CN219715203U - Small fluorescent signal excitation detection device - Google Patents
Small fluorescent signal excitation detection device Download PDFInfo
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- CN219715203U CN219715203U CN202223433820.9U CN202223433820U CN219715203U CN 219715203 U CN219715203 U CN 219715203U CN 202223433820 U CN202223433820 U CN 202223433820U CN 219715203 U CN219715203 U CN 219715203U
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- detection device
- fluorescent signal
- optical fiber
- fiber adapter
- signal excitation
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- 230000005284 excitation Effects 0.000 title claims abstract description 57
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000013307 optical fiber Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model belongs to the technical field of photoelectric measurement, and relates to a small fluorescent signal excitation detection device which comprises a base, a fluorescent signal excitation detection device arranged on the upper surface of the base and an optical fiber adapter fixing part arranged on one side of the fluorescent signal excitation detection device, wherein the optical fiber adapter fixing part positions an optical fiber adapter above the fluorescent signal excitation detection device, the fluorescent signal excitation detection device comprises a substrate, an LED excitation light source and a PD (potential difference) photodiode, and the light emitting direction of the LED excitation light source and the light receiving direction of the PD photodiode are upward. The utility model can provide light energy for fluorescent substances of optical fibers by utilizing the LED excitation light source, and can measure fluorescent signals by utilizing the PD photodiode to receive afterglow generated by the fluorescent substances after the fluorescent substances are irradiated with light, thereby omitting a light splitting sheet and signal attenuation caused by the light splitting sheet and realizing fluorescent signal measurement by only a small structure.
Description
Technical Field
The utility model relates to the technical field of photoelectric measurement, in particular to a small fluorescent signal excitation detection device.
Background
The optical fiber adapter in the optical fiber sensor collects and detects fluorescent signals, and the structure adopted in measurement generally comprises an LED excitation light source and a PD photodiode which are distributed and installed at a right angle of 90 degrees, and light path splitting is carried out through a light splitting sheet arranged at an angle of 45 degrees. The structure is complex, the cost is high, and the attenuation of signals through the light splitting sheet is large.
There is therefore a need to provide a new excitation-detection device and apparatus to solve the above problems.
Disclosure of Invention
The utility model mainly aims to provide a small fluorescence signal excitation detection device which can integrate and miniaturize excitation fluorescence signals and detection fluorescence signals, and a light splitting sheet is omitted, so that fluorescence signal attenuation caused by the light splitting sheet is avoided, sensitivity is improved, and fluorescence signal detection can be realized only by a small structure.
The utility model realizes the aim through the following technical scheme:
the utility model provides a small-size fluorescence signal excitation detection device, includes the base, locates fluorescence signal excitation detection device of base upper surface and locate the optical fiber adapter fixed part of fluorescence signal excitation detection device one side, optical fiber adapter fixed part is located the optical fiber adapter the top of fluorescence signal excitation detection device, fluorescence signal excitation detection device include the base plate and set up in LED excitation light source and the PD photodiode of base plate homonymy, the luminous direction of LED excitation light source with the light receiving direction of PD photodiode up.
Specifically, a baffle is arranged between the LED excitation light source and the PD photodiode.
Specifically, the optical fiber adapter fixing part is further provided with a first condensing lens and a second condensing lens, the first condensing lens focuses light emitted by the LED excitation light source on the optical fiber adapter, and the second condensing lens focuses fluorescent signals emitted by the optical fiber adapter on the PD photodiode.
The technical scheme of the utility model has the beneficial effects that:
the utility model can provide excitation light energy for fluorescent substances of optical fibers by utilizing the LED excitation light source, and receive fluorescent signals generated after the fluorescent substances are excited by using the PD photodiode, so that a light splitting sheet is omitted, attenuation caused by the light splitting sheet is avoided, the sensitivity is improved, and the measurement of the fluorescent signals can be realized only by a small structure.
Drawings
FIG. 1 is a front view of a compact fluorescence signal excitation detection device according to an embodiment;
FIG. 2 is a schematic electrical diagram of a fluorescence signal excitation detection device.
The figures represent the numbers:
1-a base;
2-fluorescent signal excitation detection device, 21-LED excitation light source, 22-PD photodiode and 23-baffle
31-a bracket, 32 a-a first condenser, 32 b-a second condenser;
4-fiber optic adapter, 41-fluorescent section.
Detailed Description
The present utility model will be described in further detail with reference to specific examples.
Examples:
as shown in fig. 1 and 2, the small fluorescent signal excitation detection device of the present utility model includes a base 1, a fluorescent signal excitation detection device 2 disposed on an upper surface of the base 1, and an optical fiber adapter fixing portion disposed on one side of the fluorescent signal excitation detection device 2, wherein the fluorescent signal excitation detection device 2 includes a substrate 21, and an LED excitation light source 22 and a PD photodiode 23 disposed on the substrate, a light emitting direction of the LED excitation light source 22 and a light receiving direction of the PD photodiode 23 face upward, and the optical fiber adapter fixing portion includes a bracket 31 for positioning the optical fiber adapter 4 above the fluorescent signal excitation detection device 2. When the fluorescence signal excitation detecting device 2 is energized, the LED excitation light source 22 is lighted and then irradiates the optical fiber adapter 4, and the optical fiber adapter 4 has a fluorescence portion 41 at the rear thereof, and is excited to emit afterglow after receiving excitation light. After the LED excitation light source 22 stops excitation light emission, the fluorescent portion 41 continues to emit afterglow for a certain time, and then receives the afterglow from the PD photodiode 23, so that the PD photodiode 23 can output a fluorescent signal, and the effect of fluorescent signal measurement is achieved. The device omits the light splitting sheet, avoids attenuation caused by the light splitting sheet, improves sensitivity, and can realize fluorescent signal measurement only by a small structure.
As shown in fig. 1, the optical fiber adapter fixing portion is further provided with a first condenser lens 32a and a second condenser lens 32b, the first condenser lens 32a focuses the light emitted from the LED excitation light source 21 onto the optical fiber adapter 4, and the second condenser lens 32b focuses the fluorescent signal emitted from the optical fiber adapter 4 onto the PD photodiode 22. Both the first condenser 32a and the second condenser 32b can focus light, making detection more sensitive.
As shown in fig. 1, a baffle 24 is provided between the LED excitation light source 22 and the PD photodiode 23. The baffle 24 can prevent the light emitted by the LED excitation light source 22 from directly irradiating the PD photodiode 23, so that the PD photodiode 23 only receives the afterglow generated by the optical fiber adapter 4 to output a signal, thereby ensuring the measurement accuracy.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (3)
1. A small fluorescent signal excitation detection device is characterized in that: the fluorescent signal excitation detection device comprises a base, a fluorescent signal excitation detection device arranged on the upper surface of the base and an optical fiber adapter fixing part arranged on one side of the fluorescent signal excitation detection device, wherein the optical fiber adapter fixing part positions an optical fiber adapter above the fluorescent signal excitation detection device, the fluorescent signal excitation detection device comprises a substrate, an LED excitation light source and a PD photodiode, the LED excitation light source is arranged on the same surface of the substrate, and the light emitting direction of the LED excitation light source and the light receiving direction of the PD photodiode face upwards.
2. The compact fluorescent signal excitation detection apparatus of claim 1, wherein: and a baffle is arranged between the LED excitation light source and the PD photodiode.
3. The compact fluorescent signal excitation detection apparatus of claim 1, wherein: the optical fiber adapter fixing part is also provided with a first condensing lens and a second condensing lens, the first condensing lens focuses light emitted by the LED excitation light source on the optical fiber adapter, and the second condensing lens focuses fluorescent signals emitted by the optical fiber adapter on the PD photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223433820.9U CN219715203U (en) | 2022-12-21 | 2022-12-21 | Small fluorescent signal excitation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223433820.9U CN219715203U (en) | 2022-12-21 | 2022-12-21 | Small fluorescent signal excitation detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219715203U true CN219715203U (en) | 2023-09-19 |
Family
ID=88001162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223433820.9U Active CN219715203U (en) | 2022-12-21 | 2022-12-21 | Small fluorescent signal excitation detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219715203U (en) |
-
2022
- 2022-12-21 CN CN202223433820.9U patent/CN219715203U/en active Active
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