Full-angle incidence optical characteristic detection device for infrared wavelength optical filter
The infrared wavelength optical filter omnidirectional incident optical characteristic detection device solves the problem of optical filter detection, realizes omnidirectional detection of optical filters, and ensures the quality of broadband light source.
Patent Information
- Application Number
- CN202520385693.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Existing technologies are insufficient for effectively detecting the optical characteristics of optical filters, especially under conditions of small size and narrowband light source combining, and cannot meet the quality requirements for broadband light source fabrication.
An infrared wavelength optical filter omnidirectional incident optical characteristic detection device was designed, including a base plate, an input fiber collimator assembly, an electric rotary table, a filter fixture, an arc guide rail, and an output fiber collimator assembly. By adjusting the rotation angle of the filter, the incident angle detection can be achieved from 0 degrees to 89.9 degrees.
The system enables the detection of the full-angle reflection and transmission optical characteristics of optical filters, ensuring that the optical filters meet design requirements and improving the manufacturing quality of broadband light sources.
Smart Images
Figure CN223727386U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model discloses a detection device belongs to optical filter detection device technical field, specifically related to a kind of infrared wavelength optical filter full-angle incident optical characteristic detection device. BACKGROUND
[0002] In the manufacture of broadband light source, often need to use different wavelength narrowband light source to couple out broadband light source, and try to reduce the loss of optical power in coupling, which requires optical wavelength division device, that is, optical filter.
[0003] Optical filter can selectively pass or reflect light of a specific wavelength, and light meeting the design wavelength condition is allowed to pass through or reflect by the filter, so as to realize screening or synthesis of light of different wavelengths.
[0004] As shown in Figure 1 The optical transmission characteristic of a typical short-wavelength optical filter after light is incident on the filter at 45 degrees is shown. When light enters the filter at an angle of 45 degrees, light with a wavelength below 780 nanometers is completely reflected by the filter, and light with a wavelength above 840 nanometers is transmitted through the filter. Part of the light with a wavelength between 780 and 840 nanometers (infrared wavelength) is transmitted, and part is reflected, thereby realizing screening of light of different wavelengths.
[0005] Whether the optical characteristics of the optical filter meet the design requirements will directly affect the quality of the broadband light source, which requires detection of the optical filter. Since the optical filter is used for combining light of different wavelengths, it is different from combining light of different wavelengths with laser. On the one hand, the loss of light passing through the filter or reflecting on the filter surface needs to be considered, and the spectral shape after passing through the filter also needs to be considered to meet the requirements of the broadband light source. In this way, the narrowband light source for combining light must have single-mode characteristics. In the case of fiber coupling of incident light and outgoing light, the spot diameter is very small (usually less than 0.5 mm), and fiber collimator must be used for coupling. Due to the limitation of the packaging shell of the broadband light source device, the size of the optical filter is very small, generally not more than 1.5 mm, which brings special requirements for the detection of the optical filter. UTILITY MODEL CONTENTS
[0006] The utility model discloses a kind of infrared wavelength optical filter full-angle incident optical characteristic detection devices, to detect whether the optical characteristics of the optical filter meet the requirement, solve the problem mentioned above.
[0007] Technical scheme: a kind of infrared wavelength optical filter full-angle incident optical characteristic detection device, the detection device includes: bottom plate, input end fiber collimator assembly, electric rotary table, filter fixture, circular arc guide rail and output end fiber collimator assembly.
[0008] The input end fiber collimator is fixedly installed on the bottom plate, the circular arc guide rail is fixedly installed on the bottom plate, the output end fiber collimator assembly is slidably installed on the circular arc guide rail so that the central axes of the input fiber and the output fiber are perpendicular to each other, the motorized rotary stage is fixedly installed on the bottom plate and located between the input end fiber collimator assembly and the output end fiber collimator assembly to adjust the incident angle between the fiber collimator and the filter, and the filter fixture is installed on the motorized rotary stage.
[0009] In a further embodiment, the input end fiber collimator assembly is composed of an input end fiber collimator, a first five-dimensional adjustment stage and a first collimator clamp.
[0010] The first five-dimensional adjustment stage is fixedly installed on the bottom plate, the first collimator clamp is fixedly installed on the first five-dimensional adjustment stage, and the input end fiber collimator is installed on the first collimator clamp.
[0011] In a further embodiment, the output end fiber collimator assembly is composed of an output end fiber collimator, a second five-dimensional adjustment stage and a second collimator clamp.
[0012] The second five-dimensional adjustment stage is slidably installed on the circular arc guide rail, the second collimator clamp is fixedly installed on the second five-dimensional adjustment stage, and the output end fiber collimator is installed on the second collimator clamp.
[0013] In a further embodiment, the terminal fiber of the input end fiber collimator is fused with a short wavelength broadband light source SLD light emitting device.
[0014] In a further embodiment, the tail end fiber of the output end fiber collimator is connected to a spectrum analyzer through a joint.
[0015] Beneficial effects: the optical filter full-angle reflection and transmission optical property detection device provided by the utility model has simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a typical filter optical property diagram.
[0017] Figure 2 is an infrared short wavelength optical filter full-angle incident optical property detection device principle schematic view of the utility model.
[0018] Figure 3 It is the full-angle transmission optical characteristic detection schematic diagram of the infrared short wavelength optical filter of the utility model.
[0019] Figure 4 It is the full-angle reflection optical characteristic detection schematic diagram of the infrared short wavelength optical filter of the utility model.
[0020] The drawing mark: the filter 1 to be detected, the first five-dimensional adjustment platform 2, the input end optical fiber collimator 3, the filter fixture 4, the output end optical fiber collimator 5, the electric rotary table 6, the first collimator clamp 7, the second collimator clamp 8, the second five-dimensional adjustment platform 9, the circular arc guide rail 10, the bottom plate 11, the short wavelength optical fiber collimator 21, the optical fiber collimator 22, the optical fiber collimator 23, the optical filter 24. DETAILED DESCRIPTION
[0021] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making the creative labor belong to the scope of the utility model protection.
[0022] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0023] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0024] An infrared wavelength optical filter full-angle incident optical characteristic detection device, comprising: a base plate 11, an input end optical fiber collimator assembly, a motorized rotary table 6, a filter fixture 4, a circular arc guide rail 10 and an output end optical fiber collimator assembly.
[0025] In one embodiment, as shown in Figure 3 and Figure 4 , the input end optical fiber collimator is fixedly installed on the base plate, the circular arc guide rail is fixedly installed on the base plate, the output end optical fiber collimator assembly is slidingly installed on the circular arc guide rail so that the center axes of the input optical fiber and the output optical fiber are perpendicular to each other, the motorized rotary table is fixedly installed on the base plate and located between the input end optical fiber collimator assembly and the output end optical fiber collimator assembly to adjust the incident angle between the optical fiber collimator and the filter, and the filter fixture is installed on the motorized rotary table.
[0026] In one embodiment, as shown in Figure 3 and Figure 4 , the input end optical fiber collimator assembly is composed of an input end optical fiber collimator, a first five-dimensional adjustment table and a first collimator clamp;
[0027] the first five-dimensional adjustment table is fixedly installed on the base plate, the first collimator clamp is fixedly installed on the first five-dimensional adjustment table, and the input end optical fiber collimator is installed on the first collimator clamp.
[0028] In one embodiment, as shown in Figure 3 and Figure 4 , the output end optical fiber collimator assembly is composed of an output end optical fiber collimator, a second five-dimensional adjustment table and a second collimator clamp;
[0029] the second five-dimensional adjustment table is slidingly installed on the circular arc guide rail, the second collimator clamp is fixedly installed on the second five-dimensional adjustment table, and the output end optical fiber collimator is installed on the second collimator clamp.
[0030] In one embodiment, as shown in Figure 3 and Figure 4 , the end optical fiber of the input end optical fiber collimator is fused with a short wavelength broadband light source SLD light emitting device.
[0031] In one embodiment, the tail optical fiber of the output end optical fiber collimator is connected to a spectrum analyzer through a joint.
[0032] The working mode of the utility model will be specifically described below in combination with the embodiments:
[0033] Embodiment 1:
[0034] As shown in Figure 2The detection principle of the utility model is: short wavelength fiber collimator 21, fiber collimator 22 and fiber collimator 23 are all short wavelength fiber collimators, short wavelength fiber collimator 21 is input fiber collimator, fiber collimator 22 and fiber collimator 23 are output fiber collimators. In actual use, fiber collimator 22 and fiber collimator 23 can be a fiber collimator, and the rotation device of the fiber collimator coupling table can rotate from the position of fiber collimator 22 to the position of fiber collimator 23, that is, 0~180 degree angle rotation can be realized. Optical filter 24 is the optical filter to be tested and is installed on the rotatable optical filter adjusting table.
[0035] Therefore, the device has at least input fiber collimator adjusting table, output fiber collimator adjusting table and optical filter adjusting table. Due to the reversibility of light, a broadband light source is used to input from short wavelength fiber collimator 21, and the optical filter adjusting table is rotated to set the incident angle of the incident light of short wavelength fiber collimator 21 to the filter from 0 degree (perpendicular incidence) to slightly less than 90 degrees (when the incident angle is 90 degrees, the incident light is almost parallel to the filter, and there is no testing significance). The reflection optical characteristics of the optical filter at this angle can be tested at the position of fiber collimator 22, or the transmission optical characteristics of the optical filter at this angle can be tested at the position of fiber collimator 23. Fiber collimator 22 or 23 is output to the optical spectrum analyzer (OSA), and the reflected or transmitted spectrum shape can be clearly seen by the OSA, so that the transmission or reflection optical characteristics of the filter can be obtained.
[0036] Since the utility model is mainly suitable for the infrared short wavelength range, short wavelength fiber collimator 21, fiber collimator 22 and fiber collimator 23 are all short wavelength single-mode fiber collimators.
[0037] Since the filter adjusting table can be adjusted by 360 degrees, even if the position of short wavelength fiber collimator 21 does not change, the incident angle between the fiber collimator and the filter can be adjusted from 0 degrees (perpendicular incidence) to slightly less than 90 degrees (near horizontal incidence) in principle. In practical application, 45 degree incidence and 0 degree (perpendicular incidence) are most.
[0038] Embodiment 2:
[0039] Combined with Figure 3 And Figure 4 The composition of the detection device of the utility model is specifically explained:
[0040] The filter to be detected 1 is placed on the filter fixture 4, the filter fixture 4 is connected with the electric rotary table 6 through screws, and the electric rotary table 6 is fixedly connected with the bottom plate 11 through screws. The input end optical fiber collimator 3 is fixed by the first collimator clamp 7, the first collimator clamp 7 is installed on the first five-dimensional adjustment table 2 through screws, and the first five-dimensional adjustment table 2 is fixedly connected with the bottom plate 11 through screws. The output end optical fiber collimator 5 is fixed by the second collimator clamp 8, the second collimator clamp 8 is installed on the second five-dimensional adjustment table 9 through screws, the sliding block of the circular arc guide rail 10 is fixedly connected with the second five-dimensional adjustment table 9 through screws, the second five-dimensional adjustment table 9 can rotate and move along the circular arc guide rail under the action of the sliding block, and the circular arc guide rail 10 is fixedly connected with the bottom plate 11 through screws.
[0041] Embodiment 3:
[0042] In combination Figure 3 And Figure 4 The working principle of the utility model is specifically explained as follows:
[0043] Figure 3 It is a schematic diagram for detecting full-angle transmission optical characteristics of an infrared short-wavelength optical filter.
[0044] When working, the tail end of the input end optical fiber collimator 3 is fused with a short-wavelength broadband light source SLD light emitting device, the output light of the SLD is emitted from the input end optical fiber collimator 3, the first five-dimensional adjustment table 2 on the input side and the second five-dimensional adjustment table 9 on the output side are adjusted, so that the light is transmitted through the filter to be detected 1 at a certain angle and coupled into the output end optical fiber collimator 5. The tail end optical fiber of the output end optical fiber collimator 5 is connected with a spectrum analyzer (OSA) through a joint, and the spectrum of the light transmitted through the filter 1 can be observed from the spectrum analyzer (OSA).
[0045] The electric rotary table 6 is controlled to rotate at different angles continuously, so that the filter to be detected 1 rotates at the same angle as the rotary table 6. In the case that the input end optical fiber collimator 3 does not change, the angle between the input end optical fiber collimator 3 and the filter to be detected 1 changes, that is, the incident angle of the input light to the filter changes, and the adjustable range is 0-89.9 degrees (90 degrees means that the incident light is parallel to the filter plane, and there is no testing significance). The spectrum of the light transmitted through the filter to be detected 1 at different angles can be observed through the spectrum analyzer, the detected spectrum is compared with the designed transmission optical characteristics of the filter, and whether the design of the filter meets the requirements can be known.
[0046] Figure 4 It is a schematic diagram for detecting full-angle reflection optical characteristics of an infrared short-wavelength optical filter.
[0047] The second five-dimensional adjustment table 9 is rotated by 90 degrees along the annular guide rail, so that the central axes of the input optical fiber collimator 3 and the output optical fiber collimator 5 are perpendicular to each other.
[0048] In operation, the end fiber of the input fiber collimator 3 is fused with a short wavelength broadband light source SLD light emitting device, the output light of the SLD is emitted from the input fiber collimator 3, and by adjusting the first five-dimensional adjustment table 2 on the input side and the second five-dimensional adjustment table 9 on the output side, the light is reflected and coupled from the filter 1 to the output fiber collimator 5 at a certain angle. The tail fiber of the output fiber collimator 5 is connected to the optical spectrum analyzer (OSA) through a joint, and the spectrum of the light reflected from the filter 1 and entering the output fiber collimator 5 can be observed from the optical spectrum analyzer (OSA).
[0049] The electric rotary table 6 is controlled to rotate continuously at different angles, so that the filter 1 rotates at the same angle as the rotary table 6. In the case where the input fiber collimator 3 does not change, the angle between the fiber collimator 3 and the filter 1 changes, that is, the incident angle of the input to the filter changes, and the adjustable range is 0-89.9 degrees (90 degrees is parallel to the plane of the filter, which has no testing significance). The spectrum of the incident light reflected from the filter 1 at different angles can be observed by the optical spectrum analyzer, and the detected spectrum is compared with the designed reflection optical characteristics of the filter, so that whether the design of the filter meets the requirements can be known.
[0050] Figure 3 And Figure 4 The schematic diagram of testing the transmission and reflection optical characteristics of the optical filter respectively, which can be realized in one device by using a circular arc guide rail. By adjusting the rotation angle of the filter, the incident angle of the input fiber collimator and the optical filter can be adjusted, and the adjustment range is from 0 degrees to 89.9 degrees.
[0051] The optical filter full-angle reflection and transmission optical characteristic detection device provided by the utility model has the advantages of simple structure and convenient operation.
[0052] Obviously, the above embodiments are only examples for clearly illustrating, and not limited to the implementation. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, it is not necessary and impossible to enumerate all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A device for detecting the optical characteristics of an infrared wavelength optical filter under omnidirectional incident light, characterized in that, The detection device includes: a base plate, an input fiber collimator assembly, an electric rotary table, a filter fixture, an arc guide rail, and an output fiber collimator assembly. The input fiber collimator is fixedly mounted on the base plate, the arc guide rail is fixedly mounted on the base plate, the output fiber collimator assembly is slidably mounted on the arc guide rail so that the central axes of the input fiber and the output fiber are perpendicular to each other, the electric rotary table is fixedly mounted on the base plate and located between the input fiber collimator assembly and the output fiber collimator assembly to adjust the incident angle between the fiber collimator and the filter, and the filter fixture is mounted on the electric rotary table.
2. The infrared wavelength optical filter all-angle incident optical characteristic detection device according to claim 1, characterized in that, The input fiber collimator assembly consists of an input fiber collimator, a first five-dimensional adjustment stage, and a first collimator fixture. The first five-dimensional adjustment platform is fixedly installed on the base plate, the first collimator fixture is fixedly installed on the first five-dimensional adjustment platform, and the input fiber collimator is installed on the first collimator fixture.
3. The infrared wavelength optical filter omnidirectional incident optical characteristic detection device according to claim 1, characterized in that, The output fiber collimator assembly consists of an output fiber collimator, a second five-dimensional adjustment stage, and a second collimator fixture. The second five-dimensional adjustment platform is slidably mounted on the arc guide rail, the second collimator clamp is fixedly mounted on the second five-dimensional adjustment platform, and the output fiber collimator is mounted on the second collimator clamp.
4. The infrared wavelength optical filter omnidirectional incident optical characteristic detection device according to claim 2, characterized in that, A short-wavelength broadband light source SLD (Light Rendering Device) is fused to the end fiber of the input fiber collimator.
5. The infrared wavelength optical filter omnidirectional incident optical characteristic detection device according to claim 3, characterized in that, The tail fiber of the output fiber collimator is connected to the spectrometer via a connector.