Reciprocating mechanical illumination continuous variable attenuator

Abstract

The invention provides a reciprocating mechanical illumination continuous variable attenuator. The attenuator comprises a fixed layer, a transmission layer and a driving layer, the fixed layer is fixed all the time, the driving layer moves to drive the transmission layer to do linear motion, the first attenuation piece in the fixed layer is a fixed attenuation piece, the second attenuation piece and the third attenuation piece in the transmission layer and the driving layer are movable attenuation pieces, and 60%-100% continuous adjustable attenuation of illumination light is achieved through relative position changes of the three attenuation pieces in the vertical direction of the optical axis. The structure is simpler. Meanwhile, by increasing the number of equally-divided light-transmitting and light-proof parts of the attenuation piece, uniform energy attenuation in the light spot range can be achieved, the light spot shape is not changed while energy is continuously adjustable, and the attenuation piece can be widely applied to the fields of illumination systems, optical measurement equipment, optical communication systems and the like. And a more flexible and accurate light attenuation solution is provided for the fields.

Description

Technical Field

[0001] The invention belongs to the technical field of lighting, and in particular relates to a reciprocating mechanical lighting continuously variable attenuator. Background Art

[0002] The variable attenuator is one of the important components in the lighting system. In the lighting system, different lighting conditions have different requirements for lighting energy, and the lighting energy needs to be adjusted through a variable attenuator. The current mainstream variable attenuator adopts an attenuation film coated on the attenuation plate, and achieves continuous variable adjustment by adjusting the angle of the attenuation plate. This solution is difficult to achieve variable attenuation of wide-spectrum lighting light; the use of a mechanical variable attenuator can achieve attenuation of wide-spectrum lighting light, but it is often difficult to meet continuous adjustment. Although the rotary mechanical continuous variable attenuator can achieve variable attenuation of wide-spectrum lighting light, it requires gears for transmission, has a relatively complex structure, and requires a large space. Therefore, the present invention provides a reciprocating mechanical lighting continuous variable attenuator, which is suitable for continuous variable attenuation of wide-spectrum lighting light energy, and has a more compact and simple structure.

[0003] The current mainstream variable attenuator adopts attenuation film coating on the attenuation plate, and realizes continuous variable adjustment by adjusting the angle of the attenuation plate. This solution is difficult to achieve variable attenuation of wide-spectrum lighting light; the use of mechanical attenuators can achieve attenuation of wide-spectrum lighting light, but it is often difficult to meet the requirements of continuous adjustment. Although the rotary mechanical continuous variable attenuator can achieve variable attenuation of wide-spectrum lighting light, it requires gears for transmission, has a relatively complex structure, and requires a large space. Therefore, the present invention provides a reciprocating mechanical lighting continuous variable attenuator, which is suitable for continuous variable attenuation of wide-spectrum lighting light energy, and has a more compact and simple structure. Summary of the invention

[0004] The object of the present invention is to provide a reciprocating mechanical lighting continuously variable attenuator for realizing continuously variable attenuation of the intensity of wide-spectrum lighting light, so as to realize continuous regulation of the energy of wide-spectrum lighting light.

[0005] The technical solution adopted by the present invention is: a reciprocating mechanical lighting continuously variable attenuator, characterized in that the attenuator comprises a fixed layer, a transmission layer and a driving layer; the fixed layer is always fixed, the driving layer moves, and drives the transmission layer to do linear motion; The fixed layer comprises a first attenuation sheet, a fixed pressing sheet, and a fixed mirror frame; the first attenuation sheet is fixed in the fixed mirror frame by the fixed pressing sheet, and the fixed pressing sheet and the fixed mirror frame are fixed and pressed by screws to tighten the first attenuation sheet; the fixed mirror frame and the mounting base are fixed by screws; The transmission layer comprises a second attenuation sheet, a fixed pressing sheet, a transmission frame, a linear guide rail, and a tension spring; the second attenuation sheet is fixed in the transmission frame by the fixed pressing sheet, and the second attenuation sheet is fixed and pressed between the fixed pressing sheet and the transmission frame by screws; the linear guide rail comprises a linear guide slider and a linear guide rail, the transmission frame and the linear guide slider are fixedly connected by screws, the linear guide rail and the mounting base are fixedly connected by screws, the transmission frame and the fixed base are connected by a tension spring, and the stretching direction of the tension spring is the same as the movement direction of the linear guide rail; The driving layer includes a third attenuation sheet, a fixed pressing sheet, a driving mirror frame, a push rod, a linear module, and a motor; the third attenuation sheet is fixed in the driving mirror frame by the fixed pressing sheet, and the third attenuation sheet is fixed and pressed between the fixed pressing sheet and the driving mirror frame by screws; the linear module includes a linear module slider, the driving mirror frame and the linear module slider are fixedly connected by screws, the linear module and the fixed base are fixedly connected by screws, and the linear module and the motor are connected by a coupling; The first attenuation plate in the fixed layer is a fixed attenuation plate, and the second and third attenuation plates in the transmission layer and the driving layer are movable attenuation plates. By changing the relative positions of the three attenuation plates along the vertical direction of the optical axis, a continuously adjustable attenuation of 60% to 100% of the illumination light can be achieved.

[0006] The beneficial effects of the present invention are as follows: the present invention adopts a reciprocating mechanical light blocking method to attenuate lighting energy, can achieve wide-spectrum lighting light attenuation, and realizes continuous adjustment of lighting light energy, and has a simpler structure than the rotating mechanical light blocking method. At the same time, by increasing the number of equally divided light-transmitting and light-impermeable parts of the attenuation sheet in the present invention, uniform energy attenuation within the light spot range can be achieved, and while the energy is continuously adjustable, the light spot shape is not changed, and it can be widely used in lighting systems, optical measurement equipment, optical communication systems and other fields, providing more flexible and accurate light attenuation solutions for these fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A reciprocating mechanical lighting variable attenuator provided by the present invention; Figure 2 A reciprocating mechanical lighting variable attenuator provided by the present invention; Figure 3 A detailed diagram of the guide rail of a reciprocating mechanical lighting variable attenuator provided by the present invention; Figure 4 A detailed diagram of a tension spring of a reciprocating mechanical lighting variable attenuator provided by the present invention; Figure 5 A cross-sectional view of a reciprocating mechanical lighting variable attenuator provided by the present invention; Figure 6 A detailed view of a push rod portion of a reciprocating mechanical lighting variable attenuator provided by the present invention; Figure 7 Schematic diagram of the push rod; Figure 8 It is a schematic diagram of a square slot block; Fig. 9 Schematic diagram of the attenuation plate.

[0008] In the figure: 1-fixed layer, 2-transmission layer, 3-driving layer, 4-1-first attenuation plate, 4-2-second attenuation plate, 4-3-third attenuation plate, 5-fixed mirror frame, 6-transmission mirror frame, 7-driving mirror frame, 8-fixed pressing plate, 9-push rod, 9-1-outer circle of push rod, 9-2-first push rod mounting hole, 9-3-second push rod mounting hole, 10-linear module, 10-1-linear module slider, 11-linear Linear guide rail, 11-1-linear guide rail, 11-2-linear guide slider, 12-fixed base, 13-tension spring, 14-motor, 15-square slot block, 15-1-right end face of the centrifugal hole, 15-2-first square slot block mounting hole, 15-3-second square slot block mounting hole, 16-light-transmitting part, 17-light-shielding part, 18-hole-type tension spring column, 19-slot-type tension spring column, 20-slot-type tension spring column mounting seat. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other. To achieve the above-mentioned purpose, the present invention adopts the following technical scheme.

[0010] The present invention proposes a reciprocating mechanical lighting continuously variable attenuator, such as Figure 1 As shown, it comprises a fixed layer 1, a transmission layer 2 and a driving layer 3. The fixed layer 1 is always fixed, and the driving layer 3 moves, driving the transmission layer 2 to do linear motion.

[0011] like Figure 2 As shown, the fixed layer 1 includes a first attenuation sheet 4-1, a fixed pressing sheet 8, and a fixed mirror frame 5. The first attenuation sheet 4-1 is fixed in the fixed mirror frame 5 by the fixed pressing sheet 8, and the first attenuation sheet 4-1 is fixed and pressed between the fixed pressing sheet 8 and the fixed mirror frame 5 by screws. The fixed mirror frame 5 and the fixed base 12 are fixed by screws.

[0012] The transmission layer 2 comprises a second attenuation sheet 4-2, a fixed pressing sheet 8, a transmission frame 6, a linear guide rail 11, and a tension spring 13. The second attenuation sheet 4-2 is fixed in the transmission frame 6 by the fixed pressing sheet 8, and the fixed pressing sheet 8 and the transmission frame 6 are fixed and pressed by screws to tighten the second attenuation sheet 4-2. Figure 3As shown, the linear guide 11 includes a linear guide rail 11-1 and a linear guide slider 11-2, the transmission frame 6 and the linear guide slider 11-2 are fixedly connected by screws, the linear guide rail 11-1 and the fixed base 12 are fixedly connected by screws, the transmission frame 6 and the fixed base 12 are connected by a tension spring 13, and the tension direction of the tension spring 13 is the same as the movement direction of the linear guide 11.

[0013] like Figure 4 As shown, the hole-type tension spring column 18 is fixedly mounted on the transmission frame 6 and moves with the transmission frame 6, the groove-type tension spring column 19 is fixedly mounted on the groove-type tension spring column mounting seat 20, and the groove-type tension spring column mounting seat 20 is fixedly mounted on the mounting base 12, that is, the groove-type tension spring column 19 is fixedly connected to the mounting base 12. One end of the tension spring 13 is connected to the groove-type tension spring column 19, and the other end is connected to the hole-type tension spring column 18, and it stretches following the movement of the transmission frame 6.

[0014] like Figure 2 As shown, the driving layer 3 includes a third attenuation sheet 4-3, a fixed pressure sheet 8, a driving frame 7, a push rod 9, a linear module 10, and a motor 14. The third attenuation sheet 4-3 is fixed in the driving frame 7 by the fixed pressure sheet 8, and the third attenuation sheet 4-3 is fixed and pressed between the fixed pressure sheet 8 and the driving frame 7 by screws. The linear module 10 includes a linear module slider 10-1, the driving frame 7 and the linear module slider 10-1 are fixedly connected by screws, the linear module 10 and the fixed base 12 are fixedly connected by screws, and the linear module 10 and the motor 14 are connected by a coupling.

[0015] like Figure 5 , Figure 6 As shown, a push rod 9 is fixed on the driving mirror frame 7 of the driving layer 3, and a square groove block 15 is fixed on the driving mirror frame 6 of the transmission layer 2. Figure 7 As shown, the push rod 9 has a push rod outer circle 9-1, a first push rod mounting hole 9-2 and a second push rod mounting hole 9-3, and the push rod 9 is mounted on the driving mirror frame 7 through the first push rod mounting hole 9-2 and the second push rod mounting hole 9-3. Figure 8As shown, the square slot block 15 has a centrifugal hole deviating from the center line, and the centrifugal hole has a right end face 15-1 of the centrifugal hole, a first square slot block mounting hole 15-2 and a second square slot block mounting hole 15-3. The square slot block 15 is fixed to the transmission mirror frame 6 by screws passing through the first square slot block mounting hole 15-2 and the second square slot block mounting hole 15-3. The outer circle 9-1 of the push rod is inserted into the centrifugal hole of the square slot. In the initial state, the outer circle 9-1 of the push rod is 1mm away from the right end face 15-1 of the centrifugal hole of the square slot block 15. The motor 14 drives the linear module 10 and the drive frame 7 to move linearly to the right. After the drive layer 3 drives the drive frame 7 to move 1mm, the outer circle 9-1 of the push rod 9 contacts the right end face 15-1 of the centrifugal hole of the square slot block 15, thereby driving the transmission mirror frame 6 to move linearly. At this time, the drive frame 7 and the transmission mirror frame 6 move 1mm to the right at the same time to reach the designed stroke.

[0016] like Fig. 9 As shown, the three attenuation sheets have the same structure and all include a shading portion 17 and a translucent portion 16. The shading portion 16 occupies 55% of the area, and the translucent portion 17 occupies 45% of the area. Rectangular through holes are evenly distributed on the attenuation sheet, and the length-frame ratio is 2:1. The shading portion of the attenuation sheet has a 0% illumination light transmittance, and the translucent portion has a 100% illumination light transmittance. The three attenuation sheets are arranged in gaps along the optical axis, wherein the attenuation sheets in the fixed layer are fixed attenuation sheets, and the attenuation sheets in the transmission layer and the drive layer are movable attenuation sheets. The illumination light is continuously adjustable from 60% to 100% by changing the relative positions of the three attenuation sheets along the vertical direction of the optical axis. The 100% attenuation position is a state where the shading portions of the four attenuation sheets do not overlap at all, and the 60% attenuation position is a state where the shading portions of the three attenuation sheets completely overlap.

[0017] The device uses a linear motion mechanism to achieve multi-stage linkage between the three attenuation plates through multi-stage transmission; at the same time, the opaque areas of the attenuation plates are evenly distributed in the length and width directions, and combined with the linkage between the three attenuation plates, the continuous adjustable illumination energy of the wide-spectrum illumination light is achieved.

Claims

1. A reciprocating mechanical lighting continuously variable attenuator, characterized in that: The attenuator comprises a fixed layer, a transmission layer and a driving layer; the fixed layer is always fixed, and the driving layer moves, driving the transmission layer to move linearly; The fixed layer comprises a first attenuation sheet, a fixed pressing sheet, and a fixed mirror frame; the first attenuation sheet is fixed in the fixed mirror frame by the fixed pressing sheet, and the fixed pressing sheet and the fixed mirror frame are fixed and pressed by screws to tighten the first attenuation sheet; the fixed mirror frame and the mounting base are fixed by screws; The transmission layer comprises a second attenuation sheet, a fixed pressing sheet, a transmission frame, a linear guide rail, and a tension spring; the second attenuation sheet is fixed in the transmission frame by the fixed pressing sheet, and the second attenuation sheet is fixed and pressed between the fixed pressing sheet and the transmission frame by screws; the linear guide rail comprises a linear guide slider and a linear guide rail, the transmission frame and the linear guide slider are fixedly connected by screws, the linear guide rail and the mounting base are fixedly connected by screws, the transmission frame and the fixed base are connected by a tension spring, and the stretching direction of the tension spring is the same as the movement direction of the linear guide rail; The driving layer includes a third attenuation sheet, a fixed pressing sheet, a driving mirror frame, a push rod, a linear module, and a motor; the third attenuation sheet is fixed in the driving mirror frame by the fixed pressing sheet, and the third attenuation sheet is fixed and pressed between the fixed pressing sheet and the driving mirror frame by screws; the linear module includes a linear module slider, the driving mirror frame and the linear module slider are fixedly connected by screws, the linear module and the fixed base are fixedly connected by screws, and the linear module and the motor are connected by a coupling; The first attenuation plate in the fixed layer is a fixed attenuation plate, and the second and third attenuation plates in the transmission layer and the driving layer are movable attenuation plates. By changing the relative positions of the three attenuation plates along the vertical direction of the optical axis, a continuously adjustable attenuation of 60% to 100% of the illumination light can be achieved.

2. A reciprocating mechanical lighting continuously variable attenuator according to claim 1, characterized in that: A push rod is fixed on the driving mirror frame of the driving layer, and a square slot block is fixed on the driving mirror frame of the transmission layer; in the initial state, the outer circle of the push rod is inserted into the centrifugal hole of the square slot, and there is a certain distance between the outer circle of the push rod and the right end face of the centrifugal hole in the square slot block. The motor drives the linear module and the driving mirror frame to move linearly to the right. After the driving layer drives the mirror frame to move a certain distance, the push rod contacts the right end face of the centrifugal hole of the square slot block, thereby driving the transmission mirror frame to move linearly. At this time, the driving mirror frame and the transmission mirror frame move to the right at the same time to reach the designed stroke.

3. A reciprocating mechanical lighting continuously variable attenuator according to claim 1, characterized in that: All attenuation sheets include a shading part and a light-transmitting part. The shading part occupies 55% of the area, and the light-transmitting part occupies 45% of the area. Rectangular through holes are evenly distributed on the attenuation sheets, and the length-frame ratio is 2:

1. The shading part of the attenuation sheet has a light transmittance of 0%, and the light transmittance of the light-transmitting part is 100%. The three attenuation sheets are arranged with gaps along the optical axis.

4. A reciprocating mechanical lighting continuously variable attenuator according to claim 3, characterized in that: The 100% attenuation position is a state where the shading parts of the four attenuation plates do not overlap at all, and the 60% attenuation position is a state where the shading parts of the three attenuation plates completely overlap.

5. A reciprocating mechanical lighting continuously variable attenuator according to claim 2, characterized in that: The hole-type tension spring column is fixedly installed on the transmission frame and moves with the transmission frame. The groove-type tension spring column is fixedly installed on the groove-type tension spring column mounting seat. The groove-type tension spring column mounting seat is fixedly installed on the mounting base, that is, the groove-type tension spring column and the mounting base are fixedly connected. One end of the tension spring is connected to the groove-type tension spring column, and the other end is connected to the hole-type tension spring column, and it stretches following the movement of the transmission frame.

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