Optical path structure and optical devices

Abstract

The present invention discloses an optical path structure and an optical device, wherein the optical path structure comprises a first optical signal component, a first optical path component and a second optical path component; the first optical signal component is used to emit and receive parallel light of multiple wavelengths; the first optical path component comprises a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on the light output path of the first optical signal component, and the first optical receiving device is used to receive light of a first wavelength reflected by the first filter; the second optical path component comprises a second optical filter and a second optical receiving device, the second optical filter is obliquely arranged on the light output path of the first optical signal component and is located on the side of the second optical filter facing away from the first optical signal component; the second optical receiving device is used to receive light of a second wavelength that passes through the first optical filter and is reflected by the second optical filter. The optical path structure proposed by the present invention can reduce the number of optical devices in the wavelength division optical path of the optical device, which is beneficial to reducing the volume of the optical device.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic communication technology, and in particular to an optical path structure and an optical device. Background Art

[0002] With the development of optical communication technology, clients have higher and higher demands for broadband access networks. The broadband passive optical integrated access standard GPON network can no longer meet market demand well. Therefore, GPON networks with other transmission rates are often introduced, such as 10G GPON network.

[0003] At present, when various specifications of GPON are deployed through optical devices, in order to achieve independent transmission and reception of GPON optical signals of different specifications, it is often necessary to set up an independent propagation optical path for each specification of GPON optical signal. This requires that the optical device needs to set up multiple optical path components according to the architecture of each propagation optical path, resulting in an increase in the volume of the optical device, which is not conducive to the lightweight and miniaturization of the optical device. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical path structure and an optical device, aiming to reduce the number of optical path elements of the wavelength division optical path structure and the volume of the optical device.

[0005] To achieve the above object, the present invention proposes an optical path structure, which is applied to an optical device. The optical path structure includes:

[0006] a first optical signal component, the first optical signal component being used to emit and receive parallel light of multiple wavelengths;

[0007] A first optical path component, the first optical path component comprises a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on the light output path of the first optical signal component, and the first optical receiving device is used to receive the light of the first wavelength reflected by the first filter;

[0008] A second optical path component, the second optical path component includes a second filter and a second light receiving device, the second filter is obliquely arranged on the light output path of the first optical signal component and is located on the side of the second filter facing away from the first optical signal component; the second light receiving device is used to receive light of a second wavelength that passes through the first filter and is reflected by the second filter.

[0009] In one embodiment of the present invention, the optical path structure further includes a total reflection lens;

[0010] The total reflection lens and the first light receiving device are arranged between the first filter and the first optical signal component, and are respectively located on both sides of the light output path of the first optical signal component; the total reflection lens is used to reflect the first wavelength of light reflected by the first filter to the first light receiving device.

[0011] In one embodiment of the present invention, the angle between the plane where the first filter is located and the light output path of the first optical signal component is defined as α, and the angle between the plane where the total reflection lens is located and the light output path of the first optical signal component is defined as β, 70°≤α<90°, 25°≤β<90°;

[0012] And / or, the angle between the plane where the second optical filter is located and the light output path of the first optical signal component is defined as γ, where γ=45°.

[0013] In one embodiment of the present invention, the first filter and the second filter are high-pass filters;

[0014] And / or, the first wavelength is smaller than the second wavelength.

[0015] In one embodiment of the present invention, the first optical path component further includes a third filter, which is disposed adjacent to the first light receiving device and located on the optical path between the total reflection lens and the first light receiving device, and is used to pass light of the first wavelength.

[0016] In one embodiment of the present invention, the second optical path component further includes a fourth filter, which is disposed adjacent to the second optical receiving device and located on the optical path between the second optical receiving device and the second filter, and is used to pass light of the second wavelength.

[0017] In one embodiment of the present invention, the first optical signal component includes a fiber optic adapter and a first lens;

[0018] The optical fiber adapter is coaxially arranged with the first lens. The first lens is located between the optical fiber adapter and the first optical filter. The first lens is used to make the light emitted by the optical fiber adapter enter the first optical filter in parallel.

[0019] In one embodiment of the present invention, the optical path structure further includes a second optical signal component, and the second optical signal component includes a first light emitting device, a fifth filter, and a second lens;

[0020] The second lens, the fifth filter and the first light emitting device are sequentially arranged at intervals on the extended light path of the light output path of the first optical signal component;

[0021] The light of the third wavelength emitted by the first light emitting device passes through the fifth filter, the second lens, the second filter and the first filter in sequence and then enters the first optical signal component.

[0022] In one embodiment of the present invention, the second optical signal component further comprises a second optical emitting device;

[0023] The second light emitting device is arranged adjacent to the fifth filter and is located on one side of the light output path of the first light emitting device. The light of the fourth wavelength emitted by the second light emitting device is reflected by the fifth filter, and then passes through the second lens, the second filter and the first filter in sequence, and enters the first optical signal component.

[0024] The third wavelength is greater than the fourth wavelength, and the fourth wavelength is greater than the second wavelength.

[0025] In addition, the present invention also provides an optical device, comprising:

[0026] The above-mentioned optical path structure;

[0027] The tube shell is provided with a mounting cavity, and the optical path structure is arranged in the tube shell and is partially located in the mounting cavity.

[0028] The optical path structure of the technical solution of the present invention is provided with a first optical signal component, a first optical path component and a second optical path component, wherein the first optical signal component is used to emit and receive parallel light of multiple wavelengths; the first optical path component includes a first filter and a first optical connection device, the first filter is tiltedly arranged on the light output path of the first optical signal component, and the first light receiving device is used to receive the light of the first wavelength reflected by the first filter; the second optical path component includes a second filter and a second light receiving device, the second filter is tiltedly arranged on the light output path of the first optical signal component, and is located on the side of the second filter facing away from the first optical signal component; the second light receiving device is used to receive the light of the second wavelength that passes through the first filter and is reflected by the second filter. In this way, the first filter can filter the light of the first wavelength emitted by the first optical signal component and reflect it to the first light receiving device, and make the light of the second wavelength emitted by the first optical signal component transmit to the second filter; the second filter then reflects the light of the second wavelength to the second light receiving device for reception. In the optical path structure, the light of the first wavelength and the light of the second wavelength emitted by the first optical signal component are separated on the first filter and then enter different optical receiving devices respectively, thereby realizing wavelength division processing of composite light of two different wavelengths. There is no need to set up multiple independent optical path structures to realize wavelength division of composite light, which reduces the number of corresponding optical path components and is conducive to reducing the volume of the optical path structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 It is a partial structural schematic diagram of the optical device of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the optical path structure of the present invention;

[0032] Figure 3 for Figure 2 Schematic diagram of part of the structure of the optical path.

[0033] Description of Figure Numbers:

[0034] Label name Label name 1 First optical signal component 32 The second light receiving device 11 Fiber Optic Adapter 33 Fourth filter 12 First lens 4 Second optical signal component 2 First optical path component 41 The first light emitting device 21 First filter 42 Fifth filter 22 Total reflection lens 43 Second lens 23 The first light receiving device 44 The second light emitting device 24 The third filter 5 Shell 3 Second optical path component 51 Mounting cavity 31 Second filter

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The meaning of "and / or" appearing in the full text is that it includes three parallel schemes. Taking "A and / or B as an example", it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The invention provides an optical path structure applied to an optical device.

[0041] In the embodiment of the present invention, Figure 1 As shown, the optical path structure includes a first optical signal component 1, a first optical path component 2 and a second optical path component 3; the first optical signal component 1 is used to emit and receive parallel light of multiple wavelengths; the first optical path component 2 includes a first filter 21 and a first optical connecting device, the first filter 21 is tiltedly arranged on the light output path of the first optical signal component 1, and the first light receiving device 23 is used to receive the light of the first wavelength reflected by the first filter; the second optical path component 3 includes a second filter 31 and a second light receiving device 32, the second filter 31 is tiltedly arranged on the light output path of the first optical signal component 1, and is located on the side of the second filter 31 facing away from the first optical signal component 1; the second light receiving device 32 is used to receive the light of the second wavelength that passes through the first filter 21 and is reflected by the second filter 31.

[0042] In this embodiment, the first optical signal component 1 is used to emit a parallel light beam. The parallel light beam may be an optical signal that is propagated through an optical fiber and is focused and collimated. The parallel light beam may contain optical signals of multiple different wavelengths.

[0043] The first optical path component 2 is used to separate the light of the first wavelength from the multi-wavelength light emitted by the first optical signal component 1. Specifically, the first optical path component 2 includes a first filter 21 and a first optical receiving device 23. The first filter 21 is used to reflect the light of the first wavelength and pass the light of the second wavelength. The first filter 21 can be a high-pass filter, which can allow light higher than a certain wavelength to pass and cut off light lower than the certain wavelength. For example, the first filter 21 can allow light with a wavelength greater than 1270nm to pass through, and cut off and reflect light with a wavelength lower than 1270nm. The first optical receiving device 23 can be an optical receiver, and the first optical receiving device 23 is used to receive the first wavelength optical signal.

[0044] The second optical path component 3 is used to cooperate with the first optical path component 2 to separate the light of the second wavelength from the multi-wavelength light emitted by the first optical signal component 1. Specifically, the second optical path component 3 includes a second filter 31 and a second optical receiving device 32. The second filter 31 can be a high-pass filter. The second filter 31 can allow light with a wavelength higher than a certain wavelength to pass through and cut off light with a wavelength lower than the specific wavelength. For example, the second filter 31 can allow light with a wavelength greater than 1310nm to pass through, while cutting off and reflecting light with a wavelength lower than 1310nm. The second optical receiving device 32 is an optical receiver. The second optical receiving device 32 is used to receive an optical signal of the second wavelength, so as to cooperate with the first optical receiving device 23 to separate and process the light of the first wavelength and the second wavelength and use them.

[0045] The first filter 21 in this embodiment can filter the light of the first wavelength emitted by the first optical signal component 1 and reflect it to the first optical receiving device 23, and transmit the light of the second wavelength emitted by the first optical signal component 1 to the second filter 31; the second filter 31 then reflects the light of the second wavelength to the second optical receiving device 32 for reception. In this optical path structure, the light of the first wavelength and the light of the second wavelength emitted by the first optical signal component 1 are separated on the first filter 21, and then enter different optical receiving devices respectively, so as to realize the wavelength division processing of the composite light of two different wavelengths, without setting up multiple independent optical path structures to realize the wavelength division of the composite light, thus reducing the number of corresponding optical path components and facilitating the reduction of the volume of the optical path structure.

[0046] In one embodiment of the present invention, Figure 1 As shown, the optical path structure also includes a total reflection lens 22; the total reflection lens 22 and the first light receiving device 23 are arranged between the first filter 21 and the first optical signal component 1, and are respectively located on both sides of the light output path of the first optical signal component 1; the total reflection lens 22 is used to reflect the first wavelength of light reflected by the first filter 21 to the first light receiving device 23.

[0047] In this embodiment, the total reflection lens 22 is used to reflect the light beam reflected from the first filter 21, and fully reflect the light beam to the first light receiving device 23 for reception. In this way, the light of the first wavelength filtered and reflected by the first filter 21 can enter the first light receiving device 23 as much as possible for recycling, thereby improving the light utilization rate. At the same time, the setting of the total reflection lens 22 allows the light path between the first filter 21 and the first light receiving device 23 to be folded and compressed, shortening the light path from the first filter 21 to the first light receiving device 23, which is conducive to reducing the volume of the optical path structure and the volume of the optical device.

[0048] In one embodiment of the present invention, Figure 1As shown, the angle between the plane where the first optical filter 21 is located and the light output path of the first optical signal component 1 is defined as α, the angle between the plane where the total reflection lens 22 is located and the light output path of the first optical signal component 1 is defined as β, 70°≤α<90°, 25°≤β<90°; and / or, the angle between the plane where the second optical filter 31 is located and the light output path of the first optical signal component 1 is defined as γ, γ=45°.

[0049] In this embodiment, when the angle α between the plane where the first filter 21 is located and the light output path of the first optical signal component 1 is greater than or equal to 70 degrees and less than or equal to 90 degrees, the angle between the plane where the first filter 21 is located and the vertical direction is smaller. At this time, the inclination of the first filter 21 relative to the vertical direction is lower, and the light transition band when the first filter 21 is coated is smaller, and the coating process requirements for the first filter 21 are lower, making the coating of the first filter 21 easier, and the first filter 21 has a better separation degree for the first wavelength and the second wavelength of light, which is beneficial to improving the separation effect of the first filter 21 on the first wavelength and the second wavelength of light.

[0050] When the angle β between the plane where the total reflection lens 22 is located and the light-outgoing optical path of the first optical signal component 1 is greater than or equal to 25 degrees and less than or equal to 90 degrees, the total reflection lens 22 can cooperate with the first optical filter 21 to reflect the light of the first wavelength to the first optical receiving device 23 for reception. Preferably, the sum of the angles α and β is 95 degrees. At this time, the first optical filter 21 can reflect the light of the first wavelength in a direction perpendicular to the light-outgoing optical path of the first optical signal component 1, and can realize that the light of the first wavelength is vertically incident on the first optical receiving device 23, so that the light of the first wavelength can be transmitted at a high rate in the first optical receiving device 23.

[0051] When the angle γ between the plane where the second filter 31 is located and the light output path of the first optical signal component 1 is equal to 45 degrees, the second filter 31 can reflect the light of the second wavelength in a direction perpendicular to the light output path of the first optical signal component 1. At this time, the light of the second wavelength can be vertically incident on the second optical receiving device 32, so that the light of the second wavelength can be transmitted at a high rate in the second optical receiving device 32.

[0052] In one embodiment of the present invention, the first filter 21 and the second filter 31 are high-pass filters; and / or the first wavelength is smaller than the second wavelength.

[0053] In this embodiment, when the first optical filter 21 and the second optical filter 31 are high-pass filters, and the cut-off wavelengths of the first optical filter 21 and the second optical filter 31 are different, the cut-off wavelength of the first optical filter 21 is the first wavelength, and the cut-off wavelength of the second optical filter 31 is the second wavelength. The wavelength of the light of the first wavelength filtered by the first optical filter 21 is smaller than the wavelength of the light of the second wavelength filtered by the second optical filter 31, so that the light of the first wavelength in the first optical signal component 1 is cut off and reflected when passing through the first optical filter 21, while the light of the second wavelength in the first optical signal component 1 can pass through the first optical filter 21 to be incident on the second optical filter 31, and is cut off and reflected when passing through the second optical filter 31.

[0054] Optionally, the first wavelength may be greater than or equal to 1260 nm and less than or equal to 1280 nm, the second wavelength may be greater than or equal to 1300 nm and less than or equal to 1320 nm, the cutoff wavelength of the first filter 21 may be 1280 nm, and the cutoff wavelength of the second filter 31 may be 1320 nm.

[0055] In one embodiment of the present invention, Figure 1 As shown, the second optical path component 3 further includes a fourth filter 33, which is disposed adjacent to the second light receiving device 32 and located on the optical path between the total reflection lens 22 and the first light receiving device 23, and is used to pass light of the second wavelength.

[0056] In this embodiment, the third filter 24 is a bandpass filter, and the third filter 24 is used to allow light of the first wavelength to pass through, and to cut off light other than the first wavelength, because the first filter 21 reflects light less than or equal to the first wavelength, and the light reflected by the first filter 21 to the total reflection lens 22 is mixed with the light of the first wavelength and the light with a wavelength smaller than the first wavelength, and the light reflected by the total reflection lens 22 to the first light receiving device 23 also contains the light of the first wavelength and the light with a wavelength smaller than the first wavelength, which will cause the light received by the first receiving component to be a composite light of multiple wavelengths, and the optical signal is not pure enough, which affects the use of the optical signal of the first wavelength. Therefore, the setting of the third filter 24 can further filter the light reflected by the total reflection mirror to the first light receiving device 23, and only allow the light of the first wavelength to enter the first light receiving device 23, so as to achieve a purer separation of the light of the first wavelength, which is conducive to the subsequent use of the light of the first wavelength.

[0057] In one embodiment of the present invention, Figure 1 As shown, the first optical path component 2 further includes a third filter 24, which is disposed adjacent to the first light receiving device 23 and located between the first light receiving device 23 and the total reflection lens 22, and is used for passing light of the first wavelength.

[0058] In this embodiment, the third filter 24 is a bandpass filter, and the third filter 24 is used to allow light of the first wavelength to pass through, and to cut off light other than the first wavelength, because the first filter 21 reflects light less than or equal to the first wavelength, and the light reflected by the first filter 21 to the total reflection lens 22 is mixed with the light of the first wavelength and the light with a wavelength smaller than the first wavelength, and the light reflected by the total reflection lens 22 to the first light receiving device 23 also contains the light of the first wavelength and the light with a wavelength smaller than the first wavelength, which will cause the light received by the first receiving component to be a composite light of multiple wavelengths, and the optical signal is not pure enough, which affects the use of the optical signal of the first wavelength. Therefore, the setting of the third filter 24 can further filter the light reflected by the total reflection mirror to the first light receiving device 23, and only allow the light of the first wavelength to enter the first light receiving device 23, so as to achieve a purer separation of the light of the first wavelength, which is conducive to the subsequent use of the light of the first wavelength.

[0059] In one embodiment of the present invention, Figure 1 As shown, the first optical signal component 1 includes a fiber optic adapter 11 and a first lens 12; the fiber optic adapter 11 and the first lens 12 are coaxially arranged, and the first lens 12 is located on the optical path between the fiber optic adapter 11 and the first filter 21, and the first lens 12 is used to make the light emitted by the fiber optic adapter 11 enter the first filter 21 in parallel.

[0060] In this embodiment, the optical fiber adapter 11 is connected to the optical fiber, and is used to receive the optical signal and transmit the optical signal to the optical fiber and emit the optical signal in the optical fiber to the first optical filter 21. The first lens 12 is used to converge and collimate the light beam emitted by the optical fiber adapter 11, so that the light beam becomes collimated parallel light and enters the first optical filter 21, so that the light reflected by the first optical filter 21 or passing through the first optical filter 21 is also parallel light, so that the optical path is easy to control and not easy to diverge and deflect, which is also conducive to improving the utilization rate of light.

[0061] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the optical path structure also includes a second optical signal component 4, which includes a first light emitting device 41, a fifth filter 42 and a second lens 43; the second lens 43, the fifth filter 42 and the first light emitting device 41 are sequentially arranged at intervals on the extended optical path of the light output path of the first optical signal component 1; the light of the third wavelength emitted by the first light emitting device 41 passes through the fifth filter 42, the second lens 43, the second filter 31 and the first filter 21 in sequence and then enters the first optical signal component 1.

[0062] In this embodiment, the second optical signal component 4 is used to transmit an optical signal to the first optical signal component 1. The first optical emitting device 41 in the second optical signal component 4 can be an optical transmitter, and the first optical emitting device 41 is used to emit an optical signal; the fifth optical filter 42 in the second optical signal component 4 can be a high-pass filter, which allows light with a wavelength higher than a certain specific wavelength to pass through and cuts off light with a wavelength lower than the specific wavelength. For example, the fifth optical filter 42 allows light with a wavelength greater than 1490nm to pass through, and cuts off and reflects light with a wavelength less than or equal to 1490nm. The second lens 43 is used to converge and collimate the light beam, and the second lens 43 can be set at 45 degrees to the vertical direction. The cut-off wavelength of the fifth optical filter 42 is greater than the cut-off wavelength of the second lens 43, the cut-off wavelength of the second lens 43 is greater than the cut-off wavelength of the second lens 43, and the third wavelength is greater than the second wavelength, so that the third wavelength of light emitted by the first optical emitting device 41 can pass through the fifth optical filter 42, the second optical filter 31 and the first optical filter 21 in sequence and enter the optical fiber adapter 11 for reception.

[0063] In one embodiment of the present invention, Figure 2 and Figure 3 As shown, the second optical signal component 4 also includes a second light emitting device 44; the second light emitting device 44 is arranged adjacent to the fifth filter 42 and is located on one side of the light output path of the first light emitting device 41. The light of the fourth wavelength emitted by the second light emitting device 44 is reflected by the fifth filter 42, and then passes through the second lens 43, the second filter 31 and the first filter 21 in sequence, and enters the first optical signal component 1; the third wavelength is greater than the fourth wavelength, and the fourth wavelength is greater than the second wavelength.

[0064] In this embodiment, the second lens 43 may be arranged at 45 degrees to the vertical direction, the second light emitting device 44 may be arranged above the second lens 43, the second light emitting device 44 may be a light emitter, and the second light emitting device 44 is used to emit an optical signal to the optical fiber adapter 11. The cutoff wavelength of the fifth optical filter 42 is the third wavelength, and the third wavelength is greater than the fourth wavelength, the fourth wavelength is greater than the second wavelength, and the second wavelength is greater than the first wavelength, so that the light of the fourth wavelength emitted by the second light emitting device 44 is reflected by the fifth optical filter 42, and passes through the second optical filter 31 and the first optical filter 21 to enter the optical fiber adapter; and the light of the third wavelength emitted by the first light emitting device 41 can pass through the fifth optical filter 42, and then pass through the second optical filter 31 and the first optical filter 21 to enter the optical fiber adapter 11, and be combined with the light of the third wavelength to achieve the composite utilization of dual-wavelength light. Among them, the first wavelength may be greater than or equal to 1260nm and less than or equal to 1280nm, the second wavelength may be greater than or equal to 1300nm and less than or equal to 1320nm, the fourth wavelength may be greater than or equal to 1480nm and less than or equal to 1500nm, and the third wavelength may be greater than or equal to 1574nm and less than or equal to 1580nm.

[0065] It is worth pointing out that the optical fiber adapter 11 can send and receive optical signals at the same time, that is, while the optical fiber adapter 11 sends the optical signal to the first lens 12 and then to the first filter 21, the first light emitting device 41 and the second light emitting device 44 can also send optical signals to the fifth filter 42. Because the third wavelength is greater than the fourth wavelength, the fourth wavelength is greater than the second wavelength, and the second wavelength is greater than the first wavelength, the light of the third wavelength emitted by the first light emitting device 41 and the light of the fourth wavelength emitted by the second light emitting device 44 will directly pass through the second filter 31 and the first filter 21 into the optical fiber adapter 11, and the light of the first wavelength emitted by the optical fiber adapter 11 will be cut off and reflected at the first filter, and the light of the second wavelength will be cut off and reflected at the second filter 31 and will not continue to propagate forward. Therefore, the propagation of the light of the first wavelength to the fourth wavelength in the present optical path structure does not interfere with each other, thereby realizing the wavelength division multiplexing function of the present optical path structure.

[0066] The present invention further provides an optical device, which includes the optical path structure in the above embodiment and a tube shell 5 . The tube shell 5 is provided with a mounting cavity 51 . The optical path structure is arranged in the tube shell 5 and is partially located in the mounting cavity 51 .

[0067] In this embodiment, the first light receiving device 23, the second light receiving device 32, the first light emitting device 41 and the second light emitting device 44 can be arranged in the housing, and partly located in the mounting cavity 51. The first optical filter 21, the total reflection lens 22, the second optical filter 31, the third optical filter 24, the fourth optical filter 33, the fifth optical filter 42 and the second lens 43 are arranged in the mounting cavity 51, and can be fixedly connected to the tube shell 5 by means of clamping, bonding, etc. The tube shell 5 is used to install and fix the above-mentioned optical path structure, so that the relative positions between the optical devices in the optical path structure are stable, and the light is accurately and reliably transmitted in the optical path structure.

[0068] The specific structure of the optical path structure refers to the above embodiments. Since the optical device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0069] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An optical path structure, applied to an optical device, characterized in that: The optical path structure comprises: a first optical signal component, the first optical signal component being used to emit and receive parallel light of multiple wavelengths; A first optical path component, the first optical path component comprises a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on the light output path of the first optical signal component, and the first optical receiving device is used to receive the light of the first wavelength reflected by the first filter; a second optical path component, the second optical path component comprising a second optical filter and a second light receiving device, the second optical filter being obliquely arranged on the light outgoing optical path of the first optical signal component and being located on a side of the second optical filter facing away from the first optical signal component; the second light receiving device being used to receive light of a second wavelength that passes through the first optical filter and is reflected by the second optical filter; The first filter and the second filter are high-pass filters; And / or, the first wavelength is smaller than the second wavelength; The optical path structure further includes a second optical signal component, which includes a first light emitting device, a fifth filter, and a second lens; The second lens, the fifth filter and the first light emitting device are sequentially arranged at intervals on the extended light path of the light output path of the first optical signal component; The light of the third wavelength emitted by the first light emitting device sequentially passes through the fifth filter, the second lens, the second filter and the first filter and then enters the first optical signal component; The second optical signal assembly further includes a second optical emitting device; The second light emitting device is arranged adjacent to the fifth filter and is located on one side of the light output path of the first light emitting device. The light of the fourth wavelength emitted by the second light emitting device is reflected by the fifth filter, and then passes through the second lens, the second filter and the first filter in sequence, and enters the first optical signal component. The third wavelength is greater than the fourth wavelength, and the fourth wavelength is greater than the second wavelength.

2. The optical path structure according to claim 1, characterized in that: The optical path structure also includes a total reflection lens; The total reflection lens and the first light receiving device are arranged between the first filter and the first optical signal component, and are respectively located on both sides of the light output path of the first optical signal component; the total reflection lens is used to reflect the first wavelength of light reflected by the first filter to the first light receiving device.

3. The optical path structure according to claim 2, characterized in that: The angle between the plane where the first filter is located and the light output path of the first optical signal component is defined as α, and the angle between the plane where the total reflection lens is located and the light output path of the first optical signal component is defined as β, 70°≤α<90°, 25°≤β<90°; And / or, the angle between the plane where the second optical filter is located and the light output path of the first optical signal component is defined as γ, where γ=45°.

4. The optical path structure according to claim 2, characterized in that: The first optical path component also includes a third filter, which is arranged adjacent to the first light receiving device and located on the optical path between the total reflection lens and the first light receiving device. The third filter is used to pass the light of the first wavelength.

5. The optical path structure according to claim 1, characterized in that: The second optical path component also includes a fourth filter, which is disposed adjacent to the second light receiving device and located on the optical path between the second light receiving device and the second filter, and is used for passing the light of the second wavelength.

6. The optical path structure according to claim 1, characterized in that: The first optical signal assembly includes a fiber optic adapter and a first lens; The optical fiber adapter is coaxially arranged with the first lens. The first lens is located between the optical fiber adapter and the first optical filter. The first lens is used to make the light emitted by the optical fiber adapter enter the first optical filter in parallel.

7. An optical device, characterized in that: include: The optical path structure according to any one of claims 1 to 6; The tube shell is provided with a mounting cavity, and the optical path structure is arranged in the tube shell and is partially located in the mounting cavity.

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