Multiple adjusting night vision lens for optical experiment

Abstract

The utility model discloses a multiple adjustment night vision lens for optical experiments, which belongs to the field of optics and comprises a low-light night vision device composed of an objective lens, an image intensifier and an eyepiece, the objective lens is connected with the eyepiece through a connecting tube, and the image intensifier is located inside the connecting tube. Compared with the prior art, the utility model has the advantages that the distance between the objective lens and the image intensifier is adjusted through the engagement connection of the displacement thread at the outer wall end of the objective lens and the translation screw at the output end of the brushless motor, and the brushless motor is controlled by the remote control system; in this way, the angle needing to be rotated can be rapidly determined according to the displacement data of the displacement thread of the objective lens, and rapid rotation is completed through the brushless motor, so that the adjustment data of the magnification of the objective lens is greatly increased.

Description

Technical Field

[0001] This utility model relates to the field of optics, specifically to a night vision lens with adjustable magnification for optical experiments. Background Technology

[0002] In order to observe the surrounding environment at night, scientists have invented night vision devices that can see the surrounding environment clearly at night by utilizing the properties of photoelectric effect. The lenses used in these night vision devices are usually adjustable night vision lenses.

[0003] Existing low-light night vision lenses mainly consist of an objective lens, an image intensifier, an eyepiece, and a connecting tube that connects the objective lens and the eyepiece. The image intensifier is located inside the storage slot of the connecting tube. To ensure the lens's airtightness, the storage slot is sealed with a sealing plate. To facilitate the adjustment of the lens magnification, the connection between the objective lens and the connecting tube is usually designed with a threaded structure. The focal length between the objective lens and the image intensifier is adjusted by rotating the nut inside the objective lens, thereby adjusting the magnification.

[0004] When this adjustment method is applied to items such as telescopes, manual adjustment will not cause too much impact. However, when applied to various experiments, every scale displacement of the night vision lens will have a significant impact on the detected data. Manually adjusting the focal length of the objective lens will more or less result in some deviation. If you want to adjust it to a suitable magnification, multiple adjustment mechanisms with different adjustment rates are required, making it difficult to quickly adjust the lens magnification to meet the experimental requirements. Utility Model Content

[0005] The technical problem this invention aims to solve is that the focal length of the objective lens of existing optical experimental night vision lenses with adjustable magnification is usually manually adjusted, and the accuracy of manual adjustment is low, making it difficult to quickly meet the needs of the laboratory.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: an optical experimental night vision lens with adjustable magnification, comprising a low-light night vision device composed of an objective lens, an image intensifier and an eyepiece, wherein the objective lens is connected to the eyepiece through a connecting tube, and the image intensifier is located inside the connecting tube, a storage slot for placing the image intensifier is provided on one side of the connecting tube, and a closed plate connected by bolts is provided above the storage slot.

[0007] An L-shaped fixing block is welded above the sealing plate. The outer wall end of the objective lens has a displacement thread. A translation screw is provided above the displacement thread and engages with it. The displacement thread moves back and forth along the direction of the connecting pipe. A brushless motor that drives the translation screw is provided at the vertical end of the L-shaped fixing block.

[0008] The L-shaped fixing block has a USB interface for connecting to the data adjustment system, and the brushless motor is driven by an external system connected through the USB interface.

[0009] As an improvement, the objective lens has a protective groove above the displacement thread to protect the translation screw and the displacement thread, and rubber gaskets to prevent dust contamination are attached to the upper and lower ends of the opening of the protective groove.

[0010] As an improvement, limiting strips for fixing the image intensifier are provided on both sides of the storage groove of the connecting tube.

[0011] As an improvement, the image intensifier consists of a photocathode, an electron lens, a microchannel plate, an anti-ion feedback membrane, and a fluorescent screen.

[0012] As an improvement, the flat end of the L-shaped fixing block is provided with a removable battery for powering the image intensifier.

[0013] As an improvement, both the eyepiece and the objective lens are detachable, and both are slidably connected to the two sides of the connecting tube.

[0014] The advantages of this invention compared to the prior art are as follows: This device adjusts the distance between the objective lens and the image intensifier by engaging the displacement thread on the outer wall of the objective lens with the translation screw at the output end of the brushless motor. The brushless motor is controlled by a remote control system. This method can quickly determine the required rotation angle based on the displacement data of the objective lens's displacement thread and complete the rotation quickly by the brushless motor, thereby greatly increasing the adjustment range of the objective lens magnification. Attached Figure Description

[0015] Figure 1 This is a general structural diagram of an optical experimental night vision lens with adjustable magnification.

[0016] Figure 2 This is a cross-sectional view of the overall structure of an optical experimental night vision lens with adjustable magnification according to this utility model.

[0017] Figure 3 This is an exploded view of the overall structure of an optical experimental night vision lens with adjustable magnification, according to this utility model.

[0018] Figure 4 yes Figure 3 Enlarged view of point A.

[0019] As shown in the figure: 1. Low-light night vision device; 11. Objective lens; 111. Protective groove; 112. Rubber gasket; 12. Image intensifier; 121. Limiting strip; 122. Removable battery; 13. Eyepiece; 14. Connecting tube; 15. Storage groove; 16. Sealing plate; 161. L-shaped fixing block; 2. Displacement thread; 21. Translation screw; 22. Brushless motor; 3. USB interface. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] As per the instruction manual Figure 1 , 2 As shown in Figures 3 and 4, existing night vision devices are mainly divided into infrared night vision devices, low-light night vision devices 1, and thermal imaging night vision devices. The low-light night vision device 1 mainly consists of an objective lens 11, an image intensifier 12, and an eyepiece 13. The image intensifier 12 is composed of a photocathode, an electron lens, a microchannel plate, an anti-ion feedback membrane, and a fluorescent screen. (The photocathode is one of the key components of the image intensifier; it converts the optical image projected onto it into photoelectrons, the distribution of which corresponds to the illuminance distribution of the original light image. The electron lens is used to focus and accelerate the photoelectrons; the electron lens can be electrostatic or magnetic, ensuring that the photoelectrons are accurately projected onto the fluorescent screen. The microchannel plate enhances the flow of photons, further amplifying the weak light signal; this is an important component of second-generation low-light image intensifiers and later versions. The anti-ion feedback membrane is used to reduce ion feedback and protect the device from damage caused by ion bombardment. The fluorescent screen converts the electronic signal into a visible light image for human observation. The brightness and clarity of the fluorescent screen directly affect the performance of the night vision device.)

[0022] Objective lens 11 is connected to eyepiece 13 via connecting tube 14. To facilitate the disassembly of eyepiece 13 and objective lens 11, both eyepiece 13 and objective lens 11 are detachable structures, and both eyepiece 13 and objective lens 11 are slidably connected to both sides of connecting tube 14.

[0023] The image intensifier 12 is located inside the connecting tube 14. A storage slot 15 for placing the image intensifier 12 is provided on one side of the connecting tube 14, and a closed plate 16 connected by bolts is provided above the storage slot 15. In order to ensure that the image intensifier 12 does not change position inside the connecting tube 14, limiting strips 121 for fixing the image intensifier 12 are provided on both sides of the storage slot 15 of the connecting tube 14.

[0024] To ensure rapid positioning and adjustment of the 11x objective lens, this device employs an automated drive structure. An L-shaped fixing block 161 is welded above the sealing plate 16, and a removable battery 122 for powering the image intensifier 12 is located inside the planar end of the L-shaped fixing block 161, ensuring continuous operation of the image intensifier 12. The outer wall of the objective lens 11 has a displacement thread 2, above which a translation screw 21 engages and connects. The displacement thread 2 translates back and forth along the connecting pipe 14. A driving translation screw is located at the vertical end of the L-shaped fixing block 161. The brushless motor 22 of the rod 21 is typically fixed to the vertical end of the L-shaped fixing block 161 with screws. The brushless motor 22 drives the translation screw 21 to rotate, and the displacement thread 2 is engaged with the translation screw 21, so that the objective lens 11 can be quickly positioned according to the rotation of the brushless motor 22. In order to facilitate the determination of the number of rotations of the brushless motor 22 and the corresponding displacement length, the L-shaped fixing block 161 is provided with a USB interface 3 for connecting to the data adjustment system, and the brushless motor 22 is driven by an external system connected to the USB interface 3.

[0025] To ensure that the rotation of the translation screw 21 and the displacement thread 2 does not affect the safety of external operators, a protective groove 111 is provided above the displacement thread 2 of the objective lens 11 to protect the translation screw 21 and the displacement thread 2, and rubber gaskets 112 to prevent dust contamination are attached to the upper and lower ends of the opening of the protective groove 111.

[0026] In a specific implementation of this invention, the low-light night vision device 1 is placed on an experimental table, and the eyepiece 13 of the low-light night vision device 1 is placed in the influence detection area. The computer network is connected to the USB interface 3 using a data cable. Then, the objective lens 11 is aligned with the shooting position, and the computer's positioning system is activated. The image transmitted from the detection area is used to determine whether the observation position of the objective lens 11 is clear. If it is not clear, the computer software is used to remotely control the brushless motor 22 to rotate, thereby controlling the focal length of the objective lens 11. During adjustment, the rotation speed of the brushless motor 22 needs to be adjusted according to the clarity of the image, thereby controlling the feed rate of the objective lens 11.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An optical experimental night vision lens with adjustable magnification, comprising a low-light night vision device (1) consisting of an objective lens (11), an image intensifier (12), and an eyepiece (13), wherein the objective lens (11) is connected to the eyepiece (13) via a connecting tube (14), and the image intensifier (12) is located inside the connecting tube (14), a storage slot (15) for placing the image intensifier (12) is provided on one side of the connecting tube (14), and a sealing plate (16) connected by bolts is provided above the storage slot (15), characterized in that: An L-shaped fixing block (161) is welded above the sealing plate (16), and the outer wall end of the objective lens (11) has a displacement thread (2). A translation screw (21) is provided above the displacement thread (2) and is engaged with it. The displacement thread (2) moves back and forth along the direction of the connecting pipe (14). A brushless motor (22) for driving the translation screw (21) is provided at the vertical end of the L-shaped fixing block (161). The L-shaped fixing block (161) is equipped with a USB interface (3) for connecting to the data adjustment system, and the brushless motor (22) is driven by an external system connected through the USB interface (3).

2. The optical experimental night vision lens with adjustable magnification according to claim 1, characterized in that: The objective lens (11) has a protective groove (111) above the displacement thread (2) to protect the translation screw (21) and the displacement thread (2), and the upper and lower ends of the opening of the protective groove (111) are glued with rubber gaskets (112) to prevent dust contamination.

3. The optical experimental night vision lens with adjustable magnification according to claim 1, characterized in that: The storage slot (15) of the connecting tube (14) is provided with limiting strips (121) for fixing the image intensifier (12) on both sides.

4. The optical experimental night vision lens with adjustable magnification according to claim 1, characterized in that: The image intensifier (12) consists of a photocathode, an electron lens, a microchannel plate, an anti-ion feedback membrane, and a fluorescent screen.

5. The optical experimental night vision lens with adjustable magnification according to claim 1, characterized in that: The L-shaped fixing block (161) has a removable battery (122) inside its flat end for powering the image intensifier (12).

6. The optical experimental night vision lens with adjustable magnification according to claim 1, characterized in that: Both the eyepiece (13) and the objective lens (11) are detachable structures, and both the eyepiece (13) and the objective lens (11) are slidably connected to both sides of the connecting tube (14).

Images