Optical path adjusting device, optical device, and optical path adjusting method

Abstract

The present disclosure provides an optical path adjustment device, which comprises a standard target for providing calibration light, a prism to be adjusted for receiving and reflecting the calibration light, a collimator for transmitting the calibration light reflected by the prism to be adjusted, a dichroic mirror for splitting the calibration light transmitted by the collimator into a first light beam and a second light beam, a first camera for receiving the first light beam and generating a first image, and a second camera for receiving the second light beam and generating a second image; wherein, when the prism to be adjusted is adjusted, the correlation between a first parameter and a second parameter of the optical path adjustment device is obtained according to the changes of the first image and the second image; and the first parameter and the second parameter are simultaneously satisfied with a preset requirement when the prism to be adjusted is adjusted according to the correlation between the first parameter and the second parameter. The present disclosure also provides an optical device and an optical path adjustment method.

Description

Technical Field

[0001] This disclosure relates to an optical path calibration device, an optical device, and an optical path calibration method. Background Technology

[0002] In optical imaging systems, the prism (reflecting prism) needs to be adjusted to achieve a clear image. However, during the adjustment process, it is crucial to ensure that the parallel and centered positions of the reflecting prism meet the requirements simultaneously. Otherwise, the imaging effect of the optical imaging system will be poor, resulting in issues such as uneven imaging, inability to locate the imaging position, or failure to achieve the required parfocal position.

[0003] In existing technologies, a single camera is typically used to detect the imaging of an optical imaging system in a time-division manner, thereby adjusting the parallel and central positions of the reflecting prism in a time-division manner. However, the parallel and central positions of the reflecting prism affect each other during the adjustment process, requiring multiple repeated adjustments to ensure that the parallel and central positions of the reflecting prism meet the requirements, which is time-consuming and labor-intensive. Summary of the Invention

[0004] To address one of the aforementioned technical problems, this disclosure provides an optical path calibration device, an optical device, and an optical path calibration method.

[0005] According to one aspect of this disclosure, an optical path calibration apparatus is provided, comprising:

[0006] A standard target, which is used to provide calibration light;

[0007] A prism to be calibrated, wherein the prism to be calibrated is used to receive calibration light and reflect the calibration light;

[0008] A collimator, used to transmit calibration light reflected by the prism to be calibrated;

[0009] A dichroic mirror is used to split the calibration light transmitted by the collimator into a first beam and a second beam; wherein the first beam and the second beam are not parallel.

[0010] A first camera, configured to receive the first light beam and generate a first image; and

[0011] A second camera is used to receive the second light beam and generate a second image;

[0012] Specifically, when adjusting the prism to be calibrated, the correlation between the first parameter and the second parameter of the optical path calibration device is obtained based on the changes in the first image and the second image; and based on the correlation between the first parameter and the second parameter, the first parameter and the second parameter are simultaneously made to meet preset requirements when the prism to be calibrated is adjusted.

[0013] According to at least one embodiment of the optical path calibration apparatus of this disclosure, when the prism to be calibrated is adjusted to a standard position, the first parameter and the second parameter simultaneously meet preset requirements.

[0014] According to at least one embodiment of the optical path calibration apparatus of this disclosure, the first parameter includes the distance value between the center position of the first image and the center position of the standard target. When the center position of the first image and the center position of the standard target coincide, or when the center position of the first image and the center position of the standard target are within a preset range, the first parameter satisfies the preset requirements.

[0015] According to at least one embodiment of the optical path calibration apparatus of this disclosure, the second parameter includes the distance value between the center position of the second image and the center position of the standard target. When the center position of the second image coincides with the center position of the standard target, or when the center position of the second image and the center position of the standard target are within a preset range, the second parameter satisfies the preset requirements.

[0016] The optical path calibration apparatus according to at least one embodiment of the present disclosure further includes:

[0017] A supplementary lighting device is used to provide a light source to a standard target so that the intensity of the calibration light on the standard target is greater than a preset threshold.

[0018] The optical path calibration apparatus according to at least one embodiment of the present disclosure further includes:

[0019] A first focusing assembly is located between the prism to be adjusted and the collimator, so that the plane containing the standard target can be imaged at the positions of the first camera and the second camera.

[0020] According to another aspect of this disclosure, an optical device is provided, which includes the above-described optical path adjustment device.

[0021] According to another aspect of this disclosure, an optical path calibration method is provided, which utilizes the aforementioned optical path calibration apparatus, the optical path calibration method comprising:

[0022] The standard target is used to provide calibration light;

[0023] The calibration light is received by the prism to be calibrated and then reflected.

[0024] The calibration light reflected by the prism to be calibrated is transmitted through a collimator;

[0025] The calibration light transmitted through the collimator is split into a first beam and a second beam by a dichroic mirror; the first beam and the second beam are not parallel.

[0026] The first light beam is received by the first camera and a first image is generated;

[0027] The second light beam is received by the second camera and a second image is generated.

[0028] The position of the prism to be calibrated is adjusted to obtain the changes in the first image and the second image, so as to obtain the correlation between the first parameter and the second parameter of the optical path calibration device; and based on the correlation between the first parameter and the second parameter, the first parameter and the second parameter are simultaneously satisfied with the preset requirements when the prism to be calibrated is adjusted.

[0029] According to at least one embodiment of the optical path calibration method of this disclosure, a light source is provided to a standard target through a supplementary lighting device.

[0030] According to at least one embodiment of the optical path calibration method of this disclosure, when the prism to be calibrated is adjusted to a standard position, the first parameter and the second parameter simultaneously meet preset requirements. Attached Figure Description

[0031] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0032] Figure 1 This is a schematic diagram of the structure of an optical path calibration device according to one embodiment of the present disclosure.

[0033] Figure 2 This is a schematic diagram of an optical path calibration method according to one embodiment of the present disclosure.

[0034] Figure 3 This is a schematic diagram of the adjustment structure of the prism to be adjusted according to one embodiment of the present disclosure.

[0035] The specific labels in the attached figures are as follows:

[0036] 100 optical path calibration device

[0037] 110 standard target

[0038] 120 Prisms to be Adjusted

[0039] 130 parallel light tube

[0040] 140 dichroic mirror

[0041] 150 First Camera

[0042] 160 second camera

[0043] 170 fill light device

[0044] 181 First Focusing Component

[0045] 182 Second Focusing Component

[0046] 183 Third focusing assembly. Detailed Implementation

[0047] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0048] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0050] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0051] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0052] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0053] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0054] Figure 1 This is a schematic diagram of the structure of an optical path calibration device 100 according to one embodiment of the present disclosure.

[0055] like Figure 1 As shown, this disclosure provides an optical path calibration device 100, which may include: a standard target 110, a prism to be calibrated 120, a collimator 130, a dichroic mirror 140, a first camera 150, and a second camera 160, etc.

[0056] The standard target 110 is used to provide calibration light. In one embodiment, the standard target 110 has a circular structure and at least two scale lines are provided on its light-reflecting surface. Preferably, the standard target 110 includes two scale lines that intersect perpendicularly, and the intersection of the two scale lines coincides with the center of the standard target 110.

[0057] In this disclosure, the standard target 110 can present a clear image on the first camera 150 and the second camera 160 by reflecting natural light; on the other hand, when the brightness of the standard target 110 is low, the first camera 150 and the second camera 160 may not be able to form a clear image of the standard target 110, and at this time, it is necessary to supplement the light on the standard target 110.

[0058] For example, the optical path calibration device 100 may also include a supplementary light device 170, which is used to provide a light source to the standard target 110 so that the intensity of the calibration light of the standard target 110 is greater than a preset threshold. That is, the surface of the standard target 110 facing the prism 120 to be calibrated is relatively bright at this time.

[0059] The prism 120 to be adjusted is used to receive and reflect the calibration light; that is, the prism 120 to be adjusted is used to change the propagation direction of the calibration light. In one embodiment, the prism 120 to be adjusted can be a component such as a reflecting prism.

[0060] In one embodiment, a component for light transmission may also be provided between the standard target 110 and the prism to be calibrated 120, wherein the component for light transmission may be a collimator, which may be horizontally positioned.

[0061] Accordingly, the light generated by the supplementary lighting device 170 can directly illuminate the standard target 110, or be illuminated to the standard target 110 after passing through the collimator.

[0062] In this disclosure, when the position and orientation of the prism 120 to be adjusted change, the angle of the reflected light will change. When the reflected light passes through different combinations of focusing components, different images will be formed. The images will reflect whether the position of the prism 120 to be adjusted is a standard position or whether it is near the standard position.

[0063] The standard position includes a parallel position and a center position. The parallel position means that when a horizontally propagating light beam shines on the prism 120 to be adjusted, the prism 120 reflects the light beam so that it propagates in a vertical direction or in a roughly vertical direction. The center position means that when a horizontally propagating light beam shines on the prism 120 to be adjusted, the center of the light beam coincides with the center of the prism 120 to be adjusted, or the positional deviation between the center of the light beam and the center of the prism 120 to be adjusted is within a preset range.

[0064] In one embodiment, the collimator 130 is used to transmit calibration light reflected by the prism 120 to be calibrated. Preferably, the collimator 130 is vertically arranged; in this case, a first focusing component 181 can be arranged inside the collimator 130, the first focusing component 181 being located between the prism 120 to be calibrated and the collimator 130, so that the plane containing the standard target 110 can be imaged at the positions of the first camera 150 and the second camera 160.

[0065] The dichroic mirror 140 is used to split the calibration light transmitted by the collimator 130 into a first beam and a second beam; wherein the first beam and the second beam are not parallel; more preferably, the first beam and the second beam are perpendicular to each other. In a preferred embodiment, the first beam is transmitted horizontally and the second beam is transmitted vertically.

[0066] The first camera 150 is used to receive the first light beam and generate a first image; the second camera 160 is used to receive the second light beam and generate a second image; preferably, a second focusing component 182 is disposed between the dichroic mirror 140 and the first camera 150, and a third focusing component 183 is disposed between the dichroic mirror 140 and the second camera 160, wherein the first focusing component 181 and the second focusing component 182 are configured such that the first image generated by the first camera 150 can at least represent the parallel position (parallel image) of the prism 120 to be adjusted; in addition, the first focusing component 181 and the third focusing component 183 are configured such that the second image generated by the second camera 160 can at least represent the center position (center image) of the prism to be adjusted.

[0067] Therefore, when the optical path calibration device 100 disclosed herein is used, it can characterize the changes in the parallel position and the center position of the prism 120 to be calibrated through the first image and the second image when the position of the prism 120 to be calibrated changes, thereby enabling simultaneous calibration of the parallel position and the center position of the prism 120 to be calibrated.

[0068] In other words, when adjusting the prism 120 to be calibrated, the correlation between the first parameter and the second parameter of the optical path calibration device 100 is obtained based on the changes in the first image and the second image; and based on the correlation between the first parameter and the second parameter, the first parameter and the second parameter are simultaneously made to meet the preset requirements when the prism 120 to be calibrated is adjusted.

[0069] The first parameter can characterize the parallel position of the prism 120 to be adjusted, and the second parameter can characterize the center position of the prism 120 to be adjusted. Thus, during the adjustment process, when adjusting the parallel position of the prism 120 to be adjusted, the parallel position of the prism 120 to be adjusted can be reflected through the first image, and correspondingly, the center position of the prism 120 to be adjusted can also be reflected through the second image. This allows for a direct assessment of whether the adjustment process of the parallel position of the prism 120 to be adjusted is correct.

[0070] Accordingly, when the prism 120 to be adjusted is adjusted to the standard position, the first parameter and the second parameter simultaneously meet the preset requirements.

[0071] Specifically, the first parameter includes the distance between the center position of the first image and the center position of the standard target 110. When the center position of the first image coincides with the center position of the standard target 110, or when the center position of the first image and the center position of the standard target 110 are within a preset range, the first parameter meets the preset requirements.

[0072] The second parameter includes the distance between the center position of the second image and the center position of the standard target 110. When the center position of the second image coincides with the center position of the standard target 110, or when the center position of the second image and the center position of the standard target 110 are within a preset range, the second parameter meets the preset requirements.

[0073] According to another aspect of this disclosure, an optical device is provided, which includes the optical path adjustment device 100 described above. Preferably, the optical device can be an optical imaging system or the like.

[0074] Figure 2 This is a schematic diagram of an optical path calibration method according to one embodiment of the present disclosure.

[0075] According to another aspect of this disclosure, such as Figure 2 As shown, this disclosure provides an optical path calibration method, which is implemented using the aforementioned optical path calibration device 100. The optical path calibration method includes:

[0076] The standard target 110 is used to provide calibration light;

[0077] The calibration light is received by the prism 120 to be calibrated and then reflected.

[0078] The calibration light reflected by the prism 120 to be calibrated is transmitted through the collimator 130;

[0079] The calibration light transmitted by the collimator 130 is divided into a first beam and a second beam by the dichroic mirror 140; wherein the first beam and the second beam are not parallel.

[0080] The first light beam is received by the first camera 150 and a first image is generated;

[0081] The second light beam is received by the second camera 160 and a second image is generated;

[0082] The position of the prism 120 to be calibrated is adjusted to obtain the changes in the first image and the second image, so as to obtain the correlation between the first parameter and the second parameter of the optical path calibration device 100; and according to the correlation between the first parameter and the second parameter, the prism 120 to be calibrated is adjusted so that the first parameter and the second parameter simultaneously meet the preset requirements.

[0083] In this disclosure, when the prism 120 to be adjusted is adjusted to the standard position, the first parameter and the second parameter simultaneously meet the preset requirements.

[0084] Figure 3 This is a schematic diagram of the adjustment structure of the prism to be adjusted according to one embodiment of the present disclosure.

[0085] In this disclosure, such as Figure 3 As shown, the prism 120 to be adjusted is mounted on the mounting base 122 via adjusting screw 121. When adjusting the position of the prism 120, the adjusting screw 121 can be adjusted to change the vertical position and tilt angle of the prism 120, so that the parallel position of the prism 120 meets the requirements, and the center position of the prism 120 is close to the standard position. Then, the mounting base 122 of the prism 120 is moved as a whole until the center position meets the requirements. At this time, the parallel position will not change significantly, so it can be considered that the parallel position of the prism 120 also meets the requirements.

[0086] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. An optical path calibration device, characterized in that, include: A standard target, which is used to provide calibration light; A prism to be calibrated, wherein the prism to be calibrated is used to receive calibration light and reflect the calibration light; A collimator, used to transmit calibration light reflected by the prism to be calibrated; A dichroic mirror is used to split the calibration light transmitted by the collimator into a first beam and a second beam; wherein the first beam and the second beam are not parallel. A first camera, configured to receive the first light beam and generate a first image; and A second camera is used to receive the second light beam and generate a second image; Specifically, when adjusting the prism to be calibrated, the correlation between the first parameter and the second parameter of the optical path calibration device is obtained based on the changes in the first image and the second image; and based on the correlation between the first parameter and the second parameter, the first parameter and the second parameter are simultaneously made to meet preset requirements when the prism to be calibrated is adjusted.

2. The optical path calibration device as described in claim 1, characterized in that, When the prism to be calibrated is adjusted to the standard position, the first parameter and the second parameter simultaneously meet the preset requirements.

3. The optical path calibration device as described in claim 1, characterized in that, The first parameter includes the distance between the center position of the first image and the center position of the standard target. When the center position of the first image and the center position of the standard target coincide, or when the center position of the first image and the center position of the standard target are within a preset range, the first parameter meets the preset requirements.

4. The optical path calibration device as described in claim 1, characterized in that, The second parameter includes the distance between the center position of the second image and the center position of the standard target. When the center position of the second image coincides with the center position of the standard target, or when the center position of the second image and the center position of the standard target are within a preset range, the second parameter meets the preset requirements.

5. The optical path calibration device as described in claim 1, characterized in that, Also includes: A supplementary lighting device is used to provide a light source to a standard target so that the intensity of the calibration light on the standard target is greater than a preset threshold.

6. The optical path calibration device as described in claim 1, characterized in that, Also includes: A first focusing assembly is located between the prism to be adjusted and the collimator, so that the plane containing the standard target can be imaged at the positions of the first camera and the second camera.

7. An optical device, characterized in that, The optical path calibration device includes any one of claims 1-6.

8. An optical path calibration method, implemented using the optical path calibration device according to any one of claims 1-6, characterized in that, The optical path calibration method includes: The standard target is used to provide calibration light; The calibration light is received by the prism to be calibrated and then reflected. The calibration light reflected by the prism to be calibrated is transmitted through a collimator; The calibration light transmitted through the collimator is split into a first beam and a second beam by a dichroic mirror; the first beam and the second beam are not parallel. The first light beam is received by the first camera and a first image is generated; The second light beam is received by the second camera and a second image is generated. The position of the prism to be calibrated is adjusted to obtain the changes in the first image and the second image, so as to obtain the correlation between the first parameter and the second parameter of the optical path calibration device; and based on the correlation between the first parameter and the second parameter, the first parameter and the second parameter are simultaneously satisfied with the preset requirements when the prism to be calibrated is adjusted.

9. The optical path calibration method as described in claim 8, characterized in that, A light source is provided to the standard target through a supplementary lighting device.

10. The optical path calibration method as described in claim 8, characterized in that, When the prism to be calibrated is adjusted to the standard position, the first parameter and the second parameter simultaneously meet the preset requirements.

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