CN210571024U - Miniature optical fiber spectrometer - Google Patents
Miniature optical fiber spectrometer Download PDFInfo
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- CN210571024U CN210571024U CN201921813697.9U CN201921813697U CN210571024U CN 210571024 U CN210571024 U CN 210571024U CN 201921813697 U CN201921813697 U CN 201921813697U CN 210571024 U CN210571024 U CN 210571024U
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- subassembly
- grating
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- fiber optic
- concatenation
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- 239000013307 optical fiber Substances 0.000 title description 5
- 238000001914 filtration Methods 0.000 claims abstract description 28
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims description 14
- 229920001410 Microfiber Polymers 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- 239000003658 microfiber Substances 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 11
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000003595 spectral effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a miniature fiber optic spectrometer, comprises a box bod, be provided with the slit subassembly that supplies the light to pass through on the box body, be provided with two diaphragm subassemblies, collimation subassembly, concatenation grating subassembly, focus subassembly, filtering subassembly and detecting component in the box body, the incident light is followed penetrate into in the slit subassembly, restrain stray light through two diaphragm subassemblies, later with the angle of settlement incide obtain collimated light on the collimation subassembly, collimated light obtains the diffraction light through concatenation grating subassembly, wherein, concatenation grating subassembly is formed by polylith grating concatenation, and different gratings can improve the diffraction efficiency of collimated light different wave bands, and focus the diffraction by the focusing subassembly at last on the detecting component who is provided with filtering subassembly, filtering subassembly can filtering second grade diffraction light. The utility model discloses a miniature fiber optic spectrometer can effectively restrain stray light, improve sensitivity in the whole wave spectrum range, also can realize fine filtering to second grade diffraction light simultaneously.
Description
Technical Field
The utility model relates to an optical instrument field, concretely relates to miniature fiber optic spectrometer.
Background
The fiber spectrometer adopts a CCD or COMS detector, combines a specific light path design and an optical lens, and solves the problems of long scanning time, large mechanical abrasion, large volume and high cost of the original mechanical scanning type spectrometer. The broadband optical fiber spectrometer (200nm-1100nm) covers ultraviolet light, visible light and infrared light, so that the broadband optical fiber spectrometer has been developed vigorously in a plurality of application fields such as color sorting production line test, environment-friendly water vapor detection, LED and other light source laboratories and production line test in recent years.
In the prior art, a micro fiber optic spectrometer is proposed in patent No. CN109100020A, which retains the most core elements of the spectrometer, thereby realizing the miniaturization of the spectrometer, but the existing micro fiber optic spectrometer has the following disadvantages: stray light intensity, low diffraction efficiency (low sensitivity) and high cost exist, and further application of the broadband fiber spectrometer is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a miniature fiber optic spectrometer, on prior art's miniature fiber optic spectrometer basis, can effectively restrain stray light, improve sensitivity in the whole wave spectrum range, also can realize fine filtering to second grade diffraction light simultaneously.
In order to solve the technical problem, the utility model provides a miniature fiber optic spectrometer, comprises a box bod, be provided with the slit subassembly that supplies the light to pass through on the box body, be provided with two diaphragm subassemblies, collimation subassembly, concatenation grating subassembly, focusing component, filtering component and determine module in the box body, the incident light is followed penetrate into in the slit subassembly, restrain stray light through two diaphragm subassemblies, later with the angle of settlement incide obtain collimated light on the collimation subassembly, collimated light obtains the diffraction light through the concatenation grating subassembly, wherein, the concatenation grating subassembly is formed by the concatenation of polylith grating, and different gratings can improve the diffraction efficiency of collimated light different wave bands, and the last focus is focused on the determine module that is provided with filtering component by focusing component, filtering component can filter second grade diffraction light.
The utility model discloses a preferred embodiment, further include two diaphragm subassemblies are including the first diaphragm and the second diaphragm that set gradually, optical system NA can be restricted to the first diaphragm, has avoided the system stray light that leads to because NA mismatches, the second diaphragm can restrict the produced stray light of first diaphragm.
The utility model discloses a preferred embodiment, further include the concatenation grating subassembly includes the first grating that can be to the high-efficient diffraction of ultraviolet and visible light wave band and the second grating that can be to the high-efficient diffraction of visible light and infrared light wave band of concatenation setting.
The utility model discloses a preferred embodiment, further include the setting of concatenation grating subassembly is on the grating adjustment seat, the grating adjustment seat can rotate on the box body, can adjust the angle of concatenation grating subassembly for the incident light.
The utility model discloses a preferred embodiment, further include the filtering component is the tertiary filter, the tertiary filter is including the first filter area, second filter area and the third filter area that set gradually, the perspective wave band in first filter area is 200nm ~ 385nm, the second filter area is 350 nm's long pass filter, the third filter area is 590 nm's long pass filter.
The utility model discloses a preferred embodiment, further include the slit subassembly includes mount pad, mounting flange and slit, the slit sets up mounting flange's centre, mounting flange passes through the bolt fastening and is in on the mount pad.
In a preferred embodiment of the present invention, the collimating assembly further includes a collimating holder fixed in the box and a collimating mirror disposed on the collimating holder.
The utility model discloses a preferred embodiment, further include the focus subassembly is including fixing focus fixing base and the focusing mirror that sets up on focus fixing base in the box body.
In a preferred embodiment of the present invention, it is further included that the detecting component is a CCD detector.
The utility model has the advantages that:
one of which the utility model discloses to the high problem of current miniature spectrum appearance at broadband spectral detection in-process stray light, the utility model discloses increase the structure of two diaphragms, can effectively restrain stray light.
Secondly, the utility model discloses to the problem of the high sensitivity of current miniature spectrum appearance in the broadband spectrum detection process can not realize whole wave spectrum range, the utility model discloses a polylith grating carries out the method of concatenation, and wherein, each grating is different to the diffraction efficiency of the light of different wave bands, chooses the highest diffraction efficiency that every grating was set a light, and the method through the concatenation at last improves holistic diffraction efficiency to improve the sensitivity in the whole wave spectrum range.
Thirdly, the utility model discloses an optical filter subassembly can realize highly ending to the secondary spectrum to reach and realize fine filtering effect to the secondary spectrum.
Drawings
FIG. 1 is a schematic structural diagram of a micro fiber spectrometer of the present invention;
fig. 2 is a schematic structural diagram of the optical filtering assembly of the present invention;
fig. 3 is a schematic structural diagram of the slit assembly of the present invention.
The reference numbers in the figures illustrate: 1. a box body; 2. a slit assembly; 21. a mounting seat; 22. a fixed flange; 23. a slit; 3. a dual diaphragm assembly; 31. a first diaphragm; 32. a second diaphragm; 4. a collimating assembly; 41. a collimation fixing seat; 42. a collimating mirror; 5. splicing the grating components; 51. a first grating; 52. a second grating; 53. a grating adjusting seat; 6. a focusing assembly; 61. a focusing holder; 62. a focusing mirror; 7. a filter assembly; 71. a first light filtering area; 72. a second light filtering area; 73. a third light filtering area; 8. and a detection component.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, an embodiment of a micro fiber spectrometer of the present invention includes a box body 1, a slit assembly 2 for passing incident light is disposed on the box body 1, a double diaphragm assembly 3, a collimating assembly 4, a splicing grating assembly 5, a focusing assembly 6, a filtering assembly 7 and a detecting assembly 8 are disposed in the box body 1, the incident light is incident from the slit assembly 2, stray light is suppressed by the double diaphragm assembly 3, and then the incident light is incident on the collimating assembly 4 at a predetermined angle to obtain collimated light, the collimated light is diffracted light by the splicing grating assembly 5, wherein the splicing grating assembly 5 is formed by splicing a plurality of gratings, each grating has different diffraction efficiencies for light of different wave bands, the highest diffraction efficiency of each grating for light is selected, and finally the overall diffraction efficiency is improved by a splicing method, and the focusing assembly 6 focuses the diffracted light on the detecting assembly 8 provided with the filtering assembly 7, the filter component 7 can filter out the second-order diffracted light.
In this embodiment, the double-diaphragm assembly 3 includes a first diaphragm 31 and a second diaphragm 32 that are sequentially arranged, the first diaphragm 31 can limit an NA of the optical system, and system stray light caused by mismatching of the NA is avoided, the second diaphragm 32 can limit stray light generated by the first diaphragm 31, where the NA is a numerical aperture in the optical system to measure an angle range of light that the optical system can collect, and the numerical aperture describes a cone angle size when light enters and exits the optical fiber, so as to determine a light receiving capability and a spatial resolution of the optical system, and the first diaphragm 31 in this embodiment is an aperture diaphragm to limit a cone angle of the light beam. Therefore, the effect of limiting the NA is achieved, system stray light caused by mismatch of the NA is avoided, scattering also exists in the first diaphragm 31, if the first diaphragm is not limited, the stray light level of the system is high, the second diaphragm 32 is arranged to further limit the stray light of the system, and the low stray light level of the whole system is achieved.
As known from the optical principle, a grating is an optical element that disperses light (decomposes into spectra) by using the principle of multi-slit diffraction, and is a flat glass or metal sheet on which a large number of parallel equal-width and equal-distance slits (grooves) are formed. The monochromatic parallel light forms a pattern with wide dark fringes and fine bright fringes through diffraction of each slit of the grating and interference among the slits, the sharp bright fringes are called spectral lines, the positions of the spectral lines are different according to the wavelength, and when the polychromatic light passes through the grating, the spectral lines with different wavelengths appear at different positions to form a spectrum.
according to the grating equation d (sin α ± sin β) ═ m λ, the gratings with different spectral orders m have different diffraction efficiencies for light with different wavelengths λ, in the embodiment, the principle is utilized, the spliced grating assembly 5 comprises a first grating 51 capable of efficiently diffracting ultraviolet and visible light bands and a second grating 52 capable of efficiently diffracting visible light and infrared light bands, the first grating 51 and the second grating 52 are spliced, collimated light simultaneously passes through the first grating 51 and the second grating 52, the spectral orders m of the first grating 51 are set to have very high diffraction efficiencies for ultraviolet and visible bands, the spectral orders m of the second grating 52 are set to have very high diffraction efficiencies for visible bands and infrared bands, and after the two gratings are spliced, the whole dispersion system has higher diffraction efficiencies for ultraviolet, visible bands and infrared bands.
Specifically, the spliced grating assembly 5 is arranged on the grating adjusting seat 53, the grating adjusting seat 53 can rotate on the box body 1, and the angle of the spliced grating assembly 5 relative to incident light can be adjusted.
Referring to fig. 2, the filtering component 7 is a three-level optical filter, the three-level optical filter includes a first filtering region 71, a second filtering region 72, and a third filtering region 73, which are sequentially disposed, the first filtering region 71 is not coated with a film, so as to ensure a high transmittance in a deep ultraviolet band, a perspective band of the first filtering region 71 is 200nm to 385nm, the second filtering region 72 is coated with a film, the region is a 350nm long-pass filter, wherein a transmittance of 350nm to 750nm is higher than 95%, a detection band of the corresponding detection component 8 is 386 nm to 620nm, the third filtering region 73 is a 590nm long-pass filter, and a detection band of the corresponding detection component 8 is 621 nm to 1100 nm.
Referring to fig. 3, in order to meet the requirements of different users, the present application provides a novel overall replacement structure for a slit assembly 2, where the slit assembly 2 includes a mounting seat 21, a fixing flange 22 and a slit 23, the slit 23 is disposed in the middle of the fixing flange 22, the fixing flange 22 is fixed on the mounting seat 21 by bolts, slits 23 of different specifications may be disposed in the middle of different fixing flanges 22, and when the slit 23 needs to be replaced to achieve high resolution or high sensitivity, the fixing flange 22 may be directly detached to achieve quick replacement.
Specifically, in the inside of box body 1, collimation subassembly 4 and focusing assembly 6 are fixed to be set up, prevent to move in the use cluster, collimation subassembly 4 is including fixing collimation fixing base 41 in the box body 1 and the collimating mirror 42 of setting on collimation fixing base 41, focusing assembly 6 is including fixing focus fixing base 61 in the box body 1 and the focusing mirror 62 of setting on focus fixing base 61.
In particular, the detection assembly 8 is a CCD detector.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (9)
1. The utility model provides a miniature fiber optic spectrometer, includes the box body, its characterized in that, be provided with the slit subassembly that supplies the incident light to pass through on the box body, be provided with two diaphragm subassemblies, collimation subassembly, concatenation grating subassembly, focus subassembly, filtering component and detecting component in the box body, the incident light is followed penetrate into in the slit subassembly, restrain stray light through two diaphragm subassemblies, later with the angle of settlement incide and obtain collimated light on the collimation subassembly, collimated light obtains the diffraction light through concatenation grating subassembly, wherein, concatenation grating subassembly is formed by the concatenation of polylith grating, and different gratings can improve the diffraction efficiency of collimated light different wave bands, focuses on the detecting component who is provided with filtering component with the diffraction light by focusing component at last, filtering component can filter the second grade diffraction light.
2. The micro fiber optic spectrometer of claim 1, wherein the dual stop assembly comprises a first stop and a second stop arranged in sequence, the first stop being capable of limiting the NA of the optical system to avoid stray light of the system due to mismatch of NA, the second stop being capable of limiting stray light generated by the first stop.
3. The miniature fiber optic spectrometer of claim 1, wherein the tiled grating assembly comprises a first grating capable of efficiently diffracting in the ultraviolet and visible bands and a second grating capable of efficiently diffracting in the visible and infrared bands in a tiled arrangement.
4. The micro fiber optic spectrometer of claim 2, wherein the split grating assembly is disposed on a grating adjustment mount, the grating adjustment mount being rotatable on the housing to adjust an angle of the split grating assembly relative to the incident light.
5. The micro fiber spectrometer of claim 1, wherein the filter assembly is a three-level filter, the three-level filter comprises a first filter region, a second filter region and a third filter region sequentially arranged, the first filter region has a transmission wavelength band of 200nm to 385nm, the second filter region is a 350nm long-pass filter, and the third filter region is a 590nm long-pass filter.
6. The micro fiber optic spectrometer of claim 1, wherein the slit assembly comprises a mounting block, a mounting flange, and a slit, the slit being disposed in the middle of the mounting flange, the mounting flange being secured to the mounting block by bolts.
7. The micro fiber optic spectrometer of claim 1, wherein the collimating assembly comprises a collimating holder fixed within the housing and a collimating mirror disposed on the collimating holder.
8. The micro fiber optic spectrometer of claim 1, wherein the focusing assembly comprises a focusing holder fixed within the housing and a focusing mirror disposed on the focusing holder.
9. The miniature fiber optic spectrometer of claim 1, wherein the detection assembly is a CCD detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813697.9U CN210571024U (en) | 2019-10-25 | 2019-10-25 | Miniature optical fiber spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813697.9U CN210571024U (en) | 2019-10-25 | 2019-10-25 | Miniature optical fiber spectrometer |
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| Publication Number | Publication Date |
|---|---|
| CN210571024U true CN210571024U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921813697.9U Expired - Fee Related CN210571024U (en) | 2019-10-25 | 2019-10-25 | Miniature optical fiber spectrometer |
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| CN (1) | CN210571024U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218867A (en) * | 2021-05-17 | 2021-08-06 | 燕山大学 | Fixed bed frame of red tide algae recognition device |
-
2019
- 2019-10-25 CN CN201921813697.9U patent/CN210571024U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218867A (en) * | 2021-05-17 | 2021-08-06 | 燕山大学 | Fixed bed frame of red tide algae recognition device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230626 Address after: 215000 floor 3, plant 1, No. 66, Shunxing Road, Lujia Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Suzhou DIYing Digital Medical Technology Co.,Ltd. Address before: Room 1039-417, Cailian Road, Yuanhe street, Xiangcheng District, Suzhou City, Jiangsu Province 215000 Patentee before: SUZHOU CHAOGUANG PHOTOELECTRIC Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200519 |