CN103941357A - Optical module - Google Patents
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- CN103941357A CN103941357A CN201410169468.3A CN201410169468A CN103941357A CN 103941357 A CN103941357 A CN 103941357A CN 201410169468 A CN201410169468 A CN 201410169468A CN 103941357 A CN103941357 A CN 103941357A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 49
- 239000013307 optical fiber Substances 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
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- 238000004891 communication Methods 0.000 abstract description 2
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Abstract
The invention discloses an optical module and relates to the technical field of optical fiber communication. The optical module is used for reducing light spot area after splitting of light beams in order to allow light to enter an optical fiber in a coupling mode conveniently, and reducing weakeness of light intensity in average unit area to some extent to prolong the transmission distance of the light beams in the optical fiber and improve monitoring accuracy on the light beams of a detector. A light emitting device in the optical module is used for emitting light to form a main light beam, part of light in the main light beam enters a light splitting reflective surface and is reflected by the light splitting reflective surface to form one path of light split beam, and the other part of light does not enter the light splitting reflective surface to form one or more paths of light split beams. The light spot area of the light split beams is identical to that of the main light beam. An optical fiber interface is used for receiving a path of the light split beams to perform light transmission, and the detector is used for receiving one path of the rest of the light split beams to perform photoelectric monitoring.
Description
Technical field
The present invention relates to technical field of optical fiber communication, relate in particular to a kind of optical module.
Background technology
At present, fiber optic network is the main thoroughfare of internet information exchange, and optical module is the important devices in fiber optic network.The functions such as Guang mono-tunnel is multiplex in order to realize, the power monitoring of luminescent device, need optical module Jiang Yi road light to carry out shunt and process.
In prior art, the light splitting of light beam is generally adopted the principle of work of part reflection and part refraction.As shown in Figure 1, main beam S arrives behind spectrum groupware inclined-plane 11, a part of light of this main beam obtains divided beams S1 after 11 refractions of spectrum groupware inclined-plane, another part optical fiber of main beam S obtains divided beams S2 after 11 reflections of spectrum groupware inclined-plane, divided beams S1 is after lens 14 are assembled, be coupled into optical fiber 15, divided beams S2, after lens 12 are assembled, enters detector 13.
Wherein, the hot spot that the spot that light beam presents in the time inciding an interface is this light beam.Example, with reference to figure 1, above-mentioned divided beams S1 formed hot spot A1 before assembling without lens 14; Above-mentioned divided beams S2 formed hot spot A2 before assembling without lens 12.Wherein, the schematic diagram of hot spot A1 and hot spot A2 can be with reference to figure 2 (b).For the ease of contrast, Fig. 2 (a) shows main beam S and assembles the hot spot A forming without light splitting and without lens.Because divided beams S1, S2 obtain by reflecting and reflecting respectively, thereby the cross-sectional area of its divided beams S1, S2 (area of light beam on the vertical plane of its transmission direction) is basically identical with the cross-sectional area of main beam S, and then the area of the hot spot A that obtains of divided beams S1, S2 the hot spot A1, the A2 that obtain and main beam S is also basic identical, this point also can embody from Fig. 2 (a) and Fig. 2 (b).And the relation that is coupled with of the area of hot spot and optical fiber, generally speaking hot spot is larger, is more unfavorable for that light is coupled into optical fiber or detector.
In addition, the light intensity of divided beams S1, divided beams S2 is all less than the light intensity of main beam S, and this point can embody from Fig. 3 (a) and Fig. 3 (b).Wherein, to show the light intensity of main beam S center be 1.1 × 10 to Fig. 3 (a)
5cd, successively decreases to marginal position light intensity gradually with center; The light intensity that Fig. 3 (b) shows divided beams S1 or S2 center is 5.5 × 10
4cd, successively decreases to marginal position light intensity gradually with center, and wherein, in Fig. 3 (a) and Fig. 3 (b), transverse axis 0 is depicted as spot center position.
Due to divided beams S1, the cross-sectional area of the cross-sectional area of S2 and main beam S is basically identical, and divided beams S1, the light intensity of divided beams S2 is all less than the light intensity of main beam S, therefore the light intensity of divided beams S1 and divided beams S2 per unit is compared to the light intensity decreasing of main beam S per unit, make the testing result out of true of detector 13 to divided beams S2, simultaneously, because light beam transmission range in optical fiber is subject to the impact of many factors, therefore, in the situation that other conditions are identical, the light intensity of light beam per unit is more weak, transmission range in optical fiber is shorter, therefore, the transmission range of divided beams S1 in optical fiber shortens.
Summary of the invention
Embodiments of the invention provide a kind of optical module, in order to reduce the facula area after light beam light splitting, be beneficial to optically-coupled and enter optical fiber, simultaneously, reduce to a certain extent weakening of per unit light intensity, to improve the transmission range of light beam in optical fiber, and the monitoring degree of accuracy of detector to light beam.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The embodiment of the present invention provides a kind of optical module, comprising: luminescent device, and described luminescent device is used for emitting beam, to form main beam; Described optical module also comprises: point light reflection surface, optical fiber interface and detector; A part of light in described main beam incides described point light reflection surface, is reflected to form a road divided beams by described point of light reflection surface, and in described main beam, another part light does not incide described point light reflection surface to form at least one road divided beams;
The facula area sum of described divided beams equates with the facula area of described main beam;
Described optical fiber interface is used for receiving all divided beams Zhong mono-road divided beams to carry out light transmition, and described detector is used for receiving all the other divided beams Zhong mono-road divided beams to carry out photoelectric monitor.
Optionally, a part of light in described main beam incides described point of light reflection surface, described point of light reflection surface generation total reflection.
Optionally, described point of light reflection surface extend into the degree of depth difference in described main beam transmission light path, described main beam is divided into the divided beams of different proportion.
Optionally, described point of light reflection surface is plane or cambered surface.
Optionally, described point of light reflection surface is annular, and the outer diameter of a circle of described annulus is more than or equal to the diameter of described main beam xsect, and the interior diameter of a circle of described annulus is less than the diameter of described main beam xsect.
Optionally, described optical module also comprises: turn to reflecting surface;
The described reflecting surface that turns to is for changing the transmission direction of described main beam; Described point of light reflection surface stretches in the light path after described main beam transmission direction changes.
The embodiment of the present invention provides a kind of optical module, and this optical module has a point light reflection surface.First, a part of light in described main beam incides described point light reflection surface, is reflected to form a road divided beams by described point of light reflection surface, because a part of light of main beam just incides on point light reflection surface, and the cross-sectional area of a part of light of main beam is less than the cross-sectional area of main beam, and then the facula area that the divided beams being formed by this part light obtains should be less than the main beam facula area that light splitting does not obtain, but the facula area that the divided beams that prior art forms obtains and the main beam facula area that light splitting does not obtain is basic identical, therefore, compared to existing technologies, the facula area that divided beams obtained being reflected to form by above-mentioned point of light reflection surface is less, if this part light need to enter optical fiber, be conducive to optically-coupled and enter optical fiber.
In addition, the energy of the divided beams that this part light forms is less than the not energy of the light beam of light splitting of main beam, simultaneously, the facula area that this part light forms also reduces accordingly compared to the main beam facula area that light splitting does not obtain, the light intensity of the divided beams per unit forming according to the present invention and main beam do not divide the light intensity of light time per unit basic identical, but the light intensity of the divided beams per unit that prior art forms is compared to the light intensity decreasing that main beam does not divide light time per unit, therefore, compared to existing technologies, the light intensity of the divided beams per unit being reflected to form by above-mentioned point of light reflection surface is stronger, can reduce to a certain extent the decay of per unit light intensity, if this part light need to enter detector, can improve the monitoring degree of accuracy of sensitive detection parts to light beam, further, compared to existing technologies, the light intensity of the divided beams per unit being reflected to form by above-mentioned point of light reflection surface is stronger, therefore,, if when light beam transmits in the situation that other conditions are identical in optical fiber, the divided beams being reflected to form by above-mentioned point of light reflection surface can transmit farther distance in optical fiber, that is to say, under square one, per unit light intensity is larger, and propagation distance is far away.
Secondly, in described main beam, do not incide a part of light on described point light reflection surface, its transmission direction is not because described point of light reflection surface changes, to form a road divided beams, same, the light that does not incide point light reflection surface is a part of light of main beam, and the cross-sectional area of a part of light of main beam is less than the cross-sectional area of main beam, and then the facula area that the divided beams being formed by this part light obtains should be less than the main beam facula area that light splitting does not obtain, but the facula area that the divided beams that prior art forms obtains and the main beam facula area that light splitting does not obtain is basic identical, therefore, compared to existing technologies, do not incide the facula area that divided beams that this part light of point light reflection surface forms obtains less, if this part light need to enter optical fiber, be conducive to optically-coupled and enter optical fiber.
In addition, the energy of the divided beams that this part light forms is less than the not energy of the light beam of light splitting of main beam, simultaneously, the facula area that this part light forms also reduces accordingly compared to the main beam facula area that light splitting does not obtain, light intensity and the main beam of the divided beams per unit that this part light forms do not divide the light intensity of light time per unit basic identical, but the light intensity of the divided beams per unit that prior art forms is compared to the light intensity decreasing that main beam does not divide light time per unit, therefore, compared to existing technologies, the light intensity that does not incide the divided beams per unit that this part light of point light reflection surface forms is stronger, can reduce to a certain extent the decay of per unit light intensity, if this part light need to enter detector, can improve the monitoring degree of accuracy of sensitive detection parts to light beam, further, compared to existing technologies, the light intensity of the divided beams per unit being reflected to form by above-mentioned point of light reflection surface is stronger, therefore,, if when light beam transmits in the situation that other conditions are identical in optical fiber, the divided beams being reflected to form by above-mentioned point of light reflection surface can transmit farther distance in optical fiber, that is to say, under square one, per unit light intensity is larger, and propagation distance is far away.
Again, above-mentioned divided beams is to be obtained by a part of light of main beam, a part for the hot spot that the hot spot that each divided beams forms forms for main beam, and therefore, the facula area sum of above-mentioned divided beams equates with the facula area of main beam.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the principle schematic of a kind of light beam light splitting of prior art;
Fig. 2 (a) is the main beam hot spot schematic diagram that light splitting does not form in prior art;
Fig. 2 (b) is the hot spot schematic diagram that in prior art, the divided beams after main beam light splitting forms;
Fig. 3 (a) is the not schematic diagram of the light intensity curve of light splitting of main beam in prior art;
Fig. 3 (b) is the schematic diagram of the light intensity curve of the divided beams after main beam light splitting in prior art;
The principle schematic that a kind of optical module that Fig. 4 provides for the embodiment of the present invention carries out light beam light splitting;
A kind of main beam hot spot schematic diagram that light splitting does not form that Fig. 5 (a) provides for the embodiment of the present invention;
The hot spot schematic diagram that divided beams after the main beam light splitting that Fig. 5 (b) provides for the embodiment of the present invention forms;
Fig. 6 provides the schematic diagram of the light intensity curve of the divided beams after main beam light splitting for the embodiment of the present invention;
The principle schematic that a kind of point of light reflection surface that Fig. 7 provides for the embodiment of the present invention carries out light beam light splitting;
Light splitting schematic diagram when point light reflection surface is annular in the optical module that Fig. 8 provides for the embodiment of the present invention;
The optical module that Fig. 9 provides for the embodiment of the present invention comprises the structural representation while turning to reflecting surface;
The schematic perspective view of a kind of optical module that Figure 10 provides for the embodiment of the present invention;
Optical module shown in a kind of Fig. 9 that Figure 11 provides for the embodiment of the present invention is along the cut-open view of A-A direction;
Spectrum groupware shown in another kind of Fig. 9 that Figure 12 provides for the embodiment of the present invention is along the cut-open view of A-A direction;
The principle schematic that comprises multiple points of light reflection surface time bundle light splitting that Figure 13 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of optical module, and this optical module comprises: luminescent device, light interface, detector and point light reflection surface, and wherein, described luminescent device is used for emitting beam, to form main beam; A part of light in described main beam incides described point light reflection surface, is reflected to form a road divided beams by described point of light reflection surface, and in described main beam, another part light does not incide described point light reflection surface to form at least one road divided beams; The facula area sum of described divided beams equates with the facula area of described main beam; Described optical fiber interface is used for receiving all divided beams Zhong mono-road divided beams to carry out light transmition, and described detector is used for receiving all the other divided beams Zhong mono-road divided beams to carry out photoelectric monitor.
As shown in Figure 4, to comprise luminescent device 20, point light reflection surface 21, optical fiber interface 25 in optical module, detector 23 is example, and the light how point light reflection surface 21 is sent luminescent device 20 carries out light beam light splitting and describes.
Wherein, the light that luminescent device 20 sends forms main beam M through lens 26, divide light reflection surface 21 to stretch in the transmission light path of main beam M, a part of light in described main beam M incides described point light reflection surface 21, reflected (described point of light reflection surface has the function reflecting inciding its surperficial light, and light can not see through this point of light reflection surface) by described point of light reflection surface 21 to form a road divided beams M1; In described main beam M, another part light does not incide described point light reflection surface 21 to form a road divided beams M2, supposes that described point light reflection surface 21 is divided into described main beam M divided beams M1 and the divided beams M2 of two equal proportions (or cross-sectional area is identical).
Wherein, divided beams M1 formed hot spot B1 before assembling without lens 22, divided beams M2 formed hot spot B2 before assembling without lens 24, wherein, the schematic diagram of hot spot B1 and hot spot B2 can be with reference to figure 5 (b), and the hot spot that main beam M forms without light splitting is as shown in Fig. 5 (a).
Because divided beams M1 obtains a part of light reflection of main beam M by a point light reflection surface 21, divided beams M2 is that a part of light not inciding in main beam on described point light reflection surface 21 forms, thereby the cross-sectional area of divided beams M1, M2 is less than the cross-sectional area of main beam M, and then divided beams M1, M2 assemble after the facula area that obtains be less than the facula area obtaining after main beam M assembles, this point can significantly embody from Fig. 5 (a) and Fig. 5 (b).Because the facula area of divided beams M1, M2 diminishes, therefore utilize optically-coupled to enter detector and optical fiber.
In addition, as shown in Figure 6, divided beams M1 or divided beams M2 light intensity are the most by force 8.0 × 10 to the light intensity curve of divided beams M1, divided beams M2
4cd, and successively decrease gradually to marginal position light intensity with the position that light intensity is the strongest, as can be seen from Figure 6, move to some extent the strongest center of light intensity of the hot spot that divided beams M1 and divided beams M2 form through lens, and this point can well embody in conjunction with the hot spot shown in Fig. 5.And as shown in Fig. 3 (b), the divided beams light intensity obtaining in prior art is the most by force 5.5 × 10
4cd, therefore, the light intensity of the hot spot of the divided beams that the hot spot beam intensity ratio prior art of the divided beams that in the employing embodiment of the present invention, point light reflection surface obtains obtains is compared and is significantly improved.
Simultaneously, due to divided beams M1 and the divided beams M2 two bundle divided beams that are equal proportion, therefore the facula area of divided beams M1 is about the half of the facula area of main beam M, and the light intensity of divided beams M1 is about main beam M light intensity half, therefore, the light intensity of the light intensity of divided beams M1 and divided beams M2 per unit and main beam M per unit is basic identical, can reduce to a certain extent the decay of per unit light intensity; Further, when divided beams M1 enters detector 23 after lens 22 are assembled, can improve the monitoring degree of accuracy of detector 23 to light beam.
In like manner, divided beams M2 is about the half of the facula area of main beam M through the facula area of lens 24, and the light intensity of divided beams M2 is about the light intensity half of main beam M, therefore, the light intensity of the light intensity of divided beams M2 per unit and main beam M per unit is basic identical, and then can reduce to a certain extent the decay of per unit light intensity.Further, if the decling phase of Optical Fiber Transmission is same, the light intensity of the divided beams per unit that the light intensity of divided beams M2 per unit obtains compared to prior art is stronger, therefore, divided beams M2 is coupled in optical fiber 25 through lens 24, can in optical fiber 25, transmit farther distance.
Example, in Fig. 7, only illustrate that point light reflection surface is divided into main beam the principle schematic of three divided beams, optical module that can be shown in Figure 4 for the concrete principle of luminescent device, optical fiber interface, detector and point light reflection surface.Wherein, a part of light in main beam Y incides point light reflection surface 70, is reflected to form divided beams Y1 by described point of light emitting surface 70, and in main beam Y, another part light does not incide described point light reflection surface 70, forms divided beams Y2 and divided beams Y3; Because divided beams Y1, divided beams Y2 and divided beams Y3 are, a part of light of main beam Y obtains, and therefore, the facula area of the facula area sum main beam Y that divided beams Y1, divided beams Y2 form with divided beams Y3 is identical.In the time that optical module comprises a detector and an optical fiber interface, if optical fiber interface receives divided beams Y2 to carry out spread fiber, detector can receive in divided beams Y1 and divided beams Y3 one to carry out photoelectric monitor so.
Optionally, in described main beam M, incide a part of light on described point light reflection surface 21, at described point of light reflection surface 21, total reflection occurs.
Wherein, described total reflection refers to and is mapped to two media interface when light, only produces reflection and do not produce the phenomenon of refraction.When light is during by optically denser medium directive optically thinner medium, refraction angle will be greater than incident angle, and in the time that incident angle increases to a certain numerical value, refraction angle will reach 90 °, incident angle corresponding when refraction angle is 90 ° becomes the cirtical angle of total reflection, at this moment in optically thinner medium, will there will not be refracted ray.As long as when incident angle is more than or equal to the cirtical angle of total reflection, all there is not refraction effect, total reflection that Here it is.Described optically thinner medium and optically denser medium are comparatively speaking, and two kinds of transmission mediums are compared, and refractive index is less, and light transmission speed is therein very fast, are just optically thinner medium; Refractive index is larger, and light propagation rate is therein slower, is just optically denser medium.In embodiments of the present invention, taking point light reflection surface as boundary, in main beam, incide a part of light on described point light reflection surface, from optically denser medium directive optically thinner medium, and described in incide the cirtical angle of total reflection that the described point of incident angle on light reflection surface is more than or equal to described point light reflection surface, there is total reflection at described point of light reflection surface place.
Utilize the principle of total reflection to reflect to obtain divided beams to light beam, can reduce as much as possible the minimizing of divided beams energy, be significantly improved with respect to the energy that in prior art, main beam is obtained to divided beams through the principle of part refraction and part reflection, and then per unit light intensity is also high than prior art per unit light intensity, so, under identical condition, in the time that divided beams is coupled into optical fiber, can transmit farther distance.
Optionally, described point of light reflection surface 21 extend into the degree of depth difference in described main beam M transmission light path, described main beam M is divided into the divided beams of different proportion.
Example, the degree of depth that point light reflection surface 21 described in Fig. 4 extend in described main beam M light path is d, now, a part of light that main beam M is incided its surface by described point of light reflection surface 21 reflects, and forms divided beams M1; If described point of light reflection surface 21 extend in the light path of described main beam M, whole light of described main beam M are reflected, now, the degree of depth that described point of light reflection surface 21 extend in described main beam M light path is D, according to the ratio between d and D, described point of light reflection surface 21 can be divided into main beam M the divided beams of same ratio or different proportion.That is to say, the depth d that described point of light reflection surface 21 extend in described main beam M light path has determined the described point reflection ratio of light reflection surface 21 to light, and different depth d produces the divided beams of different ratios.
Optionally, described point of light reflection surface 21 is plane or cambered surface.
Certainly, the shape of described point of light reflection surface 21 can be for arbitrarily, as long as a described point light reflection surface 21 can reflect its surperficial light of incident, all the other do not have its surperficial light of incident to transmit along original optical path, reach the object of light light splitting.Wherein, in Fig. 4, describe as plane as example taking described point of light reflection surface 21, the principle while being plane with described point of light reflection surface 21 when described point of light reflection surface 21 is cambered surface is identical, does not repeat them here.
Optionally, described point of light reflection surface 21 can be annular, and the outer diameter of a circle of described annulus is more than or equal to the diameter of described main beam xsect, and the interior diameter of a circle of described annulus is less than the diameter of described main beam xsect.
That is to say, a part of light in main beam M incides by the annulus forming between inner circle and cylindrical, and this part of light is reflected by annulus described in this, forms a road divided beams, in main beam, another part light, directly through annulus inner circle, forms a road divided beams.
As shown in Figure 8, the light that luminescent device 20 sends forms main beam M through lens 26, a part of light in main beam M incides by the annulus forming between inner circle and cylindrical, this a part of light is reflected by annulus described in this, (divided beams M1 is reflected and obtains through annulus by the M1a and the M1b that incide on annulus to form a road divided beams M1, after being reflected by annulus, the light M1b that incides annulus in Fig. 8 in order only to show is transferred to the light path schematic diagram of lens 22, identical with the light M1b that incides annulus for the light M1a that incides annulus, be all after the reflection of annulus, to be transferred to lens 22, clear succinct with for Fig. 8), in main beam, another part light is directly through annulus inner circle, form a road divided beams M2.The divided beams M1 and the divided beams M2 that obtain through point light reflection surface of this annular, be identical with the divided beams M1 obtaining in Fig. 4 and divided beams M2 principle, do not repeat them here.
Optionally, as shown in Figure 9, described optical module also comprises: turn to reflecting surface 27;
The described reflecting surface 27 that turns to is for changing the transmission direction of described main beam M; Described point of light reflection surface 21 stretches in the light path after described main beam M transmission direction changes.
As shown in Figure 9, whole light of described main beam M are carried out total reflection by the described reflecting surface 27 that turns to, to change the transmission direction of described main beam M, described in to turn to the total reflection of reflecting surface 27 be identical with the total reflection of described point of light reflection surface 21, do not repeat them here.The main beam M that turns to reflecting surface 27 to change transmission aspect described in process is carried out light beam light splitting by a point light reflection surface 21, and its principle is identical with above-mentioned description, does not repeat them here.
For above-mentioned described optical module, as shown in figure 10, the embodiment of the present invention provides a kind of COB (Chip On Board, chip on board) optical module of encapsulation, and this optical module comprises spectrum groupware 10 and circuit board 20 etc.Be the cut-open view of Figure 10 along A-A direction as shown in figure 11, wherein, described spectrum groupware 10 is integrated by transparent material high-temperature injection, in this spectrum groupware 10, be provided with a point of light reflection surface 1 and one and turn to reflecting surface 2, be respectively used to beam separation and light beam steering, be provided with first lens 3, the second lens 4, the 3rd lens 5; The one side of described spectrum groupware 10 is smooth planes, can directly stick on surface-mounted integrated circuit 20, described spectrum groupware 10 center and other photoelectric device, as concordant on same straight line in luminescent device 7, detector 8 etc., luminescent device 7 and detector 8 can directly be attached on circuit board 20, and their center line drops on spectrum groupware 10 center lines in the projection of 20 of circuit boards; One end of spectrum groupware 10 is optical fiber interface 6, and it is directly connected with optical fiber, and optical fiber can directly insert in it, and divided beams is transferred in optical fiber through this optical fiber interface 6.
Wherein, described first lens 3 turns between reflecting surface 2 and luminescent device 7 described, for the light collimation that described luminescent device 7 is sent, forms the light beam that turns to reflecting surface 2 described in directive; Described the second lens 4, between described point of light reflection surface 1 and detector 8, for assembling reflecting by described point of light reflection surface 1 the first divided beams A obtaining, enter described detector 8; Described the 3rd lens 5 are positioned at the bottom surface of described optical fiber interface 6, for by not assembled by the second divided beams B of described point of light reflection surface 1 total reflection, enter described optical fiber interface 6.
How optical module shown in Figure 11 being carried out to light beam light splitting below describes.Concrete, the light that luminescent device 7 (for example: vertical cavity surface emitting laser, Vertical Cavity Surface Emitting Laser, abbreviation VCSEL) sends is diverging light, there is certain angle of divergence, before the interior transmission of spectrum groupware 10, need first by its collimation.Luminescent device 7 is arranged in the focus of first lens 3, the diverging light sending is through first lens 3, the diverging light collimation that first lens 3 sends luminescent device 7, directional light C after collimation propagates in spectrum groupware 10, arrival turns to reflecting surface 2, turning to reflecting surface 2 and horizontal direction angle is 45 °, now the parallel beam after collimation enters optically thinner medium by optically denser medium, in the time that incident angle is greater than angle of total reflection critical angle, beam emissions total reflection, the cirtical angle of total reflection determines (in the embodiment of the present invention, the cirtical angle of total reflection of hypothesis point light reflection surface is 45 °) by the refractive index of spectrum groupware 10 materials.Due to total reflection effect, there are 90 ° of turnovers in the parallel beam after collimation, and the parallel beam D after turnover continues transmission along the optical axis as shown in the dot-and-dash line in Figure 11.
In Figure 11, a part of light beam in parallel beam D after turnover arrives a point light reflection surface 1, to enter optically thinner medium by optically denser medium equally, in the time that incident angle is greater than the angle of total reflection, arrive the light beam generation total reflection of point light reflection surface 1, due to total reflection effect, this part parallel beam that arrives point light reflection surface 1 is transferred again, form the first divided beams A, the first divided beams A propagates in spectrum groupware 10, arrive the second lens 4, the second lens 4 are assembled the first divided beams A, light after convergence enters in the detector 8 on the focal length that is placed on the second lens 4, realize the light detection to photoelectric device, another part in parallel beam D after turnover is without a point light reflection surface 1, in light transmissive material, continue to transmit along original optical path, form the second divided beams B, the second divided beams B arrives the 3rd lens 5, the axis of the central axis of the second divided beams B and the 3rd lens 5 (in Figure 11 shown in dot-and-dash line) overlaps, the 3rd lens 5 can be assembled the second divided beams B, and the light after assembling enters the optical fiber inserting in optical fiber interface 6, is transferred out by optical fiber.
Certainly, the light beam proportional distribution of the first divided beams A and the second divided beams B can be carried out flexible configuration according to actual requirement, and the degree of depth that can divide light reflection surface 1 to extend in light path by change is determined concrete allocation proportion.
Further, Figure 12 is the distortion of point light reflection surface 1 shown in Figure 11, the angle of point light reflection surface 1 and optical axis (in Figure 12 shown in dot-and-dash line) place plane can change according to actual requirement, can make like this first divided beams A of light beam transfer according to the required direction of reality, and then continue to transmit in light transmissive material, final second lens 4 that arrive, the second lens 4 are assembled the first divided beams A, light after convergence enters in the detector 8 on the focal length that is placed on the second lens 4, realize the light detection of photoelectric device, certainly, the variation of angle will be determined ensureing that incident angle can reach under the prerequisite of the angle of total reflection.
Spectrum groupware shown in Figure 11 and Figure 12 has comprised the design that can realize light path turnover and beam separation, and wherein light beam steering and beam separation do not need the auxiliary realization of extra optical element, but utilize total reflection principle, and the design of utilization itself achieves the goal.Meanwhile, the engineer's scale of Figure 10, Figure 11 and Figure 12 is identical.
The embodiment of the present invention provides a kind of optical module, light beam is divided into the first divided beams A and the second divided beams B by a point light reflection surface in this optical module, because the first divided beams A and the second divided beams B are a part of light beam D, therefore, the cross-sectional area of the first divided beams A and the second divided beams B is less than the cross-sectional area of light beam D, and then the facula area being formed by the first divided beams A and the second divided beams B is less than the light beam D facula area that light splitting does not obtain, simultaneously, the first divided beams A point of light reflection surface total reflection obtains, the second divided beams B does not obtain through point light reflection surface, therefore, the energy of the first divided beams A and the second divided beams B is less than the not energy of light splitting light beam of light beam D, and the facula area of the first divided beams A and the second divided beams B also reduces accordingly, therefore, the light intensity of the first divided beams A and the second divided beams B per unit and light beam D do not divide the light intensity of light time per unit basic identical, therefore, in the time that the first divided beams A is coupled into detector 8, can improve the monitoring degree of accuracy of detector 8 to light beam, in the time that the second divided beams B is coupled into optical fiber by optical fiber interface 6, can transmit farther distance than the divided beams obtaining in prior art.
It should be noted that, above-described embodiment only describes as example so that a point of light reflection surface to be set in described optical module, certainly, at least two points of light reflection surfaces also can be set in described optical module, described light is divided into at least three divided beams, number and the position of point light reflection surface can be set according to the actual requirements, to obtain required divided beams, wherein, the characteristic of each point of light reflection surface is all identical, be all that the light that incides point light reflection surface is reflected to form a road divided beams, do not incide the light of point light reflection surface to form at least one road divided beams, certainly, multiple optical fiber interfaces and multiple detector also can be set in optical module, in the time that light is divided into multiple divided beams by a point light reflection surface, each divided beams can be corresponding with optical fiber interface or detector, divided beams also can be in other function element, and the embodiment of the present invention describes as an example of optical fiber interface and detector example.
Example is that while comprising two points of light reflection surfaces in optical module, point light reflection surface is divided into main beam the principle schematic of three divided beams as shown in figure 13.Wherein, a part of light of main beam T incides point light reflection surface 130, reflected to form divided beams T1 by described point of light emitting surface 130, in main beam T, another part light does not incide described point light reflection surface 130, continues transmission along the light path that incides point light reflection surface 130; The a part of light not inciding in the light of point light reflection surface 130 incides point light reflection surface 131, reflected to form divided beams T2 by a point light reflection surface 131, another part light not inciding in the light of point light reflection surface 130 does not incide point light reflection surface 131, has formed divided beams T3; Because divided beams T1, divided beams T2 and divided beams T3 are, a part of light of main beam T obtains, and therefore, the facula area of the facula area sum main beam T that divided beams T1, divided beams T2 form with divided beams T3 is identical.Now, optical module can comprise a detector and two optical fiber interfaces, and detector can receive divided beams T1 to carry out photoelectric monitor, and two optical fiber interfaces receive respectively divided beams T2 and divided beams T3 to carry out light transmition.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. an optical module, comprising: luminescent device, and described luminescent device is used for emitting beam, and to form main beam, it is characterized in that, and described optical module also comprises: point light reflection surface, optical fiber interface and detector; A part of light in described main beam incides described point light reflection surface, is reflected to form a road divided beams by described point of light reflection surface, and in described main beam, another part light does not incide described point light reflection surface to form at least one road divided beams;
The facula area sum of described divided beams equates with the facula area of described main beam;
Described optical fiber interface is used for receiving all divided beams Zhong mono-road divided beams to carry out light transmition, and described detector is used for receiving all the other divided beams Zhong mono-road divided beams to carry out photoelectric monitor.
2. optical module according to claim 1, is characterized in that, a part of light in described main beam incides described point light reflection surface, described point of light reflection surface generation total reflection.
3. optical module according to claim 1, is characterized in that, described point of light reflection surface extend into the degree of depth difference in described main beam transmission light path, described main beam is divided into the divided beams of different proportion.
4. according to the optical module described in claim 1-3 any one, it is characterized in that, described point of light reflection surface is plane or cambered surface.
5. according to the optical module described in claim 1-3 any one, it is characterized in that, described point of light reflection surface is annular, and the outer diameter of a circle of described annulus is more than or equal to the diameter of described main beam xsect, and the interior diameter of a circle of described annulus is less than the diameter of described main beam xsect.
6. according to the optical module described in claim 1-3 any one, it is characterized in that, described optical module also comprises: turn to reflecting surface;
The described reflecting surface that turns to is for changing the transmission direction of described main beam; Described point of light reflection surface stretches in the light path after described main beam transmission direction changes.
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| CN109581677A (en) * | 2018-12-10 | 2019-04-05 | 昂纳信息技术（深圳）有限公司 | A kind of the optical path monitoring device and system of the light splitting of angle of wedge piece |
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Application publication date: 20140723 |