Portable spectrometer

Abstract

The utility model provides a portable spectrometer comprising a housing, two sides of the interior of the housing are respectively provided with a cavity for part installation and a mainboard installation cavity, the housing at two sides of the cavity is respectively fixedly connected with an outer cover plate and an inner cover plate through screws, the surface of the inner cover plate is provided with a grating adjusting mechanism, and the grating adjusting mechanism is fixedly connected with the mainboard installation cavity. And the grating adjusting mechanism is positioned in the cavity. The large extinction light chamber is arranged at the position where the light passes through and used for eliminating initial stray light, the light is reflected to the grating position after passing through the collimating mirror, the stray light irradiating at the bottom of the cavity is eliminated through the extinction structure, later data collection is prevented from being interfered, and finally the light is not influenced before the light reaches the CMOS sensor. The light angle is adjusted through the grating adjusting mechanism, excessive light or stray light generated due to the fact that the light is too wide due to position debugging is eliminated, meanwhile, the light after light splitting can be accurately shot in according to the size of a CMOS light receiving face more accurately by referring to the imaging position, and collected data are more stable and reliable.

Description

Technical Field

[0001] The utility model relates to a portable spectrometer, belonging to the technical field of spectrometers. Background Art

[0002] A spectrometer is a scientific instrument that decomposes complex light into spectral lines and is composed of a prism, a diffraction grating, etc. This kind of instrument is widely used in many fields, including agriculture, astronomy, automotive, biology, chemistry, coatings, colorimetry, environmental monitoring, film industry, food, printing, papermaking, Raman spectroscopy, semiconductor industry, component detection, color mixing and matching, biomedical applications, fluorescence measurement, gemstone component detection, etc. The spectrometer uses some components and optical systems to separate light radiation by wavelength and receives light radiation of different wavelengths with appropriate receivers. By capturing the light information by the spectrometer, developing it on a photographic film, or displaying and analyzing it with a computerized automatic display numerical instrument, it can be known what elements are contained in an item. Using the element characteristic wavelength information obtained by the spectrometer, it can be qualitatively judged whether the element is contained in the sample; the content of the element can be quantitatively calculated through the intensity of the element characteristic spectral line.

[0003] Existing spectrometers all use a long-focus cross-asymmetric spectroscopic system. There are a variety of extinction structures missing in the optical path of this system, and stray light is likely to be generated during the refraction process of light in this structure. Existing spectrometers tend to be miniaturized and portable, resulting in a complex structure of the spectrometer, requiring a more delicate structure layout, and when detecting, the light imaging is easily affected by stray light, and it is not easy to eliminate the stray light or excessive light generated by the light width caused by the debugging position. Summary of the Utility Model

[0004] The utility model provides a portable spectrometer to solve the technical problem of inconvenient use of spectrometers.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a portable spectrometer, including:

[0007] A housing, on both sides inside the housing, a cavity for installing components and a main board installation cavity are respectively formed. The housing on both sides of the cavity is fixedly connected to an outer cover plate and an inner cover plate by screws respectively. A grating adjustment mechanism is provided on the surface of the inner cover plate, and the grating adjustment mechanism is located inside the cavity; a through hole communicating with the cavity is opened at the top of the housing, and a probe is threadedly connected inside the through hole.

[0008] In this technical solution, an imaging mirror installation area, a collimating mirror installation area, an extinction light chamber, and a grating installation cavity are respectively formed inside the cavity. The grating installation cavity is a semi-circular structure, and a grating adjustment mechanism is fitted and inserted inside the grating installation cavity.

[0009] In the technical solution, a power supply installation cavity and a switch installation cavity corresponding to each other are respectively provided in the middle of one side of the shell, and a button switch is embedded and installed inside the switch installation cavity.

[0010] In the technical solution, a CMOS installation cavity and a cosine correction piece installation cavity are respectively provided inside the shell, and the CMOS installation cavity and the cosine correction piece installation cavity are respectively located on two adjacent sides of the cavity, and the cosine correction piece installation cavity is correspondingly arranged on one side of the through hole.

[0011] In the technical solution, a slit pressing block is inserted and engaged inside the through hole, a prism is arranged above the slit pressing block, and both the slit pressing block and the prism are located inside the probe.

[0012] In the technical solution, an inclined collimator mirror installation area and an imaging mirror installation area are provided inside the shell, the collimator mirror installation area is correspondingly arranged below the through hole, and an extinction chamber composed of multiple grooves is provided on one side of the collimator mirror installation area.

[0013] In the technical solution, a plurality of circularly distributed arc grooves are provided on the surface of the inner cover plate, and the arc grooves are distributed corresponding to the grating installation cavity.

[0014] In the present technical solution, the grating adjustment mechanism includes a carrier and a glass slide, the edge of the carrier is threadedly connected with an adjustment knob, the adjustment knob is rotatably connected to the inside of the glass slide, a guide block is fixedly connected to the bottom of the glass slide, the glass slide is located inside the carrier, a guide groove is opened on the inner wall of the carrier, and the guide block is slidably connected to the inside of the guide groove.

[0015] In the present technical solution, the cross-section of the carrier is an L-shaped structure and is fixedly connected to the end head, the end head is engaged with the circular hole on the inner cover plate, the end head is located between the arc grooves, the edge of the carrier is threadedly connected to the fastening knob, and the fastening knob and the adjusting knob are both slidably connected to the inside of the arc groove.

[0016] In the technical solution, the cross section of the glass slide is an L-shaped structure, and a tilted reflector is fixedly connected inside the glass slide, and the reflector is distributed correspondingly to the imaging mirror.

[0017] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0018] The positive and progressive effects of the utility model are:

[0019] The portable spectrometer proposed above uses a housing as the main body of the spectrometer, which has the advantages of compact structure, light weight and portability. A large extinction light chamber is set at the position where the light passes to eliminate initial stray light. After the light passes through the collimating mirror, it is reflected to the grating position. By setting an extinction structure, the stray light irradiating on the bottom of the cavity is eliminated to avoid interfering with the later data acquisition. Finally, before the light reaches the CMOS sensor, the light angle is adjusted through the grating adjustment mechanism to eliminate excessive light or stray light caused by the too wide light due to the debugging position. At the same time, the reference imaging position makes the split light more accurately enter according to the size of the CMOS light-receiving surface. Under this spectroscopic system, the collected data is more stable and reliable, and there is no need to manually correct the deviation through software means, making the data more real. Description of the Drawings

[0020] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model.

[0021] Figure 2 It is a schematic three-dimensional structure diagram at the inner cover plate of the present utility model.

[0022] Figure 3 It is a schematic three-dimensional structure diagram at the cavity of the present utility model.

[0023] Figure 4 It is a schematic side view structure diagram at the grating adjustment mechanism of the present utility model.

[0024] Figure 5 It is a schematic three-dimensional structure diagram at the grating adjustment mechanism of the present utility model.

[0025] Description of the Reference Numerals

[0026] 1. Housing; 2. Cavity; 3. Outer cover plate; 4. Main board installation cavity; 5. Power supply installation cavity; 6. Switch installation cavity; 7. Push-button switch; 8. CMOS installation cavity; 9. Cosine correction piece installation cavity; 10. Through hole; 101. Probe; 11. Grating installation cavity; 12. Collimating mirror installation area; 13. Imaging mirror installation area; 14. Extinction light chamber; 15. Inner cover plate; 16. Arc groove; 17. Grating adjustment mechanism; 171. Carrier; 172. End; 173. Tightening knob; 174. Adjusting knob; 175. Slide glass; 176. Reflecting mirror; 177. Guide block; 178. Guide groove. Detailed Embodiment

[0027] The present utility model will be further described below by way of embodiments, but the present utility model is not limited to the scope of the described embodiments.

[0028] As Figures 1-5 shown, the portable spectrometer includes:

[0029] A housing 1, on both sides inside the housing 1, a cavity 2 for component installation and a main board installation cavity 4 are respectively formed. The housing 1 on both sides of the cavity 2 is fixedly connected to an outer cover plate 3 and an inner cover plate 15 by screws respectively. A grating adjustment mechanism 17 is provided on the surface of the inner cover plate 15, and the grating adjustment mechanism 17 is located inside the cavity 2; a through hole 10 communicating with the cavity 2 is opened at the top of the housing 1, and a probe 101 is threadedly connected inside the through hole 10.

[0030] An imaging lens installation area 13, a collimating lens installation area 12, an extinction light chamber 14 and a grating installation cavity 11 are respectively formed inside the cavity 2. The grating installation cavity 11 is of a semi-circular structure, and a grating adjustment mechanism 17 is fitted and inserted inside the grating installation cavity 11.

[0031] A power supply installation cavity 5 and a switch installation cavity 6 corresponding to each other are respectively provided in the middle of one side of the housing 1, and a push-button switch 7 is fitted and installed inside the switch installation cavity 6.

[0032] A CMOS installation cavity 8 and a cosine correction film installation cavity 9 are respectively provided inside the housing 1. The CMOS installation cavity 8 and the cosine correction film installation cavity 9 are respectively located on the adjacent sides of the cavity 2, and the cosine correction film installation cavity 9 is correspondingly arranged on one side of the through hole 10.

[0033] A slit pressing block is fitted and inserted inside the through hole 10, a prism is provided above the slit pressing block, and both the slit pressing block and the prism are located inside the probe 101.

[0034] The collimating lens installation area 12 and the imaging lens installation area 13 which are inclinedly distributed are provided inside the housing 1. The collimating lens installation area 12 is correspondingly arranged below the through hole 10, and an extinction light chamber 14 composed of a plurality of grooves is provided on one side of the collimating lens installation area 12.

[0035] In this technical solution, during assembly, the slit pressing block and the prism are respectively inserted into the through hole 10, and then the probe 101 is tightened so that the slit pressing block and the prism are located inside the probe 101. Light enters through the fine holes at the probe 101. The light enters the cavity 2 through the through hole 10, is refracted by the collimating lens in the collimating lens installation area 12 to the reflector 176, so that the light is reflected to the imaging lens in the imaging lens installation area 13, and the light is reflected and irradiated on the CMOS sensor in the CMOS safety cavity. At the same time, the extinction light chamber 14 eliminates the excess scattered light.

[0036] A plurality of arc grooves 16 distributed in a circular shape are opened on the surface of the inner cover plate 15, and the arc grooves 16 are correspondingly distributed with the grating installation cavity 11.

[0037] In this technical solution, the outer cover plate 3 and the inner cover plate 15 are used to achieve the installation with the housing 1, so that the cavity 2 forms a closed space. At the same time, the inner cover plate 15 can be used for the installation of the grating adjustment mechanism 17. By adjusting the carrier 171 at the arc groove 16, the convenience during debugging is improved.

[0038] The grating adjustment mechanism 17 includes a carrier 171 and a glass slide 175. A adjusting knob 174 is threadedly connected to the edge of the carrier 171. The adjusting knob 174 is rotatably connected to the inside of the glass slide 175. A guide block 177 is fixedly connected to the bottom of the glass slide 175. The glass slide 175 is located inside the carrier 171. A guide groove 178 is formed in the inner wall of the carrier 171, and the guide block 177 is slidably connected to the inside of the guide groove 178.

[0039] The cross-section of the carrier 171 is an L-shaped structure and is fixedly connected to the end 172. The end 172 is fitted and inserted into the round hole on the inner cover plate 15. The end 172 is located between the arc grooves 16. The edge of the carrier 171 is threadedly connected to the fastening knob 173, and both the fastening knob 173 and the adjusting knob 174 are slidably connected to the inside of the arc groove 16.

[0040] The cross-section of the glass slide 175 is an L-shaped structure. An inclined mirror 176 is fixedly connected to the inside of the glass slide 175, and the mirror 176 and the imaging lens are correspondingly distributed.

[0041] In this technical solution, the end 172 is fitted on the inner cover plate 15, and then the fastening knob 173 and the adjusting knob 174 are passed through the arc groove 16. The fastening knob 173 is tightened on the carrier 171, and the adjusting knob 174 is inserted into the inside of the carrier 171. During adjustment, a tool is used to rotate the end 172. The end 172 drives the carrier 171 to rotate. When the carrier 171 rotates, it drives the fastening knob 173 and the adjusting knob 174 to always slide inside the arc groove 16, thereby adjusting the horizontal angle of the mirror 176. By rotating the adjusting knob 174, when the adjusting knob 174 rotates and vertically moves on the carrier 171, it drives the glass slide 175 to move, and stable movement is achieved through the cooperation of the guide block 177 and the guide groove 178, adjusting the vertical position of the mirror 176 for the debugging of light refraction.

[0042] The present utility model is not limited to the above embodiments. No matter any changes are made in its shape or structure, they all fall within the protection scope of the present utility model. The protection scope of the present utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. A portable spectrometer, characterized in that include: A shell (1), wherein a cavity (2) for installing components and a mainboard installation cavity (4) are respectively formed on both sides of the shell (1), and the shell (1) located on both sides of the cavity (2) are fixedly connected to an outer cover plate (3) and an inner cover plate (15) by screws, respectively, and a grating adjustment mechanism (17) is provided on the surface of the inner cover plate (15), and the grating adjustment mechanism (17) is located inside the cavity (2); a through hole (10) communicating with the cavity (2) is opened on the top of the shell (1), and a probe (101) is threadedly connected inside the through hole (10).

2. The portable spectrometer according to claim 1, characterized in that: An imaging mirror installation area (13), a collimating mirror installation area (12), an extinction chamber (14) and a grating installation cavity (11) are respectively formed inside the cavity (2); the grating installation cavity (11) is a semicircular structure, and a grating adjustment mechanism (17) is inserted and engaged inside the grating installation cavity (11).

3. The portable spectrometer according to claim 1, characterized in that: A power supply installation cavity (5) and a switch installation cavity (6) corresponding to each other are respectively provided in the middle of one side of the housing (1), and a button switch (7) is embedded and installed inside the switch installation cavity (6).

4. The portable spectrometer according to claim 1, characterized in that: A CMOS installation cavity (8) and a cosine correction piece installation cavity (9) are respectively arranged inside the shell (1); the CMOS installation cavity (8) and the cosine correction piece installation cavity (9) are respectively located on two adjacent sides of the cavity (2); and the cosine correction piece installation cavity (9) is correspondingly arranged on one side of the through hole (10).

5. The portable spectrometer according to claim 1, characterized in that: A slit pressing block is inserted and engaged inside the through hole (10), a prism is arranged above the slit pressing block, and both the slit pressing block and the prism are located inside the probe (101).

6. The portable spectrometer according to claim 1, characterized in that: The housing (1) is provided with an inclined collimator mirror installation area (12) and an imaging mirror installation area (13), the collimator mirror installation area (12) being arranged correspondingly below the through hole (10), and a light extinction chamber (14) composed of a plurality of grooves being provided on one side of the collimator mirror installation area (12).

7. The portable spectrometer according to claim 1, characterized in that: A plurality of circularly distributed arc grooves (16) are provided on the surface of the inner cover plate (15), and the arc grooves (16) are distributed corresponding to the grating installation cavity (11).

8. The portable spectrometer according to claim 1, characterized in that: The grating adjustment mechanism (17) comprises a carrier (171) and a glass slide (175); an adjustment knob (174) is threadedly connected to the edge of the carrier (171); the adjustment knob (174) is rotatably connected to the inside of the glass slide (175); a guide block (177) is fixedly connected to the bottom of the glass slide (175); the glass slide (175) is located inside the carrier (171); a guide groove (178) is provided on the inner wall of the carrier (171); and the guide block (177) is slidably connected to the inside of the guide groove (178).

9. The portable spectrometer according to claim 8, characterized in that: The carrier (171) has an L-shaped cross-section and is fixedly connected to the end head (172); the end head (172) is inserted into a circular hole on the inner cover plate (15); the end head (172) is located between the arc grooves (16); the edge of the carrier (171) is threadedly connected to the tightening knob (173); and the tightening knob (173) and the adjusting knob (174) are both slidably connected to the inside of the arc groove (16).

10. The portable spectrometer according to claim 8, characterized in that: The cross section of the glass slide (175) is an L-shaped structure, and a tilted reflector (176) is fixedly connected inside the glass slide (175), and the reflector (176) is distributed correspondingly to the imaging mirror.

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