CN219589922U

CN219589922U - Pyramid polarization-maintaining testing device

Info

Publication number: CN219589922U
Application number: CN202320655240.XU
Authority: CN
Inventors: 王永慧; 贺鹏; 肖志全; 许小强
Original assignee: Wuhan Youguang Technology Co ltd
Current assignee: Wuhan Youguang Technology Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-08-25
Anticipated expiration: 2033-03-29

Abstract

The utility model discloses a pyramid polarization-maintaining testing device, which comprises a light source, a polarizer, a reflecting mirror, a pyramid to be tested and a polarization analyzer, wherein the polarization characteristic of the polarizer is adjustable; the light emitted by the light source is incident to the polarizer, the emergent light of the polarizer is incident to the reflector, the reflected light of the reflector is incident to the pyramid to be measured, and the polarization analyzer acquires the emergent light of the polarizer, the reflected light of the reflector or the emergent light of the pyramid to be measured respectively. According to the utility model, the polarization analysis is carried out on the outgoing light of the polarizer through adjusting the polarizer and through the polarization analyzer, so that the polarization characteristic of the outgoing light of the polarizer is ensured, the polarization characteristic of the outgoing light of the reflector is obtained through the polarization analyzer, so that the consistency of the polarization characteristics of the outgoing light of the reflector and the outgoing light of the polarizer is ensured, finally, the polarization characteristic of the outgoing light of the pyramid to be detected is obtained through the polarization analyzer, and the polarization characteristic of the pyramid to be detected is compared with the polarization characteristic of the incoming light of the pyramid to be detected, so that the polarization characteristic of the pyramid to be detected is determined.

Description

Pyramid polarization-maintaining testing device

Technical Field

The utility model relates to the field of optical elements, in particular to a pyramid polarization-maintaining testing device, which is used for measuring polarization characteristics of light beams after passing through a pyramid.

Background

A pyramid is a commonly used optical element in the field of optical instrument design, which resembles a corner of a cube, the front face being planar and the back face being perpendicular to each other. Light is incident from the front side, and the reflected light and the incident light form 180 degrees by utilizing the principle of total reflection. Such a structure is more stable than a planar mirror structure.

In the optical field, different pyramids are applied to change the light displacement, so that the precision of the instrument and equipment can be correspondingly improved. However, at the same time, the requirements for light are higher and higher, and the requirements for changing the displacement after the light passes through the pyramid and not changing the polarization characteristic are also higher and higher. And along with development, the size of the pyramid is different, and if a measuring instrument is perfectly matched with the pyramid, a light path needs to be built again, so that the measuring instrument is inconvenient to measure and has low efficiency.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a pyramid polarization maintaining testing device which is used for conveniently and rapidly testing the polarization maintaining performance of a pyramid.

The utility model is realized by the following technical scheme:

the pyramid polarization-maintaining testing device comprises a light source, a polarizer, a reflecting mirror, a pyramid to be tested and a polarization analyzer, wherein the polarization characteristic of the polarizer is adjustable; the light emitted by the light source is incident to the polarizer, the emergent light of the polarizer is incident to the reflector, the reflected light of the reflector is incident to the pyramid to be measured, and the polarization analyzer acquires the emergent light of the polarizer, the reflected light of the reflector or the emergent light of the pyramid to be measured respectively.

According to the technical scheme, the polarization analysis is carried out on the outgoing light of the polarizer through the adjustment of the polarizer and the polarization analyzer, the polarization characteristic of the outgoing light of the polarizer is ensured, the polarization characteristic of the outgoing light of the reflecting mirror is obtained through the polarization analyzer, so that the consistency of the polarization characteristics of the outgoing light of the reflecting mirror and the outgoing light of the polarizer is ensured, finally, the polarization characteristic of the outgoing light of the pyramid to be detected is obtained through the polarization analyzer, and the polarization characteristic of the pyramid to be detected is compared with the polarization characteristic of the incoming light of the pyramid to be detected, so that the polarization characteristic of the pyramid to be detected is determined.

Optionally, the light source, polarizer and mirror are arranged in sequence along the light path.

Optionally, the position of the polarization analyzer is adjustable. The position of the polarization analyzer is adjusted, so that the outgoing light of the polarizer, the reflection light of the reflector or the outgoing light of the pyramid to be detected can be obtained conveniently.

Optionally, the rotation angle of the polarizer is adjustable. The direction of polarized light is adjusted by rotating the angle of the polarizer.

Optionally, the polarizer employs a linear polarizer, a circular polarizer, or an elliptical polarizer.

Optionally, the light source is implemented with a laser.

Optionally, the reflection angle of the reflecting mirror is adjustable. Through adjusting the reflection angle of the reflector, light rays can be made to enter the pyramid to be measured in different azimuth angles, polarization data of a plurality of groups of pyramid to be measured are obtained, and more accurate polarization characteristics of the pyramid to be measured are convenient to determine.

Optionally, the reflecting mirror is provided with an adjusting bracket to adjust the reflecting angle of the reflecting mirror.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the polarization characteristics of polarized light are regulated by the polarizer, so that the polarization characteristics of incident light of the measured pyramid are ensured, the polarization characteristics of emergent light of the measured pyramid are compared with the polarization characteristics of the incident light to obtain the polarization maintaining characteristics of the pyramid, and the angle of incidence to the pyramid to be measured is regulated by the reflector, so that light rays are incident along different azimuth angles, and therefore, multiple groups of polarization maintaining data of the measured pyramid are obtained, and the polarization characteristics of the light rays of the measured pyramid are accurately obtained.

(2) The utility model can adapt to pyramid measurement with different sizes through the reflection angle adjustment of the reflecting mirror, does not need to re-construct a light path, reduces the test cost and improves the test efficiency.

(3) According to the utility model, the polarization characteristics of the outgoing light of the polarizer and the outgoing light of the reflecting mirror are analyzed respectively through the polarization analyzer, so that the polarization characteristics of the outgoing light of the reflecting mirror are consistent with those of the outgoing light of the polarizer, and the polarization characteristic test of the outgoing light of the subsequent pyramid to be tested is facilitated.

Drawings

Fig. 1 is a schematic view of an optical path of a pyramid polarization maintaining testing device according to an embodiment of the present utility model.

Fig. 2 is a schematic view of an optical path for acquiring polarization characteristics of outgoing light of a polarizer according to an embodiment of the present utility model.

Fig. 3 is a schematic optical path diagram for acquiring polarization characteristics of outgoing light of a reflecting mirror according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The utility model provides a pyramid polarization maintaining testing device for solving the problem of polarization characteristics of linearly polarized light after passing through a pyramid, which can be used for realizing the pyramid polarization maintaining test, avoiding deviation generated in the testing process, improving the precision of finished products and improving the production efficiency and yield.

After the light path is built, firstly, the polarization direction (such as the horizontal direction) of the light passing through the polarizer is determined by adjusting the polarizer; secondly, after the reflector is installed, determining the polarization characteristic of the light passing through the reflector, and if the polarization characteristic of the light passing through the reflector has deviation, adopting an adjusting polarizer to correct the polarization state, so as to ensure the direction (such as the horizontal direction) of the polarization characteristic of the light entering the pyramid; finally, the polarization characteristic of the light passing through the pyramid can be measured, and the polarization maintaining condition of the pyramid can be obtained by comparing the emergent light with the incident light.

Optionally, the light source is implemented with a laser.

As shown in fig. 1, light emitted from a light source (such as a laser) forms linearly polarized light through a polarizer, the linearly polarized light is redirected through a metal reflector and is incident into a pyramid, the light is totally reflected through the pyramid, whether the polarization characteristic of the emergent light is changed is judged, and the polarization maintaining condition of the pyramid is judged according to the polarization characteristic condition of the light analyzed by a polarization analyzer.

As shown in fig. 2, during the whole testing process, the polarization direction of the light passing through the polarizer is first determined, and the polarization direction (such as the horizontal direction) of the light can be set by adjusting the polarizer.

As shown in fig. 3, the light passes through the pyramid, and the polarization characteristics of the light are detected by using a polarization analyzer, when the polarizer is changed, the polarization direction of the light is changed, so that the polarization characteristics of the light entering the pyramid can be adjusted; when the direction of the polarizer is unchanged, after the angle of the incident pyramid is changed, light is made to enter along different azimuth angles, then a test is carried out, statistical data is carried out after the test, and a large amount of data is applied to prove how the polarization characteristics of the light passing through the pyramid are changed.

In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present utility model.

Claims

1. The pyramid polarization-maintaining testing device is characterized by comprising a light source, a polarizer, a reflecting mirror, a pyramid to be tested and a polarization analyzer, wherein the polarization characteristic of the polarizer is adjustable; the light emitted by the light source is incident to the polarizer, the emergent light of the polarizer is incident to the reflector, the reflected light of the reflector is incident to the pyramid to be measured, and the polarization analyzer acquires the emergent light of the polarizer, the reflected light of the reflector or the emergent light of the pyramid to be measured respectively.

2. The pyramid polarization-preserving testing device of claim 1, wherein the light source, polarizer and reflector are sequentially disposed along the light path.

3. The pyramid polarization-preserving testing device according to claim 1, wherein the polarization analyzer is adjustable in position.

4. The pyramid polarization-maintaining testing device according to claim 1, wherein the rotation angle of the polarizer is adjustable.

5. The pyramid polarization-preserving testing device as recited in claim 4, wherein the polarizer is a linear polarizer, a circular polarizer or an elliptical polarizer.

6. The pyramid polarization maintaining testing device according to claim 1, wherein the light source is implemented with a laser.

7. The pyramid polarization maintaining testing device according to claim 1, wherein the reflecting angle of the reflecting mirror is adjustable.

8. The pyramid polarization maintaining testing device according to claim 7, wherein the reflecting mirror is provided with an adjusting bracket for adjusting the reflecting angle of the reflecting mirror.