Reliably conductive space camera optical lens

Abstract

The utility model provides a reliable conductive optical lens of a space camera, which is used for solving the problems that the installation position and direction of an optical lens have high requirements and are inconvenient to adjust again due to the fact that a lead needs to penetrate out of an installation structure of the optical lens in the existing mode of leading out charges on an optical element; or the conductive stability is low. According to the reliable conductive space camera optical lens provided by the utility model, the projection is arranged on the optical lens frame at the foremost end, so that the projection is in contact with the conductive film on the front surface of the optical lens for electric conduction, and electric charges are transferred to the lens barrel through the optical lens frames and the conductive media on the front and rear end faces of the repairing and grinding space ring and are transferred out through the lens barrel. Compared with the existing mode of leading out the electric charges on the optical element, the optical lens and the mounting structure thereof can be in an equipotential state only through processing and surface treatment of the optical element, and reliable electric conduction is realized.

Description

Technical Field

[0001] The utility model relates to an optical lens of a space camera, in particular to an optical lens of a space camera with reliable electrical conduction. Background Technique

[0002] The orbital environment of a space camera is complex. High-energy charged particles in the orbit will form charges on the optical lens at the forefront of the space camera, and then cause damage due to the total dose effect. However, since the optical lens of the space camera and its installation structure generally cannot conduct electricity, it is necessary to design a suitable optomechanical structure to ensure that the surface of the optical lens and the installation structure are a complete electrically conductive structure to conduct the charges on the optical lens.

[0003] At present, there are mainly the following two ways to conduct the charges on the optical element: First, a conductive film is plated on the optical lens, and a wire is installed on the conductive film and connected to a conductive structure such as a grounding stake to conduct the charges on the optical element. Although this solution has a reliable conductive circuit, the implementation method is complex. It is necessary to pass the wire out of the installation structure of the optical lens, resulting in high requirements for the installation position and direction of the optical lens, and it is not convenient to adjust again after the optical lens is installed due to the presence of the wire. Second, a conductive film is plated on the optical lens, and then the surface of the optical lens is conductively connected to the installation structure through a retaining ring and a metal set screw. However, since the contact area of the tip of the metal set screw is small, the conductive stability is low. Content of the Utility Model

[0004] The purpose of the utility model is to solve the technical problems existing in the existing methods of conducting the charges on the optical element, that is, it is necessary to pass the wire out of the installation structure of the optical lens, resulting in high requirements for the installation position and direction of the optical lens and not being convenient to adjust again, or the conductive stability is low, and to provide an optical lens of a space camera with reliable electrical conduction.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] An optical lens of a space camera with reliable electrical conduction, including a lens barrel, N optical lens frames, N optical lenses and N lapping spacers, N≥3; the N optical lens frames are coaxially installed in the lens barrel in sequence from front to back, and the N optical lenses are respectively coaxially installed in the N optical lens frames; among them, N - 1 lapping spacers are respectively arranged between adjacent two optical lens frames, and the remaining one lapping spacer is arranged between the optical lens frame at the rearmost end and the lens barrel; the special feature is that: a conductive film is plated on the front surface of the optical lens at the forefront of the lens barrel among the N optical lenses;

[0007] A circular protrusion is circumferentially arranged at the position of the optical lens frame at the forefront of the lens barrel among the N optical lens frames facing the conductive film;

[0008] The protrusion is in contact with the conductive film;

[0009] The front and rear end faces of N optical frames are both conductive media;

[0010] The front and rear end faces of N lapping spacers are both conductive media;

[0011] The lens barrel is grounded.

[0012] Furthermore, the protrusion is in line contact or surface contact with the conductive film.

[0013] Furthermore, the front and rear end faces of N optical frames are both frame metal cut surfaces;

[0014] The front and rear end faces of N lapping spacers are both lapping spacer metal cut surfaces.

[0015] Furthermore, the front and rear end faces of N optical frames are both coated with conductive films;

[0016] The front and rear end faces of N lapping spacers are both coated with conductive films.

[0017] Furthermore, it further includes N lens retaining rings and a lens group retaining ring;

[0018] The N lens retaining rings are respectively arranged inside the corresponding optical frames and at the rear ends of the corresponding optical lenses, and are used to press each optical lens tightly inside the corresponding optical frame;

[0019] The lens group retaining ring is arranged inside the lens barrel and at the front end of the foremost optical frame, and is used to press the N optical frames tightly inside the lens barrel.

[0020] Furthermore, it further includes a plurality of screws, a plurality of washers and wires;

[0021] An installation flange is arranged on the lens barrel;

[0022] The screw rods of the plurality of screws sequentially pass through the corresponding washers and the installation holes on the installation flange to connect the installation flange with an external device;

[0023] One end of the wire is welded to any washer, and the other end is grounded.

[0024] The beneficial effects of the present utility model compared with the prior art are as follows:

[0025] The utility model provides a reliable conductive optical lens for a space camera. A protrusion is arranged on the front optical frame so that the protrusion contacts and conducts electricity with a conductive film on the front surface of the optical lens. Then, the charge is transferred to the lens barrel through the conductive medium on the front and rear end surfaces of each optical frame and the repaired spacer, and then transferred out through the lens barrel. Compared with the existing method of deriving the charge on the optical element, the utility model can make the optical lens and its mounting structure in a state of equipotential bodies only through the processing and surface treatment of the optical element itself, thereby achieving reliable conductivity. The utility model has a simple structure and is easy to assemble and adjust, and can be widely used in optical lenses of space cameras that need to be conductive. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a first embodiment of a reliable conductive space camera optical lens of the utility model;

[0027] Figure 2 This is a schematic diagram of the assembly of the front frame and the front lens in the first embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the assembly of the middle lens frame and the middle lens in the first embodiment of the present utility model;

[0029] Figure 4 It is a schematic diagram of the assembly of the rear end frame and the rear end lens in the first embodiment of the present utility model.

[0030] The specific reference numerals are as follows:

[0031] 1-lens barrel; 2-optical frame, 21-front end frame, 211-front end face, 212-rear end face, 22-middle frame, 23-rear end frame; 3-optical lens, 31-front end lens, 32-middle lens, 33-rear end lens; 4-grinding spacer; 5-lens pressure ring; 6-lens group pressure ring; 7-conductive film; 8-protrusion. DETAILED DESCRIPTION

[0032] In order to make the advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment 1

[0034] like Figure 1As shown in the figure, a reliable conductive space camera optical lens includes a lens barrel 1, three optical lens frames 2, three optical lenses 3, three lapping spacers 4, three lens retaining rings 5, and a lens group retaining ring 6. The three optical lens frames 2 are coaxially installed in the lens barrel 1 in sequence from front to back. In this embodiment, the three optical lens frames 2 are respectively denoted as the front lens frame 21, the middle lens frame 22, and the rear lens frame 23 according to the front-to-back order arranged in the lens barrel 1, and the corresponding three optical lenses 3 are respectively denoted as the front lens 31, the middle lens 32, and the rear lens 33. Then, as Figures 2 - 4 shown in the figure, the front lens 31 is coaxially installed in the front lens frame 21, the middle lens 32 is coaxially installed in the middle lens frame 22, and the rear lens 33 is coaxially installed in the rear lens frame 23.

[0035] The first lapping spacer 4 is arranged between the rear end face of the front lens frame 21 and the front end face of the middle lens frame 22, and is used to adjust the distance and pose between the front lens frame 21 and the middle lens frame 22. The second lapping spacer 4 is arranged between the rear end face of the middle lens frame 22 and the front end face of the rear lens frame 23, and is used to adjust the distance and pose between the middle lens frame 22 and the rear lens frame 23. The third lapping spacer 4 is arranged between the rear end face of the rear lens frame 23 and the lens barrel 1, and is used to adjust the distance and pose between the rear lens frame 23 and the lens barrel 1.

[0036] The three lens retaining rings 5 are respectively arranged in the corresponding optical lens frames 2. The lens retaining ring 5 in the front lens frame 21 is located at the rear end of the front lens 31. The lens retaining ring 5 in the middle lens frame 22 is located at the front end of the middle lens 32. The lens retaining ring 5 in the rear lens frame 23 is located at the rear end of the rear lens 33. In other embodiments of the present invention, except that the lens retaining ring 5 in the front lens frame 21 needs to be located at the rear end of the front lens 31, the remaining lens retaining rings 5 can be located at the front end of the corresponding optical lens 3 or at the rear end of the corresponding optical lens 3. The lens group retaining ring 6 is arranged in the lens barrel 1 and is located at the front end of the front lens frame 21, and is used to press the front lens frame 21, the middle lens frame 22, and the rear lens frame 23 tightly in the lens barrel 1.

[0037] A conductive film 7 is plated on the front surface of the front lens 31. A circular protrusion 8 is circumferentially arranged at the position of the front lens frame 21 facing the front surface of the corresponding optical lens. There is a line contact between the protrusion 8 and the conductive film 7 on the front surface of the front lens 31. When external high-energy charged particles form charges on the conductive film 7 on the front surface of the front lens 31, the protrusion 8 and the conductive film 7 on the front surface of the front lens 31 are in a conductive state, and the charges on the conductive film 7 can be transferred to the protrusion 8. Since the protrusion 8 and the front lens frame 21 are integrally arranged, the charges on the protrusion 8 are then connected and transferred to the front lens frame 21.

[0038] The front end faces and rear end faces of the front frame 21, the middle frame 22, and the rear frame 23 are all conductive media. At the same time, the front end faces and rear end faces of the four grinding spacers 4 are also conductive media, which are used to achieve the conductive function. Since the surfaces of the optical frame 2 and the grinding spacers 4 are usually non-conductive, but their main materials may be some conductive metal materials, such as TC4, aluminum alloy, brass, etc., so usually a surface blackening treatment is carried out on the surfaces of the optical frame 2 and the grinding spacers 4 to form a conductive oxide layer. Therefore, in this embodiment, the front end faces and rear end faces of the optical frame 2 and the grinding spacers 4 are cut. At this time, the corresponding conductive oxide layers on the front end faces and rear end faces of the optical frame 2 and the grinding spacers 4 are cut off, exposing the corresponding metal cut surfaces, and conducting electricity through the metal cut surfaces of the frame and the metal cut surfaces of the grinding spacers. As Figure 2 shown, the front end face 211 and the rear end face 212 of the front frame 21 are respectively set as the metal cut surfaces of the frame. In other embodiments of the present invention, a conductive film may also be directly provided on the front end faces and rear end faces of the optical frame 2 and the grinding spacers 4 to conduct electricity through the conductive film.

[0039] Since the front end face of the front frame 21 contacts the lens group retaining ring 6, and the lens group retaining ring 6 cannot conduct electricity, the charge transferred to the front frame 21 is transferred to the rear end face of the front frame 21, and the charge is transferred to the middle frame 22 through the first grinding spacer 4, and then transferred to the rear frame 23 through the second grinding spacer 4, and finally transferred to the lens barrel 1 through the third grinding spacer 4.

[0040] The lens barrel 1 is grounded. Specifically, in this embodiment, it also includes six screws, six gaskets, and a wire; an installation flange is provided on the lens barrel 1. The screw rods of the six screws sequentially pass through the corresponding gaskets and the installation holes on the installation flange to connect the installation flange with external equipment. One end of the wire is welded to any one of the six gaskets, and the other end is connected to a grounding stake.

[0041] An installation flange is provided on the lens barrel 1. When the lens barrel 1 is externally installed, the installation screw and the installation flange are pressed in the installation hole through a wire with a gasket to transfer the charge on the lens barrel 1 to the required position.

[0042] Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is only that in this embodiment, the contact between the protrusion 8 and the conductive film 7 on the front surface of the front lens 31 is a surface contact, and the charge on the conductive film 7 is transferred to the protrusion 8 through the surface contact.

[0044] The above description is only used to illustrate the technical solution of the present utility model, rather than to limit it. For those of ordinary skill in the art, the specific technical solution recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution protected by the present utility model.

Claims

1. A reliable conductive optical lens for a space camera, comprising a lens barrel (1), N optical lens frames (2), N optical lenses (3), and N lapping spacers (4), where N≥3; the N optical lens frames (2) are coaxially installed in the lens barrel (1) in sequence from front to back, and the N optical lenses (3) are respectively coaxially installed in the N optical lens frames (2); among them, N - 1 lapping spacers (4) are respectively arranged between adjacent two optical lens frames (2), and the remaining one lapping spacer (4) is arranged between the optical lens frame (2) at the rearmost end and the lens barrel (1). Characterized in that: On the front surface of the optical lens (3) at the foremost end of the lens barrel (1) among the N optical lenses (3), a conductive film (7) is plated. On the position of the optical lens frame (2) at the foremost end of the lens barrel (1) among the N optical lens frames (2) facing the conductive film (7), a ring of protrusions (8) is circumferentially arranged. The protrusion (8) is in contact with the conductive film (7). The front end faces and rear end faces of the N optical lens frames (2) are both conductive media. The front end faces and rear end faces of the N lapping spacers (4) are both conductive media. The lens barrel (1) is grounded.

2. A reliable conductive optical lens for a space camera according to claim 1, characterized in that: The protrusion (8) is in line contact or surface contact with the conductive film (7).

3. A reliable conductive optical lens for a space camera according to claim 2, characterized in that: The front end faces and rear end faces of the N optical lens frames (2) are both frame metal cut surfaces. The front end faces and rear end faces of the N lapping spacers (4) are both lapping spacer metal cut surfaces.

4. A reliable conductive optical lens for a space camera according to claim 2, characterized in that: The front end faces and rear end faces of the N optical lens frames (2) are both plated with conductive films. The front end faces and rear end faces of the N lapping spacers (4) are both plated with conductive films.

5. A reliable conductive optical lens for a space camera according to any one of claims 1 - 4, characterized in that: It further includes N lens retaining rings (5) and a lens group retaining ring (6); The N lens retaining rings (5) are respectively arranged in the corresponding optical lens frames (2), the lens retaining ring (5) in the foremost optical lens frame (2) is located at the rear of the foremost optical lens (3), and the remaining lens retaining rings (5) are located at the front or rear of the corresponding optical lenses (3), for pressing each optical lens (3) tightly in the corresponding optical lens frame (2); The lens group retaining ring (6) is arranged in the lens barrel (1) and is located at the front of the foremost optical lens frame (2), for pressing the N optical lens frames (2) tightly in the lens barrel (1).

6. A reliable conductive optical lens for a space camera according to claim 5, characterized in that: It further includes a plurality of screws, a plurality of washers, and wires; An installation flange is provided on the lens barrel (1); The screw rods of the plurality of screws sequentially pass through the corresponding washers and the installation holes on the installation flange to connect the installation flange with an external device; One end of the wire is welded to any washer, and the other end is grounded.

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