Reciprocating mechanical type lighting continuously variable attenuator

Abstract

The application provides a reciprocating mechanical type illumination continuous variable attenuator, which 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 move linearly, the first attenuation piece in the fixed layer is a fixed attenuation piece, the second and third attenuation pieces in the transmission layer and the driving layer are movable attenuation pieces, and the relative position change of the three attenuation pieces along the vertical direction of the optical axis realizes the continuous adjustable attenuation of 60% to 100% of the illumination light. The application has a simpler structure. Meanwhile, by increasing the number of the light-transmitting and non-light-transmitting parts of the attenuation piece, the uniform energy attenuation in the light spot range can be realized, the energy is continuously adjustable, the light spot shape is not changed, and the application can be widely applied to the fields of illumination systems, optical measurement equipment, optical communication systems and the like, and provides a more flexible and accurate light attenuation solution for these fields.

Description

Technical Field

[0001] This invention belongs to the field of lighting technology, and particularly relates to a reciprocating mechanical lighting continuously variable attenuator. Background Technology

[0002] Variable attenuators are a crucial component of lighting systems. Different lighting conditions require different amounts of lighting energy, necessitating the adjustment of this energy through variable attenuators. Currently, mainstream variable attenuators employ an attenuation film coated on the attenuator plate, achieving continuous variable adjustment by changing the plate's angle. However, this approach struggles to achieve variable attenuation of a broad spectrum of lighting light. Mechanical variable attenuators can attenuate a broad spectrum of lighting light, but they often lack continuous adjustability. While rotary mechanical continuously variable attenuators can achieve variable attenuation of a broad spectrum of lighting light, they require gear transmission, resulting in a complex structure and significant space requirements. Therefore, this invention provides a reciprocating mechanical continuously variable lighting attenuator suitable for continuous variable attenuation of broad spectrum lighting energy, with a more compact and simpler structure.

[0003] Currently, mainstream variable attenuators use an attenuation film coated on the attenuator plate, achieving continuous variable adjustment by changing the angle of the attenuator plate. This approach is difficult to achieve variable attenuation of broadband illumination light. Mechanical attenuators can achieve broadband illumination light attenuation, but they often cannot meet the requirement of continuous adjustment. Although rotary mechanical continuously variable attenuators can achieve variable attenuation of broadband illumination light, they require gear transmission, resulting in a complex structure and large space requirements. Therefore, this invention provides a reciprocating mechanical continuously variable illumination attenuator, suitable for continuous variable attenuation of broadband illumination light energy, and with a more compact and simple structure. Summary of the Invention

[0004] The purpose of this invention is to provide a reciprocating mechanical lighting continuously variable attenuator to achieve continuous variable attenuation of broadband lighting intensity, so as to realize continuous adjustment of broadband lighting energy.

[0005] The technical solution adopted in this invention is: a reciprocating mechanical lighting continuously variable attenuator, characterized in that the attenuator includes 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 make linear motion;

[0006] The fixing layer includes a first attenuation plate, a fixing plate, and a fixing frame; the first attenuation plate is fixed in the fixing frame by the fixing plate, and the fixing plate and the fixing frame are fixed and pressed together by screws; the fixing frame and the mounting base are fixed by screws.

[0007] The transmission layer includes a second attenuator, a fixing plate, a transmission mirror frame, a linear guide rail, and a tension spring. The second attenuator is fixed inside the transmission mirror frame by the fixing plate, and the fixing plate and the transmission mirror frame are fixedly pressed together by screws. The linear guide rail has a linear guide rail slider and a linear guide rail slide rail. The transmission mirror frame and the linear guide rail slider are fixedly connected by screws. The linear guide rail slide rail and the mounting base are fixedly connected by screws. The transmission mirror frame and the fixing base are connected by a tension spring. The tension spring's stretching direction is the same as the linear guide rail's movement direction.

[0008] The drive layer includes a third attenuator, a fixing plate, a drive lens frame, a push rod, a linear module, and a motor. The third attenuator is fixed inside the drive lens frame by the fixing plate, and the fixing plate and the drive lens frame are fixed and pressed together by screws. The linear module includes a linear module slider, the drive lens 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.

[0009] The first attenuator in the fixed layer is a fixed attenuator, while the second and third attenuators in the transmission and drive layers are movable attenuators. The illumination light can be continuously and flexibly attenuated from 60% to 100% by changing the relative positions of the three attenuators along the vertical direction of the optical axis.

[0010] The beneficial effects of this invention are as follows: This invention employs a reciprocating mechanical light-blocking method for illumination energy attenuation, achieving broadband illumination light attenuation and continuous adjustment of the illumination light energy. Compared to rotating mechanical light-blocking methods, its structure is simpler. Furthermore, by increasing the number of equally distributed transparent and opaque portions of the attenuator in this invention, uniform energy attenuation within the light spot area can be achieved. While maintaining continuous energy adjustment, the shape of the light spot remains unchanged. This allows for wide application in lighting systems, optical measurement equipment, optical communication systems, and other fields, providing these fields with a more flexible and precise light attenuation solution. Attached Figure Description

[0011] Figure 1 This invention provides a reciprocating mechanical variable attenuator for lighting;

[0012] Figure 2 This invention provides a reciprocating mechanical variable attenuator for lighting;

[0013] Figure 3 Detailed view of the guide rail for a reciprocating mechanical variable attenuator for lighting provided by the present invention;

[0014] Figure 4 Detailed drawing of a tension spring for a reciprocating mechanical variable attenuator for lighting provided by the present invention;

[0015] Figure 5A cross-sectional view of a reciprocating mechanical lighting variable attenuator provided by the present invention;

[0016] Figure 6 A detailed view of the push rod portion of a reciprocating mechanical lighting variable attenuator provided by the present invention;

[0017] Figure 7 This is a schematic diagram of the push rod;

[0018] Figure 8 This is a schematic diagram of a square groove block;

[0019] Figure 9 This is a schematic diagram of an attenuator.

[0020] In the diagram: 1-Fixed layer, 2-Transmission layer, 3-Drive layer, 4-1-First attenuator, 4-2-Second attenuator, 4-3-Third attenuator, 5-Fixed lens frame, 6-Transmission lens frame, 7-Drive lens frame, 8-Fixed pressure plate, 9-Push rod, 9-1-Push rod outer circle, 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 slide rail, 11-2-Linear guide rail slider, 12-Fixed base, 13-Tension spring, 14-Motor, 15-Square slot block, 15-1-Right end face of centrifuge 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-shaped tension spring post, 19-Slot-shaped tension spring post, 20-Slot-shaped tension spring post mounting base. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other. To achieve the above objectives, this invention adopts the following technical solution.

[0022] This invention proposes a reciprocating mechanical lighting continuously variable attenuator, such as... Figure 1 As shown, it includes a fixed layer 1, a transmission layer 2, and a drive layer 3. The fixed layer 1 is always fixed, while the drive layer 3 moves, causing the transmission layer 2 to move in a straight line.

[0023] like Figure 2 As shown, the fixing layer 1 includes a first attenuator 4-1, a fixing plate 8, and a fixing frame 5. The first attenuator 4-1 is fixed inside the fixing frame 5 by the fixing plate 8, and the fixing plate 8 and the fixing frame 5 are secured together by screws. The fixing frame 5 and the fixing base 12 are fixed together by screws.

[0024] The transmission layer 2 includes a second attenuator 4-2, a fixing plate 8, a transmission mirror frame 6, a linear guide rail 11, and a tension spring 13. The second attenuator 4-2 is fixed inside the transmission mirror frame 6 by the fixing plate 8, and the fixing plate 8 and the transmission mirror frame 6 are secured together by screws. Figure 3 As shown, the linear guide rail 11 includes a linear guide rail slide rail 11-1 and a linear guide rail slider 11-2. The transmission mirror frame 6 and the linear guide rail slider 11-2 are fixedly connected by screws. The linear guide rail slide rail 11-1 and the fixed base 12 are fixedly connected by screws. The transmission mirror frame 6 and the fixed base 12 are connected by a tension spring 13. The tension spring 13 is stretched in the same direction as the linear guide rail 11.

[0025] like Figure 4 As shown, the perforated tension spring post 18 is fixedly mounted on the transmission mirror frame 6 and moves with the transmission mirror frame 6. The grooved tension spring post 19 is fixedly mounted on the grooved tension spring post mounting base 20, which in turn is fixedly mounted on the mounting base 12. That is, the grooved tension spring post 19 and the mounting base 12 are rigidly connected. One end of the tension spring 13 is connected to the grooved tension spring post 19, and the other end is connected to the perforated tension spring post 18, and it stretches as the transmission mirror frame 6 moves.

[0026] like Figure 2 As shown, the drive layer 3 includes a third attenuator 4-3, a fixing plate 8, a drive lens frame 7, a push rod 9, a linear module 10, and a motor 14. The third attenuator 4-3 is fixed inside the drive lens frame 7 by the fixing plate 8, and the fixing plate 8 and the drive lens frame 7 are fixed and pressed together by screws. The linear module 10 includes a linear module slider 10-1. The drive lens 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. The linear module 10 and the motor 14 are connected by a coupling.

[0027] like Figure 5 , Figure 6 As shown, a push rod 9 is fixed on the drive mirror frame 7 of the drive layer 3, and a square slot block 15 is fixed on the transmission mirror frame 6 of the transmission layer 2. Figure 7 As shown, the push rod 9 has an outer circle 9-1, a first push rod mounting hole 9-2, and a second push rod mounting hole 9-3. The push rod 9 is mounted on the drive 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 off-center. The centrifugal hole has a right end face 15-1, 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 distance between the outer circle 9-1 of the push rod and the right end face 15-1 of the centrifugal hole of the square slot block 15 is 1mm. The motor 14 drives the linear module 10 and the drive mirror frame 7 to move linearly to the right. After the drive layer 3 drives the drive mirror 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 mirror frame 7 and the transmission mirror frame 6 move 1mm to the right to reach the designed stroke.

[0028] like Figure 9 As shown, the three attenuators have identical structures, each including a light-blocking portion 17 and a light-transmitting portion 16. The light-blocking portion 16 occupies 55% of the area, and the light-transmitting portion 17 occupies 45% of the area. Rectangular through-holes are evenly distributed on the attenuators, with a length-to-frame ratio of 2:1. The light transmittance of the light-blocking portion of the attenuator is 0%, while the light transmittance of the light-transmitting portion is 100%. The three attenuators are arranged with gaps along the optical axis. The attenuators in the fixed layer are fixed, while those in the transmission and drive layers are movable. The continuous adjustable attenuation of the illumination light from 60% to 100% is achieved by changing the relative positions of the three attenuators along the vertical direction of the optical axis. The 100% attenuation position is when the light-blocking portions of the four attenuators are completely non-overlapping, and the 60% attenuation position is when the light-blocking portions of the three attenuators are completely overlapping.

[0029] This device utilizes a linear motion mechanism to achieve multi-stage linkage between the three attenuators through multi-stage transmission. At the same time, the opaque areas of the attenuators are evenly distributed in the length and width directions. Combined with the linkage between the three attenuators, the illumination energy of the broadband illumination light can be continuously adjusted.

Claims

1. A reciprocating mechanical type lighting continuously variable attenuator characterized by, The attenuator comprises a fixed layer, a transmission layer and a driving layer; the fixed layer is always fixed, the driving layer moves to drive the transmission layer to move linearly; The fixed layer comprises a first attenuating sheet, a fixed pressing sheet and a fixed mirror frame; the first attenuating sheet is fixed in the fixed mirror frame through the fixed pressing sheet, the fixed pressing sheet and the fixed mirror frame are fixed through a screw to press the first attenuating sheet; the fixed mirror frame and the mounting base are fixed through a screw; The transmission layer comprises a second attenuating sheet, a fixed pressing sheet, a transmission mirror frame, a linear guide rail and a tension spring; the second attenuating sheet is fixed in the transmission mirror frame through the fixed pressing sheet, the fixed pressing sheet and the transmission mirror frame are fixed through a screw to press the second attenuating sheet; the linear guide rail has a linear guide rail slider and a linear guide rail sliding rail, the transmission mirror frame and the linear guide rail slider are fixedly connected through a screw, the linear guide rail sliding rail and the mounting base are fixedly connected through a screw, the transmission mirror frame and the mounting base are connected through the tension spring, and the tension direction of the tension spring is the same as the movement direction of the linear guide rail; The driving layer comprises a third attenuating sheet, a fixed pressing sheet, a driving mirror frame, a push rod, a linear module and a motor; the third attenuating sheet is fixed in the driving mirror frame through the fixed pressing sheet, the fixed pressing sheet and the driving mirror frame are fixed through a screw to press the third attenuating sheet; the linear module comprises a linear module slider, the driving mirror frame and the linear module slider are fixedly connected through a screw, the linear module and the mounting base are fixedly connected through a screw, and the linear module and the motor are connected through a shaft coupling; The first attenuating sheet in the fixed layer is a fixed attenuating sheet, the second and third attenuating sheets in the transmission layer and the driving layer are movable attenuating sheets, and the relative position changes of the three attenuating sheets along the optical axis vertical direction realize 60% to 100% continuous adjustable attenuation of the illumination light; The driving mirror frame of the driving layer is fixed with a push rod, and the transmission mirror frame of the transmission layer is fixed with a square groove block; in the initial state, the outer circle of the push rod is inserted into the centrifugal hole of the square groove block, there is a certain distance between the outer circle of the push rod and the right side end face of the centrifugal hole of the square groove block, the motor drives the linear module and the driving mirror frame to move linearly to the right, the push rod and the right side end face of the centrifugal hole of the square groove block are in contact after the driving mirror frame of the driving layer moves a certain distance, so as to drive the transmission mirror frame to move linearly, at this time, the driving mirror frame and the transmission mirror frame move to the right simultaneously to reach the designed stroke; the three attenuating sheets are the same in structure and each comprises an opaque part and a transparent part, and the attenuating sheet is uniformly provided with a rectangular through hole.

2. The reciprocating mechanical illumination continuous variable attenuator according to claim 1, wherein all the attenuating sheets comprise an opaque part and a transparent part, the opaque part accounts for 55% of the area, the transparent part accounts for 45% of the area, the attenuating sheet is uniformly provided with a rectangular through hole, the length-width ratio of the rectangular through hole is 2:1, the illumination light transmittance of the opaque part of the attenuating sheet is 0%, the illumination light transmittance of the transparent part of the attenuating sheet is 100%, and the three attenuating sheets are arranged with gaps along the optical axis direction.

3. The reciprocating mechanical illumination continuous variable attenuator according to claim 2, wherein the 100% attenuation position is a state that the opaque parts of the three attenuating sheets do not overlap completely, and the 60% attenuation position is a state that the opaque parts of the three attenuating sheets overlap completely.

4. The reciprocating mechanical illumination continuous variable attenuator according to claim 1, wherein ​ ​ The hole type tension spring post is fixedly installed on the transmission mirror frame and moves with the transmission mirror frame, the slot type tension spring post is fixedly installed on the slot type tension spring post mounting seat, and the slot type tension spring post mounting seat is fixedly installed on the mounting base, that is, the slot type tension spring post and the mounting base are fixedly connected, one end of the tension spring is connected with the slot type tension spring post, and the other end is connected with the hole type tension spring post, and the tension spring is stretched with the movement of the transmission mirror frame.

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