Double-reflex light path imaging system and installation and adjustment method thereof

Abstract

The invention relates to the technical field of optics, in particular to a double-reflex light path imaging system and an installation and adjustment method thereof. The system comprises a front lens group, a first reflector group, a middle lens group, a second reflector group and a rear lens group, wherein an included angle between the first reflector group and the optical axis of the front lens group is a preset angle; the included angle between the middle mirror group and the optical axis of the first reflector group is a preset angle, and the plane where the middle mirror group is located is perpendicular to the plane where the front mirror group is located. The included angle between the second reflector group and the optical axis of the middle reflector group is a preset angle, and the plane where the second reflector group is located is parallel to the plane where the first reflector group is located; the included angle between the rear mirror set and the optical axis of the second reflector set is a preset angle, and the plane where the rear mirror set is located is perpendicular to the plane where the middle mirror set is located. According to the invention, by using the flexible adhesive, the flexible fixation of the reflector in the installation and adjustment process is realized, and the influence of stress on the surface type of the reflector in the installation and adjustment process is avoided.

Description

Technical Field

[0001] The invention relates to the field of optical technology, and in particular to a double-reflecting optical path imaging system and an installation and adjustment method thereof. Background Art

[0002] Reflectors play a very important role in optical systems, whether used alone or in combination. In common folding optical path imaging optical systems, by inserting reflectors, the optical system can be folded into a given shape or packaging size. In the folding optical path imaging system using dual reflectors, the two reflectors are arranged at a 45° angle to the optical axis, and the two reflectors are placed in parallel, so that the imaging system can achieve translation of the optical axis. The dual-reflecting folding optical path imaging system is suitable for some imaging environments with small spatial dimensions and complex imaging, such as aerospace imaging and biomedical imaging with limited payload and size. Imaging optical systems that use dual reflectors to achieve optical path folding often require precise adjustment of the spatial position and angle of the reflector. The fixing method of the reflector and the uneven stress during the debugging process can cause deformation of the reflective surface of the reflector. The system characteristics of the dual reflectors cause this error to be magnified multiple times, which greatly affects the imaging quality of the system.

[0003] The methods for fixing miniature reflectors in the prior art include: a flexible fixing method using a spring clip or an elastic pressure plate to press the reflector, and the reflective surface is pressed against a polished coplanar pad by the spring clip or the elastic pressure plate, thereby fixing the reflector. This fixing method cannot avoid the deformation of the reflective surface due to the bending moment applied to the reflector by the spring clip or the elastic pressure plate, thereby affecting the imaging; the tightening method using a pressure ring to press the reflector cannot avoid the stress deformation of the reflective surface due to the pre-tightening force applied to the reflector, thereby affecting the imaging. The method of fixing with adhesive is more common, but this fixing method cannot eliminate the deformation of the reflective surface due to stress conduction during the installation and adjustment of the reflector, thereby affecting the imaging. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a double-reflective optical path imaging system and an installation and adjustment method thereof. The present invention can effectively avoid the deformation of the reflecting surface caused by stress conduction during the installation and adjustment process. At the same time, the way of fixing the reflector is firm, and the reflecting surface does not deform after fixing, and it has strong adaptability to environments such as impact and vibration.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a double-reflection optical path imaging system, comprising:

[0006] front lens assembly; and,

[0007] A first reflector assembly, which is arranged to have a preset angle with the optical axis of the front mirror assembly;

[0008] A middle mirror group, which is arranged to have a preset angle with the optical axis of the first reflector group, and the plane where the middle mirror group is located is arranged perpendicular to the plane where the front mirror group is located;

[0009] A second reflector group, which is arranged to have a preset angle with the optical axis of the middle reflector group, and a plane where the second reflector group is located is arranged parallel to a plane where the first reflector group is located;

[0010] The rear mirror group is arranged to have a preset angle with the optical axis of the second reflector group, and the plane where the rear mirror group is located is perpendicular to the plane where the middle mirror group is located.

[0011] In an embodiment of the present invention, the preset angle is 45°.

[0012] In one embodiment of the present invention, the first reflector group and the second reflector group have the same structure, and the first reflector group includes:

[0013] a reflector; and,

[0014] A reflector seat, used for fixing the reflector, and the reflector is arranged on the front surface of the reflector seat;

[0015] A sealing material is disposed between the reflector and the reflector seat.

[0016] In one embodiment of the present invention, a groove is provided in the middle of the reflector seat, the groove is used to place the reflector, and gaps are reserved between the side surfaces of the groove and the side surfaces of the reflector, and the gaps are used to fill the sealing material.

[0017] In one embodiment of the present invention, circular through holes are arranged at the four corners of the reflector seat.

[0018] In one embodiment of the present invention, a group of evenly distributed circular injection holes are provided at the bottom of the groove, and the size formula of the injection holes is:

[0019]

[0020] Wherein, W is the weight of the reflector, a is the limiting acceleration coefficient of the working environment of the imaging system, f is the safety factor, and J is the shear strength of the adhesive.

[0021] In one embodiment of the present invention, the sealing material is a flexible adhesive 1601 sealing putty.

[0022] In one embodiment of the present invention, the reflector is a rectangular parallelepiped flat plate of a quartz substrate, and the front surface of the reflector is a reflective surface.

[0023] In one embodiment of the present invention, the size of the reflective surface is set to 22 mm×20 mm.

[0024] The present invention also provides an installation and adjustment method for a double-reflecting optical path imaging system, including the above-mentioned double-reflecting optical path imaging system, and the installation and adjustment method includes:

[0025] S1. Before adjusting the spatial position and angle of the reflector, use a sealing material to fit and fix the back of the reflector to the bottom of the groove, so as to achieve flexible bonding and fixing of the reflector to the reflector seat;

[0026] S2, using an online monitoring optical device to monitor the spatial position of the first reflector assembly, filing the contact surface of the reflector seat to make the first reflector assembly at a designed spatial position and angle, and tightening the screws to fix the reflector seat;

[0027] S3, injecting adhesive into the glue injection hole of the reflector seat, and finally completing the spatial position and angle adjustment of the first reflector group after curing;

[0028] Repeat steps S1 to S3 to complete the spatial position and angle adjustment of the second reflector assembly.

[0029] As described above, the double-reflection optical path imaging system and the installation and adjustment method thereof of the present invention have the following beneficial effects:

[0030] (1) The double-reflection optical path imaging system of the present invention comprises a front mirror group, a first reflector group, a middle mirror group, a second reflector group, and a rear mirror group. The present invention uses a flexible adhesive to achieve flexible fixation of the reflector during installation and adjustment, thereby avoiding the influence of stress on the reflective surface during the installation and adjustment process.

[0031] (2) The dual-reflection optical path imaging system of the present invention reduces the influence of the reflector's own gravity, bonding deformation, etc. on the reflective surface by controlling the size of the reflector and the bonding area while meeting the system's use requirements.

[0032] (3) The installation and adjustment method of the double-reflection optical path imaging system of the present invention is simple and easy to operate, and has strong resistance to impact and vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A structural diagram of a double-reflective optical path imaging system provided in an embodiment of the present application.

[0034] Figure 2 This is a front view structural diagram of a first reflector group of a double-reflecting optical path imaging system provided in an embodiment of the present application.

[0035] Figure 3This is a rear view structural diagram of a first reflector group of a double-reflecting optical path imaging system provided in an embodiment of the present application.

[0036] Figure 4 A cross-sectional structural diagram of a first reflector group of a double-reflecting optical path imaging system provided in an embodiment of the present application.

[0037] Figure 5 A workflow diagram of an installation and adjustment method for a double-reflective optical path imaging system provided in an embodiment of the present application.

[0038] Component number description

[0039] 1 Front lens group

[0040] 2. First reflector group

[0041] 3. Medium lens group

[0042] 4 Second reflector group

[0043] 5 Rear mirror set

[0044] 6 Sealing materials

[0045] 211 Reflective surface

[0046] 221 Groove

[0047] 222 Glue injection hole DETAILED DESCRIPTION

[0048] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0049] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0050] Terms such as first or second can be used to describe various components, but these components are not limited by the above terms. The above terms are used to distinguish one component from another component, for example, without departing from the scope of the concept according to the present disclosure, a first component can be referred to as a second component, and similarly, a second component can be referred to as a first component.

[0051] In addition, "connected / coupled" means that one component is directly electrically coupled to another component or is indirectly electrically coupled through another component. The singular form may include the plural form unless explicitly stated in the sentence. In addition, "include / comprise" or "includes / comprises" used in this specification indicates that one or more components, steps, operations, and elements exist or have been added. The specific structural or functional descriptions of the examples of the implementation of the concepts disclosed in this specification are only illustrated to describe the examples of the implementation of the concepts, and the examples of the implementation of the concepts can be implemented in various forms, but these descriptions are not limited to the examples of the implementation described in this specification.

[0052] According to the concept, various modifications and changes can be applied to the examples of the embodiments, so that the examples of the embodiments will be illustrated in the drawings and described in the specification. However, the examples of the embodiments according to the concept are not limited to the specific embodiments, but include all changes, equivalents or replacements included in the spirit and technical scope of the present disclosure.

[0053] It should be understood that when an element is described as being "coupled" or "connected" to another element, the element may be directly coupled or directly connected to the other element, or may be coupled or connected to the other element through a third element. Conversely, it should be understood that when an element is referred to as being "directly coupled to" or "directly coupled to" another element, no other element is placed between them. Other expressions describing the relationship between components (i.e., "between" and "directly between" or "adjacent to" and "directly adjacent to") need to be interpreted in the same manner.

[0054] The terms used in this specification are only used to describe specific examples of the embodiments and are not intended to limit the present disclosure. If there is no clear opposite meaning in the context, the singular form may include the plural form. In this specification, it should be understood that the term "including" or "having" indicates the presence of the features, quantities, steps, operations, components, parts or combinations thereof described in the specification, but the possibility of the presence or addition of one or more other features, quantities, steps, operations, components, parts or combinations thereof cannot be precluded.

[0055] If there is no contrary definition, all terms (including technical terms or scientific terms) used herein have the same meaning as those generally understood by ordinary technicians in the field. If the terms defined in the commonly used dictionary are not clearly defined in this specification, they should be interpreted as having the same meaning as in the context of the relevant technology, and not interpreted as ideal or overly formal meanings.

[0056] Descriptions of well-known components and processing techniques may be omitted so as not to unnecessarily obscure the embodiments of the disclosure.

[0057] Throughout the specification, the same reference numerals refer to the same elements. Thus, even if a reference numeral is not mentioned or described with reference to one figure, it may be mentioned or described with reference to another figure. Furthermore, even if a reference numeral is not shown in one figure, it may be mentioned or described with reference to another figure.

[0058] In addition, the logic level of the signal may be different or opposite to the described logic level. For example, a signal described as having a logic "high" level may alternatively have a logic "low" level, and a signal described as having a logic "low" level may alternatively have a logic "high" level.

[0059] The following will describe the various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present disclosure, many technical details are provided in order to enable the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can be implemented.

[0060] See also Figure 1 , Figure 1 A structural diagram of a double-reflection optical path imaging system provided in an embodiment of the present application. The present invention provides a double-reflection optical path imaging system, comprising a front mirror group 1, a first reflector group 2, a middle mirror group 3, a second reflector group 4, and a rear mirror group 5, wherein the first reflector group 2 is set to have a preset angle with the optical axis of the front mirror group 1; the middle mirror group 3 is set to have a preset angle with the optical axis of the first reflector group 2, and the plane where the middle mirror group 3 is located is perpendicular to the plane where the front mirror group 1 is located; the second reflector group 4 is set to have a preset angle with the optical axis of the middle mirror group 3, and the plane where the second reflector group 4 is located is parallel to the plane where the first reflector group 2 is located; the rear mirror group 5 is set to have a preset angle with the optical axis of the second reflector group 4, and the plane where the rear mirror group 5 is located is perpendicular to the plane where the middle mirror group 3 is located.

[0061] The double-reflection optical path imaging system of the present invention can effectively avoid deformation of the reflective surface caused by stress conduction during the installation and adjustment process; at the same time, the reflector is fixed firmly, the reflective surface does not deform after fixation, and has strong environmental adaptability such as impact vibration.

[0062] Specifically, the preset angle is 45°.

[0063] In one embodiment of the present invention, the present invention provides a double-reflection optical path imaging system, comprising a front mirror group 1, a first reflector group 2, a middle mirror group 3, a second reflector group 4, and a rear mirror group 5, wherein the first reflector group 2 is arranged at an angle of 45° with the optical axis of the front mirror group 1; the middle mirror group 3 is arranged at an angle of 45° with the optical axis of the first reflector group 2, and the plane where the middle mirror group 3 is located is arranged perpendicular to the plane where the front mirror group 1 is located; the second reflector group 4 is arranged at an angle of 45° with the optical axis of the middle mirror group 3, and the plane where the second reflector group 4 is located is arranged parallel to the plane where the first reflector group 2 is located; the rear mirror group 5 is arranged at an angle of 45° with the optical axis of the second reflector group 4, and the plane where the rear mirror group 5 is located is arranged perpendicular to the plane where the middle mirror group 3 is located, thereby realizing the translation and refraction of the system optical path.

[0064] See also Figure 2 , Figure 3 , Figure 4 , Figure 2 This is a front view structural diagram of a first reflector group of a double-reflecting optical path imaging system provided in an embodiment of the present application. Figure 3 This is a rear view structural diagram of a first reflector group of a double-reflecting optical path imaging system provided in an embodiment of the present application. Figure 4 A cross-sectional structural diagram of a first reflector group of a double-reflection optical path imaging system provided in an embodiment of the present application. The first reflector group 2 has the same structure as the second reflector group 4, and the first reflector group 2 includes a reflector 21, a reflector seat 22, and a sealing material 6. The reflector seat 22 is used to fix the reflector 21, and the reflector 21 is arranged on the front surface of the reflector seat 22; the sealing material 6 is arranged between the reflector 21 and the reflector seat 22.

[0065] Specifically, the sealing material 6 is made of a flexible adhesive 1601 sealing putty.

[0066] Specifically, the reflector 21 is a rectangular parallelepiped flat plate made of a quartz substrate, and the front surface of the reflector 21 is a reflective surface 211 .

[0067] Specifically, the size of the reflective surface 211 is set to 22 mm×20 mm.

[0068] In one embodiment of the present invention, the reflector 21 is a rectangular flat plate of a quartz substrate, and its front surface is a reflective surface 211. Combined with the size restrictions of the system application, the size of the reflective surface 211 can be set to 22mm×20mm. In order to prevent the reflective surface from being deformed by factors such as installation stress, acceleration of the use environment, shrinkage of the adhesive during curing, and slight expansion or contraction of the reflector seat under high and low temperature conditions, the ratio of the maximum end face size to the thickness of the reflector 21 is less than 6:1, so the thickness size is set to 4mm.

[0069] Specifically, a groove 221 is provided in the middle of the reflector seat 22 , and the groove 221 is used to place the reflector 21 . A gap is reserved between the side of the groove 221 and the side of the reflector 21 , and the gap is used to fill the sealing material 6 .

[0070] Specifically, a group of evenly distributed circular glue injection holes 222 are provided at the bottom of the groove 221, and the size formula of the glue injection holes 222 is:

[0071]

[0072] Wherein, W is the weight of the reflector, a is the limiting acceleration coefficient of the working environment of the imaging system, f is the safety factor, and J is the shear strength of the adhesive.

[0073] In one embodiment of the present invention, the reflector seat 22 is a rectangular metal plate with a groove 221 in the middle for centrally placing the reflector 21. Gaps are reserved between the groove 221 and the side of the reflector 21 for filling the flexible adhesive 1601 sealing putty. A group of circular through holes are evenly distributed at the four corners, and the screws passing through the group of through holes are tightened to fix the first reflector group 2; a group of evenly distributed circular glue injection holes 222 are set at the bottom of the groove 221.

[0074] See also Figure 5 , Figure 5 The present invention also provides a method for installing and adjusting a double-reflecting optical path imaging system, including the above-mentioned double-reflecting optical path imaging system, and the installation and adjustment method includes:

[0075] S1. Before adjusting the spatial position and angle of the reflector 21, the back side of the reflector 21 is fitted and fixed to the bottom of the groove 221 by using a sealing material 6, so as to achieve flexible bonding and fixing of the reflector 21 and the reflector seat 22;

[0076] S2, using an online monitoring optical device to monitor the spatial position of the first reflector assembly 2, filing the contact surface of the reflector seat 22 to make the first reflector assembly 2 at the designed spatial position and angle, and tightening the screws to fix the reflector seat 22;

[0077] S3, injecting adhesive into the glue injection hole 222 of the reflector seat, and finally completing the spatial position and angle adjustment of the first reflector group 2 after curing;

[0078] S4, repeating steps S1 to S3 to complete the spatial position and angle adjustment of the second reflector assembly 4.

[0079] The installation and adjustment method of the double-reflection optical path imaging system of the present invention completes the adjustment and fixation of the spatial position and angle of the reflector of the double-reflection optical path imaging system without affecting the surface shape of the reflective surface.

[0080] In summary, the double-reflection optical path imaging system of the present invention comprises a front mirror group, a first reflector group, a middle mirror group, a second reflector group, and a rear mirror group. The present invention uses a flexible adhesive to achieve flexible fixation during the installation and adjustment of the reflector, thereby avoiding the influence of stress on the reflective surface during the installation and adjustment. The double-reflection optical path imaging system of the present invention controls the size of the reflector and the bonding area, thereby reducing the influence of the reflector's own gravity, bonding deformation, etc. on the reflective surface while meeting the system's use requirements. The installation and adjustment method of the double-reflection optical path imaging system of the present invention is simple and easy to operate, and has strong resistance to impact and vibration.

[0081] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A double-reflection optical path imaging system, characterized in that: include: Front lens group (1); as well as, A first reflector group (2) which is arranged to have a preset angle with the optical axis of the front reflector group (1); A middle mirror group (3) is arranged such that the included angle between the middle mirror group (3) and the optical axis of the first reflector group (2) is a preset angle, and the plane where the middle mirror group (3) is located is arranged perpendicular to the plane where the front mirror group (1) is located; A second reflector group (4) is arranged such that the angle between the second reflector group (4) and the optical axis of the middle reflector group (3) is a preset angle, and the plane where the second reflector group (4) is located is arranged parallel to the plane where the first reflector group (2) is located; The rear mirror group (5) is arranged to have a preset angle with the optical axis of the second reflector group (4), and the plane where the rear mirror group (5) is located is arranged perpendicular to the plane where the middle mirror group (3) is located.

2. A double-reflection optical path imaging system according to claim 1, characterized in that: The preset angle is 45°.

3. A double-reflection optical path imaging system according to claim 1 or 2, characterized in that: The first reflector group (2) and the second reflector group (4) have the same structure, and the first reflector group (2) comprises: a reflector (21); and A reflector seat (22) for fixing the reflector (21), wherein the reflector (21) is arranged on the front surface of the reflector seat (22); A sealing material (6) is arranged between the reflector (21) and the reflector seat (22).

4. The double-reflection optical path imaging system according to claim 3, characterized in that: A groove (221) is provided in the middle of the reflector seat (22), the groove (221) being used to place the reflector (21), and a gap is reserved between the side surface of the groove (221) and the side surface of the reflector (21), the gap being used to fill the sealing material (6).

5. The double-reflection optical path imaging system according to claim 4, characterized in that: Circular through holes are arranged at the four corners of the reflector seat (22).

6. The double-reflection optical path imaging system according to claim 4, characterized in that: A group of evenly distributed circular glue injection holes (222) are provided at the bottom of the groove (221), and the size formula of the glue injection holes (222) is: Wherein, W is the weight of the reflector, a is the limiting acceleration coefficient of the working environment of the imaging system, f is the safety factor, and J is the shear strength of the adhesive.

7. The double-reflection optical path imaging system according to claim 4, characterized in that: The material of the sealing material (6) is a flexible adhesive 1601 sealing putty.

8. The double-reflection optical path imaging system according to claim 4, characterized in that: The reflector (21) is a rectangular parallelepiped flat plate made of a quartz substrate, and the front surface of the reflector (21) is a reflective surface (211).

9. The double-reflection optical path imaging system according to claim 8, characterized in that: The size of the reflecting surface (211) is set to 22 mm×20 mm.

10. A method for installing and adjusting a double-reflecting optical path imaging system, characterized in that: The double-reflecting optical path imaging system comprising any one of claims 1 to 9, wherein the installation and adjustment method comprises: S1. Before adjusting the spatial position and angle of the reflector (21), using a sealing material (6) to fit and fix the back side of the reflector (21) to the bottom of the groove (221), so as to achieve flexible bonding and fixing of the reflector (21) to the reflector seat (22); S2, using an online monitoring optical device to monitor the spatial position of the first reflector group (2), filing the contact surface of the reflector seat (22) to make the first reflector group (2) be in a designed spatial position and angle, and tightening the screws to fix the reflector seat (22); S3, injecting adhesive into the glue injection hole (222) of the reflector seat, and finally completing the spatial position and angle adjustment of the first reflector group (2) after curing; Repeat steps S1 to S3 to complete the spatial position and angle adjustment of the second reflector assembly (4).

Images