Device for generating multiple parallel collimated light beams and optical measurement system
By combining a light source, a coupling mirror group, an optical fiber, a collimating mirror group, and an aperture stop, the problem of complex structure in existing devices is solved, and the generation of multiple parallel collimated beams is realized, simplifying the structure and improving measurement accuracy and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHUNYI TECHNOLOGY (SHANDONG) CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-01
AI Technical Summary
Existing devices for generating multiple parallel beams are complex in structure and cannot meet the requirements for multiple parallel beams in optical measurements.
The system employs a combination structure of a light source, a coupling mirror group, an optical fiber, a collimating mirror group, and an aperture stop. The coupling mirror group enables fine beam shaping, and the system utilizes optical fiber for transmission and collimates multiple parallel collimated beams through the collimating mirror group and the aperture stop.
It enables the generation of multiple parallel collimated beams, reduces transmission loss, and improves the accuracy and efficiency of measurements, making it suitable for optical measurement systems.
Smart Images
Figure CN224190341U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical technology, and more specifically, to a device and optical measurement system for generating multiple parallel collimated beams. Background Technology
[0002] To obtain good image testing results, different lighting methods are usually selected based on the shape, material, and reflectivity of the object being measured. When measuring the object from all angles, multiple parallel beams are needed to illuminate it, so that the measured dimensions of the object can be obtained based on the geometric relationship between the multiple reflected beams.
[0003] However, existing devices for generating multiple parallel beams have relatively complex structures. Utility Model Content
[0004] This invention provides a device and optical measurement system for generating multiple parallel collimated beams, which can obtain multiple parallel and collimated beams and has a simple structure.
[0005] The embodiments of this utility model can be implemented as follows:
[0006] An embodiment of this utility model provides a device for generating multiple parallel collimated beams, comprising:
[0007] light source;
[0008] A coupling mirror assembly, used to couple the light beam emitted by the light source to obtain a coupled light beam;
[0009] Optical fiber, used to transmit the coupled beam;
[0010] A collimating lens group is disposed at the output end of the optical fiber;
[0011] An aperture stop is provided, wherein multiple small holes are provided on the aperture stop; the aperture stop is provided on the output light path of the collimating lens group, and is used to output multiple parallel and collimated light beams.
[0012] In an optional embodiment, the number of the small holes is even, and the plurality of small holes are symmetrically arranged around the center of the aperture diaphragm.
[0013] In an optional embodiment, the number of holes is four, with two holes forming a group, and each group of holes is symmetrically arranged along the outgoing light path passing through the center of the aperture.
[0014] In an optional implementation, the included angle between the lines connecting the two sets of holes is a right angle.
[0015] In an optional embodiment, the apparatus for generating multiple parallel collimated beams further includes a detector for detecting whether the multiple beams emitted through the aperture are centrally symmetrical.
[0016] In an optional implementation, the light source is a laser diode.
[0017] In an optional embodiment, the wavelength range of the light beam generated by the laser diode is 400nm to 900nm.
[0018] In an optional embodiment, the collimating lens group includes a meniscus lens and biconvex lenses disposed on both sides of the meniscus lens.
[0019] In an optional implementation, there are multiple light sources, and each light source produces a beam with a different wavelength.
[0020] An embodiment of this utility model also provides an optical measurement system, including the device for generating multiple parallel collimated beams as described in any of the above embodiments.
[0021] The beneficial effects of the apparatus and optical measurement system for generating multiple parallel collimated beams according to embodiments of this utility model include, for example:
[0022] This device for generating multiple parallel collimated beams includes a light source, a coupling mirror group, an optical fiber, a collimating mirror group, and an aperture stop. The coupling mirror group couples the beams emitted from the light source to obtain coupled beams. By setting the coupling mirror group, the beam can be finely shaped to control its size and divergence angle, allowing the coupled beams to better match the optical fiber and be transmitted within it. The optical fiber is used to transmit the coupled beams. Transmission via optical fiber reduces transmission loss, and optical fiber has a wider transmission bandwidth. The collimating mirror group is located at the exit end of the optical fiber. By setting the collimating mirror group, the beam can be converted into a parallel beam, ensuring parallel propagation of the light. The aperture stop has multiple small holes; it is positioned in the exit optical path of the collimating mirror group to emit multiple parallel and collimated beams. Setting an aperture stop in the exit optical path of the collimating mirror group obtains multiple parallel and collimated beams. Furthermore, its overall structure is simple. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1This is a schematic diagram of a device for generating multiple parallel collimated beams provided in an embodiment of the present invention;
[0025] Figure 2 This is a schematic diagram of the aperture stop provided in an embodiment of the present invention.
[0026] Icons: 1000 - Device that generates multiple parallel collimated beams; 100 - Light source; 200 - Coupler lens group; 300 - Optical fiber; 310 - Emitter; 400 - Collimating lens group; 500 - Aperture; 510 - Pinhole; 2000 - Light spot. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0030] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0032] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0033] To achieve good image testing results, different illumination methods are typically selected based on the shape, material, and reflectivity of the object being measured. When performing omnidirectional measurements on the object, multiple parallel beams are needed to illuminate it, allowing the measured dimensions to be obtained based on the geometric relationships between the reflected beams. However, existing devices for generating multiple parallel beams are structurally complex.
[0034] Based on this, please refer to Figure 1 The apparatus 1000 for generating multiple parallel collimated beams provided in the embodiments of this utility model can effectively improve the aforementioned technical problems. This apparatus 1000 can obtain multiple parallel and collimated beams and has a simple structure. The apparatus 1000 can be applied to optical measurement systems; of course, it can also be applied to other optical systems that require multiple parallel beams, which is not limited here. Optical systems equipped with this apparatus all have the same functions as described above, and will not be elaborated further here.
[0035] The optical measurement system in this embodiment includes a device 1000 for generating multiple parallel collimated light beams and a measuring device. The device 1000 emits multiple parallel collimated light beams onto the surface of the object to be measured, illuminating the object. The measuring device receives the reflected light beam signals to achieve comprehensive detection of the object. Of course, the optical measurement system may also include other devices depending on the actual application, and is not limited here.
[0036] Figure 1 This is a schematic diagram of a device 1000 for generating multiple parallel collimated beams provided in an embodiment of the present invention. Figure 1As shown, the device 1000 for generating multiple parallel collimated beams in this embodiment includes a light source 100, a coupling mirror group 200, an optical fiber 300, a collimating mirror group 400, and an aperture stop 500. The coupling mirror group 200 is used to couple the beams emitted by the light source 100 to obtain coupled beams; the optical fiber 300 is used to transmit the coupled beams; the collimating mirror group 400 is disposed at the exit end 310 of the optical fiber 300; the aperture stop 500 has multiple small holes 510; the aperture stop 500 is disposed in the exit optical path of the collimating mirror group 400 to emit multiple parallel and collimated beams. By setting the coupling mirror group 200, the beam can be finely shaped to control the size and divergence angle of the beam, so that the coupled beams can be better matched with the optical fiber 300 and transmitted into the optical fiber 300 for transmission. Transmission through the optical fiber 300 can reduce transmission loss, and the transmission bandwidth of the optical fiber 300 is relatively wide. By setting the collimating lens group, the beam can be converted into a parallel beam to ensure that the light propagates in parallel. The beam emitted from the collimating lens group 400 forms a spot 2000 on the aperture 500. The beam can only exit through the small hole 510 of the aperture 500, thus obtaining multiple parallel and collimated beams. Its overall structure is simple.
[0037] Specifically, the collimating lens group 400 in this embodiment includes a meniscus lens and biconvex lenses disposed on both sides of the meniscus lens. Of course, the collimating lens group 400 may also include an adjustment mechanism, which is used to fine-tune the position and angle of each component of the collimating lens group 400. Since errors may occur during the processing and assembly of optical elements, the adjustment mechanism allows for fine adjustment of the lens group to achieve optimal collimation. For example, the front-to-back position and tilt angle of the lenses can be adjusted to ensure that light can accurately pass through the lens group and be collimated. The structure of the collimating lens group 400 is not limited here and is determined according to actual usage requirements.
[0038] When measuring the radius of curvature of an uneven surface, multiple beams of symmetrical parallel light are typically required. Please refer to [link / reference]. Figure 1 and combined Figure 2 , Figure 2 This is a schematic diagram of the aperture stop 500 provided in an embodiment of the present invention. In this embodiment, the number of apertures 510 is even, and the multiple apertures 510 are symmetrically arranged around the center of the aperture stop 500. By using multiple parallel and symmetrical beams of light, the radius of curvature of the object under test can be measured based on the geometric relationship between the spacing between them and the radius of curvature of the object. Of course, the number of apertures 510 can also be odd, depending on the shape of the actual object under test, and is not limited here.
[0039] Please continue reading. Figure 1 and combined Figure 2In this embodiment, the device 1000 for generating multiple parallel collimated beams is used to measure the radius of curvature of a sphere. To comprehensively cover the sphere, this embodiment uses four small holes 510, arranged in pairs, with each pair symmetrically positioned along the outgoing light path from the center of the aperture 500. Furthermore, to further cover the entire sphere and meet the measurement requirements for the radius of curvature, the angle between the lines connecting the two pairs of small holes 510 is a right angle. Of course, the number of small holes 510 can also be two, three, five, six, or other numbers, depending on the shape of the object being measured, and is not limited here. For example, when measuring the radius of curvature of a cylinder, only two small holes 510 are needed, symmetrically positioned along the center of the aperture 500. Cylindrical measurements only require two symmetrical beams to meet the measurement requirements for the radius of curvature.
[0040] The device 1000 for generating multiple parallel collimated beams in this embodiment further includes a detector (not shown in the figure), which is used to detect whether the multiple beams emitted from the aperture 500 are centrally symmetrical. In this embodiment, the detector is used to receive the light spots of the multiple parallel beams emitted from the aperture 500. By detecting whether the multiple beams emitted from the aperture 500 are centrally symmetrical, it can be determined whether the entire device is aligned with the optical axis of the object under test, thereby improving the accuracy of the measurement.
[0041] In this embodiment, the light source 100 is a laser diode. Laser diodes have excellent directivity and linearity, which allows them to be focused with a very small spot size 2000. Furthermore, laser diodes typically have low power consumption and high overall efficiency. Most laser diodes operate with a voltage drop of less than 2 volts, power requirements are determined by their current settings, and overall efficiency is typically higher than 30%. Because laser diodes are made of semiconductor materials, they do not require fragile glass housings or complex mirror calibrations, making them robust, durable, and small in size, reducing the overall device size. Of course, the light source 100 can also be replaced by other light sources 100 such as lasers or light-emitting diodes, depending on the actual measurement accuracy, and is not limited here.
[0042] To improve the reflectivity of the object under test, the wavelength range of the beam generated by the laser diode in this embodiment is 400nm to 900nm. That is, the laser diode or laser is selected with a wavelength that has low transmittance and high reflectivity to improve reflectivity and thus improve measurement accuracy. Of course, the wavelength range of the laser diode beam can also be other values, depending on the type of light used. Different wavelength ranges with low transmittance and high reflectivity are used for visible light, infrared light, and ultraviolet light.
[0043] Furthermore, in this embodiment, there are multiple light sources 100, each producing a beam with a different wavelength. By selecting multiple wavelengths of light sources 100, wavelengths with high reflectivity can be chosen based on the reflectivity characteristics of different devices under test, thereby improving measurement efficiency and accuracy. Of course, there can also be only one light source 100; by changing the light source 100 to a different wavelength for different devices under test, reflectivity can be maintained, thus improving measurement accuracy.
[0044] The working principle of the device 1000 for generating multiple parallel collimated beams provided in this embodiment is as follows:
[0045] A light beam emitted from light source 100 is coupled by coupling lens group 200 and then transmitted into optical fiber 300. The light beam emitted from the exit end 310 of optical fiber 300 is processed by collimating lens group 400 to form a collimated beam with a larger diameter. Then it is emitted through aperture 500 to form multiple parallel and collimated beams.
[0046] In summary, the device 1000 for generating multiple parallel collimated beams includes a light source 100, a coupling mirror group 200, an optical fiber 300, a collimating mirror group 400, and an aperture stop 500. The coupling mirror group 200 couples the beam emitted from the light source 100 to obtain a coupled beam; the optical fiber 300 transmits the coupled beam; the collimating mirror group 400 is disposed at the exit end 310 of the optical fiber 300; the aperture stop 500 has multiple small holes 510; the aperture stop 500 is disposed in the exit optical path of the collimating mirror group 400 to emit multiple parallel and collimated beams. By setting the coupling mirror group 200, the beam can be finely shaped to control the beam size and divergence angle, so that the coupled beam can be better matched with the optical fiber 300 and transmitted into the optical fiber 300. Transmission through the optical fiber 300 reduces transmission loss, and the optical fiber 300 has a wider transmission bandwidth. By setting the collimating mirror group, the beam can be converted into a parallel beam to ensure parallel propagation of the light. By setting an aperture stop 500 in the output optical path of the collimating lens group 400, multiple parallel and collimated beams can be obtained. Its overall structure is simple.
[0047] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A device for generating multiple parallel collimated beams, characterized in that, include: Light source (100); A coupling mirror group (200) is used to couple the light beam emitted by the light source (100) to obtain a coupled light beam; An optical fiber (300) is used to transmit the coupled beam; Collimating lens group (400), the collimating lens group (400) is disposed at the output end (310) of the optical fiber (300); An aperture stop (500) is provided with a plurality of small holes (510); the aperture stop (500) is provided on the output light path of the collimating lens group (400) and is used to output multiple parallel and collimated light beams.
2. The apparatus for generating multiple parallel collimated beams according to claim 1, characterized in that, The number of the small holes (510) is even, and the multiple small holes (510) are symmetrically arranged along the center of the aperture plate (500).
3. The apparatus of claim 2, wherein, The number of the small holes (510) is four, and two small holes (510) form a group. Each group of small holes (510) is symmetrically arranged along the outgoing light path through the center of the aperture (500).
4. The apparatus for generating a plurality of collimated parallel light beams according to claim 3, wherein, The angle between the lines connecting the two sets of small holes (510) is a right angle.
5. The apparatus for generating a multi-beam of parallel collimated light beams according to claim 2, wherein, The apparatus (1000) for generating multiple parallel collimated beams further includes a detector for detecting whether the multiple beams emitted through the aperture (500) are centrally symmetrical.
6. The apparatus of claim 1, wherein, The light source (100) is a laser diode.
7. The apparatus for generating a multi-beam of parallel collimated light beams according to claim 6, wherein, The wavelength range of the light beam generated by the laser diode is 400nm to 900nm.
8. The apparatus for generating a plurality of collimated parallel light beams according to any one of claims 1-7, wherein, The collimating lens group (400) includes a meniscus lens and biconvex lenses disposed on both sides of the meniscus lens.
9. The apparatus for generating multiple parallel collimated beams according to any one of claims 1-7, characterized in that, There are multiple light sources (100), and each light source (100) produces a light beam with a different wavelength.
10. An optical measurement system, characterized in that, Includes the apparatus (1000) for generating multiple parallel collimated beams as described in any one of claims 1-9.