Structure for eliminating laser speckles

Abstract

The utility model discloses a structure for eliminating laser speckles, which is used for solving the technical problem that the film watching visual experience is reduced due to the existence of laser speckles, and belongs to the technical field of laser speckle elimination. The vibration device comprises a motor and a vibration base, the top of the motor is connected with an eccentric seat, the motor is fixed on a first mounting seat, a scattering sheet is fixed on the first mounting seat, and the vibration base is elastically connected with the first mounting seat.

Description

Technical Field

[0001] This utility model belongs to the field of laser speckle elimination technology, and specifically relates to a structure for eliminating laser speckle. Background Technology

[0002] As a light source with high coherence, high brightness and high directionality, lasers play a pivotal role in modern science and technology and industrial production.

[0003] In the cinema projection industry, laser light sources have several advantages over bulb light sources: 1. Brightness: Higher initial brightness; under the same cost and size conditions, laser light sources generally outperform bulb light sources in terms of brightness. 2. Color performance: Higher color purity; lasers have better monochromaticity and a wider color gamut, capable of displaying more color details and levels. 3. Lifespan: Longer lifespan; laser light sources have lower energy consumption and a lifespan of over 30,000 hours, several times that of bulb light sources. 4. Stability: Slower light decay; the decay curve of laser light sources is relatively gentler. Unaffected by vibration: The light-emitting structure of laser light sources is relatively simple, unlike bulb light sources which contain filaments and other components susceptible to vibration. 5. Environmental friendliness and energy saving: Low energy consumption; laser light sources have high energy conversion efficiency. Therefore, more and more cinemas are choosing to use projection equipment with laser light sources.

[0004] However, in certain applications, lasers can produce a phenomenon known as "specklight," which makes the image appear grainy, like a layer of frosted glass. This is particularly noticeable when playing large scenes or solid-color images, severely reducing image clarity and detail, and affecting the viewer's appreciation of image details. It also causes color distortion: speckle interferes with the normal display of colors, making the colors uneven and inaccurate. For example, certain areas may appear lighter or darker due to speckle, resulting in overall color distortion and an inability to faithfully reproduce the original colors of the film, thus diminishing the viewer's visual experience. Therefore, eliminating laser speckle is of paramount importance for movie viewing.

[0005] The shortcomings of existing technology are as follows: During the projection of laser light sources in cinemas, the speckle defect of the laser causes a serious reduction in the clarity and detail of the picture, affecting the audience's appreciation of the picture details; it will interfere with the normal display of colors, making the picture colors uneven and inaccurate; when watching a picture with speckle, the audience's eyes need to constantly adjust the focus to focus on different bright and dark spots, which can easily cause visual fatigue and discomfort. Watching for a long time will cause eye soreness and pain, affecting the comfort and duration of the movie viewing. Utility Model Content

[0006] The purpose of this invention is to provide a structure for eliminating laser speckle, thereby solving the technical problem that laser speckle reduces the viewing experience.

[0007] This utility model is achieved using the following technical solution:

[0008] A structure for eliminating laser speckle includes a motor and a vibrating base. An eccentric seat is connected to the top of the motor. The motor is fixed on a mounting base, and a scattering plate is fixed on the mounting base. The vibrating base is elastically connected to the mounting base.

[0009] In application, the top of the motor is connected to an eccentric seat, and the bottom is fixed to mounting base one. Mounting base one is elastically connected to the vibration base, which can fix the device in the required position. The laser beam first hits the scattering sheet and then forms an image. After the motor is started, due to the influence of the eccentric seat, the motor will vibrate during rotation. When the motor vibrates, it will cause mounting base one to vibrate as well. Since mounting base one and the vibration base are elastically connected, it will not affect the fixed connection between the vibration base and other places. Mounting base one will drive the scattering sheet to vibrate. The regular micro-vibrations of the scattering sheet will destroy the coherence of the speckle, thereby reducing the contrast of the speckle and averaging the speckle within the visual persistence time, reducing the impact of speckle on image quality, and thus achieving speckle elimination effect.

[0010] More preferably, the eccentric seat is connected to the motor by adhesive.

[0011] More preferably, the bottom of the motor is fixedly connected to the mounting base by screws.

[0012] More preferably, the eccentric seat is a circular piece with an eccentric hole, and the center of the eccentric seat is provided with a central hole for assembly with the motor. The central hole of the eccentric seat is connected to the motor shaft by glue.

[0013] Further preferably, it also includes a Phillips screw and a spring. The mounting base is provided with a mounting hole. The vibration base is provided with a column that engages with the mounting hole. The inside of the column is provided with a thread that mates with the Phillips screw. The spring is sleeved on the outside of the column and is located between the head of the Phillips screw and the vibration base.

[0014] More preferably, the spring is a conical spring, and a circular spring groove is provided on the upper and / or lower part of the mounting hole. The diameter of the spring groove is larger than the diameter of the mounting hole. The smaller diameter side of the conical spring is smaller than the diameter of the Phillips head screw, and the larger diameter side of the conical spring is not larger than the diameter of the spring groove and not smaller than the diameter of the column.

[0015] More preferably, the mounting base 1 is provided with a vertical segment a and a horizontal segment a, the vertical segment a and the horizontal segment a forming an L-shape, a second mounting hole is provided in the middle of the vertical segment a, the diffuser is fixed in the second mounting hole, a first mounting hole is provided at the lower part of the vertical segment a, a motor is installed on the upper side of the middle of the horizontal segment a, and two first mounting holes are provided at the end of the horizontal segment a away from the vertical segment a. The vibration base is provided with a vertical segment b and a horizontal segment b, the vertical segment b and the horizontal segment b forming an L-shape, a column is vertically provided on the vertical segment b, and two columns are vertically provided at the end of the horizontal segment b away from the vertical segment b.

[0016] This utility model has the following beneficial effects:

[0017] Lower technical difficulty: Compared to laser technology that changes the laser characteristics from the source, a structure to eliminate laser speckle is relatively simple to implement and does not require the development and introduction of special luminescent materials or complex optical systems.

[0018] Lower cost investment: In terms of R&D and production costs, it does not require the large amount of funds and manpower invested in basic research and experimental verification as in developing new laser light source technologies; in terms of equipment maintenance costs, maintenance is intuitive and simple, and the maintenance cost is lower compared to some speckle reduction technologies that use complex optical components or high-precision electronic equipment.

[0019] Significant effect: It can effectively reduce the contrast of speckle, making the speckle significantly weaker in the visual perception of the human eye, and improving the overall uniformity and visual comfort of the image. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a front view of the structure of this utility model.

[0024] In the diagram: 1-scattering plate; 2-eccentric seat; 3-motor; 4-cross screw; 5-conical spring; 6-mounting base one; 7-vibration base. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0026] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0028] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] A structure for eliminating laser speckle includes a motor 3 and a vibration base 7. An eccentric seat 2 is connected to the top of the motor 3. The motor 3 is fixed on a mounting base 6. A scattering plate 1 is fixed on the mounting base 6. The vibration base 7 is elastically connected to the mounting base 6.

[0030] The eccentric seat 2 and the motor 3 are connected by glue, which fixes the eccentric seat 2 and the motor 3 together to ensure their relative positions.

[0031] The bottom of the motor 3 is fixedly connected to the mounting base 6 by screws. In this embodiment, the bottom of the motor 3 is provided with three fixing holes, and the mounting base 6 is provided with corresponding fixing holes at the corresponding positions. The screws are screwed into the fixing holes from the bottom of the mounting base 6 and finally fixed in the fixing holes of the motor 3, so that the motor 3 can be fixed on the mounting base 6.

[0032] The eccentric seat 2 is a circular piece with an eccentric hole. The center of the eccentric seat 2 is provided with a central hole for assembly with the motor 3. The central hole of the eccentric seat 2 is connected to the shaft of the motor 3 by glue.

[0033] It also includes a cross screw 4 and a spring. The mounting base 6 is provided with a mounting hole 1. The vibration base 7 is provided with a column that is inserted into the mounting hole 1. The inside of the column is provided with a thread that mates with the cross screw 4. The spring is sleeved on the outside of the column and is located between the head of the cross screw 4 and the vibration base 7.

[0034] The spring is a conical spring 5. A circular spring slot is provided on the top and / or bottom of the mounting hole. The diameter of the spring slot is larger than the diameter of the mounting hole. The smaller diameter side of the conical spring 5 is smaller than the head diameter of the Phillips screw 4. The larger diameter side of the conical spring 5 is not larger than the diameter of the spring slot and not smaller than the diameter of the column. By setting the spring slot and the column, the relative position of the vibration base 7 and the mounting seat 6 can be ensured, and the vibration of the mounting seat 6 can be limited to a small range. This way, the vibration of the mounting seat 6 is not hindered, and the fixed connection between the vibration base 7 and other places is not damaged.

[0035] Mounting base 6 has a vertical section a and a horizontal section a, which together form an L-shape. A second mounting hole is provided in the middle of the vertical section a, and the diffuser 1 is fixed in the second mounting hole. A first mounting hole is provided at the bottom of the vertical section a. A motor 3 is installed on the upper side of the middle of the horizontal section a. Two first mounting holes are provided at the end of the horizontal section a away from the vertical section a. Vibration base 7 has a vertical section b and a horizontal section b, which together form an L-shape. A column is vertically installed on the vertical section b. Two columns are vertically installed on the end of the horizontal section b away from the vertical section b.

[0036] In this embodiment, a spring slot is provided on one side of the mounting hole on the vertical end a, and spring slots are provided on both sides of the mounting hole on the horizontal section a.

[0037] In this embodiment, one mounting hole requires two conical springs 5. Taking the mounting hole 1 on the horizontal segment a as an example, one is set on the upper side of the mounting base 6 and one is set on the lower side of the mounting base 6, that is, one is set between the head of the cross screw 4 and the mounting base 6. The large diameter side of the conical spring 5 is stuck in the spring slot, and the small diameter side is stuck in the head of the cross screw 4. One is set between the mounting base 6 and the vibration base 7. The large diameter side of the conical spring 5 is stuck in the spring slot, and the small diameter side is stuck at the root of the column.

[0038] Working principle: First, the eccentric seat 2 and the motor 3 are fastened together with glue; then, the eccentric seat 2 and the motor 3 assembly is fixed to the mounting base 6 with screws; the mounting base 6 is fixed to the vibration base 7 with cross screws 4 and conical springs 5.

[0039] In application, the motor 3 is started to drive the eccentric seat 2 to rotate. The rotation of the eccentric seat 2 causes the motor 3 to vibrate. The vibration of the motor 3 causes the mounting base 6 to vibrate, which in turn causes the diffuser 1 to vibrate in a regular manner. When the laser light passes through the diffuser 1, it will destroy the coherence of the speckle, thereby reducing the contrast of the speckle and averaging the speckle within the visual persistence time, reducing the impact of speckle on image quality, and thus achieving the speckle elimination effect.

[0040] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A structure for eliminating laser speckle, characterized in that: It includes a motor (3) and a vibration base (7). The top of the motor (3) is connected to an eccentric seat (2). The motor (3) is fixed on a mounting base (6). A scattering plate (1) is fixed on the mounting base (6). The vibration base (7) is elastically connected to the mounting base (6).

2. The structure for eliminating laser speckle according to claim 1, characterized in that: The eccentric seat (2) is connected to the motor (3) by glue.

3. The structure for eliminating laser speckle according to claim 1, characterized in that: The bottom of the motor (3) is fixedly connected to the mounting base (6) by screws.

4. The structure for eliminating laser speckle according to claim 1, characterized in that: The eccentric seat (2) is a circular piece with an eccentric hole. The center of the eccentric seat (2) is provided with a central hole for assembly with the motor (3). The central hole of the eccentric seat (2) is connected to the shaft of the motor (3) by glue.

5. A structure for eliminating laser speckle according to any one of claims 1-4, characterized in that: It also includes a cross screw (4) and a spring. The mounting base (6) is provided with a mounting hole. The vibration base (7) is provided with a column that fits into the mounting hole. The inside of the column is provided with a thread that mates with the cross screw (4). The spring is sleeved on the outside of the column and is located between the head of the cross screw (4) and the vibration base (7).

6. The structure for eliminating laser speckle according to claim 5, characterized in that: The spring is a conical spring (5), and a circular spring slot is provided on the upper and / or lower part of the mounting hole. The diameter of the spring slot is larger than the diameter of the mounting hole. The smaller diameter side of the conical spring (5) is smaller than the head diameter of the cross screw (4). The larger diameter side of the conical spring (5) is not larger than the diameter of the spring slot and not smaller than the diameter of the column.

7. The structure for eliminating laser speckle according to claim 6, characterized in that: The mounting base (6) is provided with a vertical section a and a horizontal section a, which form an L-shape. The vertical section a is provided with a second mounting hole in the middle, and the diffuser (1) is fixed in the second mounting hole. The lower part of the vertical section a is provided with a first mounting hole. The upper part of the middle of the horizontal section a is provided with a motor (3). The end of the horizontal section a away from the vertical section a is provided with two first mounting holes. The vibration base (7) is provided with a vertical section b and a horizontal section b, which form an L-shape. A column is vertically provided on the vertical section b, and two columns are vertically provided on the end of the horizontal section b away from the vertical section b.

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