CN203216636U - Optical system applied to fluorescent fiber temperature sensor - Google Patents
Optical system applied to fluorescent fiber temperature sensor Download PDFInfo
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- CN203216636U CN203216636U CN2013201217952U CN201320121795U CN203216636U CN 203216636 U CN203216636 U CN 203216636U CN 2013201217952 U CN2013201217952 U CN 2013201217952U CN 201320121795 U CN201320121795 U CN 201320121795U CN 203216636 U CN203216636 U CN 203216636U
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Abstract
The utility model relates to an optical system applied to a fluorescent fiber temperature sensor, which is characterized in that lights emitted by an ultraviolet excitation light source pass through a first lens to form parallel excitation lights, the parallel excitation lights are input into a light splitter at a certain incidence angle, and excitation lights obtained at the normal direction of the light splitter are coupled and enter into a fiber collimator which can be connected with a fluorescent probe, so as to excite the fluorescent probe to emit fluorescence with temperature information. The fluorescence sent back by the fiber collimator is input to the light splitter for light splitting, passes through a second lens, and finally enter a photoelectric conversion device. The self-focusing lenses and the fiber collimator are employed for coupling in optical paths, and are respectively coated with narrowband filtering membranes and a reflection reducing film, thereby enhancing light collection efficiency, isolating stray lights, and improving sensitivity of the sensor; the light splitter employs a blazed gating, thereby thoroughly separating the excitation lights from the emission fluorescence, and ensuring precision and accuracy of test; and the optical system is compact in structure, flexible in operation, and easy to realize miniaturization of the whole sensor.
Description
Technical field
The utility model relates to a kind of optical system, relates to a kind of optical system that is applied to fluorescent optical fiber temperature sensor or rather, belongs to technical field of optical fiber sensing.
Background technology
Fluorescent optical fiber temperature sensor has advantages such as reliability height, good insulation preformance, anti-electromagnetic interference (EMI), good reproducibility, response speed be fast, therefore study the fluorescence optical fiber temperature sensor technology, and be applied in strong-electromagnetic field, high-tension electricity and poisonous and harmful, the rugged surroundings such as inflammable and explosive and in the biomedicine in the fields such as direct detection to biosome, have very important meaning.
The ultimate principle of fluorescent optical fiber temperature sensor is exciting light source activating fluorescent probe emitting fluorescence, the fluorescence that carries temperature information is received and light-splitting processing by optical system through the optical fiber passback, detect the generation electric signal finally by the photosignal pick-up unit, demodulate temperature information by signal processing apparatus.Optical system is to form the indispensable part of fluorescent optical fiber temperature sensor, it has born the coupling of exciting light and optical fiber, the work such as light splitting of the coupling of fluorescence and optical fiber and exciting light and fluorescence, thus fluorescent optical fiber temperature sensor optical system be the decisive parts of sensing capabilities quality.
At present, the optical system that fluorescent optical fiber temperature sensor extensively adopts comprises as shown in Figure 1: exciting light source, excitation optical filter, emission optical filter, lens, fluorescent probe and photoelectric detection system.At first the exciting light launched of exciting light source 1 is by 12 reflections of excitation optical filter, 13 transmissions of emission optical filter, be coupled into fluorescent probe 7 through lens 14, activating fluorescent probe 7 sends fluorescence, and fluorescence reflexes to photoelectric detection system 10 and receives through lens 14 couplings, emission optical filter.Its exciting light source of this optical system and photoelectric detection system are positioned at same direction, though structure is compact, but because light-dividing device adopts optical filter, filter coating can not guarantee 100% transmission and reflection, caused the low exciting light that reaches of fluorescence collection efficiency to separate halfway shortcoming with fluorescence, owing to adopt single lens to be coupled, cause the loss of exciting light and fluorescence simultaneously, had a strong impact on temperature measurement accuracy and the accuracy of fluorescent optical fiber temperature sensor.
The utility model content
The purpose of this utility model just is to provide a kind of optical system that is applied to fluorescent optical fiber temperature sensor, solving the shortcoming of existing fluorescent optical fiber temperature sensor, described system is a kind of optical system of novel rational in infrastructure, light splitting is thorough, collection efficiency is high fluorescent optical fiber temperature sensor.
For reaching the purpose of this utility model, the utility model provides a kind of novel optical system, comprise the ultraviolet exciting light source, the light of ultraviolet exciting light source is focused into parallel exciting light by first lens with the light of the ultraviolet exciting light source of incident, be collimated on the light-dividing device, through the light-dividing device reflection, enter the optical fiber collimator that can connect fluorescent probe, activating fluorescent probe emitting fluorescence.Transmit the fluorescence of returning through optical fiber collimator and enter the light-dividing device light splitting, enter photoelectric detection system at last by second Lens Coupling.
Basic functional principle is that the exciting light that ultraviolet exciting light source 1 is launched forms parallel excitation light 3 by first lens 2, incide on the light-dividing device 4, the one-level that obtains exciting light 3 on light-dividing device 4 normal directions glares, 5 conduction are coupled into fluorescent probe 7 through optical fiber collimator, the activating fluorescent powder sends fluorescence 8,, this fluorescence 8 carries temperature information.Fluorescence 8 incides on the light-dividing device 4 through optical fiber collimator 5, carries out light splitting by grating spectrum center 11, is coupled to photoelectric detection system 10 by second lens 9 and receives.
The optical system of described a kind of fluorescent optical fiber temperature sensor, what it is characterized in that described ultraviolet exciting light source employing is the 405nm ultraviolet light-emitting diode.
The optical system of described a kind of fluorescent optical fiber temperature sensor is characterized in that described first lens adopt GRIN Lens.Described GRIN Lens end face is coated with and receives 650nm fluorescence narrow-band-filter film.
The optical system of described a kind of fluorescent optical fiber temperature sensor, what it is characterized in that described light-dividing device employing is blazed grating.Described blazed grating groove number be 1200 lines right/mm.
The optical system of described a kind of fluorescent optical fiber temperature sensor, the optimized incidence matter that it is characterized in that described parallel excitation light are 18 ° ± 2 °.
The optical system of described a kind of fluorescent optical fiber temperature sensor, the angle that it is characterized in that described photoelectric detection system and blazed grating normal are 42 ° ± 2 °.
The optical system of described a kind of fluorescent optical fiber temperature sensor is characterized in that being coated with 405nm ultraviolet source exciting light narrow-band-filter film on the described optical fiber collimator collimation head.
The optical system of described a kind of fluorescent optical fiber temperature sensor is characterized in that described second lens adopt GRIN Lens.Described GRIN Lens end face is coated with 405nm ultraviolet source exciting light and 650nm fluorescence anti-reflection film.
The optical system of described a kind of fluorescent optical fiber temperature sensor is characterized in that the central light beam of described optical fiber collimator and second lens is overlapped in blazed grating spectral emissions center.
Because the coupling of the utility model light path adopts GRIN Lens and optical fiber collimator, compact conformation, flexible operation is easy to realize the miniaturization of whole sensor; GRIN Lens and optical fiber collimator have been coated with narrow-band-filter film and anti-reflection film respectively, thereby have strengthened signal light intensity, have completely cut off the influence of parasitic light, have improved transducer sensitivity; Light-dividing device adopts blazed grating, has realized thoroughly separating of exciting light and emitting fluorescence, has guaranteed precision and the accuracy of test.
So the utlity model has following advantage:
1, the light path coupling adopts GRIN Lens and optical fiber collimator, compact conformation, and flexible operation is easy to realize the miniaturization of whole sensor;
2, GRIN Lens and optical fiber collimator have been coated with narrow-band-filter film and anti-reflection film respectively, thereby have strengthened collection efficiency, have completely cut off the influence of parasitic light, have improved transducer sensitivity;
3, light-dividing device adopts blazed grating, has realized thoroughly separating of exciting light and emitting fluorescence, has guaranteed precision and the accuracy of test.
Description of drawings
Fig. 1 is the optical system structure synoptic diagram of conventional fluorescent fibre optic temperature sensor.
Fig. 2 is structural representation of the present utility model.
Among the figure: 1-exciting light source, 2-first lens, 3-parallel excitation light, the 4-light-dividing device, 5-optical fiber collimator, 6-optical fiber mounting flange, the 7-fluorescent probe, 8-carries the fluorescence of temperature information, 9-second lens, 10-photoelectric detection system, 11-grating spectrum launching centre, 12-encourages optical filter, and 13-launches optical filter, 14-lens.
Embodiment
Below in conjunction with Figure of description the utility model is described further:
The utility model provides a kind of novel optical system, comprise the ultraviolet exciting light source, the light that it is characterized in that ultraviolet exciting light source 1 is focused into parallel excitation light 3 by first lens 2 with the light of the ultraviolet exciting light source of incident and is collimated on the light-dividing device 4, reflect through light-dividing device, namely the one-level that obtains parallel excitation light in the normal direction of light-dividing device 4 glares, enter the optical fiber collimator 5 that connects fluorescent probe 7, activating fluorescent probe 7 is launched the fluorescence 8 that has temperature information, transmit the fluorescence of returning through optical fiber collimator 5 again and enter the light-dividing device light splitting, by 9 couplings of second lens, enter photoelectric detection system 10 at last.
A kind of optical system that is applied to fluorescent optical fiber temperature sensor that the utility model provides comprises ultraviolet exciting light source 1, and adopting wavelength is the 405nm ultraviolet light-emitting diode of 650nm fluorescence excitation wavelength; First lens 2 adopt the self-focusing Green lens, the divergent beams of incident can be focused into parallel excitation light 3; The surface of first lens 2 is coated with 405nm exciting light anti-reflection film and narrow-band-filter film, can reduce the loss of exciting light, avoids the influence of parasitic light simultaneously; Light-dividing device 4 adopt the groove numbers be 1200 lines right/blazed grating of mm, adopt blazed grating can obtain the optimal separation of exciting light and fluorescence, parallel excitation light 3 optimal incident angle in fact are 18 ± 2 °, and the central light beam solid axle of parallel excitation light 3 and fluorescence 8 is in grating spectrum launching centre 11; Optical fiber collimator 5 is positioned on the normal at blazed grating center, and the one-level that receives parallel excitation light 3 glares; Optical fiber collimator 5 end faces are coated with the anti-reflection film of parallel excitation light 3 and fluorescence 8, improve exciting and receiving efficiency of fluorescence, strengthen fluorescence signal; Optical fiber collimator 5 connects fluorescent probe 7 by optical fiber mounting flange 6, and fluorescent probe 7 receives exciting light 3 excitation-emission and goes out fluorescence 8; Second lens, 9 coupling fluorescence signal to photoelectric detection system 10, the second lens 9 end faces are coated with the anti-reflection and narrow-band-filter film of fluorescence, improve the fluorescence signal collection efficiency, avoid the influence of parasitic light simultaneously, have improved detection sensitivity.
Claims (10)
1. the optical system of a fluorescent optical fiber temperature sensor, comprise the ultraviolet exciting light source, the light that it is characterized in that the ultraviolet exciting light source is focused into parallel exciting light by first lens with the light of the ultraviolet exciting light source of incident and is collimated on the light-dividing device, reflect through light-dividing device, enter the optical fiber collimator that connects fluorescent probe, the activating fluorescent probe is launched the fluorescence of band temperature information, transmit the fluorescence of returning through optical fiber collimator again and enter the light-dividing device light splitting, enter photoelectric detection system at last by second Lens Coupling.
2. optical system according to claim 1, what it is characterized in that described ultraviolet exciting light source adopts is that wavelength is the 405nm ultraviolet light-emitting diode of 650nm fluorescence excitation wavelength.
3. optical system according to claim 1 is characterized in that described first lens adopt GRIN Lens, is coated with at the GRIN Lens end face and receives 650nm fluorescence narrow-band-filter film.
4. optical system according to claim 1, what it is characterized in that described light-dividing device adopts is blazed grating, described blazed grating groove number be 1200 lines right/mm
5. optical system according to claim 1, the incident angle that it is characterized in that described parallel excitation light is 18 ° ± 2 °.
6. optical system according to claim 1, the angle that it is characterized in that described photoelectric detection system and blazed grating normal is 42 ° ± 2 °.
7. optical system according to claim 1 is characterized in that being coated with 405nm ultraviolet source exciting light narrow-band-filter film at described optical fiber collimator collimation head.
8. optical system according to claim 1 is characterized in that described second lens adopt GRIN Lens, and described GRIN Lens end face is coated with 405nm ultraviolet source exciting light and 650nm fluorescence anti-reflection film.
9. optical system according to claim 1 is characterized in that the central light beam of described optical fiber collimator and second lens is overlapped in blazed grating spectral emissions center.
10. optical system according to claim 1 is characterized in that optical fiber collimator passes through the optical fiber mounting flange and connects fluorescent probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201217952U CN203216636U (en) | 2013-03-15 | 2013-03-15 | Optical system applied to fluorescent fiber temperature sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013201217952U CN203216636U (en) | 2013-03-15 | 2013-03-15 | Optical system applied to fluorescent fiber temperature sensor |
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| CN203216636U true CN203216636U (en) | 2013-09-25 |
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| CN2013201217952U Expired - Lifetime CN203216636U (en) | 2013-03-15 | 2013-03-15 | Optical system applied to fluorescent fiber temperature sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018278A (en) * | 2016-07-11 | 2016-10-12 | 上海爱涛信息科技有限公司 | Miniaturized photoelectric module for fluorescence detection |
| CN106969854A (en) * | 2017-04-18 | 2017-07-21 | 大连世有电力科技有限公司 | Optical fiber temperature-measurement equipment pair fibre-optical probes |
| WO2017129131A1 (en) * | 2016-01-29 | 2017-08-03 | 缪爱俊 | Light path-coupling device and fluorescence temperature-sensing optical system |
| CN112945417A (en) * | 2021-02-26 | 2021-06-11 | 王世有 | Dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide fluorescent powder |
-
2013
- 2013-03-15 CN CN2013201217952U patent/CN203216636U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017129131A1 (en) * | 2016-01-29 | 2017-08-03 | 缪爱俊 | Light path-coupling device and fluorescence temperature-sensing optical system |
| CN106018278A (en) * | 2016-07-11 | 2016-10-12 | 上海爱涛信息科技有限公司 | Miniaturized photoelectric module for fluorescence detection |
| CN106969854A (en) * | 2017-04-18 | 2017-07-21 | 大连世有电力科技有限公司 | Optical fiber temperature-measurement equipment pair fibre-optical probes |
| CN112945417A (en) * | 2021-02-26 | 2021-06-11 | 王世有 | Dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide fluorescent powder |
| CN112945417B (en) * | 2021-02-26 | 2022-06-28 | 王世有 | Dual-wavelength fluorescent optical fiber temperature measurement system based on europium-doped yttrium oxide fluorescent powder |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |