Microlens array demonstration device

Abstract

The invention relates to a demonstration device of a microlens array, and belongs to an optical science popularization education instrument. According to the technical scheme, the demonstration device of the micro-lens array comprises a base, a rotating structure assembly, a lifting structure assembly, a micro-lens board and a miniature drawing board. An audience rotates the rotary structure assembly, and the micro lens board and the micro drawing board have similar periodic structures and are overlapped to form a Moire pattern. Therefore, the Moire magnification effect can be generated only by controlling the angle between the micro image-text board and the micro image-text board, and the micro image-text on the micro image-text board can be magnified and shrunk. The distance between the micro lens plate and the miniature drawing board is changed through the lifting structure assembly, the micro lens plate is composed of a tiny single lens, and according to the imaging principle of the single lens, when the object distance is smaller than the focal length, an upright and magnified virtual image is formed; when the object distance is between the double focal length and the double focal length, an inverted magnified real image is formed. According to the device, audiences can visually know the micro-lens imaging principle and the scientific principle and composition structure of the optical anti-counterfeiting technology, interactivity and interestingness are increased, and the situation that science and technology exhibition halls are lack of such demonstration devices is made up.

Description

Technical Field

[0001] The present invention relates to the field of microlens array application technology, and in particular to a microlens array demonstration device, which belongs to the category of optical science education instruments. Background Art

[0002] The microlens array is composed of sub-lenses with diameters ranging from a few hundred nanometers to a few millimeters arranged in a certain order on a substrate, and the number of units ranges from a few hundred to tens of thousands. Compared with traditional single lenses, the microlens array has extremely high parallelism. Each sub-lens can transmit optical signals independently without interfering with each other. Each sub-lens has the functions of transmitting, transforming and imaging light information.

[0003] In the optical anti-counterfeiting industry, because the microlens array unit is small in size and highly integrated, it can form many new optical systems, using optical principles to create related text or patterns, visually achieving special visual effects, and using this as an anti-counterfeiting feature. Although the audience knows the application of microlens array technology, they often do not fully understand its specific working principles and working conditions in optical anti-counterfeiting technology. Therefore, how to present this static anti-counterfeiting technology in an intuitive and vivid dynamic form so that it is easier for the audience to understand has become an urgent problem to be solved in the display of popular science knowledge in science and technology museums. Summary of the invention

[0004] The purpose of the present invention is to provide a display device for observing the relevant principles and characteristics of a microlens array in a more intuitive and vivid manner.

[0005] The technical solution described in the present invention is a demonstration device of a microlens array, which includes a base, a rotating structure component, a lifting structure component, a microlens plate, and a miniature plate; wherein the base is a metal box with an inclined shape, and the center position of the inclined surface is a circular hole structure; the rotating structure component is fixedly connected to the inclined surface of the base through a turntable seat, the rotating disk is fixedly connected to the outer ring of the bearing turntable, and the inner ring of the bearing turntable is fixedly connected to the turntable seat; the lifting structure component is fixedly connected to the base through a bracket by screws, and the upper plate is concentric with the rotating structure component; the microlens plate is embedded in the annular groove of the rotating disk, the microlens plate is located on the inner side of the tempered glass, and the microlens plate and the tempered glass are both circular and have equal diameters; the circular clip is fixedly connected to the rotating disk by screws, fixes the microlens plate and the tempered glass in the annular groove, and is fixedly connected to the rotating disk; the miniature plate is fixedly connected to the upper plate.

[0006] The rotating structure assembly structure comprises a rotating disk, a turntable seat, a circular clip, a bearing turntable and tempered glass.

[0007] The rotating disk is a disk-shaped structure with a circular opening in the center. The back of the circular opening is an annular groove, which is larger than the circular opening and is fixedly connected to the outer ring of the rotating bearing by bolts.

[0008] The bearing turntable is divided into an outer ring and an inner ring, which rotate coaxially through the bearing balls.

[0009] Among them, the lifting structure component structure includes a lifting platform, a lifting frame, and a servo motor component.

[0010] The lifting platform is divided into an upper plate and a lower plate. Four supporting columns are arranged between the upper plate and the lower plate, and the three are fixedly connected by screws.

[0011] The lifting frame is made of metal material, and the bottom is a bracket with an inclined surface. The inclined plane is parallel to the inclined surface of the base. The upper end is a top plate, which is connected and fixed by four metal rods. The metal rods are covered with linear bearings. Two ball screws are symmetrically arranged on the top plate and the center line of the bracket. The ball screws are covered with ball screw nuts. The lower plate of the lifting platform is connected to the linear bearings and ball screw nuts by screws.

[0012] The servo motor assembly comprises a motor and a coupling. The motor is fixedly connected to the bracket, and the motor shaft is connected to the bottom end of the ball screw through the coupling.

[0013] The microlens plate is made by injection molding, and its surface is composed of 400 microlens sub-units distributed in a diamond shape, the diameter of a single microlens sub-unit is 960 μm, and a transparent material base layer with a certain thickness is below the microlens sub-unit.

[0014] Among them, the miniature board is made of hard material, with miniature images and texts sprayed on the surface. The content consists of 400 image and text sub-units distributed in a diamond shape. The image and text sub-units are distributed correspondingly to the microlens sub-units. The diameter of a single image and text sub-unit is slightly smaller than that of the microlens sub-unit. The miniature board is fixedly connected to the upper plate, and there is a certain gap between the upper surface of the miniature board and the lower surface of the microlens board.

[0015] The audience rotates the rotating disk. Because the rotating disk, the outer ring of the bearing rotating disk and the microlens plate are fixed by screws, the rotating disk drives the microlens plate to rotate 360 ​​degrees. The micro-tissue board is located below the micro-tissue board. The two are coaxial and have a certain gap. The micro-tissue board is fixedly connected to the lifting structure assembly. When the micro-tissue board rotates to form a specific angle with the micro-tissue board, the micro-tissue board will display the tiny pattern on the micro-tissue board through the micro-tissue board. As the rotation angle increases, the pattern will shrink and disappear.

[0016] Beneficial effects of the present invention: (1) The present invention magnifies and decomposes the components of optical anti-counterfeiting technology. The microlens plate can be rotated and stopped at any angle within a 360° range, allowing users to experience the working state and structural composition of the microlens array anti-counterfeiting technology, intuitively observe scientific phenomena, and further understand the scientific principles of optical anti-counterfeiting technology.

[0017] (2) The microlens plate and the micro-print plate have similar periodic structures, overlapping to form a moiré pattern. Because the array periods of the two are the same, the moiré magnification effect can be produced by simply controlling the angle between the two. That is, by manually rotating the microlens plate, the micro-print on the micro-print plate can be magnified or reduced.

[0018] (3) The switch controls the motor to drive the ball screw to rotate, controlling the lifting and lowering of the lifting platform, thereby changing the distance between the microlens plate and the microfilm plate. The microlens plate is composed of tiny single lenses. According to the imaging principle of the single lens, when the object distance is less than the focal length, an upright and enlarged virtual image is formed; when the object distance is between one and two times the focal length, an inverted and enlarged real image is formed.

[0019] (4) This device can be placed in the exhibition hall and used as a teaching aid when the visitors are students, so as to deepen their learning and understanding of the microlens imaging principle and optical anti-counterfeiting technology. It increases the interactivity and fun of popular science and makes up for the lack of such demonstration devices in science and technology exhibition halls. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic cross-sectional view of a demonstration device for a microlens array.

[0021] Figure 2 Schematic diagram of the rotating structural components of a microlens array demonstration device.

[0022] Figure 3 This is a schematic diagram of the lifting structure components of a demonstration device for a microlens array.

[0023] Figure 4 The figure is a schematic diagram of a microlens plate and a micro-image plate of a demonstration device of a microlens array.

[0024] Among them, 1. base; 2. rotating structure component, 21. rotating disk, 211. circular opening, 212. annular sink groove, 22. turntable seat, 23. circular clip, 24. bearing turntable, 241. outer ring, 242. inner ring, 25. tempered glass; 3. lifting structure component, 31. lifting platform, 311. upper plate, 312. lower plate, 313. support column, 32. lifting frame, 321. bracket, 322. top plate, 323. connecting column, 324. linear bearing, 325. ball screw, 326. ball screw nut, 33. servo motor component, 331. motor, 332. coupling; 4. microlens plate, 41. microlens subunit, 42. transparent material base; 5. miniature plate. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, the technical solution described in the present invention is a demonstration device of a microlens array, which comprises a base (1), a rotating structure component (2), a lifting structure component (3), a microlens plate (4), and a miniature plate (5); wherein the base (1) is a metal box with an inclined shape, and the center position of the inclined surface is a circular hole structure; the rotating structure component (2) is fixedly connected to the inclined surface of the base (1) through a turntable seat (21), the rotating disk 21 is fixedly connected to the outer ring (241) of the bearing turntable (24), and the inner ring (242) of the bearing turntable (24) is fixedly connected to the turntable seat (22); the lifting structure component (3) is fixedly connected to the outer ring (241) of the bearing turntable (24), and the inner ring (242) of the bearing turntable (24) is fixedly connected to the turntable seat (22); The bracket (321) is fixedly connected to the base (1) by screws, and the upper plate (311) is cocentric with the rotating structure assembly (2); the microlens plate (4) is embedded in the annular groove (212) of the rotating disk (21), the microlens plate (4) is located inside the tempered glass (25), and the microlens plate (4) and the tempered glass (25) are both circular and have the same diameter; the circular clip (23) is fixedly connected to the rotating disk (21) by screws, and the microlens plate (4) and the tempered glass (25) are fixedly clamped in the annular groove (212), and fixedly connected to the rotating disk; the miniature plate (5) is fixedly connected to the upper plate (311).

[0027] like Figure 2 As shown, the rotating structure assembly (2) comprises a rotating disk (21), a rotating disk seat (22), a circular clip (23), a bearing rotating disk (24), and a tempered glass (25).

[0028] The rotating disk (21) is a disk-shaped structure with a circular opening (211) at the center. The back of the circular opening is an annular recessed groove (212). The size of the annular recessed groove is larger than the circular opening and is fixedly connected to the outer ring (241) of the rotating bearing (24) by bolts.

[0029] The bearing turntable (24) is divided into an outer ring (241) and an inner ring (242), which rotate coaxially via the bearing balls.

[0030] like Figure 3 As shown, the lifting structure assembly (3) comprises a lifting platform (31), a lifting frame (32), and a servo motor assembly (33).

[0031] The lifting platform is divided into an upper plate (311) and a lower plate (312), four support columns (313) are arranged between the upper plate and the lower plate, and the three are fixedly connected by screws.

[0032] The lifting frame (32) is made of metal material, and the bottom is a bracket (321) with an inclined surface shape, whose inclined plane is parallel to the inclined surface of the base, and the upper end is a top plate (322), which is connected and fixed by four metal rods, and the metal rods are covered with linear bearings (324). Two ball screws (325) are symmetrically arranged on the center line of the top plate (322) and the bracket (321), and the ball screw (325) is covered with a ball screw nut (326). The lower plate (312) of the lifting platform is connected to the linear bearing (324) and the ball screw nut (326) by screws.

[0033] The servo motor assembly (33) comprises a motor (331) and a coupling (332); the motor (331) is fixedly connected to the bracket (321); and the shaft of the motor (331) is connected to the bottom end of the ball screw (325) via the coupling (332).

[0034] like Figure 4 As shown, the microlens plate (4) is manufactured by injection molding, and its surface is composed of 400 microlens sub-units (41) distributed in a diamond shape, the diameter of a single microlens sub-unit (41) is 960 μm, and below the microlens sub-unit is a transparent material base layer (42) having a certain thickness.

[0035] The micro-image board (5) is made of a hard material, and has micro-images and texts sprayed on its surface. The content consists of 400 image and text sub-units distributed in a rhombus shape. The image and text sub-units are distributed correspondingly to the micro-lens sub-units (41). The diameter of a single image and text sub-unit is slightly smaller than that of the micro-lens sub-unit (41). The micro-image board (5) is fixedly connected to the upper plate (311), and a certain gap is formed between the upper surface of the micro-image board (5) and the lower surface of the micro-lens board (4).

[0036] The specific implementation case is implemented as follows: because the microlens plate (4) is fixedly connected to the rotating disk (21) through the circular clip (23), and the rotating disk (21) and the outer ring (241) of the bearing rotating disk (24) are fixed by screws, when the audience rotates the rotating disk (21), the rotating disk (21) drives the microlens plate (4) to rotate 360 ​​degrees. The micro-television board (5) is located below the microlens plate (4), and the two are coaxial and have a certain gap. Because the microlens plate (4) and the micro-television board (5) have similar periodic structures and the same array period, the overlap of the two will form a moiré pattern. Therefore, it is only necessary to control the angle between the two to produce a moiré magnification effect, that is, by manually rotating the microlens plate (4), the micro-television on the micro-television board (5) can be enlarged and reduced. The micro-television board (5) is fixedly connected to the lifting structure component (3). The button switch controls the rotation angle of the motor (331), and drives the ball screw (325) to rotate through the coupling (324). Since the ball screw nut (326) is fixedly connected to the lower plate (312) of the lifting platform (31), the ball screw nut (326) and the lifting platform (31) are driven by the ball screw (325) to rise and fall, thereby changing the distance between the microlens plate (4) and the micro-image plate (5). The microlens plate (4) is composed of a tiny single lens. According to the imaging principle of the single lens, when the object distance is less than the focal length, an upright and enlarged virtual image is formed; when the object distance is between one and two times the focal length, an inverted and enlarged real image is formed.

Claims

1. A demonstration device of a microlens array, characterized in that: A demonstration device of a microlens array comprises a base, a rotating structure component, a lifting structure component, a microlens plate, and a miniature plate; wherein the base is a metal box with an inclined shape, and the center position of the inclined surface is a circular hole structure; the rotating structure component is fixedly connected to the inclined surface of the base through a turntable seat, the rotating disk is fixedly connected to the outer ring of the bearing turntable, and the inner ring of the bearing turntable is fixedly connected to the turntable seat; the lifting structure component is fixedly connected to the base through a bracket by screws, and the upper plate is concentric with the rotating structure component; the microlens plate is embedded in the annular groove of the rotating disk, the microlens plate is located on the inner side of the tempered glass, and the microlens plate and the tempered glass are both circular and have equal diameters; the circular clip is fixedly connected to the rotating disk by screws, fixes the microlens plate and the tempered glass in the annular groove, and is fixedly connected to the rotating disk; the miniature plate is fixedly connected to the upper plate.

2. A demonstration device of a microlens array according to claim 1, characterized in that The rotating structure assembly structure comprises a rotating disk, a rotating disk seat, a circular clip, a bearing rotating disk, and tempered glass; The rotating disk is a disk-shaped structure with a circular opening in the center. The back of the circular opening is an annular groove, which is larger than the circular opening and is fixedly connected to the outer ring of the rotating bearing by bolts. The bearing turntable is divided into an outer ring and an inner ring, which rotate coaxially through the bearing balls.

3. A demonstration device of a microlens array according to claim 1, characterized in that The lifting structure assembly structure comprises a lifting platform, a lifting frame, and a servo motor assembly; The lifting platform is divided into an upper plate and a lower plate, four support columns are arranged between the upper plate and the lower plate, and the three are fixedly connected by screws; The lifting frame is made of metal material, and the bottom is a bracket with an inclined surface. The inclined plane is parallel to the inclined surface of the base. The upper end is a top plate, which is connected and fixed by four metal rods. The metal rods are covered with linear bearings. Two ball screws are symmetrically arranged on the top plate and the center line of the bracket. The ball screws are covered with ball screw nuts. The lower plate of the lifting platform is connected to the linear bearings and the ball screw nuts by screws. The servo motor assembly comprises a motor and a coupling. The motor is fixedly connected to the bracket, and the motor shaft is connected to the bottom end of the ball screw through the coupling.

4. A demonstration device of a microlens array according to claim 1, characterized in that The microlens plate is made by injection molding process, and its surface is composed of 400 microlens sub-units distributed in a diamond shape, the diameter of a single microlens sub-unit is 960 μm, and a transparent material base layer with a certain thickness is below the microlens sub-unit.

5. A demonstration device of a microlens array according to claim 1, characterized in that The miniature board is made of hard material, with miniature images and texts sprayed on the surface. The content consists of 400 image and text sub-units distributed in a diamond shape. The image and text sub-units are distributed correspondingly to the microlens sub-units. The diameter of a single image and text sub-unit is slightly smaller than that of the microlens sub-unit. The miniature board is fixedly connected to the upper board, and there is a certain gap between the upper surface of the miniature board and the lower surface of the microlens board.

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