CN217084653U - Miniature long optical path optical cavity - Google Patents
Miniature long optical path optical cavity Download PDFInfo
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- CN217084653U CN217084653U CN202220478156.0U CN202220478156U CN217084653U CN 217084653 U CN217084653 U CN 217084653U CN 202220478156 U CN202220478156 U CN 202220478156U CN 217084653 U CN217084653 U CN 217084653U
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- reflecting mirror
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Abstract
The utility model provides a micro long-optical-path optical cavity, which comprises optical components, wherein the optical components are arranged at two ends of a shell, and the interior of the shell forms an optical cavity; the optical assembly comprises a first reflecting mirror and a second reflecting mirror, the first reflecting mirror is a concave reflecting mirror, the second reflecting mirror is provided with a light beam incident hole and a light beam emergent hole respectively, the first reflecting mirror is arranged in a reflecting end cover, the second reflecting mirror is arranged in a transmitting end cover, and the reflecting end cover and the transmitting end cover are correspondingly arranged at two ends of the shell through light beam adjusting structures; the transmitting end cover is provided with an information acquisition module, and the shell is provided with an air inlet and outlet structure and a heating structure. The utility model has the advantages of simple integral structure, easy processing and assembly, and the optical path size is than big.
Description
Technical Field
The utility model relates to an optics gas sensor detects technical field, concretely relates to miniature long light journey optical cavity.
Background
The industrial gas sensor is an important guarantee for gas safety, and with the rapid development of economy in China and the continuous deep optimization of industrial application of the Internet of things, the industrial sensor gradually develops towards low power consumption, miniaturization and portability in recent years. The existing optical gas sensor has the advantages of long service life, high precision, poisoning resistance and the like, and is widely applied to the field of gas detection; the optical cavity is a core component of the sensor, and directly determines the performance and the external dimension of the sensor.
With the increasing requirement for precision in the field of gas detection, the optical path of the optical gas absorption cell needs to be further increased. It is required to realize a longer optical path in a limited space.
SUMMERY OF THE UTILITY MODEL
To the not enough in the above-mentioned background art, the utility model provides a miniature long optical path optical cavity, overall structure is simple, workable and assembly, and the optical path size ratio is big.
In order to solve the technical problem, the utility model discloses a following technical scheme: a micro long-optical-path optical cavity comprises optical components, wherein the optical components are arranged at two ends of a shell, and an optical cavity is formed inside the shell; the optical assembly comprises a first reflecting mirror and a second reflecting mirror, the first reflecting mirror is a concave reflecting mirror, the second reflecting mirror is provided with a light beam incident hole and a light beam emergent hole respectively, the first reflecting mirror is arranged in a reflecting end cover, the second reflecting mirror is arranged in a transmitting end cover, and the reflecting end cover and the transmitting end cover are correspondingly arranged at two ends of the shell through light beam adjusting structures; the transmitting end cover is provided with an information acquisition module, and the shell is provided with an air inlet and outlet structure and a heating structure.
The first reflecting mirror and the second reflecting mirror are coaxially arranged, and epoxy resin glue is adopted for adhesion between the first reflecting mirror and the reflecting end cover and between the second reflecting mirror and the transmitting end cover.
The light beam adjusting structure comprises a first adjusting screw and a first adjusting jackscrew, the reflecting end cover is connected with one end of the shell through the first adjusting screw and the first adjusting jackscrew, and the emitting end cover is connected with the other end of the shell through the first adjusting screw and the first adjusting jackscrew.
The light beam adjusting structure also comprises a collimator which is fixed in the collimator fixing seat by epoxy resin glue and corresponds to a light beam incident hole on the second reflecting mirror; the collimator fixing seat is connected with the emission end cover through a second adjusting screw and a second adjusting jackscrew.
Sealing structures are arranged between the reflection end cover and the shell and between the emission end cover and the shell, and the sealing structures are O-shaped rings made of rubber.
The information acquisition module adopts a light detector which is arranged on the transmitting end cover and corresponds to the light beam emergent hole on the second reflector.
The air inlet and outlet structure comprises two air nozzles or at least one diffusion hole, and the air nozzles or the diffusion hole are communicated with an optical cavity formed in the shell.
The heating structure comprises a heating pipe, a counter bore matched with the heating pipe is arranged on the shell, and the heating pipe is arranged in the counter bore.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides a miniature long optical path optical cavity with simple structure, easy processing and assembly and large optical path size ratio, after a light source emits collimated light beam which enters through a light beam entrance hole of a reflector II, the collimated light beam is reflected back and forth between the reflector I and the reflector II, a circle of reflecting light spots are formed on the reflector I, an inner circle of reflecting light spots and an outer circle of reflecting light spots are formed on the reflector II at the same time, and finally the light beam is emitted through a light beam exit hole of the reflector II to reach a light detector;
2. adjusting the emergent light beam to the light beam emergent hole of the second reflector by respectively arranging an adjusting structure of the optical reflector and an adjusting structure of the light beam incident end on the reflecting end cover and the transmitting end cover, and slightly adjusting the corresponding adjusting screw and the screwing-in depth of the adjusting jackscrew according to the actual distribution of light beam spots;
3. the O-shaped ring arranged between the shell and the reflection end cover and between the shell and the emission end cover can ensure the structural sealing property of the optical cavity;
4. the optical cavity is subjected to temperature control by additionally arranging the heating device on the shell of the optical cavity, and a heat-insulating material is additionally arranged on the surface of the optical cavity for heat insulation when the temperature is required to be controlled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of the structure of the present invention;
FIG. 2 is a front view of the structure of the present invention;
FIG. 3 is a sectional view of the structure of the present invention;
FIG. 4 is a right side view of FIG. 1;
FIG. 5 is a schematic structural diagram of a collimator and a collimator holder;
fig. 6 is a light spot distribution diagram of the present invention;
fig. 7 is an optical simulation diagram of the present invention.
In the figure, 1 is a reflection end cover, 2 is a first reflection mirror, 3 is an O-shaped ring, 4 is an air tap, 5 is a shell, 6 is an emission end cover, 7 is a second reflection mirror, 8 is a light detector, 9 is a collimator fixing seat, 10 is a collimator, 11 is a first adjusting screw, 12 is a second adjusting screw, 13 is a second adjusting jackscrew, 14 is a first adjusting jackscrew, and 15 is a heating pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in fig. 1 and 3, the utility model provides a miniature long optical path optical cavity, including optical assembly, optical assembly sets up in the both ends of casing 5, and the inside of casing 5 forms optical cavity. The optical assembly comprises a first reflecting mirror 2 and a second reflecting mirror 7, wherein the first reflecting mirror 2 is a concave reflecting mirror, the second reflecting mirror 7 is provided with a light beam incident hole and a light beam emergent hole respectively, the first reflecting mirror 2 and the second reflecting mirror 7 are coaxially arranged, the first reflecting mirror 2 is installed in a reflecting end cover 1, the second reflecting mirror 7 is installed in an emitting end cover 6, and preferably, epoxy resin is adopted for adhesion and fixation between the first reflecting mirror 2 and the reflecting end cover 1 and between the second reflecting mirror 7 and the emitting end cover 6. Reflection end cover 1 and emission end cover 6 all correspond through the light beam adjustment structure and install the both ends at casing 5, are provided with information acquisition module on the emission end cover 6. The information acquisition module adopts a light detector 8, and the light detector 8 is arranged on the transmitting end cover 6 and corresponds to the light beam emergent hole on the second reflector 7.
After the collimated light beam emitted by the light source enters the perforation through the light beam of the second reflecting mirror, the collimated light beam is reflected back and forth between the first reflecting mirror and the second reflecting mirror, a circle of reflected light spots are formed on the first reflecting mirror, an inner circle of reflected light spots and an outer circle of reflected light spots are formed on the second reflecting mirror, and finally the light beam is emitted through the light beam emitting hole of the second reflecting mirror and reaches the optical detector. The distribution of the obtained light spots is shown in fig. 6, and the optical simulation thereof is shown in fig. 7.
Further, the light beam adjusting structure comprises a first adjusting screw 11 and a first adjusting jackscrew 14, the reflecting end cover 1 is connected with one end of the shell 5 through the first adjusting screw 11 and the first adjusting jackscrew 14, and the emitting end cover 6 is connected with the other end of the shell 5 through the first adjusting screw 11 and the first adjusting jackscrew 14. The adjusting screw I11 and the adjusting jackscrew I14 which are arranged at one end of the reflector I2 can be used as an adjusting structure of the optical reflector, the adjusting screw I11 and the adjusting jackscrew I14 which are arranged at one end of the reflector II 7 can be used as an adjusting structure of a light beam incidence end, the screwing depth of the adjusting screw I11 and the adjusting jackscrew I14 is adjusted in a micro-scale mode according to the actual distribution of light beam spots, and the emergent light beam is adjusted to a light beam emergent hole of the reflector II 7.
As shown in fig. 4 and 5, the adjusting structure of the light beam incident end disposed at one end of the second reflecting mirror 7 further includes a collimator 10, the collimator 10 is fixed in the collimator fixing seat 9 by epoxy resin glue, and the collimator 10 corresponds to the light beam incident hole on the second reflecting mirror 7. The collimator fixing seat 9 is connected with the emission end cover 6 through a second adjusting screw 12 and a second adjusting jackscrew 13. And similarly, referring to the actual distribution of the light spots of the light beam, the incident angle of the incident light beam can be slightly adjusted by slightly adjusting the second adjusting screw 12 and the screwing depth of the second jackscrew 13, and the emergent light beam is adjusted to the light beam emergent hole of the second reflector 7.
Sealing structures are arranged between the reflecting end cover 1 and the shell 5 and between the emitting end cover 6 and the shell 5, and the sealing structures adopt O-shaped rings 3 made of rubber so as to guarantee the structural sealing performance of the optical cavity.
In embodiment 2, as shown in fig. 2, an air inlet and outlet structure is disposed on a housing 5, the air inlet and outlet structure includes two air nozzles 4 or at least one diffusion hole, and the air nozzles 4 or the diffusion hole are both communicated with an optical cavity formed inside the housing 5. The two air nozzles used for air inlet and air outlet respectively can be arranged on one side of the shell, the air nozzles can be integrally connected with the shell, and can also be additionally arranged on the shell through threads, and the structure is a pump suction type cavity. Or at least one diffusion hole (capable of eliminating air inlet and outlet nozzles) is arranged around the shell, and the structure is a diffusion cavity.
Still be provided with heating structure on casing 5, heating structure includes two heating pipes 15, is equipped with on casing 5 two with 15 assorted counter bores of heating pipe, heating pipe 15 install in the counter bore that corresponds, carry out temperature control to optical cavity through installing the heating device additional, and need install insulation material additional when needing temperature control on the optical cavity surface promptly the casing outside and keep warm.
The other structure is the same as embodiment 1.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A miniature long optical path optical cavity is characterized in that: the optical module comprises optical modules, wherein the optical modules are arranged at two ends of a shell (5), and an optical cavity is formed inside the shell (5); the optical assembly comprises a first reflecting mirror (2) and a second reflecting mirror (7), the first reflecting mirror (2) is a concave reflecting mirror, the second reflecting mirror (7) is respectively provided with a light beam incident hole and a light beam emergent hole, the first reflecting mirror (2) is installed in the reflecting end cover (1), the second reflecting mirror (7) is installed in the transmitting end cover (6), and the reflecting end cover (1) and the transmitting end cover (6) are correspondingly installed at two ends of the shell (5) through light beam adjusting structures; the transmitting end cover (6) is provided with an information acquisition module, and the shell (5) is provided with an air inlet and outlet structure and a heating structure.
2. The micro long optical path optical cavity of claim 1, wherein: the first reflecting mirror (2) and the second reflecting mirror (7) are coaxially arranged, and epoxy resin glue is adopted for adhesion between the first reflecting mirror (2) and the reflecting end cover (1) and between the second reflecting mirror (7) and the emitting end cover (6).
3. The micro long optical path optical cavity of claim 1 or 2, wherein: the light beam adjusting structure comprises a first adjusting screw (11) and a first adjusting jackscrew (14), the reflecting end cover (1) is connected with one end of the shell (5) through the first adjusting screw (11) and the first adjusting jackscrew (14), and the emitting end cover (6) is connected with the other end of the shell (5) through the first adjusting screw (11) and the first adjusting jackscrew (14).
4. The micro long optical path optical cavity of claim 3, wherein: the light beam adjusting structure further comprises a collimator (10), the collimator (10) is fixed in a collimator fixing seat (9) by epoxy resin glue, and the collimator (10) corresponds to a light beam incident hole in the second reflecting mirror (7); the collimator fixing seat (9) is connected with the emission end cover (6) through a second adjusting screw (12) and a second adjusting jackscrew (13).
5. The micro long optical path optical cavity of claim 1, 2 or 4, wherein: sealing structures are arranged between the reflecting end cover (1) and the shell (5) and between the emitting end cover (6) and the shell (5), and the sealing structures adopt O-shaped rings (3) made of rubber.
6. The micro long optical path optical cavity of claim 5, wherein: the information acquisition module adopts a light detector (8), and the light detector (8) is arranged on the transmitting end cover (6) and corresponds to the light beam emergent hole on the second reflector (7).
7. The micro long optical path optical cavity of claim 1 or 6, wherein: the air inlet and outlet structure comprises two air nozzles (4) or at least one diffusion hole, and the air nozzles (4) or the diffusion hole are communicated with an optical cavity formed inside the shell (5).
8. The micro long optical path optical cavity of claim 7, wherein: the heating structure comprises a heating pipe (15), a counter bore matched with the heating pipe (15) is formed in the shell (5), and the heating pipe (15) is installed in the counter bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220478156.0U CN217084653U (en) | 2022-03-07 | 2022-03-07 | Miniature long optical path optical cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220478156.0U CN217084653U (en) | 2022-03-07 | 2022-03-07 | Miniature long optical path optical cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217084653U true CN217084653U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220478156.0U Active CN217084653U (en) | 2022-03-07 | 2022-03-07 | Miniature long optical path optical cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217084653U (en) |
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2022
- 2022-03-07 CN CN202220478156.0U patent/CN217084653U/en active Active
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