Autocollimator image-finding device and imaging device
By using optical systems with spectroscopic prisms, pyramid prisms, focusing lenses and lifting mechanisms in the self-collimator, the rapid identification of the self-collimator is achieved, solving the problems of small field of view, power dependence, accuracy dependence and height in the prior art, and improving the use efficiency and safety.
Patent Information
- Application Number
- CN202421062155.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The field of view of the existing self-collimator is small, which makes it difficult to quickly adjust the reflected light of the mirror to be tested into the detection plane of the image detector in actual use, and the image finding device has problems with power supply, accuracy depends on machining and assembly, and height cannot be adjusted.
An optical system consisting of a spectroscopic prism, a pyramidal prism, and a focusing lens is adopted to achieve height adjustment through the lifting mechanism, and the reference image position is kept unchanged by the characteristics of the pyramidal prism. The deflection angle of the mirror to be measured is adjusted by observing the relative position relationship between the measured image and the reference image, so as to achieve rapid identification of the self-collimator.
It realizes fast and accurate identification of the self-collimator, avoids the power supply problems of laser image finders and the dependence of mechanical accuracy, solves the problem of height inadequate adjustment, and improves the safety of use.
Smart Images
Figure CN222704829U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical measurement, and more specifically to an autocollimator image-finding device and an imaging device. Background Art
[0002] An optical autocollimator is a precision angle measuring device that converts tiny angular displacements into linear displacements for measurement based on the principle of optical autocollimation and combines photoelectric measurement technology. It is widely used in ultra-precision processing and manufacturing, optical component manufacturing and testing, optical instrument calibration and debugging, scientific research and other fields. Due to the limitations of the aperture of the optical system and the size of the image detector, the field of view of the existing autocollimator is generally small. Therefore, in actual use, it is often difficult to quickly adjust the reflected light of the reflector to be measured to the detection surface of the image detector. Some existing image finding devices use laser image finders, and the design of the laser optical axis and the autocollimator optical axis coaxially realizes the alignment function. It is necessary to ensure sufficient power at all times, and the alignment accuracy is highly dependent on the machining accuracy and assembly accuracy. Long-term use is prone to wear or looseness, resulting in the inability to achieve the alignment function. Some naked eye image finding devices are not convenient for measurement personnel to observe images, and some autocollimators use laser light sources or high-brightness light sources. Lasers directly hitting the human eye will cause irreversible damage. Other light sources with high light intensity will cause eye discomfort. Some image finding devices cannot be adjusted in height, and it is not convenient to align with the light outlet of the autocollimator when finding images. Utility Model Content
[0003] In order to overcome the defects in the prior art, the utility model provides an autocollimator image-finding device, which can realize the alignment and image-finding of the autocollimator more quickly and accurately.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] An autocollimator image-finding device comprises a beam splitter prism, a corner cube prism, a focusing lens, an imaging white screen and a lifting mechanism; the beam splitter prism, the corner cube prism and the focusing lens are all mounted on the lifting mechanism, and the lifting mechanism can drive the beam splitter prism, the corner cube prism and the focusing lens to move up and down; the corner cube prism and the focusing lens are respectively mounted on both sides of the beam splitter prism; the imaging white screen is placed at the focal plane of the focusing lens.
[0006] According to the above technical means, the collimated light beam emitted by the autocollimator is divided into two parts: transmitted light and reflected light through a beam splitter. After the reflected light is irradiated to the corner cube prism, it returns along the original optical path, and after being transmitted through the beam splitter prism, it is irradiated to the focusing lens and converged to form an image. Due to the characteristics of the corner cube prism, the position of the image point is theoretically constant and unchanged, which is used as a reference image; the transmitted light is irradiated to the surface of the reflector to be measured and then reflected. The reflected light of the reflector to be measured is also irradiated to the focusing lens and converged to form an image after being reflected by the beam splitter prism. As the measurement image, according to the geometric relationship, the imaging position of the reflected light of the reflector to be measured is related to the deflection angle of the reflector to be measured. When the normal of the reflective surface of the reflector to be measured coincides with the optical axis of the autocollimator, the measurement image will completely coincide with the reference image. Based on this principle, by observing the relative position relationship between the measurement image and the reference image, the measurement image and the reference image are completely coincident by adjusting the deflection angle of the reflector to be measured, thereby realizing the rapid alignment of the autocollimator. And by setting a lifting mechanism, the height adjustable function is realized.
[0007] The utility model provides a more convenient and faster autocollimator image-finding device, which avoids the power supply problem of the laser image finder and the problem of being unable to find the position due to the processing and assembly precision, and also avoids the user directly observing the autocollimator output light with the eyes, and has the function of realizing height adjustment according to the optical axis height of the autocollimator and the reflector to be measured.
[0008] In one embodiment, the optical axis centers of the corner cube prism and the beam splitter prism are on the same straight line, and the corner cube prism is used to reflect the collimated light path into the beam splitter prism after turning it 180°.
[0009] In one embodiment, the optical axis centers of the focusing lens and the beam splitter prism are in the same straight line, and the light beam is incident on the focusing lens, and after being focused by the focusing lens, it is imaged at the focal plane of the focusing lens and is imaged on the imaging white screen.
[0010] In one embodiment, it also includes a first mounting seat, a second mounting seat and a third mounting seat, the first mounting seat is mounted on the lifting mechanism, the second mounting seat and the third mounting seat are respectively mounted on both sides of the first mounting seat; the beam splitter prism is mounted in the first mounting seat, the corner cube prism is mounted in the second mounting seat, and the focusing lens is mounted in the third mounting seat.
[0011] Furthermore, the imaging white screen is separately arranged outside the optical path device and should be placed at the focal plane of the focusing lens when in use to find the clearest imaging.
[0012] In one of the embodiments, the first mounting seat is a square structure with four light openings on its four sides, namely an incident light port, a first light outlet, a second light outlet and a third light outlet; the incident light port is used to receive a collimated light beam emitted from a collimator, the collimated light beam is divided into reflected light and transmitted light on the beam splitting surface of the beam splitting prism, the reflected light is irradiated to the corner cube prism through the first light outlet, after passing through the corner cube prism, it returns along the original light path and is transmitted through the beam splitting prism, and finally is emitted to the focusing lens through the third light outlet; the transmitted light is irradiated to the reflector to be measured through the second light outlet, is reflected by the reflector to be measured to the beam splitting prism, and after being reflected on the beam splitting surface of the beam splitting prism, is emitted to the focusing lens through the third light outlet.
[0013] In one embodiment, the second mounting seat is mounted on the first mounting seat by screws and is located on the side where the first light outlet is located; the third mounting seat is mounted on the first mounting seat by screws and is located on the side where the third light outlet is located. This method can be used to simultaneously mount the beam splitter, the corner cube and the focusing lens, and is convenient for maintenance and replacement.
[0014] In one of the embodiments, the lifting mechanism includes a base, a displacement platform and a lifting frame; the lifting frame is vertically fixed on the base, the displacement platform is horizontally arranged, and one side of the displacement platform is slidably connected to the lifting frame; the first mounting seat is installed on the displacement platform.
[0015] In one embodiment, the displacement platform is slidably connected to the lifting frame via a cross roller guide rail. The lifting mechanism adopts a cross roller guide rail to achieve high-precision and smooth up and down movement, and adopts a differential head to achieve high-precision height adjustment. The height adjustable function can be achieved by rotating the differential head.
[0016] In one embodiment, the bottom screw hole of the first mounting base can also be used to connect with the optical rod and used in conjunction with the rod bracket to achieve a height-adjustable function.
[0017] In one of the embodiments, the first mounting seat is mounted on the displacement platform by bolts.
[0018] The present invention also provides an imaging device, comprising an autocollimator, a reflector to be measured and the above-mentioned image-finding device, wherein the autocollimator is located on the side where the incident port of the first mounting seat is located, and the reflector to be measured and the second light outlet of the first mounting seat are located on the side where the second light outlet of the first mounting seat is located.
[0019] When in use, adjust the incident port of the image-finding device and the light outlet of the autocollimator to the same optical axis height, the reflector to be measured is located on the side of the second light outlet, and the imaging white screen is placed on the focal plane of the focusing lens. When the autocollimator is started, fine-tune the position of the imaging white screen back and forth. When two clear images are observed on the imaging white screen, the reflector to be measured is not perpendicular to the optical axis of the autocollimator. Adjust the reflector to be measured so that the two images overlap, and the collimated light beam can be found.
[0020] Compared with the prior art, the beneficial effects are as follows: the autocollimator image-finding device provided by the utility model can realize rapid alignment of the autocollimator through an optical system composed of a dichroic prism, a corner cube prism, and a focusing lens, thereby avoiding the power supply problem of the laser image finder and the problem of inability to locate the image due to processing and assembly precision, solving the problems of inconvenient observation and eye discomfort in some image-finding devices, and solving the problem of the inability to adjust the height of some image-finding devices through a lifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0022] Figure 2 It is an exploded schematic diagram of the utility model structure.
[0023] Figure 3 It is a schematic diagram of the optical path principle of the utility model.
[0024] Figure numerals: 1. dichroic prism; 2. corner cube prism; 3. focusing lens; 4. imaging white screen; 5. lifting mechanism; 51. base; 52. displacement platform; 53. lifting frame; 6. first mounting seat; 7. second mounting seat; 8. third mounting seat; 9. autocollimator; 10. reflector to be measured. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The utility model is described in one of the embodiments in combination with the specific implementation methods. Among them, the drawings are only used for exemplary descriptions, and only schematic diagrams are shown, not physical drawings, and cannot be understood as limitations on the utility model; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0026] In the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for exemplary explanations and cannot be understood as limitations on the present utility model. For ordinary technicians in the field, the specific meanings of the above terms can be understood according to specific circumstances. In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B.
[0027] Embodiment 1:
[0028] like Figures 1 to 3 As shown, an image-finding device of an autocollimator 9 comprises a beam splitter prism 1, a corner cube prism 2, a focusing lens 3, an imaging white screen 4 and a lifting mechanism 5; the beam splitter prism 1, the corner cube prism 2 and the focusing lens 3 are all mounted on the lifting mechanism 5, and the lifting mechanism 5 can drive the beam splitter prism 1, the corner cube prism 2 and the focusing lens 3 to move up and down; the corner cube prism 2 and the focusing lens 3 are respectively mounted on both sides of the beam splitter prism 1; the imaging white screen 4 is placed at the focal plane of the focusing lens 3.
[0029] According to the above technical means, the collimated light beam emitted by the autocollimator 9 is divided into two parts: transmitted light and reflected light through the beam splitter 1. After the reflected light is irradiated to the corner cube 2, it returns along the original optical path, and after being transmitted through the beam splitter 1, it is irradiated to the focusing lens 3 and converged to form an image. Due to the characteristics of the corner cube 2, the image point position is theoretically constant and unchanged, which is used as a reference image; the transmitted light is irradiated to the surface of the reflector 10 to be measured and then reflected. After the reflected light of the reflector 10 to be measured is reflected by the beam splitter 1, it is also irradiated to the focusing lens 3 and converged to form an image, which is used as a measurement image. According to the geometric relationship, the imaging position of the reflected light of the reflector 10 to be measured is related to the deflection angle of the reflector 10 to be measured. When the normal of the reflection surface of the reflector 10 to be measured coincides with the optical axis of the autocollimator 9, the measurement image will completely coincide with the reference image. Based on this principle, by observing the relative position relationship between the measurement image and the reference image, the measurement image and the reference image are completely coincident by adjusting the deflection angle of the reflector 10 to be measured, thereby realizing the rapid alignment of the autocollimator 9. And by setting the lifting mechanism 5, the height adjustable function is realized.
[0030] The utility model provides a more convenient and faster image-finding device for the autocollimator 9, which avoids the power supply problem of the laser image finder and the problem of being unable to find the image due to the processing and assembly precision, and also avoids the user from directly observing the output light of the autocollimator 9 with the eyes, and has the function of realizing height adjustment according to the optical axis height of the autocollimator 9 and the reflector 10 to be measured.
[0031] The optical axis centers of the corner cube 2 and the beam splitter 1 are on the same straight line, and the corner cube 2 is used to reflect the collimated light path to the beam splitter 1 after turning 180 degrees. The optical axis centers of the focusing lens 3 and the beam splitter 1 are on the same straight line, and the light beam is incident on the focusing lens 3, and after being focused by the focusing lens 3, it forms an image at the focal plane of the focusing lens 3, and forms an image on the imaging white screen 4.
[0032] In addition, it also includes a first mounting seat 6, a second mounting seat 7 and a third mounting seat 8. The first mounting seat 6 is fixed on the lifting mechanism 5, and the second mounting seat 7 and the third mounting seat 8 are respectively installed on both sides of the first mounting seat 6; the beam splitter prism 1 is installed in the first mounting seat 6, the corner cube prism 2 is installed in the second mounting seat 7, and the focusing lens 3 is installed in the third mounting seat 8.
[0033] like Figure 2 As shown, the first mounting seat 6 is a square structure with four light openings arranged around it, namely an incident port, a first light outlet, a second light outlet and a third light outlet; the incident port is used to receive the collimated light beam emitted from the collimator 9, and the collimated light beam is divided into two beams of reflected light and transmitted light on the splitting surface of the splitting prism 1, the reflected light after turning 90° is emitted to the corner cube prism 2 through the first light outlet, and the transmitted light is emitted to the reflector 10 to be measured through the second light outlet; the reflected light of the first splitting is reflected by the corner cube prism 2 by turning 180° and is incident on the splitting prism 1 again through the first light outlet, is transmitted on the splitting surface, and is emitted to the focusing lens 3 through the third light outlet; the transmitted light of the first splitting is reflected to the splitting surface by the reflector 10 to be measured, and is emitted to the focusing lens 3 through the third light outlet after reflection.
[0034] In this embodiment, the second mounting seat 7 is mounted on the first mounting seat 6 by screws and is located on the side where the first light outlet is located; the third mounting seat 8 is mounted on the first mounting seat 6 by screws and is located on the side where the third light outlet is located.
[0035] In summary, the autocollimator 9 image-finding device provided in this embodiment can realize rapid alignment of the autocollimator 9 through an optical system composed of a beam splitter prism 1, a corner cube prism 2, and a focusing lens 3, thereby avoiding the power supply problem of the laser image finder and the alignment problem caused by processing and assembly precision, solving the problems of inconvenience in observation and eye discomfort in some image-finding devices, and solving the problem of the inability to adjust the height of some image-finding devices through the lifting mechanism 5.
[0036] Example 2
[0037] The other structures of this embodiment are the same as those of the embodiment 1, except that, in this embodiment, the lifting mechanism 5 includes a base 51, a displacement platform 52 and a lifting frame 53; the lifting frame 53 is vertically fixed on the base 51, the displacement platform 52 is horizontally arranged, and one side of the displacement platform 52 is slidably connected to the lifting frame 53; the first mounting seat 6 is mounted on the displacement platform 52. The displacement platform 52 is slidably connected to the lifting frame 53 through a cross roller guide rail. The first mounting seat 6 is mounted on the displacement platform 52 by bolts.
[0038] Example 3
[0039] This embodiment provides an imaging device, including an autocollimator 9, a reflector to be measured 10 and the above image finding device, wherein the autocollimator 9 is located on the side where the incident port of the first mounting seat 6 is located, and the reflector to be measured 10 and the second light outlet of the first mounting seat 6 are located on the side where the second light outlet is located.
[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0041] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.
Claims
1. An autocollimator image-finding device, characterized in that: The invention comprises a beam splitter prism (1), a corner cube prism (2), a focusing lens (3), an imaging white screen (4) and a lifting mechanism (5); the beam splitter prism (1), the corner cube prism (2) and the focusing lens (3) are all mounted on the lifting mechanism (5); the lifting mechanism (5) can drive the beam splitter prism (1), the corner cube prism (2) and the focusing lens (3) to move up and down; the corner cube prism (2) and the focusing lens (3) are respectively mounted on two sides of the beam splitter prism (1); and the imaging white screen (4) is placed at the focal plane of the focusing lens (3).
2. The autocollimator image-finding device according to claim 1, characterized in that: The optical axis centers of the corner cube prism (2) and the beam splitter prism (1) are on the same straight line, and the corner cube prism (2) is used to reflect the collimated light path into the beam splitter prism (1) after turning it 180 degrees.
3. The autocollimator image-finding device according to claim 2, characterized in that: The optical axis centers of the focusing lens (3) and the beam splitter prism (1) are on the same straight line; a light beam is incident on the focusing lens (3), is focused by the focusing lens (3), and is imaged at a focal plane of the focusing lens (3), and is also imaged on the imaging white screen (4).
4. The autocollimator image-finding device according to claim 3, characterized in that: It also comprises a first mounting seat (6), a second mounting seat (7) and a third mounting seat (8), wherein the first mounting seat (6) is mounted on the lifting mechanism (5), and the second mounting seat (7) and the third mounting seat (8) are respectively mounted on two sides of the first mounting seat (6); the beam splitter prism (1) is mounted in the first mounting seat (6), the corner cube prism (2) is mounted in the second mounting seat (7), and the focusing lens (3) is mounted in the third mounting seat (8).
5. The autocollimator image-finding device according to claim 4, characterized in that: The first mounting seat (6) is a square structure, and is provided with four light openings on its periphery, namely an incident light opening, a first light exit opening, a second light exit opening and a third light exit opening; the incident light opening is used to receive a collimated light beam emitted from a collimator (9); the collimated light beam is divided into reflected light and transmitted light on the beam splitting surface of the beam splitting prism (1); the reflected light is irradiated to the corner cube prism (2) through the first light exit opening, returns along the original light path after passing through the corner cube prism (2), is transmitted through the beam splitting prism (1), and finally is emitted to the focusing lens (3) through the third light exit opening; the transmitted light is irradiated to the to-be-measured reflector (10) through the second light exit opening, is reflected to the to-be-measured reflector (10), is reflected on the beam splitting surface of the beam splitting prism (1), and is emitted to the focusing lens (3) through the third light exit opening.
6. The autocollimator image-finding device according to claim 4, characterized in that: The second mounting seat (7) is mounted on the first mounting seat (6) by means of screws and is located on the side where the first light exit is located; the third mounting seat (8) is mounted on the first mounting seat (6) by means of screws and is located on the side where the third light exit is located.
7. The autocollimator image-finding device according to any one of claims 4 to 6, characterized in that: The lifting mechanism (5) comprises a base (51), a displacement platform (52) and a lifting frame (53); the lifting frame (53) is vertically fixed on the base (51), the displacement platform (52) is horizontally arranged, and one side of the displacement platform (52) is slidably connected to the lifting frame (53); the first mounting seat (6) is mounted on the displacement platform (52).
8. The autocollimator image-finding device according to claim 7, characterized in that: The displacement platform (52) is slidably connected to the lifting frame (53) via a cross roller guide rail.
9. The autocollimator image-finding device according to claim 7, characterized in that: The first mounting seat (6) is mounted on the displacement platform (52) by means of bolts.
10. An imaging device, characterized in that: The invention comprises an autocollimator (9), a reflector to be measured (10), and an image-finding device as claimed in any one of claims 4 to 9, wherein the autocollimator (9) is located on the side where the incident port of the first mounting seat (6) is located, and the reflector to be measured (10) is located on the side where the second light outlet of the first mounting seat (6) is located.