CN104142538B - Photoelectric conversion device and optical-fiber coupling connector - Google Patents

Abstract

The invention relates to a photoelectric conversion device, which includes a circuit board, a light receiving module, a light emitting module, an optical coupling lens and a cover. The light receiving module and the light emitting module are fixed on the circuit board at intervals. The optical coupling lens includes a first optical surface and a second optical surface perpendicular to each other, a reflective surface inclined to the first optical surface and the second optical surface, one-to-one correspondence and located on the first optical surface and the second optical surface respectively. The first converging lens and the second converging lens. The optical coupling lens is fixed on the circuit board and aligns the first converging lens with the transceiver optical module at intervals. The shield is fixed on the circuit board, shields the optical coupling lens and exposes only one side where the second optical surface is located. The invention also relates to an optical fiber coupling connector with the photoelectric conversion device. The above-mentioned photoelectric conversion device and optical fiber coupling connector can protect the optical coupling lens when assembling other electronic components on the circuit board by using the shield, so as to prevent the optical coupling lens from being damaged.

Description

Photoelectric conversion device and optical fiber coupling connector

technical field

The invention relates to a photoelectric conversion device and an optical fiber coupling connector with the photoelectric conversion device.

Background technique

A fiber-coupled connector usually includes an optical-to-electrical conversion device and a plurality of optical fibers. Wherein, the photoelectric conversion device includes a circuit board, a light emitting module, a light receiving module and an optical coupling lens. The light-emitting module, the light-receiving module and the optical coupling lens are fixed on the circuit board, and the plurality of optical fibers correspond to the light-emitting module and the light-receiving module one by one. The optical coupling lens reflects light and changes it by 90 degrees when optical coupling is performed between the light emitting module and the optical fiber or optical coupling is performed between the optical fiber and the light receiving module.

After the photoelectric conversion device is fabricated, if other electronic components, such as capacitors and resistors, are to be arranged on the circuit board, they need to be installed on the circuit board by using a mounting tool. During the installation process, it is easy to damage the optical coupling lens due to improper operation or accidental damage.

Contents of the invention

In view of this, it is necessary to provide a photoelectric conversion device and a fiber coupling connector, which can prevent the optical coupling lens from being damaged when assembling other electronic components on the circuit board.

A photoelectric conversion device includes a circuit board, a light emitting module, a light receiving module, an optical coupling lens and a cover. The light-emitting module and the light-receiving module are fixed on the circuit board at intervals. The optical coupling lens includes a first optical surface, a second optical surface perpendicular to the first optical surface, a reflective surface inclined to both the first optical surface and the second optical surface, a plurality of first converging lenses, and a plurality of Second converging lens. The plurality of first converging lenses are arranged on the first optical surface. The plurality of second converging lenses are arranged on the second optical surface and correspond to the first converging lenses one by one. The optical coupling lens is fixed on the circuit board and aligns the plurality of first converging lenses with the light emitting module and the light receiving module at intervals. The reflective surface is used to reflect the parallel light after passing through the first converging lens to the corresponding second converging lens and reflect the parallel light after passing through the plurality of second converging lenses to the first converging lens. The shield is fixed on the circuit board, and the shield shields the optical coupling lens and only exposes one side where the second optical surface is located.

An optical fiber coupling connector includes a plurality of optical fibers and the above-mentioned photoelectric conversion device. Each optical fiber includes a fiber core and a cladding covering the fiber core. The plurality of optical fiber cores are aligned with the plurality of second converging lenses one by one.

Compared with the prior art, the optical fiber coupling connector and the photoelectric conversion device of the present invention use the mask to cover the optical coupling lens and only expose the side where the second optical surface is located, so that other electronic components can be assembled on the circuit board , the shield protects the optical coupling lens to prevent the optical coupling lens from being damaged.

Description of drawings

FIG. 1 is a schematic perspective view of an optical fiber coupling connector provided by an embodiment of the present invention.

FIG. 2 is an exploded schematic diagram of the fiber coupling connector in FIG. 1 .

FIG. 3 is a partially exploded schematic diagram of the fiber coupling connector in FIG. 1 .

FIG. 4 is a schematic cross-sectional view of the fiber coupling connector in FIG. 1 along line IV-IV.

FIG. 5 is an enlarged schematic view of the optical path at the optical fiber coupling connector V in FIG. 4 .

FIG. 6 is an enlarged schematic view of a partial cross-section of the fiber coupling connector in FIG. 1 along line VI-VI.

Description of main component symbols

Fiber Coupler 100 photoelectric conversion device 10 circuit board 12 first surface 122 second surface 124 Lighting module 14 Receiver module 16 optical coupling lens 18 top surface 181 first side 1812 second side 1814 Reflective surface 1816 top groove 1810 bottom surface 182 Bottom groove 1820 first optical surface 1822 front surface 183 gap 1830 second optical surface 1832 back surface 184 first side 185 second side 186 first converging lens 187 second converging lens 188 supporting item 189 mask 19 containment space 190 top wall 191 bottom wall 192 first opening 1920 front wall 193 second opening 1930 back wall 194 first side wall 195 second side wall 196 optical fiber 20 Fiber core twenty two cladding twenty four containment cavity 10a

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , which shows a fiber coupling connector 100 provided by an embodiment of the present invention. The fiber coupling connector 100 includes a photoelectric conversion device 10 and four optical fibers 20 .

Please refer to FIG. 1 and FIG. 2 together. The photoelectric conversion device 10 includes a circuit board 12 , two light emitting modules 14 , two light receiving modules 16 , an optical coupling lens 18 and a cover 19 .

The circuit board 12 includes a first surface 122 and a second surface 124 . The first surface 122 and the second surface 124 are located on opposite sides of the circuit board 12 , and the first surface 122 is parallel to the second surface 124 .

The two light-emitting modules 14 and the two light-receiving modules 16 are fixed on the second surface 124 and are electrically connected to the circuit board 12 . Specifically, the two light emitting modules 14 and the two light receiving modules 16 are sequentially arranged in a straight line. In this embodiment, the two light-emitting modules 14 can be vertical resonant plane laser diodes, which are used to convert electrical signals into optical signals and emit light to the outside. The two light receiving modules 16 are used to receive light from the outside and convert light signals into electrical signals.

Please refer to FIGS. 2 to 5 together, the optical coupling lens 18 includes a top surface 181, a bottom surface 182, a front surface 183, a rear surface 184, a first side 185, a second side 186, four fourth A converging lens 187 , four second converging lenses 188 and a support 189 .

The top surface 181 and the bottom surface 182 are located on opposite sides of the optical coupling lens 18 , and the top surface 181 is parallel to the bottom surface 182 . The front surface 183 and the rear surface 184 are located on opposite sides of the optical coupling lens 18 , and the front surface 183 is parallel to the rear surface 184 . The first side 185 and the second side 186 are located on opposite sides of the optical coupling lens 18 . The front surface 183 , the rear surface 184 , the first side 185 and the second side 186 are vertically connected to the top surface 181 and the bottom surface 182 . The first side 185 obliquely connects the front surface 183 and the rear surface 184 , and the second side 186 obliquely connects the front surface 183 and the rear surface 184 .

The top surface 181 defines a strip-shaped top surface groove 1810 . The top groove 1810 includes a first surface 1812 , a second surface 1814 and a reflective surface 1816 . The first surface 1812 is located at the bottom of the top groove 1810 and parallel to the top surface 181 . The second surface 1814 is located on one side of the top surface groove 1810 and vertically connected to the first surface 1812 and the top surface 181 . The reflective surface 1816 is located on the other side of the top surface groove 1810 and is obliquely connected to the first surface 1812 and the top surface 181 .

The bottom surface 182 defines a cuboid bottom surface groove 1820 . The bottom groove 1820 includes a first optical surface 1822 . The first optical surface 1822 is located at the bottom of the bottom surface groove 1820 and is parallel to the top surface 181 and the bottom surface 182 .

The front surface 183 defines a notch 1830 . The notch 1830 includes a second optical surface 1832 . The second optical surface 1832 is recessed toward the rear surface 184 relative to the front surface 183 . The second optical surface 1832 is parallel to the front surface 183 and the rear surface 184 , that is, the second optical surface 1832 is perpendicular to the top surface 181 , the bottom surface 182 and the first optical surface 1822 .

The four first converging lenses 187 are all disposed on the first optical surface 1822 . Specifically, the four first converging lenses 187 are arranged in a straight line and aligned with the two light emitting modules 14 and the two light receiving modules 16 one by one. In this embodiment, the four first converging lenses 187 are all convex lenses.

The four second converging lenses 188 are all disposed on the second optical surface 1832 . Specifically, the four second converging lenses 188 are arranged in a straight line and correspond to the four first converging lenses 187 one by one. In this embodiment, the four second converging lenses 188 are all convex lenses.

The supporting member 189 is a rectangular frame. The supporting member 189 extends perpendicular to the bottom surface 182 and away from the top surface 181 , and the supporting member 189 surrounds the groove 1820 on the bottom surface.

The cover 19 includes a top wall 191 , a bottom wall 192 , a front wall 193 , a rear wall 194 , a first side wall 195 and a second side wall 196 . The front wall 193, the rear wall 194, the first side wall 195 and the second side wall 196 are all vertically connected to the top wall 191 and the bottom wall 192, and the front wall 193, the rear wall 194, the first The side wall 195 , the second side wall 196 , the top wall 191 and the bottom wall 192 define a receiving space 190 . The first side wall 195 and the second side wall 196 are vertically connected to the front wall 193 and the rear wall 194 . The bottom wall 192 bears on the second surface 124 and defines a first opening 1920 . The front wall 193 defines a second opening 1930 . Both the first opening 1920 and the second opening 1930 communicate with the receiving space 190 . In this embodiment, the mask 19 is made of high temperature resistant material, such as fiber-reinforced polypropylene (PP) or ceramics.

The four optical fibers 20 correspond to the four second converging lenses 188 one by one. Each optical fiber 20 includes a cylindrical fiber core 22 and a cladding 24 covering the fiber core 22 . The four fiber cores 22 are aligned with the four second converging lenses 188 one by one.

When assembling the photoelectric conversion device 10 , firstly, the two light emitting modules 14 and the two light receiving modules 16 are fixed on the second surface 124 of the circuit board 12 . Next, the supporting member 189 is connected to the second surface 124 of the circuit board 12 by gluing to fix the optical coupling lens 18 on the second surface 124 . Specifically, a housing cavity 10a is formed between the first optical surface 1822 and the circuit board 12, and the two light emitting modules 14 and the two light receiving modules 16 are accommodated in the housing cavity 10a and are connected with the four first The converging lenses 187 are aligned one by one. At this time, the four first converging lenses 187 are flipped 90 degrees and aligned with the four second converging lenses 188 one by one. Finally, the cover 19 is connected to the second surface 124 of the circuit board 12 by gluing so that the optical coupling lens 18, the light-emitting module 14 and the light-receiving module 16 are all accommodated in the accommodation space 190. The optical coupling lens 18 is not in contact with the mask 19 . At this time, the rear wall 194 is aligned with and covers the rear surface 184, the first side wall 195 is aligned with and covers the first side 185, and the second side wall 196 is aligned with and covers the second side 186. , the front surface 183 is exposed from the second opening 1930 . If other electronic components are assembled on the circuit board 12, the cover 19 will protect the optical coupling lens 18, the light-emitting module 14 and the light-receiving module 16 accommodated therein, preventing the optical coupling lens 18, The light emitting module 14 and the light receiving module 16 are damaged.

When working, please refer to FIG. 4 and FIG. 5 , the circuit board 12 supplies electricity to the light-emitting module 14 , and the light-emitting module 14 converts electrical signals into optical signals and emits light L1 outward. The light L1 emitted by the light emitting module 14 is converted into a parallel light L2 by the corresponding first converging lens 187 and enters the optical coupling lens 18, and then the parallel light L2 is reflected by the reflecting surface 1816 to form a parallel light L3, and finally the parallel light L3 is The second converging lens 188 converges to form the converging light L4 into the corresponding optical fiber core 22 .

Correspondingly, please refer to FIG. 6 , the light from the optical fiber 20 enters the optical coupling lens 18 in the form of parallel rays after passing through the second converging lens 188 , and then is reflected by the reflecting surface 1816 and changed by 90 degrees and is converged by the first converging lens 188 . The lens 187 converges into the corresponding light receiving module 16 . The optical receiving module 16 converts the optical signal into an electrical signal for transmission to the backend for processing.

The optical fiber coupling connector 100 and the photoelectric conversion device 10 in this embodiment use the rear wall 194 of the shield 19 to align and cover the rear surface 184, and the first side wall 195 aligns and covers the first side surface 185, the second side wall 196 is aligned and covers the second side 186, and the front surface 183 is exposed from the second opening 1930, so that when other electronic components are assembled on the circuit board 12, the cover 19 The light-coupling lens 18 , the light-emitting module 14 and the light-receiving module 16 accommodated therein all play a protective role to prevent the light-coupling lens 18 , the light-emitting module 14 and the light-receiving module 16 from being damaged. In addition, if these electronic components are assembled on the circuit board 12 using the SMT process, the SMT process generally requires a higher temperature and a longer time, because the mask 19 is made of fiber-reinforced polypropylene (PP) or ceramics, etc. If it is made of high temperature resistant material, the shield 19 can not only prevent the optical coupling lens 18, the light emitting module 14 and the light receiving module 16 from being damaged by mechanical impact, but also avoid damage caused by high temperature. Of course, in other implementation manners, the mask 19 can also choose other materials, as long as it can withstand the working temperature in the SMT process.

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (9)

1. a kind of photoelectric conversion device, it includes circuit board, light emitting module, receives optical module and optical coupling lens, the luminous mould Block and the receipts optical module spaced reciprocally it is fixed on the board, the optical coupling lens include the first optical surface, with this first The second vertical optical surface of optical surface and first optical surface and the inclined reflecting surface of second optical surface, multiple first meetings Poly- lens and multiple second convergent lenses, the plurality of first convergent lens are arranged on first optical surface, and the plurality of second Convergent lens is arranged on second optical surface and corresponded with first convergent lens, and the optical coupling lens are installed in the electricity On the plate of road and make the plurality of first convergent lens and the light emitting module and the receipts optical module spaced-apart alignment, the reflecting surface is used for will be through Parallel rays after first convergent lens reflexes to corresponding second convergent lens and will be flat after second convergent lens Row light reflexes to corresponding first convergent lens, it is characterised in that the photoelectric conversion device also includes shade, and the shade is fixed On the board, the shade covers the optical coupling lens and only exposes the side where second optical surface.

2. photoelectric conversion device as claimed in claim 1, it is characterised in that the shade is by adding fine polypropylene or ceramics to make Into.

3. photoelectric conversion device as claimed in claim 1, it is characterised in that the optical coupling lens include top surface and the top surface Parallel opposite bottom surface, preceding surface, parallel with the preceding surface opposite rear surface, first side and second side, the preceding surface, The rear surface, the first side and the second side vertically connect the top surface and the bottom surface, and the first side is obliquely connected The preceding surface and the rear surface, the second side obliquely connect the preceding surface and the rear surface and relative with the first side, Open up jagged on the preceding surface, the bottom surface of the breach is second optical surface, and the shade covers the top surface, the rear surface, is somebody's turn to do First side and the second side and the exposure preceding surface.

4. photoelectric conversion device as claimed in claim 3, it is characterised in that the shade includes roof, phase parallel with the roof The bottom wall of the back of the body, antetheca, opposite rear wall parallel with the antetheca, the first side wall, opposite second sidewall parallel with the first side wall And receiving space, the antetheca, the rear wall, the first side wall and the second sidewall vertically connect the roof and the bottom wall, are somebody's turn to do The first side wall and the second sidewall vertically connect the antetheca and the rear wall, and bottom wall carrying on the board and offers the One opening, the antetheca offers the second opening, and first opening and second opening are connected with the receiving space, the optical coupling Lens, the light emitting module and the receipts optical module are housed in the receiving space, and the rear surface is relative with the rear wall, first side Face is relative with the first side wall, and the second side is relative with the second sidewall, and the preceding surface is exposed from second opening.

5. photoelectric conversion device as claimed in claim 4, it is characterised in that the top surface offers the top surface groove of bar shaped, should Top surface groove includes first face parallel with the top surface, vertical the second face for connecting first face and the top surface and tilts connection First face and the reflecting surface of the top surface, the bottom surface offer the bottom recesses of cuboid, and the bottom recesses include being located at First optical surface of bottom, first optical surface is parallel with the top surface and the bottom surface.

6. photoelectric conversion device as claimed in claim 5, it is characterised in that extended vertically support member on the bottom surface, the branch Support member surrounds the bottom recesses, and the support member is glued on the board with the formation between first optical surface and the circuit board Host cavity, the light emitting module and the receipts optical module are housed in the host cavity.

7. photoelectric conversion device as claimed in claim 6, it is characterised in that the reflecting surface tilts 45 with respect to first optical surface Degree, the reflecting surface tilts 45 degree with respect to second optical surface.

8. photoelectric conversion device as claimed in claim 6, it is characterised in that the plurality of first convergent lens is arranged in one directly Line, the plurality of second convergent lens arrangement is in alignment, and the plurality of first convergent lens and the plurality of second convergent lens are equal For convex lens.

9. a kind of optical-fiber coupling connector, it includes multifiber and the opto-electronic conversion as described in any one of claim 1 to 8 Device, every optical fiber includes fiber cores and coats the clad of the fiber cores, and the multifiber core is assembled with the plurality of second Lens are aligned one by one.