CN204302180U - A kind of trace-gas sensors light path system and air chamber - Google Patents
A kind of trace-gas sensors light path system and air chamber Download PDFInfo
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- CN204302180U CN204302180U CN201420832104.4U CN201420832104U CN204302180U CN 204302180 U CN204302180 U CN 204302180U CN 201420832104 U CN201420832104 U CN 201420832104U CN 204302180 U CN204302180 U CN 204302180U
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Abstract
The utility model discloses a kind of trace-gas sensors light path system and air chamber, described light path system comprises incident optical fiber collimator, outgoing optical fiber collimator, front mirror and back mirror, and front mirror and back mirror are concave spherical mirror and concave spherical surface is oppositely arranged; The minute surface of front mirror is provided with parallel incident through hole and outgoing through hole; Incident optical collimating apparatus, outgoing optical fiber collimator respectively with incident through hole, outgoing through hole is coaxial and be arranged on the outside of front mirror away from back mirror, the light beam launched for making incident optical collimating apparatus is by the incident through hole directive back mirror on front mirror, between the catoptron of front and back after reflection for several times, penetrated through outgoing optical fiber collimator by the outgoing through hole on front mirror.Light path system of the present utility model, light beam is multiple reflections between the catoptron of front and back, reaches very large absorption light path in the finite space, is applicable to the fiber gas sensor of compact conformation, accurately detecting trace gas.
Description
Technical field
The utility model belongs to fiber gas sensor technical field, is specifically related to a kind of trace-gas sensors light path system, also relates to a kind of trace-gas sensors air chamber simultaneously.
Background technology
Fiber gas sensor is a kind of new gas sensor occurred the late nineteen eighties in 20th century, have that measurement sensistivity is high, gas distinguishing ability is strong, respond the features such as fast, strong to the resistivity of the environmental interference such as temperature, humidity, be the most promising a kind of fiber gas sensor.The sensing element of fiber gas sensor is for absorbing air chamber, and its design is directly connected to the volume of whole fiber gas sensor and adheres to surveying sensitivity.
Optical gas sensor based on gas absorption principle all follows Bill's Lambert law, and namely when the extinction material of a branch of collimated monochromatic ligth perpendicular through a certain even non-scatter, its absorbance is directly proportional to the thickness of the densimeter absorption layer of extinction material.That is, the absorptivity of gas to the light of permanent wavelength depends on optical path length and gas concentration; As long as there are enough absorption light paths, just can measure the absorption signal of very such small concentrations (trace) gas, and then gas concentration is known in reckoning.In theory, if will reach the detectivity of PPM level, the absorption optical path length of needs often reaches several meters to tens of rice.Due to the restriction of site environment and checkout equipment, adopt common correlation light path to be unpractical, be difficult to the requirement meeting on-line testing, therefore need a kind of light path system met compared with long light-path small volume again.
Summary of the invention
The purpose of this utility model is to provide a kind of trace-gas sensors light path system met compared with long light-path small volume again.
Second object of the present utility model is to provide a kind of trace-gas sensors air chamber.
In order to realize above object, the technical scheme that the utility model adopts is:
A kind of trace-gas sensors light path system, comprise incident optical fiber collimator, outgoing optical fiber collimator, front mirror and back mirror, described front mirror and back mirror are concave spherical mirror, and the concave spherical surface of front mirror and back mirror is oppositely arranged; The minute surface of described front mirror is provided with two parallel through holes, is respectively incident through hole and outgoing through hole; Described incident optical collimating apparatus, outgoing optical fiber collimator are coaxial with described incident through hole, outgoing through hole respectively, and be arranged on the outside of front mirror away from back mirror, the light beam launched for making incident optical collimating apparatus is by the incident through hole directive back mirror on front mirror, between the catoptron of front and back after reflection for several times, penetrated through outgoing optical fiber collimator by the outgoing through hole on front mirror.
The concave spherical surface of described front mirror and back mirror all plates and is provided with high reflectance rete.
Described front mirror and back mirror are arranged with optical axis.
Described incident through hole and outgoing through hole with the optical axis of front mirror for axis of symmetry is symmetrical arranged.
A kind of trace-gas sensors air chamber, comprise and enclose by front end face, rear end face and sidewall the absorption chamber for gas absorption formed, described front end face, rear end face are separately installed with front mirror, back mirror, described front mirror and back mirror are concave spherical mirror, and concave spherical surface is oppositely arranged; The minute surface of described front mirror is provided with two parallel through holes, is respectively incident through hole and outgoing through hole; Described front mirror is provided with collimating apparatus support away from the outside of back mirror, described collimating apparatus support is provided with incident optical collimating apparatus and outgoing optical fiber collimator, described incident optical collimating apparatus, outgoing optical fiber collimator are coaxially arranged with described incident through hole, outgoing through hole respectively, the light beam launched for making incident optical collimating apparatus is by the incident through hole directive back mirror on front mirror, in described absorption chamber, between the catoptron of front and back after for several times reflection, penetrated through outgoing optical fiber collimator by the outgoing through hole on front mirror.
The concave spherical surface of described front mirror and back mirror all plates and is provided with high reflectance rete.
Described front mirror and back mirror are arranged with optical axis.
Described incident through hole and outgoing through hole with the optical axis of front mirror for axis of symmetry is symmetrical arranged.
Trace-gas sensors light path system of the present utility model, adopt the concave spherical mirror that two concave spherical surfaces are oppositely arranged, and the minute surface of front mirror is provided with two parallel through holes, the light beam that incident optical collimating apparatus is launched is by the incident through hole directive back mirror on front mirror, before and after light beam between catoptron after for several times reflection, by the outgoing through hole on front mirror through outgoing optical fiber collimator coupling injection; Light beam is multiple reflections between the catoptron of front and back, reaches very large absorption light path, meet the requirement of optical fiber on-line checkingi in the finite space, is applicable to the fiber gas sensor of compact conformation, accurately detecting trace gas.
Trace-gas sensors air chamber of the present utility model, the front/rear end of absorption chamber arranges concave spherical mirror that concave spherical surface is oppositely arranged respectively, and the minute surface of front mirror is provided with two parallel through holes, the light beam that incident optical collimating apparatus is launched enters absorption chamber directive back mirror by the incident through hole on front mirror, light beam in described absorption chamber, between the catoptron of front and back after for several times reflection, by the outgoing through hole on front mirror through outgoing optical fiber collimator coupling injection; Light beam is multiple reflections between the catoptron of front and back, reaches very large absorption light path in the finite space in absorption chamber, makes kind and the concentration of its detectable multiple trace gas; This kind of air chamber has longer light path, meets the requirement of optical fiber on-line checkingi, reduces the volume of fiber gas sensor, improves sensitivity and the degree of accuracy of gas detect, makes fiber gas sensor compact conformation, can realize accurately detecting to trace gas; Adopt optical fiber collimator to be coupled out into light beam, be convenient to in-site installation and use, be easy to networking, be applicable to applying.
Accompanying drawing explanation
Fig. 1 is the structural representation of the trace-gas sensors light path system of embodiment 1;
Fig. 2 is the light path schematic diagram of light beam between the catoptron of front and back in the trace-gas sensors light path system of embodiment 1;
Fig. 3 is the side view of Fig. 2;
Fig. 4 is the light path sketch of the trace-gas sensors light path system of embodiment 1;
Fig. 5 is the structural representation of the trace-gas sensors air chamber of embodiment 2.
Embodiment
Below in conjunction with embodiment, the utility model is further described.
Embodiment 1
The trace-gas sensors light path system of the present embodiment, as shown in Figure 1, comprise incident optical fiber collimator 1, outgoing optical fiber collimator 2, front mirror 3 and back mirror 4, described front mirror 3 and back mirror 4 are concave spherical mirror, on concave spherical surface, all plating is provided with high reflectance rete, and front mirror 3 is relative with the concave spherical surface of back mirror 4 and arrange with optical axis; The minute surface of described front mirror 3 is provided with two parallel through holes, is respectively incident through hole 5 and outgoing through hole 6, described incident through hole 5 with outgoing through hole 6 with the optical axis of front mirror 3 for axis of symmetry is symmetrical arranged; Described incident optical collimating apparatus 1, outgoing optical fiber collimator 2 are coaxial with described incident through hole 5, outgoing through hole 6 respectively, and be arranged on the outside of front mirror 3 away from back mirror 4, the light beam launched for making incident optical collimating apparatus 1 is by the incident through hole 5 directive back mirror 4 on front mirror 3, between the catoptron of front and back after reflection for several times, by the outgoing through hole 6 on front mirror 3 through outgoing optical fiber collimator 2 coupling injection.
The light path of the trace-gas sensors light path system of the present embodiment, as shown in Figure 2,3, 4, laser beam is launched by incident optical collimating apparatus 1, injected by the incident through hole 5 (index path being designated as 1-1 (in)) on front mirror 3, back mirror 4 forms first photoelectricity 2-1, after reflection, light beam 7 forms luminous point 1-2 on front mirror 3, light beam 7 is between the catoptron of front and back after so many secondary reflection, and light beam is penetrated through outgoing optical fiber collimator 2 coupling by the outgoing through hole 6 (index path being designated as 1-11 (out)) on front mirror 3.In this process, the advance track of light beam between two catoptrons is 1-1 (in) → 2-1 → 1-2 → 2-2 → 1-3 → 2-3 → 1-4 → 2-4 → 1-5 → 2-5 → 1-6 → 2-6 → 1-7 → 2-7 → 1-8 → 2-8 → 1-9 → 2-9 → 1-10---2-10---1-11 (out), and final beam is coupled to outgoing optical fiber collimator 2; Light beam through 20 secondary reflections, thus substantially prolongs light path.
Embodiment 2
A kind of trace-gas sensors air chamber of the present embodiment, as shown in Figure 5, comprise and enclose by front end face 8, rear end face 9 and sidewall 11 absorption chamber 12 for gas absorption formed, described front end face 8, rear end face 9 are respectively equipped with and lead to absorption chamber 12 and coaxial axis hole, front mirror 3, back mirror 4 is separately installed with in axis hole, described front mirror 3 and back mirror 4 are the circular reflector of concave spherical surface, described front mirror 3 relative with the concave spherical surface of back mirror 4 (concave spherical surface is all towards absorption chamber) and arranging with optical axis, the minute surface of described front mirror 3 is provided with two parallel through holes, is respectively incident through hole 5 and outgoing through hole 6, described incident through hole 5 with outgoing through hole 6 with the optical axis of front mirror 3 for axis of symmetry is symmetrical arranged, described front mirror 3 is provided with collimating apparatus support 10 away from the outside of back mirror 4, described collimating apparatus support 10 is provided with incident optical collimating apparatus 1 and outgoing optical fiber collimator 2, described incident optical collimating apparatus 1, outgoing optical fiber collimator 2 respectively with described incident through hole 3, outgoing through hole 4 is coaxially arranged, the light beam launched for making incident optical collimating apparatus 1 injects described absorption chamber 12 and directive back mirror 4 by the incident through hole 5 on front mirror 3, in described absorption chamber 12, between the catoptron of front and back after reflection for several times, by the outgoing through hole 6 on front mirror 3 through outgoing optical fiber collimator 2 coupling injection.
The light path of a kind of trace-gas sensors air chamber of the present embodiment, with embodiment 1 as Fig. 2, 3, shown in 4, laser beam is launched by incident optical collimating apparatus 1, absorption chamber 12 is injected by the incident through hole 5 (index path being designated as 1-1 (in)) on front mirror 3, back mirror 4 forms first photoelectricity 2-1, after reflection, light beam 7 forms luminous point 1-2 on front mirror 3, light beam 7 is in absorption chamber 12, between the catoptron of front and back after multiple reflections, light beam is penetrated through outgoing optical fiber collimator 2 coupling by the outgoing through hole 6 (index path being designated as 1-11 (out)) on front mirror 3.In this process, the advance track of light beam between two catoptrons is 1-1 (in) → 2-1 → 1-2 → 2-2 → 1-3 → 2-3 → 1-4 → 2-4 → 1-5 → 2-5 → 1-6 → 2-6 → 1-7 → 2-7 → 1-8 → 2-8 → 1-9 → 2-9 → 1-10---2-10---1-11 (out), and final beam is coupled to outgoing optical fiber collimator 2; Light beam through 20 secondary reflections, thus substantially prolongs the light path in absorption chamber.This trace-gas sensors air chamber has longer light path, meet the requirement of optical fiber on-line checkingi, reduce the volume of fiber gas sensor, improve sensitivity and the degree of accuracy of gas detect, make fiber gas sensor compact conformation, accurately detecting can be realized to trace gas; Adopt optical fiber collimator to be coupled out into light beam, be convenient to in-site installation and use, be easy to networking, be applicable to applying.
Claims (8)
1. a trace-gas sensors light path system, it is characterized in that: comprise incident optical fiber collimator, outgoing optical fiber collimator, front mirror and back mirror, described front mirror and back mirror are concave spherical mirror, and the concave spherical surface of front mirror and back mirror is oppositely arranged; The minute surface of described front mirror is provided with two parallel through holes, is respectively incident through hole and outgoing through hole; Described incident optical collimating apparatus, outgoing optical fiber collimator are coaxial with described incident through hole, outgoing through hole respectively, and be arranged on the outside of front mirror away from back mirror, the light beam launched for making incident optical collimating apparatus is by the incident through hole directive back mirror on front mirror, between the catoptron of front and back after reflection for several times, penetrated through outgoing optical fiber collimator by the outgoing through hole on front mirror.
2. trace-gas sensors light path system according to claim 1, is characterized in that: the concave spherical surface of described front mirror and back mirror all plates and is provided with high reflectance rete.
3. trace-gas sensors light path system according to claim 1 and 2, is characterized in that: described front mirror and back mirror are arranged with optical axis.
4. trace-gas sensors light path system according to claim 3, is characterized in that: described incident through hole and outgoing through hole with the optical axis of front mirror for axis of symmetry is symmetrical arranged.
5. a trace-gas sensors air chamber, it is characterized in that: comprise and enclose by front end face, rear end face and sidewall the absorption chamber for gas absorption formed, described front end face, rear end face are separately installed with front mirror, back mirror, described front mirror and back mirror are concave spherical mirror, and concave spherical surface is oppositely arranged; The minute surface of described front mirror is provided with two parallel through holes, is respectively incident through hole and outgoing through hole; Described front mirror is provided with collimating apparatus support away from the outside of back mirror, described collimating apparatus support is provided with incident optical collimating apparatus and outgoing optical fiber collimator, described incident optical collimating apparatus, outgoing optical fiber collimator are coaxially arranged with described incident through hole, outgoing through hole respectively, the light beam launched for making incident optical collimating apparatus is by the incident through hole directive back mirror on front mirror, in described absorption chamber, between the catoptron of front and back after for several times reflection, penetrated through outgoing optical fiber collimator by the outgoing through hole on front mirror.
6. trace-gas sensors air chamber according to claim 5, is characterized in that: the concave spherical surface of described front mirror and back mirror all plates and is provided with high reflectance rete.
7. the trace-gas sensors air chamber according to claim 5 or 6, is characterized in that: described front mirror and back mirror are arranged with optical axis.
8. trace-gas sensors air chamber according to claim 7, is characterized in that: described incident through hole and outgoing through hole with the optical axis of front mirror for axis of symmetry is symmetrical arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420832104.4U CN204302180U (en) | 2014-12-24 | 2014-12-24 | A kind of trace-gas sensors light path system and air chamber |
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| CN201420832104.4U CN204302180U (en) | 2014-12-24 | 2014-12-24 | A kind of trace-gas sensors light path system and air chamber |
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| CN204302180U true CN204302180U (en) | 2015-04-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502292A (en) * | 2014-12-24 | 2015-04-08 | 郑州光力科技股份有限公司 | Light path system of trace gas sensor and air chamber |
| CN106959271A (en) * | 2016-01-12 | 2017-07-18 | 徐州旭海光电科技有限公司 | Long light path air chamber with stabilization package structure |
| CN109520931A (en) * | 2018-12-29 | 2019-03-26 | 青岛海纳光电环保有限公司 | Gas absorption chamber |
| CN114609044A (en) * | 2022-03-07 | 2022-06-10 | 汉威科技集团股份有限公司 | Long-optical-path gas absorption cell reflection optical system |
-
2014
- 2014-12-24 CN CN201420832104.4U patent/CN204302180U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502292A (en) * | 2014-12-24 | 2015-04-08 | 郑州光力科技股份有限公司 | Light path system of trace gas sensor and air chamber |
| CN106959271A (en) * | 2016-01-12 | 2017-07-18 | 徐州旭海光电科技有限公司 | Long light path air chamber with stabilization package structure |
| CN109520931A (en) * | 2018-12-29 | 2019-03-26 | 青岛海纳光电环保有限公司 | Gas absorption chamber |
| CN114609044A (en) * | 2022-03-07 | 2022-06-10 | 汉威科技集团股份有限公司 | Long-optical-path gas absorption cell reflection optical system |
| CN114609044B (en) * | 2022-03-07 | 2023-04-28 | 汉威科技集团股份有限公司 | Long-optical-path gas absorption cell reflection optical system |
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Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: Power Polytron Technologies Inc Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee before: Zhengzhou GL Tech Company |
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