CN210742554U

CN210742554U - Optical fiber assembling device with fiber core direction adjusting function

Info

Publication number: CN210742554U
Application number: CN201921458153.5U
Authority: CN
Inventors: 邹支农
Original assignee: Jiangxi Tfc Optical Communication Co ltd
Current assignee: Jiangxi Tfc Optical Communication Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-06-12
Anticipated expiration: 2029-09-04

Abstract

The utility model relates to an optic fibre assembly quality with fibre core direction regulatory function, including the V groove fixed station, the apron compresses tightly the subassembly, the optic fibre fixed station, the direction regulation platform, the three-dimensional platform module of transferring of optic fibre, the microscope, the three-dimensional platform module of transferring of CCD, CCD and device bottom plate, device bottom plate length and width direction are the X axle direction respectively, the Y axle direction, use perpendicular to device bottom plate plane direction to be the Z axle direction, CCD, the V groove fixed station sets gradually on the X axle direction with the optic fibre fixed station, the V groove fixed station, the apron compresses tightly subassembly and microscope and sets gradually on the Z axle direction, the V groove fixed station passes through the V groove and adjusts the base and is connected with the device bottom plate, the optic fibre fixed station passes through the three-dimensional platform module of transferring of optic fibre and is connected with the device bottom plate, the three-dimensional platform module of transferring of optic fibre, the three-dimensional platform module of CCD compresses. The device has the advantages of avoiding the risk of crushing products, meeting the production requirements of products with multiple specifications and being adjustable in fiber core direction.

Description

Optical fiber assembling device with fiber core direction adjusting function

Technical Field

The utility model relates to a communication product makes technical field, especially an optic fibre assembly quality with fibre core direction regulatory function.

Background

The Fiber Array (FA) is mainly used for connecting optical waveguides, controlling the propagation direction of light, controlling optical coupling among the optical waveguides, between devices and between the optical waveguides and the devices, is applied to planar optical waveguide devices, arrayed waveguide gratings, active and passive Array optical Fiber devices, multi-channel micro-optical modules and the like, and is connected by welding, laser welding and gluing, and the Fiber Array assembling and positioning equipment in the prior art has the following defects:

1. the clamping force of the spring cannot be adjusted, and the cover plate is easy to clamp and collapse;

2. limited by the FA size;

3, the assembly positions of the V-shaped groove, the cover plate and the optical fiber cannot be visually judged;

4. the production efficiency is low, the fiber core direction position of the optical fiber can not be adjusted, and the mass production can not be realized.

Therefore, it is desirable to design an optical fiber assembling apparatus having a core direction adjusting function to solve the above-mentioned disadvantages.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is in order to overcome prior art not enough and provide an optic fibre assembly quality with fibre core direction regulatory function, has and avoids and collapses the product risk, satisfies the production demand of many specifications product, and the fibre core direction is adjustable, carries out batch production with productivity gain and other advantages.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an optical fiber assembling device with a fiber core direction adjusting function comprises a V-groove fixing platform, a cover plate pressing assembly, an optical fiber fixing platform, a direction adjusting platform, an optical fiber three-dimensional platform adjusting module, a microscope, a CCD three-dimensional platform adjusting module, a CCD image sensor and a device bottom plate uniformly distributed with through holes, wherein the length direction of the device bottom plate is an X-axis direction, the width direction of the device bottom plate is a Y-axis direction, the direction perpendicular to the plane of the device bottom plate is a Z-axis direction, the CCD image sensor, the V-groove fixing platform and the optical fiber fixing platform are sequentially arranged in the X-axis direction, the V-groove fixing platform, the cover plate pressing assembly and the microscope are sequentially arranged in the Z-axis direction, the V-groove fixing platform is connected with the device bottom plate through a V-groove adjusting base, the optical fiber fixing platform is connected with the device bottom plate through the optical fiber three-dimensional platform adjusting module, the direction adjusting platform is arranged on the optical fiber fixing platform in a pressing mode along the X-axis direction, the CCD image sensor is connected with the device bottom plate through the CCD three-dimensional platform adjusting module, the cover plate pressing assembly is connected with the device bottom plate in a sliding mode, the microscope is connected with the device bottom plate in an adjustable mode through a support, and the optical fiber three-dimensional platform adjusting module, the CCD three-dimensional platform adjusting module and the cover plate pressing assembly move along the X axis, the Y axis and the Z axis.

Preferably, the optical fiber fixing table comprises a fixing table body, a positioning plate and a positioning cover plate, a groove is arranged at one end of the fixing table body along the X-axis direction, the other end of the fixing table body is connected with the direction adjusting table, the positioning plate is arranged in the groove and is crimped on the fixing table body through the positioning cover plate, a strip-shaped X-axis through groove is arranged on the upper surface of the positioning plate, the direction adjusting table comprises a rotary positioning piece and two rotary positioning pieces, the two rotary positioning pieces are spliced into a circular hole and are symmetrically arranged with the center of the circular hole, a cylindrical X-axis knob is arranged at one end of the rotary positioning piece, a semi-cylindrical structure is arranged at the other end of the rotary positioning piece, the end of the rotary positioning piece is in a pointed structure, an X-axis U-shaped groove and an annular groove are arranged on the X-axis knob, and a V-shaped, the V-shaped groove is connected with the X-axis U-shaped groove, and the two rotary positioning blocks are clamped with the annular grooves and fixed to the fixed table body.

Preferably, the lower end of the optical fiber fixing table is provided with a Z-axis adjusting plate, a Y-axis adjusting plate and an X-axis adjusting plate which are sequentially connected, and the X-axis adjusting plate is connected with the device bottom plate.

Preferably, the V-groove fixing table comprises a V-groove base, an adjusting positioning block and a convex block, the upper end of the V-groove base is sequentially connected with a supporting block and a fixing positioning block from bottom to top, the fixing positioning block is arranged opposite to the adjusting positioning block, and the end part is provided with a second step groove, the fixed positioning block and the adjusting positioning block are arranged in parallel with the convex block, the convex block is connected with the bottom seat of the V-shaped groove, two Y-axis adjusting blocks are arranged at the top end of the convex block, the two ends of the adjusting positioning block are respectively provided with a Y-axis adjusting nut and a first step groove, the bottom end of the adjusting positioning block is provided with a first fixing column, and a second fixing column is arranged at the top end of the V-shaped groove bottom seat, a spring is clamped between the first fixing column and the second fixing column along the Y-axis direction, and an assembled fiber core V groove is arranged between the first step groove and the second step groove in a pressing mode.

Preferably, the V-groove adjusting base is connected with the device bottom plate and roughly adjusts the V-groove fixing table along the X-axis and Y-axis directions.

Preferably, the cover plate pressing assembly is sequentially connected with an X-shaped sliding rail, a sliding groove, a positioning table, an X-axis pressing sliding table, a Y-axis pressing sliding table, a Z-axis positioning block and a Z-axis pressing assembly from bottom to top, and the X-shaped sliding rail is connected with the device bottom plate.

Preferably, the Z-axis pressing component comprises a handle, a pressing positioning column, a reset spring, a pressing head positioning piece and a pressing head which are sequentially connected from top to bottom, the handle is connected with the Z-axis positioning piece, and the reset spring is sleeved on the pressing positioning column.

Preferably, the CCD three-dimensional stage adjusting module is provided with an X-axis adjusting sliding table, a Y-axis adjusting sliding table and a Z-axis adjusting sliding table which are sequentially connected from bottom to top, the X-axis adjusting sliding table is connected with the device bottom plate, and the Z-axis adjusting sliding table is connected with the CCD image sensor.

Preferably, the microscope is rotatably adjusted around the support and slides along the X axis, the Y axis and the Z axis, a Z axis coarse adjusting knob, a Z axis fine adjusting knob and a magnifying glass are arranged on the microscope along the X axis direction, and the magnifying glass is arranged right above the V groove fixing table.

Preferably, a first light source tube and a second light source tube are arranged on two sides of the V-shaped groove fixing table along the X-axis direction, the first light source tube is fixed on the device bottom plate through a support frame, and the second light source tube is connected with the positioning table.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the positioning columns are pressed through replacing or adjusting the springs, the force of the springs is controlled, and the risk of clamping and collapsing products is avoided;

2. different products are produced without being limited by the size of the products;

3. the direction position of the fiber core can be adjusted and fixed;

4. the batch production is carried out, the production efficiency is improved, and the feeding is convenient and rapid.

Drawings

FIG. 1 is a perspective view of an optical fiber assembling apparatus with a fiber core direction adjusting function according to the present invention;

FIG. 2 is an outline view of the X-shaped slide rail side of the optical fiber assembling apparatus with the fiber core direction adjusting function according to the present invention;

FIG. 3 is a perspective view of an optical fiber fixing table and a direction adjusting table of the optical fiber assembling apparatus with a fiber core direction adjusting function according to the present invention;

FIG. 4 is a perspective view of a V-groove fixing table of the optical fiber assembling apparatus with a fiber core direction adjusting function according to the present invention;

FIG. 5 is a perspective view of a cover plate pressing assembly of the optical fiber assembling apparatus with a fiber core direction adjusting function according to the present invention;

wherein: 1. a V-groove fixing table; 11. a Y-axis adjusting nut; 12. adjusting a positioning block; 120. A first step groove; 13. a V-groove base; 130. a second stepped groove; 14. a first fixed column; 15. a spring; 16. a second fixed column; 17. a support block; 18. fixing a positioning block; 19. a convex block; 190. a Y-axis adjusting block;

2. a cover plate compression assembly; 21. a pressure head; 22. a ram positioning member; 23. the positioning column is pressed tightly; 230. a return spring; 24. a handle; 25. pressing the sliding table by the X axis; 26. pressing the sliding table by the Y axis; 27. a Z-axis positioning block; 28. a positioning table;

3. an optical fiber fixing table; 31. positioning a cover plate; 32. a fixed table body; 33. positioning a plate; 330. An X-axis through groove;

4. a direction adjusting table; 41. rotating the positioning member; 410. an X-axis U-shaped groove; 411. a V-shaped groove; 412. a ring groove; 415. a semi-cylindrical structure; 416. an X-axis knob; 42. rotating the positioning block;

5. an optical fiber three-dimensional tuning module;

6. a microscope; 61. a support; 62. a Z-axis coarse adjustment knob; 63. a Z-axis fine adjustment knob; 65. A magnifying glass;

7. a CCD three-dimensional stage adjusting module; 71. an X-axis adjusting sliding table; 72. a Y-axis adjusting sliding table; 73. A Z-axis adjusting sliding table;

8. a CCD image sensor; 81. a CCD lens;

10. a device chassis; 101. an X-shaped slide rail; 102. a chute; 105. a first light source tube; 106. A second light source tube; 109. and a through hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the attached drawings 1-5, an optical fiber assembling device with a fiber core direction adjusting function comprises a V-groove fixing table 1, a cover plate pressing component 2, an optical fiber fixing table 3, a direction adjusting table 4, an optical fiber three-dimensional adjusting table module 5, a microscope 6, a CCD three-dimensional adjusting table module 7, a CCD image sensor 8 and a device bottom plate 10 uniformly distributed with through holes 109.

The X-axis direction is a direction along the length of the device substrate 10, the Y-axis direction is a direction along the width of the device substrate 10, and the Z-axis direction is a direction perpendicular to the plane of the device substrate 10. CCD image sensor 8, V groove fixed station 1 and optic fibre fixed station 3 set gradually on the X axle direction, and V groove fixed station 1, apron compress tightly subassembly 2 and microscope 6 set gradually on the Z axle direction. The V-groove fixing table 1 is connected with the device bottom plate 10 through the V-groove adjusting base 131, and the optical fiber fixing table 3 is connected with the device bottom plate 10 through the optical fiber three-dimensional adjusting module 5. The adjusting stage 4 is pressed against the optical fiber fixing stage 3 in the X-axis direction. The CCD image sensor 8 is connected with the device bottom plate 10 through the CCD three-dimensional stage adjusting module 7. The cover pressing component 2 is connected with the device bottom plate 10 in a sliding mode. The microscope 6 is adjustably connected to the device base plate 10 via a bracket 61. The optical fiber three-dimensional stage adjusting module 5, the CCD three-dimensional stage adjusting module 7 and the cover plate pressing assembly 2 move along an X axis, a Y axis and a Z axis. The assembly of the product of multiple size specification can be adjusted and suitable according to actual demand. The V-groove adjusting base 131 is adjustably connected to the apparatus base plate 10, and coarsely adjusts the V-groove fixing table 1 in the X-axis and Y-axis directions.

The optical fiber fixing stage 3 includes a fixing stage body 32, a positioning plate 33 and a positioning cover plate 31, a groove is provided at one end of the fixing stage body 32 along the X-axis direction, and the other end is connected with the direction adjusting stage 4. The positioning plate 33 is disposed in the recess and is pressed against the fixed table body 32 by the positioning cover plate 31, and the upper surface of the positioning plate 33 is provided with a strip-shaped X-axis through groove 330. The direction adjustment stage 4 includes a rotary positioning member 41 and two rotary positioning members 42. The rotary positioning blocks 42 are spliced into a circular hole and are symmetrically arranged at the center of the circular hole. One end of the rotary positioning element 41 is provided with a cylindrical X-axis knob 416, the other end of the rotary positioning element 41 is provided with a semi-cylindrical structure 415, the end of the rotary positioning element is provided with a pointed structure, the X-axis knob 416 is provided with an X-axis U-shaped groove 410, the cylindrical surface of the X-axis knob 416 is provided with a ring groove 412, a V-shaped groove 411 is arranged at the position of the circle center of the semi-cylindrical structure 415, the V-shaped groove 411 is connected with the X-axis U-shaped groove 410, and the two rotary positioning blocks 42 are clamped with the ring groove 412 and fixed. The fiber core can be adjusted and positioned according to actual requirements. The lower end of the optical fiber fixing table 3 is provided with a Z-axis adjusting plate 35, a Y-axis adjusting plate 36 and an X-axis adjusting plate 37 which are sequentially connected, and the X-axis adjusting plate 37 is connected with the device bottom plate 10.

The V-groove fixing table 1 comprises a V-groove base 13, an adjusting positioning block 12 and a convex block 19. The upper end of the V-shaped groove base 13 is sequentially connected with a supporting block 17 and a fixed positioning block 18 from bottom to top, the fixed positioning block 18 is arranged opposite to the adjusting positioning block 12, and the end part of the fixed positioning block is provided with a second stepped groove 130. The fixed positioning block 18 and the adjusting positioning block 12 are arranged in parallel with the convex block 19, the convex block 19 is connected with the V-shaped groove bottom base 13, and two Y-axis adjusting blocks 190 are arranged at the top end of the convex block 19. The two ends of the adjusting and positioning block 12 are respectively provided with a Y-axis adjusting nut 11 and a first step groove 120, the bottom end of the adjusting and positioning block 12 is provided with a first fixing column 14, the top end of the V-shaped groove base 13 is provided with a second fixing column 16, a spring 15 is clamped between the first fixing column 14 and the second fixing column 16 along the Y-axis direction, and an assembled fiber core V-shaped groove is arranged between the first step groove 120 and the second step groove 130 in a pressing mode. The spring 15 controls the stress of the clamping V-shaped groove, and prevents the defects of FA stress deformation and the like.

The cover plate pressing component 2 comprises an X-shaped slide rail 101, a slide groove 102, a positioning table 28, an X-axis pressing sliding table 25, a Y-axis pressing sliding table 26, a Z-axis positioning block 27 and a Z-axis pressing component which are sequentially connected from bottom to top. The X-shaped slide 101 is connected to the device base plate 10. The Z-axis pressing component comprises a handle 24, a pressing positioning column 23, a return spring 230, a pressing head positioning piece 22 and a pressing head 21 which are sequentially connected from top to bottom. The return spring 230 is sleeved on the pressing positioning column 23. The handle 24 is connected to the Z-axis positioning block 27. The return spring 230 makes the force of the ram 21 uniform, preventing the cover plate from being damaged.

The CCD three-dimensional stage adjusting module 7 is provided with an X-axis adjusting sliding table 71, a Y-axis adjusting sliding table 72 and a Z-axis adjusting sliding table 73 which are sequentially connected from bottom to top, the X-axis adjusting sliding table 71 is connected with the device bottom plate 10, the Z-axis adjusting sliding table 73 is connected with the CCD image sensor 8, and the CCD lens 81 is right opposite to the V-groove fixing table 1. The CCD image sensor 8 is used to observe the end connection state of the V-groove, the core, and the cover.

The microscope 6 can be rotatably adjusted around the support 61 and can slide along the X axis, the Y axis and the Z axis, a Z axis rough adjusting knob 62, a Z axis fine adjusting knob 63 and a magnifying glass 65 arranged along the Z axis are arranged on the microscope 6 along the X axis direction, and the magnifying glass 65 is arranged right above the V groove fixing table 1. The microscope 6 inspects the top end of the V-groove fixing table 1.

A first light source tube 105 and a second light source tube 106 are arranged on two sides of the V-groove fixing table 1 in the X-axis direction, the first light source tube 105 is fixed on the device bottom plate 10 through a support frame, and the second light source tube 106 is connected with the positioning table 28. The second light source tube 106 facilitates observation of the CCD image sensor 8 and the microscope 6, and the first light source tube 105 can emit ultraviolet light to heat and dry the glue adhered to the cover plate, thereby shortening the setting time of the glue and improving the labor productivity.

Pre-installing a V-groove fixing table, a cover plate pressing assembly, an optical fiber fixing table, a direction adjusting table, an optical fiber three-dimensional table adjusting module, a microscope, a CCD three-dimensional table adjusting module and a CCD image sensor, then carrying out micro-adjustment in the X-axis direction, the Y-axis direction and the Z-axis direction according to actual assembly requirements, enabling a CCD lens and an X-axis through groove to be aligned with a step groove of the V-groove fixing table, fixing an optical fiber in the V-groove by placing a positioning cover plate on a positioning plate, placing the V-groove in the step groove of the V-groove fixing table, clamping the V-groove by adjusting an adjusting positioning block, placing the optical fiber at the bottom of the V-groove, covering the upper cover plate after glue injection, pressing the cover plate on glue by pressing a handle downwards, accelerating the solidification of the glue by heating a V-groove pipe, observing the assembly state through the microscope above the V-groove fixing table and the CCD image sensor at the side wall of the, and after the assembly is finished, loosening the handle, adjusting the positioning block and positioning the cover plate to take out the assembled product, and repeatedly carrying out product assembly operation for batch production.

The utility model provides an optic fibre assembly quality with fibre core direction regulatory function has and avoids the product risk that collapses, satisfies the production demand of many specifications product, and the fibre core direction is adjustable, carries out advantages such as batch production in order to productivity gain.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. An optical fiber assembling apparatus having a function of adjusting a direction of a fiber core, characterized in that: comprises a V-groove fixing table, a cover plate pressing component, an optical fiber fixing table, a direction adjusting table, an optical fiber three-dimensional adjusting table module, a microscope, a CCD three-dimensional adjusting table module, a CCD image sensor and a device bottom plate uniformly distributed with through holes, wherein the length direction of the device bottom plate is the X-axis direction, the width direction of the device bottom plate is the Y-axis direction, the direction vertical to the plane of the device bottom plate is the Z-axis direction, the CCD image sensor, the V-groove fixing table and the optical fiber fixing table are sequentially arranged in the X-axis direction, the V-groove fixing table, the cover plate pressing component and the microscope are sequentially arranged in the Z-axis direction, the V-groove fixing table is connected with the device bottom plate through a V-groove adjusting base, the optical fiber fixing table is connected with the device bottom plate through the optical fiber three-dimensional adjusting table module, and the direction adjusting table is pressed on the optical fiber fixing table along the X-, the CCD image sensor is connected with the device bottom plate through the CCD three-dimensional stage adjusting module, the cover plate compressing assembly is connected with the device bottom plate in a sliding mode, the microscope is connected with the device bottom plate in an adjustable mode through a support, and the optical fiber three-dimensional stage adjusting module, the CCD three-dimensional stage adjusting module and the cover plate compressing assembly move along an X axis, a Y axis and a Z axis.

2. The optical fiber assembling device with the fiber core direction adjusting function according to claim 1, wherein the optical fiber fixing station comprises a fixing station body, a positioning plate and a positioning cover plate, a groove is arranged at one end of the fixing station body along the X-axis direction, and the other end of the fixing station body is connected with the direction adjusting station, the positioning plate is arranged in the groove and is pressed on the fixing station body through the positioning cover plate, a strip-shaped X-axis through groove is arranged on the upper surface of the positioning plate, the direction adjusting station comprises a rotary positioning member and two rotary positioning members, the two rotary positioning members are spliced into a circular hole and are symmetrically arranged with the center of the circular hole, one end of the rotary positioning member is a cylindrical X-axis knob, the other end of the rotary positioning member is a semi-cylindrical structure and the end is a pointed structure, and the X-axis knob is provided with an X-axis U-shaped groove and a ring groove, the circle center position department of semicircle columnar structure is equipped with V type groove, V type groove with X axle U type groove connection, two rotatory locating piece with the annular joint is and fixed extremely the fixed station body.

3. An optical fiber assembling apparatus with a core direction adjusting function as claimed in claim 2, wherein said optical fiber fixing table is provided at a lower end thereof with a Z-axis adjusting plate, a Y-axis adjusting plate and an X-axis adjusting plate connected in sequence, said X-axis adjusting plate being connected to said apparatus base plate.

4. The optical fiber assembling apparatus with fiber core direction adjusting function according to claim 1, wherein the V-groove fixing stage comprises a V-groove base, an adjusting positioning block and a convex block, the V-groove base is sequentially connected with a supporting block and a fixing positioning block from bottom to top, the fixing positioning block is opposite to the adjusting positioning block, and has a second step groove at the end, the fixing positioning block and the adjusting positioning block are arranged in parallel with the convex block, the convex block is connected with the V-groove base, two Y-axis adjusting blocks are arranged at the top end of the convex block, a Y-axis adjusting nut and a first step groove are respectively arranged at the two ends of the adjusting positioning block, a first fixing column is arranged at the bottom end of the adjusting positioning block, a second fixing column is arranged at the top end of the V-groove base, and a spring is clamped between the first fixing column and the second fixing column along the Y-axis direction, and a fiber core V groove for assembly is arranged between the first stepped groove and the second stepped groove in a pressing manner.

5. The optical fiber assembling apparatus with core direction adjusting function of claim 4, wherein said V-groove adjusting base is connected to said apparatus base plate and coarsely adjusts the V-groove fixing stage in X-axis and Y-axis directions.

6. The optical fiber assembling device with the function of adjusting the fiber core direction as claimed in claim 1, wherein the cover plate pressing assembly is sequentially connected with an X-shaped slide rail, a slide groove, a positioning table, an X-axis pressing sliding table, a Y-axis pressing sliding table, a Z-axis positioning block and a Z-axis pressing assembly from bottom to top, and the X-shaped slide rail is connected with the device bottom plate.

7. The optical fiber assembling device with the fiber core direction adjusting function of claim 6, wherein the Z-axis pressing component comprises a handle, a pressing positioning column, a return spring, a pressing head positioning piece and a pressing head which are sequentially connected from top to bottom, the handle is connected with the Z-axis positioning piece, and the return spring is sleeved on the pressing positioning column.

8. The optical fiber assembling device with the function of adjusting the fiber core direction as recited in claim 1, wherein the CCD three-dimensional stage adjusting module is provided with an X-axis adjusting stage, a Y-axis adjusting stage and a Z-axis adjusting stage from bottom to top, which are connected in sequence, the X-axis adjusting stage is connected with the device bottom plate, and the Z-axis adjusting stage is connected with the CCD image sensor.

9. An optical fiber assembling apparatus with a core direction adjusting function according to claim 1, wherein said microscope is rotatably adjustable around a support and slides along an X-axis, a Y-axis and a Z-axis, and said microscope is provided with a Z-axis rough adjusting knob, a Z-axis fine adjusting knob and a magnifying glass arranged along the Z-axis in the X-axis direction, said magnifying glass being arranged right above said V-groove fixing table.

10. An optical fiber assembling apparatus having a core direction adjusting function as claimed in claim 6, wherein a first light source tube and a second light source tube are provided on both sides of said V-groove fixing stage in the X-axis direction, said first light source tube is fixed to said apparatus base plate via a support frame, and said second light source tube is connected to said positioning stage.