A laser attenuation protection device

Abstract

The present invention discloses a laser attenuation protection device, which realizes automatic shielding of the laser when the staff replaces or adds / subtracts the attenuation sheet, can meet the response range of the detector, and avoid damage to the detector. It includes an attenuation sheet support frame and an attenuation sheet holder. The attenuation sheet support frame includes a main body frame, a movable plate, and a movable plate lifting part. The main body frame includes a front panel and a rear panel that are perpendicular to the horizontal setting, and the front panel and the rear panel are parallel. The top of the front panel is provided with an attenuation sheet slot A, the upper part of the rear panel is provided with a laser through hole, and the upper end of the laser through hole is provided with a position switch; the height of the laser through hole and the position switch on the rear panel exceeds the attenuation sheet slot A. The top of the movable plate is provided with an attenuation sheet slot B; the movable plate and the movable plate lifting part are arranged between the front panel and the rear panel. The movable plate lifting part drives the movable plate to move up and down, so that the top of the movable plate travels in height from the attenuation sheet slot A to the position switch on the rear panel.

Description

Technical Field

[0001] The present invention relates to the technical field of laser attenuation, and particularly relates to a laser attenuation protection device. Background Art

[0002] Lasers have the characteristics of good coherence, strong directivity, and high brightness. However, in the field of laser detection, the intensity of laser signals can easily exceed the response range of detectors, causing the detectors to saturate or even be damaged. There are many types of laser attenuators, and different types of attenuators adopt different working principles. Among them, the attenuation sheet type optical attenuator directly fixes the attenuation sheet with absorption characteristics in the optical path or on the end face of the optical fiber to achieve the purpose of attenuating the optical signal. This method can be used not only to manufacture fixed optical attenuators but also variable optical attenuators. The attenuation sheet utilizes the absorption characteristics of substances for light. After the light is incident, part of the light is absorbed and reflected by the attenuation sheet, and the transmittance can be changed. Different wavelengths are attenuated in the same proportion.

[0003] Currently, the well-known strong laser attenuation device of the attenuation sheet type generally consists of two parts: an attenuation sheet and an attenuation sheet holding device. When effectively measuring parameters such as the energy, power, repetition frequency, and time distribution of the laser, it is often necessary to manually add or subtract attenuation sheets between the strong laser signal and the detector to attenuate the intensity of the strong laser signal to meet the response range of the detector and avoid damage to the detector.

[0004] The wavelength of the laser is generally in the invisible light band. When the staff measures the laser parameters, due to the invisibility of the laser to the naked eye, during the entire working or experimental stage, the operation of adding, subtracting, or replacing the attenuation sheet is very likely to cause misoperations. For example, replacing the attenuation sheet when the laser radiator is not turned off may damage the laser detector, and in more serious cases, it may even cause the adverse consequence of the laser entering the human eye.

[0005] Therefore, there is an urgent need for an automatic strong laser attenuation protection device that can meet the response range of the detector and avoid damage to the detector. Summary of the Invention

[0006] In view of this, the present invention provides a laser attenuation protection device, which realizes automatic shielding of the laser when the staff replaces or adds / subtracts the attenuation sheet, can meet the response range of the detector, and avoid damage to the detector.

[0007] To achieve the above object, the technical solution of the present invention is: a laser attenuation protection device, including an attenuation sheet support frame and an attenuation sheet holder.

[0008] The attenuation sheet support frame includes a main frame, a movable plate, and a movable plate lifting part.

[0009] The main body frame includes a front panel and a rear panel that are perpendicular to the horizontal setting, and the front panel and the rear panel are parallel.

[0010] At the top of the front panel, there is an attenuation sheet slot A, and at the upper part of the rear panel, there is a laser through hole. At the upper end of the laser through hole, there is a position switch; the height of the laser through hole and the position switch on the rear panel exceeds the attenuation sheet slot A.

[0011] At the top of the movable plate, there is an attenuation sheet slot B; the movable plate and the movable plate lifting part are arranged between the front panel and the rear panel.

[0012] The movable plate lifting part drives the movable plate to move up and down, so that the top of the movable plate has a height travel range from the attenuation sheet slot A to the position switch on the rear panel.

[0013] Furthermore, when the attenuation sheet slots A and B are at the same height, the combination of the attenuation sheet slots A and B is used to place the attenuation sheet holder.

[0014] Furthermore, the movable plate lifting part is a spring telescopic structure.

[0015] The spring telescopic structure is fixedly connected to the bottom end of the movable plate. In the natural state, the top of the movable plate abuts against the position switch.

[0016] When the attenuation sheet holder is arranged on the attenuation sheet slot B, the attenuation sheet holder and the movable plate jointly compress the spring telescopic structure under the action of gravity until the attenuation sheet slot B is at the same height as the attenuation sheet slot B.

[0017] Furthermore, the spring telescopic structure includes a constant force spring, a constant force spring fixing box, and a rotating shaft.

[0018] The constant force spring fixing box is fixedly connected to the front panel.

[0019] The movable plate is located between the rear panel and the constant force spring fixing box.

[0020] A rotating shaft is arranged in the constant force spring fixing box, and the rotating shaft is fixed in a direction parallel to the front and rear panels.

[0021] One end of the constant force spring is wound and fixed on the rotating shaft, and the other end is fixedly connected to the bottom end of the movable plate.

[0022] Beneficial effects:

[0023] The present invention provides a laser attenuation protection device, which can ensure that when the staff performs the operation of replacing the attenuation sheet, the laser is automatically and directly blocked by the movable plate, preventing the damage of the laser detection structure caused by the misoperation of the personnel. The structure is simple, easy to use, low in cost, conveniently makes the operation of the laser device safe, increases the controllability, can meet the response range of the detector, and avoids the damage of the detector. Description of the Drawings

[0024] Figure 1 Schematic diagram of the overall structure of a laser attenuation protection device provided by an embodiment of the present invention;

[0025] Figure 2 Partial cross-sectional view of a laser attenuation protection device provided by an embodiment of the present invention. Detailed implementation manners

[0026] The present invention will be described in detail below with reference to the accompanying drawings and by way of examples.

[0027] The present invention provides a laser attenuation protection device, the overall structure of which is as Figure 1 shown, including an attenuation sheet support frame and an attenuation sheet holder 3.

[0028] The attenuation sheet support frame includes a main frame 1, a movable plate 2 and a movable plate lifting part.

[0029] The main frame 1 includes a front panel and a rear panel that are perpendicular to the horizontal and parallel to each other.

[0030] The top of the front panel is provided with an attenuation sheet card slot A, the upper part of the rear panel is provided with a laser through hole, and the upper end of the laser through hole is provided with a position switch 4; the height of the laser through hole and the position switch 4 on the rear panel exceeds the attenuation sheet card slot A.

[0031] The top of the movable plate 2 is provided with an attenuation sheet card slot B; the movable plate 2 and the movable plate lifting part are arranged between the front panel and the rear panel.

[0032] The movable plate lifting part drives the movable plate 2 to move up and down, so that the top of the movable plate 2 travels in height from the attenuation sheet card slot A to the position switch 4 on the rear panel.

[0033] In an embodiment of the present invention, when the attenuation sheet card slots A and B are at the same height, the combination of the attenuation sheet card slots A and B is used to place the attenuation sheet holder 3.

[0034] In an embodiment of the present invention, the movable plate lifting part is a spring telescopic structure.

[0035] The spring telescopic structure is fixedly connected to the bottom end of the movable plate 2. In the natural state, the top of the movable plate abuts against the position switch 4.

[0036] When the attenuation sheet holder 3 is arranged on the attenuation sheet card slot B, the attenuation sheet holder 3 and the movable plate 2 jointly compress the spring telescopic structure under the action of gravity until the attenuation sheet card slot B and the attenuation sheet card slot B are at the same height.

[0037] In an embodiment of the present invention, the partial cross-sectional view of the laser attenuation protection device is as Figure 2 shown, and the spring telescopic structure includes a constant force spring 8, a constant force spring fixing box 6 and a rotating shaft 7.

[0038] The constant force spring fixing box 6 is fixedly connected to the front panel.

[0039] The movable plate 2 is located between the rear panel and the constant force spring fixing box 6.

[0040] A rotating shaft 7 is arranged in the constant force spring fixing box 6, and the rotating shaft 7 is fixed in a direction parallel to the front and rear panels.

[0041] One end of the constant force spring 8 is wound and fixed on the rotating shaft 7, and the other end is fixedly connected to the bottom end of the movable plate 2.

[0042] The working principle of the present invention is as follows:

[0043] Working principle: When no operation is performed, the device is in a static state, and the constant force spring (8) is in a wound and contracted state. Due to the elastic potential energy of the spring, the movable plate (2) is pushed to the position of the upper clamping switch (4), and at this time, the clamping switch (4) fixes the movable plate (3); when the staff performs the operation of placing the attenuation sheet, the attenuation sheet holder (3) containing the attenuation sheet is placed on the movable plate (2). Due to gravity, the movable plate (2) descends, so that the constant force spring (8) is stretched and drives the rotating shaft (7) to rotate. At this time, the attenuation sheet holder (3) is placed on the card slot of the main body frame (1); when the staff performs the operation of replacing the attenuation sheet, the attenuation sheet holder (3) containing the attenuation sheet is taken away. At this time, the deformation of the constant force spring (8) is restored, and then it drives the rotating shaft to return to the original position. At this time, the movable plate (3) is pushed to the upper part again to the clamping switch (4), and then the through hole for the laser to enter the instrument is blocked.

[0044] In summary, the above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser attenuation protection device, characterized in that, It includes an attenuation sheet support frame and an attenuation sheet holder (3); The attenuation sheet support frame includes a main frame (1), a movable plate (2), and a movable plate lifting part; The main frame (1) includes a front panel and a rear panel that are perpendicular to the horizontal direction, and the front panel and the rear panel are parallel; The top of the front panel is provided with an attenuation sheet card slot A, the upper part of the rear panel is provided with a laser through hole, and a clamping switch (4) is provided at the upper end of the laser through hole; the height of the laser through hole and the clamping switch (4) on the rear panel exceeds the attenuation sheet card slot A; The top of the movable plate (2) is provided with an attenuation sheet card slot B; the movable plate (2) and the movable plate lifting part are arranged between the front panel and the rear panel; The movable plate lifting part drives the movable plate (2) to move up and down, so that the top of the movable plate (2) has a height travel range from the attenuation sheet card slot A to the clamping switch (4) on the rear panel; The movable plate lifting part is a spring telescopic structure; the spring telescopic structure is fixedly connected to the bottom end of the movable plate (2), and in the natural state, the top of the movable plate abuts against the clamping switch (4); when the attenuation sheet holder (3) is arranged on the attenuation sheet card slot B, the attenuation sheet holder (3) and the movable plate (2) jointly compress the spring telescopic structure under the action of gravity until the attenuation sheet card slot B is at the same height as the attenuation sheet card slot A; The spring telescopic structure includes a constant force spring (8), a constant force spring fixing box (6), and a rotating shaft (7); the constant force spring fixing box (6) is fixedly connected to the front panel; The movable plate (2) is located between the rear panel and the constant force spring fixing box (6); a rotating shaft (7) is arranged in the constant force spring fixing box (6), and the rotating shaft (7) is fixed in a direction parallel to the front and rear panels; one end of the constant force spring (8) is wound and fixed on the rotating shaft (7), and the other end is fixedly connected to the bottom end of the movable plate (2); When the attenuation sheet card slots A and B are at the same height, the combination of the attenuation sheet card slots A and B is used to place the attenuation sheet holder (3); When no operation is performed, the device is in a static state, the constant force spring (8) is in a wound and contracted state, and due to the elastic potential energy of the spring, the movable plate (2) is pushed to the position of the upper clamping switch (4), and at this time the clamping switch (4) fixes the movable plate (2); when the staff performs the operation of placing the attenuation sheet, the attenuation sheet holder (3) containing the attenuation sheet is placed on the movable plate (2), and due to gravity, the movable plate (2) descends, so that the constant force spring (8) is stretched and drives the rotating shaft (7) to rotate. At this time, the attenuation sheet holder (3) is placed on the card slot of the main frame (1); when the staff performs the operation of replacing the attenuation sheet, the attenuation sheet holder (3) containing the attenuation sheet is taken away. At this time, the deformation of the constant force spring (8) is restored, and then it drives the rotating shaft to return to the original position. At this time, the movable plate (2) is pushed to the upper part again to the clamping switch (4), and then the through hole for the laser to enter the instrument is blocked.

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