CN215218521U - Uniform light source generating device for short-wave infrared imaging spectrum system - Google Patents
Uniform light source generating device for short-wave infrared imaging spectrum system Download PDFInfo
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- CN215218521U CN215218521U CN202121109624.9U CN202121109624U CN215218521U CN 215218521 U CN215218521 U CN 215218521U CN 202121109624 U CN202121109624 U CN 202121109624U CN 215218521 U CN215218521 U CN 215218521U
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- 238000001228 spectrum Methods 0.000 title claims description 8
- 238000003331 infrared imaging Methods 0.000 title claims description 6
- 239000013307 optical fiber Substances 0.000 claims abstract description 69
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 13
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 13
- 239000010937 tungsten Substances 0.000 claims abstract description 13
- 150000002367 halogens Chemical class 0.000 claims abstract description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000837 restrainer Substances 0.000 claims 1
- 238000000265 homogenisation Methods 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000003760 hair shine Effects 0.000 abstract 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000000701 chemical imaging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- -1 tungsten halogen Chemical class 0.000 description 1
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Abstract
The utility model belongs to the optical instrument field especially relates to an infrared generating device who evenly shines of shortwave, the incident end of the optical fiber bundle set that the optical fiber bundle set constitutes is retrained fixedly by the front end restraint ware, halogen tungsten lamp light source closes on and shines the incident end at the optical fiber bundle set, the light-emitting end of each optical fiber bundle that the optical fiber bundle was concentrated is retrained by the rear end restraint ware is fixed, with root optical fiber bundle in incident end position and region rather than in light-emitting end position and regional difference, the light-emitting end of optical fiber bundle set is provided with linear fresnel lens. In the scheme, the same number of point light sources can be obtained at the light-emitting end of the optical fiber bundle set according to the specific number of the optical fiber bundle set, so that the preliminary homogenization of the light sources is realized, and the light sources are further homogenized by the difference of the areas and the positions of the same optical fiber bundle at the light-emitting end and the incident end, so that a uniform light source with uniform illumination and brightness meeting the requirements is provided for the linear Fresnel lens.
Description
Technical Field
The utility model belongs to the optical instrument field especially relates to an infrared even light source's of shortwave generating device.
Background
For a mineral sample, specific components of the mineral sample have strong absorption effect on light waves under specific wavelengths, so the component composition of the mineral can be rapidly detected by measuring the intensity of the light waves under each wavelength of reflected light of the sample, namely the principle of measuring the mineral components by an imaging spectrum system. For the rapid detection of the mineral components in the field, the imaging spectrum system is the best detection instrument. Aiming at the component characteristics and the spectral absorption characteristics of minerals, the wavelength of a light source required in the detection process is in the range of 900-1700 nm, namely short-wave infrared light. As mentioned above, since the principle of the imaging spectroscopy system is to measure the absorption intensity of a sample to light waves, a light source needs to be uniformly irradiated on the sample, otherwise, a large measurement error occurs; meanwhile, a larger light source intensity is required, otherwise, insufficient light intensity received by the imaging spectrum measurement system will also increase measurement errors.
Therefore, a uniform short-wave infrared light source with enough intensity is a basic premise for improving the detection precision. There are many different methods for obtaining a uniform light source. Most commonly, a plurality of point-like light sources with small size are used to form a uniform light source in a certain spatial arrangement manner, or a plurality of lens structures are combined to further improve the uniformity of the light source, but such a method is structurally complicated and occupies a large space when being arranged, and meanwhile, the available point-like light sources are required. In addition, there is a method using an integrating sphere, which is technically mature but limited by a structure that generates a limited light source size, and also has a large light loss and a large limitation in output light intensity. Furthermore, the uniformity of the light source is improved by the light guide plate, but the light source has low brightness and limited use scenes. Aiming at the requirements of light source wavelength and light intensity in mineral detection, no available uniform light source product or small-size point light source exists in the market at present, and only a halogen tungsten lamp light source with larger size can be selected. Due to the size limitation of the imaging spectrum system, a sufficient number of halogen tungsten lamp light sources cannot be arranged to increase the uniformity of the light sources, and the light intensity after the light guide plate is used is not sufficient for measurement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, be convenient for with pointolite homogenization, luminance height be used for shortwave infrared imaging spectroscopy system's even light source generating device.
In order to achieve the purpose, the uniform light source generating device for the short-wave infrared imaging spectrum system is characterized in that the incident end of an optical fiber bundle set formed by an optical fiber bundle set is restrained and fixed by a front end restraint device, a halogen tungsten lamp light source is close to and irradiates the incident end of the optical fiber bundle set, the light emitting end of each optical fiber bundle in the optical fiber bundle set is fixedly restrained by a rear end restraint device, the position and the area of the same optical fiber bundle at the incident end are different from the position and the area of the same optical fiber bundle at the light emitting end, and the light emitting end of the optical fiber bundle set is provided with a linear Fresnel lens.
In the scheme, firstly, the halogen tungsten lamp light source is irradiated to the optical fiber bundle set, the same number of point light sources can be obtained at the light outlet end of the optical fiber bundle set according to the specific number of the optical fiber bundle set, the primary homogenization of the light sources is realized, and in addition, the light sources are further homogenized according to the difference of the areas and the positions of the same optical fiber bundle at the light outlet end and the light inlet end, so that a uniform light source with uniform illumination and meeting the requirements on brightness is provided for the linear Fresnel lens, and a stable, reliable and uniform light source is provided for the next detection.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a perspective view of the rear end restraint according to the present invention.
Detailed Description
As shown in fig. 1 and 2, in the uniform strip light source generating device for a short-wave infrared imaging spectroscopy system, an incident end of an optical fiber bundle set 20 formed by an optical fiber bundle set is constrained and fixed by a front end constraining device 30, a tungsten halogen lamp light source 10 is irradiated on the incident end of the optical fiber bundle set 20 in a close manner, a light emitting end of each optical fiber bundle in the optical fiber bundle set 20 is fixedly constrained by a rear end constraining device 40, the position and the area of the incident end of the same optical fiber bundle are different from the position and the area of the light emitting end of the same optical fiber bundle, and a linear fresnel lens 50 is arranged at the light emitting end of the optical fiber bundle set 20.
The optical fiber bundle set 20 in the above scheme is formed by a set of a proper number of single optical fiber bundles, and the specific number is determined according to the irradiated range. The light-emitting end of the optical fiber bundle set 20 enables the light sources to converge in the corresponding area directions by arranging the linear Fresnel lens 50, the light intensity of the light sources in the generated bright irradiation area can be increased under the condition that the light source of the halogen tungsten lamp is not changed, the utilization efficiency of the light sources is improved, and the light spot profile and the intensity of the uniform irradiation area can be flexibly adjusted by adjusting the distance between the linear Fresnel lens 50 and the light-emitting end of the optical fiber bundle set 20. The halogen tungsten lamp light source 10 can provide light waves with the wavelength range of 900-1700 nm, and the emitted light waves are approximately emitted into the optical fiber in parallel, so that the light waves can meet the requirement of the incident angle of the optical fiber.
The core of the present invention is that the position and area of the same optical fiber bundle 21 at the incident end are different from the position and area of the same optical fiber bundle at the light emitting end, that is, the position and area of the certain optical fiber bundle 21 in the optical fiber bundle set 20 at the incident end are possibly changed at the light emitting end, when the certain optical fiber bundle 21 at the incident end is at the edge position, the optical fiber bundle set should be reasonably positioned at the middle part at the light emitting end, or at least the area and position of the adjacent optical fiber bundle 21 around the certain optical fiber bundle set should be changed, that is, the relationship between the adjacent optical fibers 21 at the incident end and the light emitting end of each optical fiber bundle 21 should be changed, so as to make the illuminance in the bright area presented by the optical fiber bundle set 20 composed of each optical fiber bundle 21 uniform.
The preferred scheme is that each optical fiber bundle 21 in the optical fiber bundle set 20 is in a re-uniform mixed state at the position and area of the light-emitting end compared with the position and area of the light-incident end. That is, the optical fiber bundle 21 originally located in the middle of the incident end is dispersed to the edge at the light-emitting end, the optical fiber bundle 21 originally located at the edge of the incident end is divided into the middle region of the light-emitting end, and the incident end is divided at the light-emitting end which is originally closely arranged, so that the optimal light source homogenizing effect can be realized.
If the test sample is transported by a conveyor belt into the imaging spectroscopy system for scanning testing, the source shape of the imaging spectroscopy system is optimized for the ribbon shape, and the corresponding back-end constraint 40 constrains the fiber optic bundle set 20 to a ribbon-like region. Therefore, the light source in the strip-shaped area is required to be just distributed over the width of the whole conveyor belt in the length direction, and the width of the light source is only about 10mm, so that the intensity of the generated light source can be enhanced, and the light source is utilized most effectively.
Specifically, the rear restraint 40 is a square block, through holes 41 penetrating through the block are uniformly distributed on the rear restraint, and each optical fiber bundle is inserted into and fixed in the through hole 41.
The light guide fiber bundles forming the point light sources are arranged in a uniform crossing mode, and the uniformity of the light sources is further improved.
The light source 10 of the halogen tungsten lamp is covered with a reflecting lampshade 11, and the reflected light provided by the reflecting lampshade 11 irradiates the incident end of the optical fiber bundle set 20 at a parallel light speed.
The reflector 11 and the front restraint 30 are disposed on the front frame 60, the rear restraint 40 is connected to the frame plate 42, and the frame plate 42 is further connected to the linear fresnel lens 50. This ensures stability of the relative positions between the elements.
The side of the section of the bracket plate 42 is provided with a trunnion or a pin hole 421 which is hinged with the rear bracket 70 and is matched with a locking unit, so that the deflection angle of the clamping structure can be manually adjusted and locked at a proper position according to the requirement of the light position.
The utility model discloses in, the optic fibre material is common-use optic fibre, its light wave wavelength range that is suitable for with the utility model provides a wavelength range is comparatively identical, considers the utility model provides a light conduction distance is very short, and consequently the loss among the conduction process is very little.
The utility model provides a scheme of halogen tungsten lamp light source 10 and optical fiber bundle set 20 looks adaptation is exactly divided into tens punctiform light sources through optical fiber bundle 21 with the great halogen tungsten lamp light source 10 of size, solves the utility model discloses the no available punctiform light source problem in the wavelength range.
Claims (7)
1. A uniform light source generating device for a short-wave infrared imaging spectrum system is characterized in that: the incident end of an optical fiber bundle set (20) formed by the optical fiber bundle set is restrained and fixed by a front end restraint device (30), a halogen tungsten lamp light source (10) is close to and irradiates the incident end of the optical fiber bundle set (20), the light-emitting end of each optical fiber bundle in the optical fiber bundle set (20) is fixedly restrained by a rear end restraint device (40), the position and the area of the incident end of the same optical fiber bundle are different from the position and the area of the light-emitting end of the same optical fiber bundle, and a linear Fresnel lens (50) is arranged at the light-emitting end of the optical fiber bundle set (20).
2. The light source generating device according to claim 1, wherein: the position and the area of each optical fiber bundle in the optical fiber bundle set (20) at the light outlet end are in a state of being re-uniformly mixed compared with the position and the area at the incident end.
3. The light source generating device according to claim 1 or 2, wherein: the rear end restrainer (40) restrains the optical fiber bundle set (20) into a ribbon-like region.
4. The light source generating device according to claim 3, wherein: the rear restraint device (40) is in a square block shape, through holes (41) penetrating through the block body are uniformly distributed on the rear restraint device, and each optical fiber bundle is inserted into and fixed in the through hole (41).
5. The light source generating device according to claim 1, wherein: the light source (10) of the halogen tungsten lamp is covered with a reflecting lampshade (11), and the reflected light provided by the reflecting lampshade (11) irradiates the incident end of the optical fiber bundle set (20) at a parallel light speed.
6. The light source generating device according to claim 1, 4 or 5, wherein: the reflecting lampshade (11) and the front end restraint device (30) are arranged on the front support (60), the rear end restraint device (40) is connected to the support plate (42), and the support plate (42) is further connected with the linear Fresnel lens (50).
7. The light source generating device of claim 6, wherein: a trunnion or a pin hole (421) is arranged on the section side of the bracket plate (42) and is hinged with the rear bracket (70) and is matched with a locking unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121109624.9U CN215218521U (en) | 2021-05-21 | 2021-05-21 | Uniform light source generating device for short-wave infrared imaging spectrum system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121109624.9U CN215218521U (en) | 2021-05-21 | 2021-05-21 | Uniform light source generating device for short-wave infrared imaging spectrum system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215218521U true CN215218521U (en) | 2021-12-17 |
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ID=79420584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121109624.9U Active CN215218521U (en) | 2021-05-21 | 2021-05-21 | Uniform light source generating device for short-wave infrared imaging spectrum system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215218521U (en) |
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2021
- 2021-05-21 CN CN202121109624.9U patent/CN215218521U/en active Active
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Address after: Building 11, Phase II, Yingtang Industrial Park, No. 103 Huatuo Lane, Shulu Community Service Center, High tech Zone, Hefei City, Anhui Province 230000 Patentee after: ANHUI SPECREATION INSTRUMENT SCIENCE & TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 230000 8th floor, building 1, No. 228, Wanshui Road, high tech Zone, Shushan District, Hefei City, Anhui Province Patentee before: ANHUI SPECREATION INSTRUMENT SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |