The content of the invention
In view of this, it is necessary to provide a kind of photoelectric conversion device, it can make between convergent lens and light emitting module and meeting
There is high alignment precision between poly- lens and receipts optical module, so as to ensure the efficiency of transmission of optical signal.
A kind of photoelectric conversion device, it includes circuit board, light emitting module, receives optical module and optical coupling lens.The circuit
Include two spaced locating dowels on plate.The light emitting module and the receipts optical module are installed in the circuit board spaced reciprocally
On.The optical coupling lens include the light entrance face relative with the light emitting module and the receipts optical module, tilt phase with the light entrance face
Reflecting surface even, the first convergent lens for being formed spaced reciprocally on the light entrance face and the second convergent lens and two it is right
Position post.First convergent lens and second convergent lens are corresponding with the reflecting surface.Opened up on the reflecting surface it is fluted, this two
Contraposition post is installed in the bottom of the groove spaced reciprocally.The center of two contraposition posts and the center of two locating dowels are distinguished
It is aligned so that the light emitting module is aligned with first convergent lens, and the receipts optical module is aligned with second convergent lens.
Compared to prior art, the photoelectric conversion device sets two locating dowels on the board, saturating in the optical coupling
It is upper on mirror that two contraposition posts are set, and distinguished in assembling using the center of two contraposition posts and the center of two locating dowels
It is aligned so as to there is high alignment precision, and make the receipts optical module and second meeting between the light emitting module and first convergent lens
There is high alignment precision, so as to ensure the efficiency of transmission of optical signal between poly- lens.
Embodiment
Embodiment of the present invention will be described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, the photoelectric conversion device 100 provided for embodiment of the present invention.The photoelectric conversion device 100 includes
One light emitting module 20, one of circuit board 10, one receives optical module 30 and an optical coupling lens 40.
The circuit board 10 includes a bottom surface 12 and a top surface 14.The bottom surface 12 and the top surface 14 are located at the circuit board 10
Opposite both sides, and the bottom surface 12 is parallel with the top surface 14.The vertical top surface 14 of two locating dowels 16 extends.Present embodiment
In, two locating dowels 16 are cylindrical structure, i.e., the section that each locating dowel 16 is intercepted along flat shape in the direction of the top surface 14
Shape is circle.
The light emitting module 20 and the receipts optical module 30 be installed in spaced reciprocally on the top surface 14 and with the electricity of the circuit board 10
Property connection.The light emitting module 20, the receipts optical module 30 and two locating dowels 16 arrange in alignment, and two locating dowels
16 are distributed between the light emitting module 20 and the receipts optical module 30.In present embodiment, the light emitting module 20 can be vertical resonance
Face laser diode, it is used to convert electrical signals to optical signal and sends out light.The receipts optical module 30 is used to believe light
Number be converted to electric signal and receive the light from outside.The light emitting module 20, the receipts optical module 30 and two locating dowels 16
Arrange and in alignment refer to that the light emitting module 20, the receipts optical module 30 and two locating dowels 16 are centrally located at same straight line
On.
Incorporated by reference to Fig. 2, the optical coupling lens 40 include transparent 42, first convergent lenses 43, one of body
Individual second convergent lens, 44, the 3rd convergent lens 45, the 4th convergent lenses, 46, two contraposition posts 48 and two branch
Support part 49.
The body 42 is for straight triangular prism structure and including 422, reflectings surface 424 of a light entrance face and a light
Exit facet 426.The light entrance face 422 is parallel with the top surface 14.The light-emitting face 426 is vertical with the light entrance face 422.The reflection
Face 424 obliquely connects the light entrance face 422 and the light-emitting face 426.In present embodiment, the reflecting surface 424 enters with the light
The angle penetrated between face 422 and the light-emitting face 426 is 45 degree.A groove 420 is offered on the reflecting surface 424, this is recessed
Groove 420 includes a bottom 421, and the bottom 421 and the light entrance face 422 and the top surface 14 are parallel.
First convergent lens 43 and second convergent lens 44 are formed on the light entrance face 422 spaced reciprocally.Should
3rd convergent lens 45 and the 4th convergent lens 46 are formed on the light-emitting face 426 spaced reciprocally.Two contraposition posts
48 are installed in the bottom 421 spaced reciprocally.In present embodiment, two contraposition posts 48 are cylindrical structure, i.e., each contraposition
Post 48 is circle in the cross sectional shape that the direction of the bottom 421 is intercepted along flat shape, and the chi in the section of each contraposition post 48
It is very little identical with the size in the section of each locating dowel 16, and the size is with respect to first convergent lens 43 and second convergent lens
44 size is much greater.Two supporting parts 49 extend vertically from the light entrance face 422 spaced reciprocally.Due to the body
Portion 42 is transparent, then first convergent lens 43, second meeting can be observed in the surface of the photoelectric conversion device 100
Poly- lens 44 and two contraposition posts 48.Now, first convergent lens 43 that observes, second convergent lens 44 and this two
Individual contraposition post 48 arrange it is in alignment, and two contraposition posts 48 be distributed in first convergent lens 43 and this second assemble it is saturating
Between mirror 44.Position relationship and the light emitting module 20 and this two between first convergent lens 43 and two contraposition posts 48
Position relationship between locating dowel 16 is identical.Position relationship between second convergent lens 44 and two contraposition posts 48 is with being somebody's turn to do
The position relationship received between optical module 30 and two locating dowels 16 is identical.Specifically, the center of first convergent lens 43 point
Two locating dowels 16 are arrived at the center for being clipped to the distance between center of two contraposition posts 48 and the light emitting module 20 respectively
The distance between center all same, the center of second convergent lens 44 arrive respectively between the center of two contraposition posts 48 away from
From the distance between the center that two locating dowels 16 are arrived at the center with the receipts optical module 30 respectively all same.
It is appreciated that two contraposition posts 48 be not limited in present embodiment for cylindrical structure, this two are fixed
Position post 16 is also not limited to the cylindrical structure in present embodiment.Two contraposition posts 48 along flat shape in the bottom 421
The shape in the section that direction is intercepted can be triangle, rectangle or ellipse, correspondingly, two locating dowels 16 along flat shape
Shape in the section that the direction of the top surface 14 is intercepted is identical with the shape of two contraposition posts 48, is also triangle, rectangular
Shape or ellipse.
When assembling the photoelectric conversion device 100, the optical coupling lens 40 are glued on the top surface 14 by viscose glue.Specifically
Ground, the optical coupling lens 40 are carried on the top surface 14 first, now, two supporting parts 49 contradict with the top surface 14;Connect
, staff moves the optical coupling lens 40 while observing two contraposition posts in the surface of the optical coupling lens 40
48 with the relative positions of two locating dowels 16 until observing center and two locating dowels 16 of two contraposition posts 48
Center is respectively aligned to just stop the mobile optical coupling lens 40, and now, two contraposition posts 48 of two locating dowels 16 and this are complete
Overlap, the light emitting module 20 is aligned with first convergent lens 43, and the receipts optical module 30 is aligned with second convergent lens 44.Most
Afterwards, dispensing is carried out so that the optical coupling lens 40 are glued on the top surface 14 in the surrounding of two supporting parts 49.
It is appreciated that the sectional dimension intercepted along flat shape in the direction of the bottom 421 of two contraposition posts 48 with should
The size in the section intercepted along flat shape in the direction of the top surface 14 of two locating dowels 16 can also be to differ, it is only necessary to meet
The center of two contraposition posts 48 and the center of two locating dowels 16 are respectively aligned to, and the size is with respect to first convergent lens
43 and second convergent lens 44 size it is much greater in order to staff observe.
Referring to Fig. 3, during work, the circuit board 10 is powered to the light emitting module 20, and the light emitting module 20 turns electric signal
Change optical signal into and send out light.The light that the light emitting module 20 is sent first enters the body through first convergent lens 43
Portion 42 simultaneously reflexes to the 3rd convergent lens 45 in the form of directional light by the reflecting surface 424, then by the 3rd convergent lens 45
Converge to external fiber (not shown).Correspondingly, extraneous light enters the body 42 and by this through the 4th convergent lens 46
Reflecting surface 424 reflexes to second convergent lens 44, then converges to the receipts optical module 30 by second convergent lens 44.The receipts light
Module 30 converts optical signals to electric signal and handled with transmitting to rear end.
The photoelectric conversion device 100 of present embodiment sets two locating dowels 16 on the circuit board 10, in optical coupling lens
Two contraposition posts 48 are set on 40, and the center and the center of two locating dowels 16 of two contraposition posts 48 are utilized in assembling
It is respectively aligned to so as to there is high alignment precision, and make the receipts optical module 30 between the light emitting module 20 and first convergent lens 43
There is high alignment precision between second convergent lens 44, so as to ensure the efficiency of transmission of optical signal.
It is understood that for the person of ordinary skill of the art, it can be conceived with the technique according to the invention and done
Go out other various corresponding changes and deformation, and all these changes and deformation should all belong to the protection model of the claims in the present invention
Enclose.