Optical fiber spectrometer slit alignment device

Abstract

The utility model relates to a kind of slit alignment devices of optical fiber spectrometer, install on spectrometer shell and be located at its entrance slit, for realizing the butt joint of optical fiber bundle and slit, the alignment device includes: optical fiber positioning sleeve, the optical fiber positioning sleeve is hollow columnar structure, its inside is formed for accommodating the accommodating cavity of the optical fiber bundle;The optical fiber positioning sleeve has the first side and third side opposite to each other, the first side is configured as with the length direction parallel of the entrance slit;The present application provides a kind of in-situ fine adjustment and locking mechanism by adjusting member and fastener integrated on optical fiber positioning sleeve, user can be in the process of optical fiber bundle installation and use, by operating adjusting member, the precise lateral position adjustment of optical fiber bundle is carried out, by screwing fastener, the reliable locking of optical fiber bundle is carried out, to solve the problem that optical fiber bundle cannot compensate alignment deviation due to fixed installation.

Description

Technical Field

[0001] This utility model relates to the field of spectrometer technology, and specifically to a slit alignment device for a fiber optic spectrometer. Background Technology

[0002] As a precision spectral analysis device, the alignment accuracy between the entrance slit and the fiber optic bundle that introduces the light signal directly determines the measurement accuracy of the spectrometer. In the existing technology, the fiber optic bundle is usually installed at the front end of the slit through a fixed connector or positioning sleeve. Once the installation is completed, the position of the fiber optic bundle is fixed and cannot be adjusted again.

[0003] However, during actual assembly or use, due to factors such as mechanical stress, temperature changes, or vibration, the fiber bundle may experience slight, unavoidable displacement, causing the alignment of its fiber core with the slit to deviate from the optimal position. Since existing devices lack online fine-tuning capabilities, this slight misalignment will directly lead to light flux loss and signal quality degradation, seriously affecting the long-term stability and measurement accuracy of the spectrometer. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a slit alignment device for a fiber optic spectrometer, which solves the problem that the fiber bundle cannot be finely adjusted in situ after being fixedly installed in the existing fiber optic spectrometer, making it difficult to compensate for alignment deviations.

[0005] To achieve the above objectives, this utility model provides a slit alignment device for a fiber optic spectrometer, which is installed on the spectrometer housing and located at its entrance slit, for aligning the fiber bundle with the slit. The alignment device includes: The fiber positioning sleeve is a hollow cylindrical structure with an internal cavity for accommodating the fiber bundle. The fiber positioning sleeve has a first side and a third side opposite to each other, the first side being configured to be parallel to the length direction of the inlet slit; At least one adjusting member is provided on the first side along the length direction perpendicular to the entrance slit, and its inner end can abut against the optical fiber bundle in the accommodating cavity to fine adjust the position of the optical fiber bundle in the length direction perpendicular to the slit. At least one fastener is inserted into the optical fiber positioning sleeve and its insertion direction intersects with the insertion direction of the adjusting member. Its inner end can abut against the optical fiber bundle in the accommodating cavity to lock the finely adjusted optical fiber bundle.

[0006] By adopting this technical solution, adjusting components and fasteners with intersecting directions are set on the same fiber positioning sleeve, so that the fiber bundle can still be precisely adjusted in lateral position after installation and can be reliably locked after adjustment. This fundamentally solves the technical problem that the alignment deviation cannot be corrected in situ after the fiber bundle is fixedly installed, and significantly improves the maintainability and long-term alignment accuracy of the spectrometer.

[0007] Furthermore, the fiber positioning sleeve has a columnar structure with a rectangular cross-section and includes a first side, a second side, a third side, and a fourth side that are sequentially adjacent to each other along the circumference. The first side is parallel to the third side, the second side is parallel to the fourth side, and the second side is perpendicular to the first side.

[0008] By adopting this technical solution, a stable and regular mechanical carrier is provided, which enables the precise definition and control of the action direction of the adjusting parts and fasteners, ensuring the linearity and predictability of the adjusting action and reducing the complexity of assembly and adjustment.

[0009] Furthermore, the fiber optic positioning sleeve also includes an inclined surface located between the second side and the third side, the inclined surface replacing the right-angle connection portion of the rectangular cross-section between the second side and the third side, and the fastener passing through the inclined surface.

[0010] By adopting this technical solution, the inclined structure makes the direction of the fastener's locking force form a spatial angle with the direction of the adjusting force of the adjusting component. This not only avoids interference from the already completed fine lateral adjustment during the locking operation, but also provides a better anti-vibration locking effect through the inclined clamping, thus enhancing the stability of the device.

[0011] Furthermore, both the adjusting member and the fastener are threaded rods.

[0012] By adopting this technical solution, in addition to reducing the difficulty of adjustment, the threaded rod's threaded drive has the advantages of good self-locking, high adjustment resolution, and simple and reliable operation, making the fine-tuning process smooth and precise, and the locking force can be precisely controlled, which greatly improves the adjustment performance and reliability of the device.

[0013] Furthermore, the number of adjustment members is at least two, and they are spaced apart on the first side along the length direction of the inlet slit.

[0014] By adopting this technical solution, the setting of at least two adjustment components creates at least two independent adjustment points. Through these two independent adjustment points, the operator can not only adjust the translation of the fiber bundle, but also correct any possible minute angular deflections, thus achieving more comprehensive and precise control over the two degrees of freedom of the fiber bundle in the adjustment plane.

[0015] Furthermore, at least two connection holes are provided on the side wall of the fiber optic positioning sleeve for engaging with screws and fixing the fiber optic positioning sleeve to the spectrometer housing using screws.

[0016] By adopting this technical solution, the screw connection ensures a rigid connection between the device and the spectrometer housing, preventing displacement; at the same time, the detachability facilitates the maintenance, replacement, or transfer of the entire alignment device between different instruments, improving the modularity and flexibility of the product.

[0017] Furthermore, at least two of the connection holes include a pair of screw holes located diagonally opposite each other on the fiber optic positioning sleeve.

[0018] By adopting this technical solution, the two-point diagonal fixing method ensures sufficient connection rigidity while allowing a small self-alignment margin during installation of the fiber optic positioning sleeve. It also prevents sleeve distortion that may be caused by unilateral force, making the installation process simpler and the final positioning more accurate.

[0019] Furthermore, the size of the accommodating cavity is configured to be slightly larger than the cross-sectional size of the fiber bundle to form an alignment gap between them for fine-tuning.

[0020] By adopting this technical solution, the alignment gap is a prerequisite for realizing the fine-tuning function. It allows the fiber bundle to move within the cavity under the push of the adjustment component. At the same time, the gap size is designed to ensure a sufficient adjustment range without causing difficulties in the initial positioning of the fiber bundle and wobbling problems due to excessive gap.

[0021] Compared with the prior art, this utility model has the following advantages: By integrating adjustment components and fasteners onto the fiber optic positioning sleeve, a convenient in-situ fine-tuning and locking mechanism is provided. During the installation and use of the fiber optic bundle, users can make precise lateral position adjustments to the fiber optic bundle by operating the adjustment components and reliably lock the fiber optic bundle by tightening the fasteners. This solves the problem that the fiber optic bundle cannot compensate for alignment deviations due to fixed installation, and significantly improves the assembly tolerance, long-term alignment stability and overall measurement performance of the spectrometer. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the slit alignment device for a fiber optic spectrometer according to the present invention; Figure 2 This is a front view schematic diagram of the slit alignment device for a fiber optic spectrometer according to this utility model; Figure 3 This is an exploded three-dimensional schematic diagram of the slit alignment device for a fiber optic spectrometer according to the present invention. Figure 4This is a schematic diagram of the installation of the slit alignment device for the fiber optic spectrometer of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 100, spectrometer housing; 200, fiber bundle; 1, fiber positioning sleeve; 11, accommodating cavity; 12, first side; 13, second side; 14, third side; 15, fourth side; 16, inclined surface; 2, screw hole; 3, adjusting component; 4, fastener. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to the appendix. Figure 1-4 This utility model provides a slit alignment device for a fiber optic spectrometer, which is installed on the spectrometer housing 100 and located at its entrance slit. It is used to align the fiber optic bundle 200 with the slit. The alignment device includes: a fiber optic positioning sleeve 1, which is a hollow cylindrical structure with an internal cavity 11 for accommodating the fiber optic bundle 200; the fiber optic positioning sleeve 1 has a first side 12 and a third side 14 facing each other, the first side 12 being configured to be parallel to the length direction of the entrance slit; at least one adjusting member 3, which passes through the first side 12 along the length direction perpendicular to the entrance slit, and whose inner end can abut against the fiber optic bundle 200 in the cavity 11 to fine-tune the position of the fiber optic bundle 200 in the length direction perpendicular to the slit; and at least one fastener 4, which passes through the fiber optic positioning sleeve 1 and whose passing direction intersects with the passing direction of the adjusting member 3, and whose inner end can abut against the fiber optic bundle 200 in the cavity 11 to lock the finely adjusted fiber optic bundle 200.

[0026] By setting intersecting adjustment components 3 and fasteners 4 on the same fiber positioning sleeve 1, the fiber bundle 200 can still be precisely adjusted in lateral position after installation and can be reliably locked after adjustment. This fundamentally solves the technical problem that the alignment deviation cannot be corrected in situ after the fiber bundle is fixedly installed, and significantly improves the maintainability and long-term alignment accuracy of the spectrometer. Please refer to the appendix. Figure 2 The fiber optic positioning sleeve 1 has a columnar structure with a rectangular cross-section and includes a first side 12, a second side 13, a third side 14 and a fourth side 15 that are sequentially adjacent to each other along the circumference; wherein, the first side 12 and the third side 14 are parallel to each other, the second side 13 and the fourth side 15 are parallel to each other, and the second side 13 is perpendicular to the first side 12.

[0027] It provides a stable and regular mechanical carrier, which enables the precise definition and control of the action direction of the adjusting component 3 and the fastener 4, ensuring the linearity and predictability of the adjustment action and reducing the complexity of assembly and adjustment.

[0028] Furthermore, the fiber optic positioning sleeve 1 also includes an inclined surface 16 located between the second side 13 and the third side 14. The inclined surface 16 replaces the right-angle connection portion of the rectangular cross-section between the second side 13 and the third side 14, and the fastener 4 passes through the inclined surface 16.

[0029] The inclined plane 16 structure makes the locking force direction of the fastener 4 and the adjustment force direction of the adjusting member 3 form a spatial angle. This not only avoids the locking operation from interfering with the completed fine lateral adjustment, but also provides a better anti-vibration locking effect through the inclined clamping, thus enhancing the stability of the device. Please refer to the appendix. Figure 3 Both the adjusting component 3 and the fastener 4 are threaded rods. In addition to reducing the difficulty of adjustment, the threaded drive of the threaded rod has the advantages of good self-locking, high adjustment resolution, and simple and reliable operation, making the fine-tuning process smooth and precise, and the locking force can be precisely controlled, which greatly improves the adjustment performance and reliability of the device.

[0030] Furthermore, the number of adjustment components 3 is at least two, which are spaced apart on the first side surface 12 along the length of the entrance slit. The arrangement of at least two adjustment components 3 creates at least two independent adjustment points. Through these two independent adjustment points, the operator can not only adjust the translation of the fiber bundle 200, but also correct any possible minute angular deflections, thus achieving more comprehensive and precise control over the two degrees of freedom of the fiber bundle 200 in the adjustment plane. Please refer to the appendix. Figure 1-2 The fiber optic positioning sleeve 1 has at least two connection holes on its side wall for engaging with screws to fix it to the spectrometer housing 100. The screw connection ensures a rigid connection between the device and the spectrometer housing 100, preventing displacement; at the same time, the detachability facilitates the maintenance, replacement, or transfer of the entire alignment device between different instruments, improving the modularity and flexibility of the product.

[0031] Furthermore, at least two connection holes include a pair of screw holes 2 located diagonally opposite each other on the fiber optic positioning sleeve 1. This two-point diagonal fixing method ensures sufficient connection rigidity while allowing for a slight self-alignment margin during installation of the fiber optic positioning sleeve 1, and prevents sleeve distortion that may be caused by unilateral force, making the installation process simpler and the final positioning more accurate. Please refer to the appendix. Figure 2-3 The size of the accommodating cavity 11 is configured to be slightly larger than the cross-sectional size of the fiber bundle 200, so as to form an alignment gap between them for fine-tuning. The alignment gap is a prerequisite for realizing the fine-tuning function. It allows the fiber bundle 200 to move within the cavity under the push of the adjustment element 3. At the same time, the size of the gap is designed to ensure a sufficient adjustment range without causing difficulties in the initial positioning of the fiber bundle 200 and wobbling problems due to an excessively large gap. The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A slit alignment device for a fiber optic spectrometer, mounted on the spectrometer housing and located at its entrance slit, for aligning the fiber bundle with the slit, characterized in that, The alignment device includes: Fiber optic positioning sleeve, wherein the fiber optic positioning sleeve is a hollow cylindrical structure, and an accommodating cavity is formed inside for accommodating the fiber bundle; The fiber positioning sleeve has a first side and a third side opposite to each other, the first side being configured to be parallel to the length direction of the inlet slit; At least one adjusting member is provided on the first side along the length direction perpendicular to the entrance slit, and its inner end can abut against the optical fiber bundle in the accommodating cavity to fine adjust the position of the optical fiber bundle in the length direction perpendicular to the slit. At least one fastener is inserted into the optical fiber positioning sleeve and its insertion direction intersects with the insertion direction of the adjusting member. Its inner end can abut against the optical fiber bundle in the accommodating cavity to lock the finely adjusted optical fiber bundle.

2. The slit alignment device for a fiber optic spectrometer according to claim 1, characterized in that: The fiber positioning sleeve has a columnar structure with a rectangular cross-section and includes a first side, a second side, a third side, and a fourth side that are sequentially adjacent to each other along the circumference. The first side is parallel to the third side, the second side is parallel to the fourth side, and the second side is perpendicular to the first side.

3. The slit alignment device for a fiber optic spectrometer according to claim 2, characterized in that: The fiber optic positioning sleeve also includes an inclined surface located between the second side and the third side, the inclined surface replacing the right-angle connection portion of the rectangular cross-section between the second side and the third side, and the fastener passing through the inclined surface.

4. The slit alignment device for a fiber optic spectrometer according to claim 1 or 2, characterized in that: Both the adjusting component and the fastener are threaded rods.

5. The slit alignment device for a fiber optic spectrometer according to claim 1, characterized in that: The number of adjustment components is at least two, and they are spaced apart on the first side along the length of the inlet slit.

6. The slit alignment device for a fiber optic spectrometer according to claim 1, characterized in that: The fiber optic positioning sleeve has at least two connection holes on its side wall for engaging with screws and fixing the fiber optic positioning sleeve to the spectrometer housing with screws.

7. The slit alignment device for a fiber optic spectrometer according to claim 6, characterized in that: At least two of the connection holes include a pair of screw holes located diagonally opposite the fiber positioning sleeve.

8. The slit alignment device for a fiber optic spectrometer according to claim 1, characterized in that: The size of the accommodating cavity is configured to be slightly larger than the cross-sectional size of the fiber bundle to form an alignment gap between them for fine-tuning.

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