base, 61-0 degree filter, 62-45 degree filter, 63-receiving end mounting hole I, 64-receiving end mounting hole II.

Detailed Description

The present utility model is described in further detail below with reference to examples, wherein "upper", "lower", "left", "right", "front", "rear" are based on the coordinate system of fig. 3.

The embodiment provides a fixture for fast testing light transmittance of a base filter, as shown in fig. 3 to 6, the fixture comprises an optical power meter 4, a base 1, a first fixing block 2 and a second fixing block 3, wherein the base 1 is a rectangular block and has a certain height, the first fixing block 2 is a rectangular plate arranged horizontally, and the second fixing block 3 is a plate arranged vertically.

The first fixing block 2 is detachably connected to the top surface of the base 1 through a bolt, the middle part of the front side of the first fixing block 2 is provided with a first jack 21, the first jack 21 is used for installing the base 6 (as shown in fig. 2, the base 6 is provided with a first receiving end installing hole 63 and a second receiving installing hole for installing the detector PD, a 0-degree optical filter 61 and a 45-degree optical filter 62 are fixed in the base 6, the 0-degree optical filter 61 is opposite to the first receiving end installing hole 63, and the 45-degree optical filter 62 is opposite to the second receiving end installing hole 64). The first fixed block 2 is detachably connected with the base 1, so that the first fixed block 2 can be conveniently replaced to adapt to bases 6 with different sizes.

The front side of the first fixed block 2 is detachably connected with the second fixed block 3, the middle part of the second fixed block 3 is provided with the second jack 31, and after the base 6 is inserted into the first jack 21 of the first fixed block 2, the first receiving end mounting hole 63 of the base 6 is opposite to the second jack 31. The optical power meter 4 comprises a probe 41, and when the probe 41 is fixed on the second jack 31, the probe 41 is opposite to the first receiving end mounting hole 63 of the base 6, i.e. opposite to the 0-degree optical filter 61 in the base 6, and can be used for measuring the optical power transmitted from the 0-degree optical filter 61. The detachable connection between the fixed block I2 and the fixed block II 3 is adjustable connection, and comprises a limiting screw hole 24 formed in the front side surface of the fixed block I2, a limiting long hole 32 formed in the fixed block II 3 and opposite to the limiting screw hole 24, and a limiting screw 23, wherein the limiting long hole 32 is horizontally arranged left and right, and the limiting screw 23 penetrates through the limiting long hole 32 and then is connected with the limiting screw hole 24. By unscrewing the limit screw 23, the left-right movement of the second fixed block 3 can be realized, and the position calibration of the probe 41 of the optical power meter 4 can be realized so as to be compatible with different bases 6. (in the figures, the limit slot 32 may not appear to be as large as a slot, since the actual adjustment required is only fine adjustment, so the limit slot 32 is only slightly larger than the limit screw 23).

The base 1 is provided with a jack III 11 which is vertically arranged, the jack III 11 is positioned under the jack I21 and penetrates through the top and the bottom of the base 1, and the tail fiber adapter 5 is arranged in the jack III 11. After the first fixing block 2 and the base 1 are installed and fixed, the first jack 21 and the third jack 11 are communicated, so that light can enter the base 6 through the tail fiber adapter 5. Further, a tightening screw hole 12 communicated with the third jack 11 is formed in the base 1, a tightening screw 13 is connected to the inner thread of the tightening screw hole 12, and the tightening screw 13 is used for tightening the tail fiber adapter 5 in the third jack 11, so that the tail fiber adapter 5 is fixed.

As shown in fig. 7 to 9, the fixture is used as follows (taking the test GPON ONU isolation as an example, the 0 ° filter 61 is required to pass 1490nm light, and reflect 1550nm light):

s1, selecting a proper first fixing block 2 to fix on a base 1, installing a second fixing block 3, and inserting a detection head 41 of an optical power meter 4 into a second jack 31;

s2, placing materials, and inserting the base 6 into the first jack 21, wherein the first receiving end mounting hole 63 is opposite to the detecting head 41 of the optical power meter 4;

s3, position calibration, namely adding a 1490nm light source from the bottom of the jack III 11, enabling the light source to enter the base 6 through the tail fiber adapter 5, reflecting the light source to the 0-degree light filter 61 through the 45-degree light filter 62 in the base 6, transmitting the light source through the 0-degree light filter 61, detecting the light source by the optical power meter 4, and adjusting the fixing block II 3 leftwards and rightwards by unscrewing the limit screw 23 at the moment so that the numerical value displayed by the optical power meter 4 reaches the maximum;

s4, returning to zero, and adjusting the optical power meter 4 to 0dBm after the value is maximum;

s5, replacing the input light source with 1550nm, wherein if the numerical value displayed on the optical power meter 4 is greatly different from 0dBm, the 0-degree optical filter 61 can transmit 1550 light source, and the error installation of the 0-degree optical filter 61 is indicated; conversely, if the value displayed on the optical power meter 4 is near 0dBm, it indicates that the 0 ° filter 61 is not transmissive 1550 light source, indicating that the 0 ° filter 61 is properly installed.

As shown in fig. 6, a long groove 15 is formed in the middle of the front side surface of the base 1, the long groove 15 is vertically arranged and penetrates through the top surface and the bottom surface of the base 1, and the bottom surface of the long groove 15 is communicated with the third jack 11. Because the tail fiber adapter 5 is arranged in the jack III 11, the situation of inconvenient pulling-out exists, and an external workpiece (such as a screwdriver) can enter the jack III 11 through the long groove 15 by arranging the long groove 15 communicated with the jack III 11, so that the tail fiber adapter 5 is pulled out.

Preferably, the base 1 is further provided with a ground wire mounting hole 14 to facilitate grounding of the fixture tool. Meanwhile, the height of the third jack 11 in the base 1 is required to be larger than the length of the tail fiber adapter 5, so that the optical fiber is prevented from being bent, and the light source can be conveniently and directly injected.

In addition, since the optical device base 6 is a rectangular body, the first jack 21 is a rectangular hole matched with the base 6, but corners of the base 6 are chamfered, corners of the base 6 are sharp, and the peripheral dimension of the sharp-angled base 6 is larger than that of the chamfer-shaped base 6, so that the base 6 is conveniently inserted into the first jack 21, as shown in fig. 6, in this embodiment, a capacity expansion hole 22 communicated with the first jack 21 is formed at the corners of the first jack 21, and the two-shaped bases 6 are conveniently placed into the first jack 21.

The above embodiments are only for illustrating the concept of the present utility model and not for limiting the protection of the claims of the present utility model, and all the insubstantial modifications of the present utility model using the concept shall fall within the protection scope of the present utility model.

Claims (8)

1. The fixture is characterized by comprising an optical power meter and a fixing seat, wherein the fixing seat is provided with first to third jacks;

the first jack is used for installing a base, the first jack is arranged on the top surface of the fixed seat, the base is provided with a first receiving end installing hole, and a 0-degree optical filter opposite to the first receiving end installing hole is arranged in the base;

the optical power meter comprises a detection head which is used for being connected with a second jack, and the second jack is opposite to a first mounting hole of a receiving end of the base;

the third jack is provided with a tail fiber adapter, the third jack is arranged right below the first jack, the top of the third jack is communicated with the first jack, and the bottom of the third jack penetrates through the bottom surface of the fixing seat.

2. The fixture for rapidly performing light transmission test of a substrate filter according to claim 1, wherein the fixing base comprises a base, a first fixing block detachably connected to the top of the base, a second fixing block detachably connected to the side of the first fixing block, a first jack is formed in the first fixing block, a second jack is formed in the second fixing block, and a third jack is formed in the base.

3. The fixture for rapidly performing light transmission test of the base filter according to claim 2, comprising a limiting screw, wherein a limiting screw hole is formed in the side portion of the first fixing block, a limiting long hole corresponding to the limiting screw hole is formed in the second fixing block, the limiting long hole is horizontally arranged, and the limiting screw penetrates through the limiting long hole and then is connected with the limiting screw hole.

4. The fixture for rapidly performing light transmission test of a base filter according to claim 2, wherein the base is provided with a tightening screw hole communicated with the third jack, the tightening screw hole is internally and in threaded connection with a tightening screw, and the tightening screw is used for tightening a tail fiber adapter in the third jack.

5. The fixture for rapidly performing light transmission test of a base filter according to claim 2, wherein the side surface of the base is provided with a long groove, the long groove is vertically arranged and penetrates through the top surface and the bottom surface of the base, and the bottom surface of the long groove is communicated with the third jack.

6. The fixture for rapidly performing light transmission test of a substrate filter according to claim 1, wherein the fixing base is provided with a ground wire mounting hole.

7. The fixture for rapid testing of light transmittance of a substrate filter according to claim 1, wherein the first insertion hole is a rectangular hole, and the corner of the first insertion hole is provided with a capacity expansion hole communicated with the first insertion hole.

8. The fixture for rapidly performing light transmission testing of a base filter according to claim 1, wherein the third insertion hole has a length greater than that of the pigtail adapter.

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