CN109991712B - U-shaped folded light path adjusting device and method - Google Patents
U-shaped folded light path adjusting device and method Download PDFInfo
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- CN109991712B CN109991712B CN201811463001.4A CN201811463001A CN109991712B CN 109991712 B CN109991712 B CN 109991712B CN 201811463001 A CN201811463001 A CN 201811463001A CN 109991712 B CN109991712 B CN 109991712B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
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Abstract
The invention discloses a U-shaped folding light path adjusting device and a method, wherein the device comprises: the square frame comprises a U-shaped frame and a flat plate, the U-shaped frame is arranged on the lower surface of the flat plate, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame to form a measuring reference, and a first light through hole and a second light through hole are formed in the flat plate and used for repairing and matching lens mounting surfaces at two ends of the U-shaped folding optical system; the pentagon frame is provided with an angle structure, and a plane of the pentagon frame is provided with a third light passing hole for repairing and matching a reflector installation surface of the U-shaped folding optical system. The invention has the advantages that: the method is simple to realize, solves the practical problems that the U-shaped folding optical system cannot quantitatively detect the angle relation between the reflector installation surface and the reference surface, has low installation precision and the like, realizes the real-time detection of the angle relation between the reflector installation surface and the reference surface, completes the precision control of the folding optical path optical element installation surface, and realizes the high-precision and high-efficiency installation and adjustment of the U-shaped folding optical system.
Description
Technical Field
The invention belongs to the technical field of optical assembly and adjustment, and particularly relates to a U-shaped folding optical path assembly and adjustment device and method, which are suitable for high-precision assembly and adjustment of a U-shaped folding optical system.
Background
The U-shaped folding optical system is widely applied to various optical detection systems, and after the U-shaped folding optical path is adopted, the overall dimension of the system can be effectively reduced, and the requirements of compact structure and miniaturization of the system are met. The U-shaped reflection system generally realizes the light path turning by 2 plane reflection elements, because the installation tolerance of the reflection system is tighter than that of a general transmission system, and each plane reflection element has 6 directional degrees of freedom, if the reflection system is not installed at a preset position in the light path, the optical axis of the system deviates from the preset optical axis, the on-axis point of the optical system is equivalent to the off-axis point of the light path after turning, and a large off-axis image difference is caused, thereby influencing the imaging definition. The prior deflection light path assembly has the following problems: the method has the advantages that the method only depends on the experience of installation and adjustment personnel to judge that the installation position of the reflector has great blindness, the consumed time is long, the angle relation between the installation surface of the reflector and the reference surface cannot be quantitatively and timely detected, the installation precision is low, and the assembly quality of an optical system is influenced.
Disclosure of Invention
The invention aims to provide a U-shaped folding optical path adjusting device and method, which solve the practical problems that a U-shaped folding optical system cannot quantitatively detect the angle relation between a reflector mounting surface and a reference surface, the mounting precision is low and the like.
In view of this, the technical solution provided by the present invention is: a U-shaped folded optical path adjusting device comprises:
the square frame comprises a U-shaped frame and a flat plate, the U-shaped frame is arranged on the lower surface of the flat plate, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame to form a measuring reference, and a first light through hole and a second light through hole are formed in the flat plate and used for repairing and matching lens mounting surfaces at two ends of the U-shaped folding optical system;
the pentagon frame is provided with an angle structure, and a plane of the pentagon frame is provided with a third light passing hole for repairing and matching a reflector installation surface of the U-shaped folding optical system.
Another object of the present invention is to provide a method for adjusting a U-shaped folded optical path, comprising:
connecting a square frame with a U-shaped folding optical system, wherein a reference surface of the U-shaped folding optical system is superposed with the lower surface of a flat plate of the square frame, and polishing lens mounting surfaces at two ends of the U-shaped folding optical system;
connecting the pentagonal frame with the U-shaped folding optical system, and converting the mounting surfaces of the two reflectors into horizontal planes to complete the conversion of the folding angle;
after the conversion of the folding angle, the measurement of the reflector mounting surface is completed by matching with a dial indicator, the repair and matching of the reflector mounting surface are performed by using the measurement data, and the precision control of the folding optical path optical reflector mounting surface is completed.
The invention achieves the following significant beneficial effects:
the realization is simple, include: the square frame comprises a U-shaped frame and a flat plate, the U-shaped frame is arranged on the lower surface of the flat plate, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame to form a measuring reference, and a first light through hole and a second light through hole are formed in the flat plate and used for repairing and matching lens mounting surfaces at two ends of the U-shaped folding optical system; the pentagon frame is provided with an angle structure, and a plane of the pentagon frame is provided with a third light passing hole for repairing and matching a reflector installation surface of the U-shaped folding optical system. The real-time detection of the angle relation between the reflector installation surface and the reference surface is realized, the precision control of the installation surface of the optical element of the refraction optical path is completed, and the high-precision and high-efficiency installation and adjustment of the U-shaped refraction optical system are realized. The real-time detection of the angle relation between the reflector mounting surface and the reference surface is realized, the precision control of the mounting surface of the optical element of the folded optical path is completed, and the high-precision and high-efficiency installation and adjustment of the U-shaped folded optical system are realized.
Drawings
FIG. 1 is a schematic diagram of a U-shaped folded optical path structure according to the present invention;
FIG. 2 is a schematic diagram of the square frame of the present invention;
FIG. 3 is a schematic diagram of the pentagon stand of the present invention;
FIG. 4 is a schematic view of the square frame structure of the present invention;
FIG. 5 is a schematic structural diagram of a pentagonal frame of the present invention;
fig. 6 is a flow chart of the U-folded optical path adjusting method of the present invention.
Schematic of the reference numerals
1, a U-shaped folding optical system reference surface 2, a first lens mounting surface 3, a second lens mounting surface 4, a first reflector mounting surface
5. Second reflector installation surface 6, square frame 7, U-shaped deflection light path 8, high-precision assembling workbench
9, U-shaped folding optical system reference surface 10, pentagonal frame 11 and high-precision assembling workbench
12U-shaped deflection light path 13, mirror mounting surface to be modified
Detailed Description
The advantages and features of the present invention will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings and detailed description of specific embodiments of the invention. It is to be noted that the drawings are in a very simplified form and are not to scale, which is intended merely for convenience and clarity in describing embodiments of the invention.
It should be noted that, for clarity of description of the present invention, various embodiments are specifically described to further illustrate different implementations of the present invention, wherein the embodiments are illustrative and not exhaustive. In addition, for simplicity of description, the contents mentioned in the previous embodiments are often omitted in the following embodiments, and therefore, the contents not mentioned in the following embodiments may be referred to the previous embodiments accordingly.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood that the inventors do not intend to limit the invention to the particular embodiments described, but intend to protect all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the claims. The same component numbers may be used throughout the drawings to refer to the same or like parts.
Referring to fig. 1 to 5, a U-shaped folded optical path adjusting device of the present invention includes: the square frame 6 comprises a U-shaped frame and a flat plate, the U-shaped frame is arranged on the lower surface of the flat plate, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame to form a measurement reference, and a first light through hole 111 and a second light through hole 112 are formed in the flat plate and used for repairing and matching an optical reference surface of the U-shaped folding optical system; the pentagon frame 10 is provided with an angle structure, and a plane of the pentagon frame is provided with a third light passing hole 113 for repairing a reflector installation surface of the U-shaped folding optical system. The first lens mounting surface 2, the second lens mounting surface 3, the first reflector mounting surface 4 and the second reflector mounting surface 5 are surfaces to be modified.
In one embodiment, the U-shaped frame and the flat plate are connected together by screws.
In one embodiment, the flatness of the lower surface of the flat plate and the bottom surface of the U-shaped frame is less than 0.002 mm.
In one embodiment, the angular machining error of the pentagonal frame is less than 1'.
In one embodiment, the five faces of the pentagonal frame are machined to a flatness of less than 0.002 mm.
The invention also provides a U-shaped folding optical path adjusting method, which comprises the following steps: step S101, connecting a square frame with a U-shaped folding optical system, enabling a reference surface of the U-shaped folding optical system to coincide with the lower surface of a flat plate of the square frame, and polishing lens mounting surfaces at two ends of the U-shaped folding optical system; step S102, connecting the pentagonal frame with a U-shaped folding optical system, and converting the mounting surfaces of the two reflectors into horizontal planes to complete the conversion of folding angles; and step S103, after the folding angle is converted, the reflector mounting surface is measured by matching with a dial indicator, the reflector mounting surface is repaired by using the measurement data, and the precision control of the folding optical path optical reflector mounting surface is finished.
In one embodiment, the connecting the square frame with the U-shaped folded optical system, the reference surface of the U-shaped folded optical system coinciding with the lower surface of the flat plate of the square frame, and polishing the lens mounting surfaces at the two ends of the U-shaped folded optical system includes: fixing a U-shaped folding optical system on a square frame flat plate, arranging a square frame on a first high-precision assembly workbench 8, enabling a reference surface of the U-shaped folding optical system to coincide with the lower surface of the flat plate, enabling the bottom surface of the square frame to coincide with the surface of the high-precision assembly workbench, arranging a dial indicator on the high-precision workbench, arranging a dial indicator needle on lens mounting surfaces at two ends of the U-shaped folding optical system, measuring parallelism between the lens mounting surfaces at the two ends and an optical reference surface, repairing and grinding the lens mounting surfaces at the two ends through measurement data, ensuring that the lens mounting surfaces at the two ends are parallel to the optical reference surface, and taking down the U-shaped folding optical system after repairing and grinding.
In one embodiment, the connecting the pentagonal frame with the U-shaped folding optical system to convert the two mirror mounting surfaces into a horizontal plane to complete the folding angle conversion includes: firstly, the pentagonal frame is connected with the U-shaped folding optical system, then the pentagonal frame is arranged on a second high-precision assembling workbench 11, through angle conversion of the pentagonal frame, the reference surface of the U-shaped folding optical system forms an angle of 45 degrees with the surface of the high-precision assembling workbench, and the reflector mounting surface of the U-shaped folding optical system is parallel to the surface of the high-precision assembling workbench.
In one embodiment, after the conversion of the refraction angle, the measurement of the mirror mounting surface is completed by matching with a dial indicator, and the mirror mounting surface is repaired by using the measurement data, so as to complete the precision control of the refraction optical path optical mirror mounting surface, including: the dial indicator is arranged on the high-precision workbench, the dial indicator needle is arranged on the U-shaped folding optical system reflector mounting surface, the parallelism between the reflector mounting surface and the high-precision workbench surface can be measured, the reflector mounting surface is repaired and ground through measurement data, the reflector mounting surface is guaranteed to be parallel to the high-precision workbench surface, and the reflector mounting surface and the reference surface of the U-shaped folding optical system form an angle of 45 degrees.
In one embodiment, the square frame comprises a U-shaped frame and a flat plate, the U-shaped frame and the flat plate are connected together through screws, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame, and the flatness of the lower surface of the flat plate is less than 0.002mm, so that a measuring benchmark is formed.
In one embodiment, the pentagonal shelf upper angles are respectively: the machining errors of the angles are less than 1' in 90 degrees, 135 degrees, 90 degrees and 135 degrees, and the machining flatness of the five faces of the pentagonal frame is less than 0.002 mm.
In one embodiment, the plane of the square frame and the plane of the pentagonal frame are provided with light through holes and mounting screw holes, so that the mounting of the structural member of the optical system can be met.
As a specific embodiment, referring to fig. 6, a method for adjusting a U-shaped folded optical system according to the present invention includes the following steps:
the first step is as follows: grinding lens mounting surfaces at two ends of U-shaped folding optical system
The U-shaped folding optical system is fixed on the square frame flat plate, the square frame is arranged on the high-precision assembly workbench, at the moment, the reference surface of the U-shaped folding optical system coincides with the lower surface of the flat plate, and the bottom surface of the square frame coincides with the surface of the high-precision assembly workbench. Because the lower surface of the flat plate is parallel to the bottom surface of the square frame, the reference surface of the U-shaped folding optical system is parallel to the surface of the first high-precision assembling workbench 8, the dial indicator is arranged on the high-precision workbench, the dial indicator needle is arranged on the lens mounting surfaces at two ends of the U-shaped folding optical system, the parallelism between the lens mounting surfaces at two ends and the optical reference surface can be measured, the lens mounting surfaces at two ends are repaired and ground through measuring data, the lens mounting surfaces at two ends are ensured to be parallel to the optical reference surface, and the U-shaped folding optical system is taken down after the repair and grinding.
The second step is that: angle conversion
Firstly, the pentagonal frame is connected with the U-shaped folding optical system, then the pentagonal frame is arranged on the second high-precision assembling workbench 11, at the moment, through angle conversion of the pentagonal frame, the reference surface of the U-shaped folding optical system forms an angle of 45 degrees with the surface of the high-precision assembling workbench, and the reflector mounting surface of the U-shaped folding optical system is parallel to the surface of the high-precision assembling workbench.
The third step: grinding type optical system two reflector installation surfaces
The dial indicator is arranged on the high-precision workbench, the dial indicator needle is arranged on the U-shaped folding optical system reflector mounting surface, the parallelism between the reflector mounting surface and the high-precision workbench surface can be measured, the reflector mounting surface is repaired and ground through measurement data, the reflector mounting surface is ensured to be parallel to the high-precision workbench surface, and the reflector mounting surface and the U-shaped folding optical system reference surface can be ensured to form an angle of 45 degrees.
The invention achieves the following significant beneficial effects:
the realization is simple, include: the square frame comprises a U-shaped frame and a flat plate, the U-shaped frame is arranged on the lower surface of the flat plate, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame to form a measuring reference, and a first light through hole and a second light through hole are formed in the flat plate and used for repairing and matching an optical reference surface of the U-shaped folding optical system; the pentagon frame is provided with an angle structure, and a plane of the pentagon frame is provided with a third light through hole for repairing and matching lens mounting surfaces at two ends of the U-shaped folding optical system. The real-time detection of the angle relation between the reflector installation surface and the reference surface is realized, the precision control of the installation surface of the optical element of the refraction optical path is completed, and the high-precision and high-efficiency installation and adjustment of the U-shaped refraction optical system are realized. The real-time detection of the angle relation between the reflector mounting surface and the reference surface is realized, the precision control of the mounting surface of the optical element of the folded optical path is completed, and the high-precision and high-efficiency installation and adjustment of the U-shaped folded optical system are realized.
It is to be understood that the above examples are illustrative only for the purpose of clarity of description and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (9)
1. A U-shaped folded optical path adjusting device is characterized by comprising:
the square frame comprises a U-shaped frame and a flat plate, the U-shaped frame is arranged on the lower surface of the flat plate, the lower surface of the flat plate is parallel to the bottom surface of the U-shaped frame to form a measuring reference, and a first light through hole and a second light through hole are formed in the flat plate and used for repairing and matching lens mounting surfaces at two ends of the U-shaped folding optical system;
the device comprises a pentagonal frame, a first light-passing hole, a second light-passing hole, a first reflector and a second reflector, wherein an angle structure is arranged on the pentagonal frame, and the first light-passing hole is formed in a plane shared by two right angles of the pentagonal frame and used for repairing and matching a reflector mounting surface of a U-shaped folding optical system;
the upper angles of the pentagonal frame are respectively as follows: 90 °, 135 °, 90 °, 135 °.
2. The U-turn optical path adjusting device of claim 1, wherein the U-shaped frame and the plate are connected together by screws.
3. The U-turn optical path tuning device of claim 1, wherein the flatness of the lower surface of the flat plate and the bottom surface of the U-shaped frame are both less than 0.002 mm.
4. The U-turn optical path adjusting device according to claim 1, wherein the angle machining error of the pentagonal frame is less than 1'.
5. The U-turn optical path adjusting device of claim 1, wherein the five faces of the pentagon frame are processed with flatness less than 0.002 mm.
6. A U-shaped folded optical path adjusting method is characterized by comprising the following steps:
connecting a square frame with a U-shaped folding optical system, wherein a reference surface of the U-shaped folding optical system is superposed with the lower surface of a flat plate of the square frame, and polishing lens mounting surfaces at two ends of the U-shaped folding optical system;
connecting the pentagonal frame with the U-shaped folding optical system, and converting the mounting surfaces of the two reflectors into horizontal planes to complete the conversion of the folding angle;
after the folding angle is converted, the reflector mounting surface is measured by matching with a dial indicator, the reflector mounting surface is repaired and matched by using measurement data, and the precision control of the folding light path optical reflector mounting surface is completed;
there is the angle structure on the pentagon frame, the angle is respectively: 90 °, 135 °, 90 °, 135 °.
7. The method according to claim 6, wherein the step of connecting the square frame to the U-fold optical system, the reference surface of the U-fold optical system coinciding with the lower surface of the flat plate of the square frame, and the step of polishing the lens mounting surfaces at both ends of the U-fold optical system comprises:
fixing a U-shaped folding optical system on a square frame flat plate, arranging a square frame on a high-precision assembly workbench, enabling a reference surface of the U-shaped folding optical system to coincide with the lower surface of the flat plate, enabling the bottom surface of the square frame to coincide with the surface of the high-precision assembly workbench, arranging a dial indicator on the high-precision workbench, arranging a dial indicator needle on lens mounting surfaces at two ends of the U-shaped folding optical system, measuring parallelism between the lens mounting surfaces at the two ends and the surface of the high-precision assembly workbench, repairing and grinding the lens mounting surfaces at the two ends through measurement data, ensuring that the lens mounting surfaces at the two ends are parallel to the surface of the high-precision assembly workbench, and taking down the U-shaped folding optical system after repairing and grinding.
8. The method for adjusting a U-folded optical path according to claim 7, wherein the step of connecting the pentagonal frame to the U-folded optical system to convert the two mirror mounting surfaces into a horizontal plane to perform the conversion of the folding angle comprises:
the method comprises the steps of firstly connecting a pentagonal frame with a U-shaped folding optical system, then arranging the pentagonal frame on a high-precision assembling workbench, forming an angle of 45 degrees between a reference surface of the U-shaped folding optical system and the surface of the high-precision assembling workbench through angle conversion of the pentagonal frame, and enabling a reflector mounting surface of the U-shaped folding optical system to be parallel to the surface of the high-precision assembling workbench.
9. The U-shaped folded optical path adjusting method according to claim 8, wherein after the folded angle is converted, the folded angle is matched with a dial indicator to complete the measurement of the reflector mounting surface, the reflector mounting surface is repaired by using measurement data, and the precision control of the folded optical path optical reflector mounting surface is completed, including:
the dial indicator is arranged on the high-precision workbench, the dial indicator needle is arranged on the U-shaped folding optical system reflector mounting surface, the parallelism between the reflector mounting surface and the high-precision workbench surface can be measured, the reflector mounting surface is repaired and ground through measurement data, the reflector mounting surface is guaranteed to be parallel to the high-precision workbench surface, and the reflector mounting surface and the reference surface of the U-shaped folding optical system form an angle of 45 degrees.
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| CN112230239B (en) * | 2020-07-31 | 2022-07-05 | 同济大学 | Monitoring device based on optical axis refraction and reflection |
| CN111880282B (en) * | 2020-07-31 | 2021-10-08 | 同济大学 | Coarse and fine adjusting device for large-range optical axis |
| CN115145020A (en) * | 2022-06-16 | 2022-10-04 | 北京遥感设备研究所 | Optical adjusting system and method for enabling laser propagation direction to be parallel to optical platform |
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