CN111624714A - Optical path structure and optical device - Google Patents

Abstract

The invention discloses a light path structure and an optical device, wherein the light path structure comprises a first optical signal component, a first light path component and a second light path component; the first optical signal component is used for emitting and receiving parallel light with various 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 outgoing path of the first optical signal component, and the first optical receiving device is used for receiving light with a first wavelength reflected by the first optical filter; the second optical path component comprises a second optical filter and a second light receiving device, the second optical filter is obliquely arranged on the light emergent path of the first optical signal component and is positioned on one side of the second optical filter, which faces away from the first optical signal component; the second light receiving device is used for receiving the light with the second wavelength, which is transmitted through the first optical filter and reflected by the second optical filter. The optical path structure provided by the invention can reduce the number of optical devices of wavelength division optical paths in the optical devices, and is beneficial to reducing the volume of the optical devices.

Description

Optical path structure and optical device

technical field

The invention relates to the technical field of optoelectronic communication, in particular to an optical circuit structure and an optical device.

Background technique

With the development of optical communication technology, the client's demand for broadband on the access network is getting higher and higher, and the broadband passive optical integrated access standard GPON network can no longer meet the market demand, so GPON networks with other transmission rates are often introduced. , such as 10G GPON network.

At present, when GPONs of various specifications are deployed through optical devices, in order to realize the independent transmission and reception of GPON optical signals of different specifications, it is often necessary to set an independent propagation optical path for each specification of GPON optical signals, which makes the optical devices need to be based on each specification. The structure of a propagation optical path is provided with multiple optical path components, which leads to 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

The main purpose of the present invention is to provide an optical path structure and an optical device, aiming at reducing the number of optical path elements and the volume of the optical device in the wavelength division optical path structure.

In order to achieve the above object, the present invention proposes an optical path structure, which is applied to an optical device, and the optical path structure includes:

a first optical signal component, the first optical signal component is used for emitting and receiving parallel light of multiple wavelengths;

A first optical path assembly, the first optical path assembly includes a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on the light exit optical path of the first optical signal assembly, the first optical filter The light receiving device is used for receiving the light of the first wavelength reflected by the first filter;

A second optical path assembly, the second optical path assembly includes a second optical filter and a second light receiving device, the second optical filter is obliquely arranged on the light exit optical path of the first optical signal assembly, and is located in the The side of the second optical filter facing away from the first optical signal component; the second optical receiving device is used for receiving the second optical filter which has passed through the first optical filter and is reflected by the second optical filter. wavelength of light.

In an embodiment of the present invention, the optical path structure further includes a total reflection mirror;

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 exit light path of the first optical signal component; The total reflection lens is used for reflecting the light of the first wavelength reflected by the first filter to the first light receiving device.

In an embodiment of the present invention, the angle between the plane where the first optical filter is located and the light exit path of the first optical signal component is defined as α, and the plane where the total reflection mirror is located is defined as α. The angle between the light exit light paths of the first optical signal component is β, 70°≤α<90°, and 25°≤β<90°;

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

In an embodiment of the present invention, the first filter and the second filter are high-pass filters;

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

In an embodiment of the present invention, the first optical path component further includes a third optical filter, the third optical filter is disposed adjacent to the first light receiving device, and is located between the total reflection lens and the On the optical path between the first light receiving devices, the third filter is used to pass the light of the first wavelength.

In an embodiment of the present invention, the second optical path assembly further includes a fourth optical filter, and the fourth optical filter is disposed adjacent to the second light receiving device and located between the second light receiving device and the second light receiving device. On the optical path between the second filters, the fourth filter is used to pass the light of the second wavelength.

In an embodiment of the present invention, the first optical signal component includes an optical fiber 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 filter, and the first lens is used to make the light emitted by the optical fiber adapter parallel injection into the first filter.

In an 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;

The second lens, the fifth filter, and the first light emitting device are sequentially and spaced apart on the extended light path of the light exit light path of the first light 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 a first optical signal component.

In an embodiment of the present invention, the second optical signal component further includes a second light emitting device;

The second light emitting device is disposed adjacent to the fifth filter, and is located on one side of the light exit light path of the first light emitting device, and the light of the fourth wavelength emitted by the second light emitting device passes through the After the fifth filter is reflected, it sequentially passes through the second lens, the second filter and the first filter, 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.

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

The above-mentioned optical path structure;

A tube case is provided with an installation cavity, and the optical path structure is arranged in the tube case and partially located in the installation cavity.

The optical path structure of the technical solution of the present invention is provided with a first optical signal assembly, a first optical path assembly and a second optical path assembly, wherein the first optical signal assembly is used to emit and receive parallel light of multiple wavelengths; the first optical path assembly includes a first optical path assembly. A filter and a first optical connection device, the first filter is arranged obliquely on the light exit light 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 optical path assembly includes a second optical filter and a second light receiving device. The second optical filter is obliquely arranged on the light-emitting optical path of the first optical signal assembly, and is located on the side of the second optical filter facing away from the first optical signal assembly. ; The second light receiving device is used for receiving the light of the second wavelength which is transmitted through the first filter and reflected by the second filter. In this way, the first filter can filter and reflect the light of the first wavelength emitted by the first optical signal component to the first light receiving device, and transmit the light of the second wavelength emitted by the first optical signal component to the second filter The second optical filter reflects the light of the second wavelength into the second light receiving device for receiving. 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 are separated on the first filter, and then enter into different light receiving devices respectively to realize the composite light of two different wavelengths. It does not need to set up multiple independent optical path structures to realize the wavelength division of composite light, reduces the number of corresponding optical path components, and is beneficial to reduce the volume of the optical path structure.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

Fig. 1 is the partial structural schematic diagram of the optical device of the present invention;

Fig. 2 is the structural representation of the optical path structure of the present invention;

FIG. 3 is a partial structural schematic diagram of the optical path structure in FIG. 2 .

Description of reference numbers:

label name label name 1 first optical signal assembly 32 second light receiving device 11 Fiber Adapter 33 Fourth filter 12 first lens 4 second optical signal assembly 2 first optical path assembly 41 first light emitting device twenty one first filter 42 Fifth filter twenty two total reflection lens 43 second lens twenty three first light receiving device 44 second light emitting device twenty four third filter 5 shell 3 second optical path assembly 51 mounting cavity 31 second filter

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In the present invention, unless otherwise expressly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal communication between two elements or an interaction relationship between the two elements, unless otherwise explicitly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. The meaning of "and/ke" in the whole text is to include three side-by-side schemes. Taking "A and/or B as an example", it includes scheme A, scheme B, or scheme that A and B satisfy at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The invention provides an optical path structure, which is applied to an optical device.

In this embodiment of the present invention, as shown in FIG. 1 , 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 multiple wavelengths The first optical path assembly 2 includes a first optical filter 21 and a first optical connection device, the first optical filter 21 is obliquely arranged on the light exit optical path of the first optical signal assembly 1, and the first optical receiving device 23 uses for receiving the light of the first wavelength reflected by the first filter; the second optical path assembly 3 includes a second filter 31 and a second light receiving device 32, and the second filter 31 is obliquely arranged on the first optical signal assembly 1. The second optical filter 31 is located on the side of the second optical filter 31 facing away from the first optical signal component 1 on the light-emitting optical path; of the second wavelength of light.

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 propagated through an optical fiber, focused and collimated, and the parallel light beam may contain light signals of various wavelengths.

The first optical path component 2 is used for separating the light of the first wavelength in the multi-wavelength light emitted by the first optical signal component 1 . Specifically, the first optical path assembly 2 includes a first optical filter 21 and a first light receiving device 23. The first optical filter 21 is used to reflect the light of the first wavelength and pass the light of the second wavelength. 21 can be a high-pass filter, which can pass the light higher than a certain wavelength and cut off the light lower than the certain wavelength. Light with wavelengths below 1270 nm is cut off and reflected. The first light receiving device 23 may be an optical receiver, and the first light receiving device 23 is used for receiving the first wavelength optical signal.

The second optical path assembly 3 is used for cooperating with the first optical path assembly 2 to separate the light of the second wavelength in the multi-wavelength light emitted by the first optical signal assembly 1 . Specifically, the second optical path assembly 3 includes a second optical filter 31 and a second light receiving device 32, the second optical filter 31 can be a high-pass filter, and the second optical filter 31 can make a wavelength higher than a certain wavelength The light passes through and cuts off light with a wavelength below the specific wavelength. For example, the second filter 31 allows light with a wavelength greater than 1310 nm to pass through, and cuts off and reflects light with a wavelength below 1310 nm. The second light receiving device 32 is an optical receiver, and the second light receiving device 32 is used to receive the optical signal of the second wavelength, so as to cooperate with the first light receiving device 23 to separate, process and use the light of the first wavelength and the second wavelength .

The first optical filter 21 in this embodiment can filter and reflect the light of the first wavelength emitted by the first optical signal component 1 to the first light receiving device 23, and make the first optical signal component 1 emit the second wavelength The light of the second wavelength is transmitted to the second filter 31 ; the second filter 31 then reflects the light of the second wavelength into the second light receiving device 32 for receiving. 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 into different light receiving devices respectively, so as to realize two different wavelengths of light. The wavelength division processing of the composite light does not need to set up multiple independent optical path structures to realize the wavelength division of the composite light, which reduces the number of corresponding optical path components and is beneficial to reducing the volume of the optical path structure.

In an embodiment of the present invention, as shown in FIG. 1 , the optical path structure further includes a total reflection lens 22 ; the total reflection lens 22 and the first light receiving device 23 are disposed on the first filter 21 and the first optical signal assembly 1 The total reflection lens 22 is used to reflect the light of the first wavelength reflected by the first filter 21 to the first light receiving device 23 .

In this embodiment, the total reflection lens 22 is used to reflect the light beam reflected from the first optical filter 21 , and totally reflect the light beam into the first light receiving device 23 for receiving. In this way, the light of the first wavelength filtered and reflected by the first optical filter 21 can enter into the first light receiving device 23 as much as possible for recovery, thereby improving the light utilization rate. At the same time, the arrangement of the total reflection lens 22 allows the optical path between the first optical filter 21 and the first light receiving device 23 to be folded and compressed, shortening the optical path from the first optical filter 21 to the first light receiving device 23 , which is beneficial to reduce the volume of the optical path structure and the volume of the optical device.

In an embodiment of the present invention, as shown in FIG. 1 , the angle between the plane where the first optical filter 21 is located and the light path of the first optical signal component 1 is defined as α, and the angle between the plane where the total reflection lens 22 is located is defined as α. The included angle between the plane and the light exit path of the first optical signal component 1 is β, 70°≤α<90°, 25°≤β<90°; and/or, define the plane where the second filter 31 is located and The included angle between the light-emitting optical paths of the first optical signal component 1 is γ, and γ=45°.

In this embodiment, when the angle α between the plane where the first optical filter 21 is located and the light exit 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 α where the first optical filter 21 is located The angle between the plane and the vertical direction is small, and the inclination of the first optical filter 21 relative to the vertical direction is low at this time, and the light transition band when the first optical filter 21 is coated is small. The first optical filter 21 has lower requirements on the coating process, which makes the coating of the first optical filter 21 easier, and the first optical filter 21 has better separation of the light of the first wavelength and the second wavelength, which is beneficial to improve the The separation effect of the first filter 21 on the light of the first wavelength and the light of the second wavelength.

When the angle β between the plane where the total reflection lens 22 is located and the light exit path of the first optical signal assembly 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 filter 21 to convert the first The light of the wavelength is reflected into the first light receiving device 23 and received. Preferably, the sum of the included angle α and the included angle 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 exit light path of the first optical signal component 1 . Going out, the light of the first wavelength can be vertically incident into the first light receiving device 23 , so that the light of the first wavelength can propagate at a high speed in the first light receiving device 23 .

When the included angle γ between the plane where the second optical filter 31 is located and the light exit path of the first optical signal component 1 is equal to 45 degrees, the second optical filter 31 can connect the light edge of the second wavelength with the first optical signal component 1. The light exiting light path is reflected in the vertical direction, and at this time, the light of the second wavelength can be vertically incident into the second light receiving device 32 , which facilitates the high-speed propagation of the light of the second wavelength in the second light receiving device 32 .

In an 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.

In this embodiment, when the first filter 21 and the second filter 31 are high-pass filters, and the cutoff wavelengths of the first filter 21 and the second filter 31 are different, the first filter The cutoff wavelength of the filter 21 is the first wavelength, and the cutoff wavelength of the second filter 31 is the second wavelength. The wavelength of the light of the first wavelength filtered by the first filter 21 is smaller than the wavelength of the light of the second wavelength filtered by the second filter 31 , so that the light of the first wavelength in the first optical signal assembly 1 has a smaller wavelength. When passing through the first optical filter 21, it is cut off and reflected, and the light of the second wavelength in the first optical signal component 1 can pass through the first optical filter 21 and enter the second optical filter 31, and pass through the second optical filter 31. Filter 31 is blocked and reflected.

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

In an embodiment of the present invention, as shown in FIG. 1 , the second optical path assembly 3 further includes a fourth optical filter 33 , and the fourth optical filter 33 is disposed adjacent to the second light receiving device 32 and located in the total reflection On the optical path between the lens 22 and the first light receiving device 23, the fourth filter 33 is used to pass the light of the second wavelength.

In this embodiment, the third filter 24 is a band-pass filter, and the third filter 24 is used to pass the light of the first wavelength and cut off the light other than the first wavelength, because the first filter The light sheet 21 reflects light with a first wavelength or less, and the light reflected by the first filter 21 to the total reflection lens 22 is mixed with light of the first wavelength and light with a wavelength smaller than the first wavelength, and the total reflection lens The light reflected from 22 to the first light receiving device 23 also contains light of the first wavelength and light with a wavelength smaller than that of the first wavelength, which will cause the light received by the first receiving component to be multi-wavelength composite light, and the optical signal It is not pure enough to affect the use of the optical signal of the first wavelength. Therefore, the arrangement 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 realize the first A purer separation of wavelength light facilitates subsequent use of light of the first wavelength.

In an embodiment of the present invention, as shown in FIG. 1 , the first optical path assembly 2 further includes a third optical filter 24 , and the third optical filter 24 is disposed adjacent to the first light receiving device 23 and located in the first optical receiving device 23 . Between the device 23 and the total reflection mirror 22, a third filter 24 is used to pass the light of the first wavelength.

In this embodiment, the third filter 24 is a band-pass filter, and the third filter 24 is used to pass the light of the first wavelength and cut off the light other than the first wavelength, because the first filter The light sheet 21 reflects light with a first wavelength or less, and the light reflected by the first filter 21 to the total reflection lens 22 is mixed with light of the first wavelength and light with a wavelength smaller than the first wavelength, and the total reflection lens The light reflected from 22 to the first light receiving device 23 also contains light of the first wavelength and light with a wavelength smaller than that of the first wavelength, which will cause the light received by the first receiving component to be multi-wavelength composite light, and the optical signal It is not pure enough to affect the use of the optical signal of the first wavelength. Therefore, the arrangement 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 realize the first A purer separation of wavelength light facilitates subsequent use of light of the first wavelength.

In an embodiment of the present invention, as shown in FIG. 1 , the first optical signal assembly 1 includes an optical fiber adapter 11 and a first lens 12 ; the optical fiber adapter 11 and the first lens 12 are coaxially arranged, and the first lens 12 is located in the optical fiber adapter On the optical path between 11 and the first optical filter 21 , the first lens 12 is used to make the light emitted by the optical fiber adapter 11 enter the first optical filter 21 in parallel.

In this embodiment, the optical fiber adapter 11 is connected with the optical fiber, and is used for receiving the optical signal, transmitting the optical signal into the optical fiber, and transmitting the optical signal in the optical fiber to the first optical filter 21 . The first lens 12 is used for converging and collimating the light beam emitted by the optical fiber adapter 11, so that the light beam becomes a collimated parallel light and enters the first filter 21, so that it can be reflected by the first filter 21 or The light passing through the first optical filter 21 is also parallel light, so that the light path is easy to control and not easy to diverge and deflect, and it is also beneficial to improve the utilization rate of light.

In an embodiment of the present invention, as shown in FIG. 1 and FIG. 2 , the optical path structure further includes a second optical signal component 4 , and the second optical signal component 4 includes a first light emitting device 41 , a fifth filter 42 and The second lens 43 ; the second lens 43 , the fifth filter 42 and the first light emitting device 41 are sequentially and spaced apart on the extended optical path of the light exit light path of the first optical signal assembly 1 ; The three wavelengths of light enter the first optical signal component 1 after passing through the fifth filter 42 , the second lens 43 , the second filter 31 and the first filter 21 in sequence.

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 light emitting device 41 in the second optical signal component 4 may be an optical transmitter, and the first light emitting device 41 is used to send out an optical signal; the fifth filter 42 in the second optical signal component 4 can be a high-pass filter, which can pass the light higher than a certain wavelength and cut off the light lower than the certain wavelength, For example, the fifth filter 42 can pass light with a wavelength greater than 1490 nm, and cut off and reflect light with a wavelength less than or equal to 1490 nm. The second lens 43 is used for condensing and collimating the light beam, and the second lens 43 can be arranged at 45 degrees to the vertical direction. The cutoff wavelength of the fifth filter 42 is greater than the cutoff wavelength of the second lens 43, the cutoff wavelength of the second lens 43 is greater than the cutoff wavelength of the second lens 43, and the third wavelength is greater than the second wavelength, so that the first light emitting device The light of the third wavelength emitted by 41 can pass through the fifth filter 42 , the second filter 31 and the first filter 21 in sequence to enter the optical fiber adapter 11 for reception.

In an embodiment of the present invention, as shown in FIG. 2 and FIG. 3 , the second optical signal component 4 further includes a second light emitting device 44 ; the second light emitting device 44 is disposed adjacent to the fifth filter 42 and located at On one side of the light exit light 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 and the second filter 31 in turn. and the first optical filter 21, and enter 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.

In this embodiment, the second lens 43 can be disposed at 45 degrees from the vertical direction, the second light emitting device 44 can be disposed above the second lens 43, the second light emitting device 44 can be a light emitter, the second The light emitting device 44 is used for emitting light signals to the fiber optic adapter 11 . The cut-off wavelength of the fifth 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 second wavelength emitted by the second light emitting device 44 is greater than the first wavelength. The four-wavelength light is reflected by the fifth filter 42, and enters the fiber adaptation through the second filter 31 and the first filter 21; and the third wavelength light emitted by the first light emitting device 41 can Through the fifth filter 42, then through the second filter 31 and the first filter 21, it enters the fiber adapter 11, and is combined with the light of the third wavelength to realize the composite utilization of the light of the two wavelengths . The first wavelength can be greater than or equal to 1260nm and less than or equal to 1280nm, the second wavelength can be greater than or equal to 1300nm and less than or equal to 1320nm, the fourth wavelength can be greater than or equal to 1480nm and less than or equal to 1500nm, and the third wavelength can be greater than or equal to 1574nm and less than or equal to 1580nm.

It is worth noting that the optical fiber adapter 11 can transmit and receive optical signals at the same time, that is, while the optical fiber adapter 11 transmits optical signals to the first lens 12 and then to the first optical filter 21, the first light emitting device 41 and the second light emitting device 41 emit light. The device 44 can also send an optical signal to the fifth filter 42, because the third wavelength is greater than the fourth wavelength, the fourth wavelength is greater than the second wavelength, the second wavelength is greater than the first wavelength, and the third wavelength emitted by the first light emitting device 41 is greater than the first wavelength. The light of the wavelength and the light of the fourth wavelength emitted by the second light emitting device 44 will directly enter the fiber adapter 11 through the second filter 31 and the first filter 21, and the first wavelength emitted by the fiber adapter 11 The light is cut off and reflected at the first filter, and the light of the second wavelength is cut off and reflected at the second filter 31, and will not continue to propagate forward. The propagation of light does not interfere with each other, thereby realizing the wavelength division multiplexing function of the optical path structure.

The present invention also provides an optical device, which includes the optical path structure in the above-mentioned embodiment and a package 5 . The package 5 is provided with a mounting cavity 51 , and the optical path structure is provided in the package 5 and partially located in the mounting cavity 51 .

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 may be disposed in the housing and partially located in the installation cavity 51 . The first filter 21 , the total reflection lens 22 , the second filter 31 , the third filter 24 , the fourth filter 33 , the fifth filter 42 and the second lens 43 are arranged in the installation cavity 51 , and can be fixedly connected with the tube shell 5 by means of clamping, bonding, etc. The casing 5 is used to install and fix the above-mentioned optical path structure, so as to stabilize the relative positions between the optical components in the optical path structure, and maintain the accurate and reliable propagation of light in the optical path structure.

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

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformations made by the contents of the description and drawings of the present invention, or the direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. An optical path structure applied to an optical device, the optical path structure comprising:

a first optical signal assembly for emitting and receiving parallel light of a plurality of wavelengths;

the first optical path component comprises a first optical filter and a first optical receiving device, the first optical filter is obliquely arranged on an emergent light path of the first optical signal component, and the first optical receiving device is used for receiving light with a first wavelength reflected by the first optical filter;

the second optical path component comprises a second optical filter and a second light receiving device, and the second optical filter is obliquely arranged on the light emitting path of the first optical signal component and is positioned on one side of the second optical filter, which faces away from the first optical signal component; the second light receiving device is used for receiving the light with the second wavelength, which is transmitted through the first optical filter and reflected by the second optical filter.

2. The optical path structure according to claim 1, wherein the optical path structure further comprises a total reflection mirror;

the total reflection lens and the first light receiving device are arranged between the first optical filter and the first optical signal component and are respectively positioned at two sides of a light outlet light path of the first optical signal component; the total reflection lens is used for reflecting the light with the first wavelength reflected by the first optical filter to the first light receiving device.

3. The optical path structure according to claim 2, wherein an included angle between the plane where the first optical filter is located and the light-emitting path of the first optical signal component is defined as α, an included angle between the plane where the total reflection lens is located and the light-emitting path of the first optical signal component is defined as β, α is greater than or equal to 70 ° and less than 90 °, and β is greater than or equal to 25 ° and less than 90 °;

and/or an included angle between a plane where the second optical filter is located and an outgoing light path of the first optical signal component is defined to be gamma, wherein gamma is 45 degrees.

4. The optical path structure according to claim 2, wherein the first optical path component further comprises a third filter 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, the third filter being configured to pass the light of the first wavelength.

5. The optical path structure according to claim 1, wherein the first filter and the second filter are high-pass filters;

and/or the first wavelength is less than the second wavelength.

6. The optical path structure of claim 1, wherein the second optical path component further comprises a fourth filter disposed adjacent to the second light receiving device and in the optical path between the second light receiving device and the second filter, the fourth filter being configured to pass light of the second wavelength.

7. The optical circuit structure of claim 1, wherein the first optical signal component comprises a fiber optic adapter and a first lens;

the optical fiber adapter and the first lens are coaxially arranged, the first lens is located between the optical fiber adapter and the first optical filter, and the first lens is used for enabling light emitted by the optical fiber adapter to be emitted into the first optical filter in parallel.

8. The optical circuit structure according to any one of claims 1 to 7, further comprising a second optical signal component including a first light emitting device, a fifth filter, and a second lens;

the second lens, the fifth optical filter and the first light emitting device are sequentially arranged on an extended light path of a light emitting light path of the first optical signal component at intervals;

and the light with the third wavelength emitted by the first light emitting device sequentially penetrates through the fifth optical filter, the second lens, the second optical filter and the first optical filter and then enters the first optical signal assembly.

9. The optical circuit structure of claim 8, wherein the second optical signal component further comprises a second light emitting device;

the second light emitting device is arranged close to the fifth optical filter and positioned on one side of the light emitting optical path of the first light emitting device, and light with a fourth wavelength emitted by the second light emitting device sequentially penetrates through the second lens, the second optical filter and the first optical filter after being reflected by the fifth optical filter and enters the first optical signal assembly;

the third wavelength is greater than the fourth wavelength, which is greater than the second wavelength.

10. A light device, comprising:

the optical path structure according to any one of claims 1 to 9;

the tube, the tube is equipped with the installation cavity, the light path structure is located the tube to part is located in the installation cavity.

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