A reading and writing desk

Abstract

This utility model belongs to the technical field of auxiliary reading and writing tools, and provides a reading and writing table, including: a main body; a projection component, which is disposed on the main body, including a light source disposed below the main body, and a beam splitter and a spherical reflector disposed along the line of sight. The beam splitter is obliquely disposed on the main body. The light source, beam splitter, and spherical reflector are used to image a reading material placed below the main body along the vertical line of sight; an adjustment plate, which is replaceably connected to the main body along the line of sight. When the adjustment plate is installed on the main body, it is disposed opposite to the light source. The adjustment plate is used to adjust the image after imaging. Compared with the prior art, the adjustment plate of this utility model adopts a replaceable connection method. Users can quickly replace the adjustment plate with different optical characteristics according to different usage needs (such as visual training, vision correction, etc.), which significantly improves the functional diversity and applicability of the device.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary reading and writing tools, and specifically relates to a reading and writing station. Background Technology

[0002] In existing reader / writer designs, the adjustment plate is typically fixed in a relatively simple way, mainly using screws, clips, or other mechanical fasteners to attach it to the main body. While this traditional method can meet basic stability and security requirements, it is significantly inadequate in adapting to the specific needs of different users.

[0003] First, traditional fixed methods often lack flexibility. Once the adjustment plate is installed, its position and angle are difficult to adjust according to personal preference or the needs of a specific task. When it is necessary to replace the adjustment plate with one that has different optical characteristics for different purposes (such as vision training, vision correction, etc.), the user must use tools to remove the original adjustment plate and then precisely install the new one. This not only increases the difficulty of operation but may also lead to a decrease in adjustment accuracy, affecting image quality. In addition, frequent disassembly and assembly may also accelerate component wear and shorten the lifespan of the equipment.

[0004] In conclusion, current reading and writing desks on the market have many limitations in the way their adjustment panels are fixed, making it difficult to meet the increasingly diverse needs of users. Therefore, it is particularly important to develop a new type of reading and writing desk that is flexible, easy to operate, and meets the requirements of lightweight and environmental protection. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a reader / writer in light of the current state of the technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a reading and writing station is proposed, comprising: a main body;

[0007] A projection assembly is disposed on the main body, including a light source disposed below the main body, and a beam splitter and a spherical reflector disposed along the line of sight. The beam splitter is obliquely disposed on the main body. The light source, the beam splitter, and the spherical reflector are used to image a reading material placed below the main body along the vertical line of sight.

[0008] An adjustment plate is interchangeably connected to the main body along the line of sight, and when the adjustment plate is installed on the main body, it is positioned opposite to the light source. The adjustment plate is used to adjust the image after imaging.

[0009] In the aforementioned reading and writing station, slots are provided on both sides of the main body along the line of sight, and the adjustment plate is provided with insertion parts corresponding to the slots one by one, the insertion parts being movably engaged in the slots.

[0010] In the aforementioned reading and writing station, several spring contacts are provided on the side wall of each of the two plug-in portions that are relatively far apart.

[0011] The spring can elastically deform when the adjusting plate is inserted into the main body, and converge toward the insertion part, allowing the adjusting plate to enter the main body. When the adjusting plate is installed in the preset position, it abuts against the slot to fix the adjusting plate in the main body.

[0012] In one of the aforementioned reading and writing stations, the cross-section of the spring is arc-shaped, and one end along the line of sight is fixed to the plug-in part, while the other end has a gap with the plug-in part.

[0013] In the aforementioned reader / writer, each of the plug-in portions is provided with four spring contacts, the four spring contacts on two plug-in portions correspond one-to-one, and the line connecting them is perpendicular to the line of sight.

[0014] This utility model also proposes a reader / writer to solve the above-mentioned technical problems, including:

[0015] The optical path is extended, which includes a light source, a beam splitter, and a spherical reflector. The beam splitter is tilted, the spherical reflector is located on one side of the beam splitter, and the beam splitter and the spherical reflector are arranged sequentially along the line of sight. The light source is located below the beam splitter and is used to emit light to a reading material placed below the beam splitter.

[0016] The defocusing optical path includes a defocusing functional plate disposed above the beam splitter. The defocusing functional plate is integrally injection molded and has a spherical shape on the side facing the beam splitter. A first reflection area is provided on the side of the defocusing functional plate facing the beam splitter. The first reflection area, the light source, and the beam splitter form the defocusing optical path.

[0017] In the aforementioned reading and writing station, the peripheral area of ​​the defocusing functional board is provided with multiple arc-shaped first reflective areas from the inside out, and the width of each first reflective area gradually increases from the center outwards.

[0018] This utility model also proposes a reader / writer to solve the above-mentioned technical problems, including:

[0019] The optical path is extended, which includes a light source, a beam splitter, and a spherical reflector. The beam splitter is tilted, the spherical reflector is located on one side of the beam splitter, and the beam splitter and the spherical reflector are arranged sequentially along the line of sight. The light source is located below the beam splitter and is used to emit light to a reading material placed below the beam splitter.

[0020] A point diffusion optical path includes a point diffusion functional plate disposed above the beam splitter. The point diffusion functional plate is integrally injection molded and has a spherical shape on the side facing the beam splitter. A second reflection area is provided on the side of the point diffusion functional plate facing the beam splitter. The second reflection area, the light source, and the beam splitter form the point diffusion optical path.

[0021] In the aforementioned reading and writing station, the peripheral area of ​​the dot diffusion functional plate is provided with multiple ring-shaped second reflective areas from the inside out. Each second reflective area is provided with multiple dots, and the diameter of the dots gradually increases from the center outwards. The reflectivity of the second reflective area is less than 10%, and the reflectivity of the multiple dots is 5% to 20%.

[0022] In one of the aforementioned reading and writing stations, the beam splitter has semi-reflective and semi-transparent optical characteristics, with a reflectivity controlled at 50% to 70% and a transmittance of 20% to 40%.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The adjustment plate adopts a replaceable connection method, and users can quickly replace the adjustment plate with different optical characteristics according to different usage needs (such as vision training, vision correction, etc.), which significantly improves the functionality and applicability of the equipment.

[0025] (2) By setting a structure that matches the slot and the plug, the adjustment plate can be quickly installed or removed by plugging and unplugging, and can be replaced without the need for additional tools, which greatly improves the user's ease of operation.

[0026] (3) The introduction of the spring plate structure further enhances the stability and self-locking performance of the adjustment plate installation. During the insertion process, the spring plate undergoes elastic deformation due to the force, allowing the adjustment plate to enter smoothly. After reaching the predetermined position, the spring plate automatically resets and fits tightly with the slot, forming a reliable locking state. This adaptive locking mechanism effectively avoids the risk of detachment caused by accidental contact, and improves the reliability and service life of the overall structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a reader / writer in use according to this utility model.

[0028] Figure 2This is a perspective view of a reading and writing station according to this utility model.

[0029] Figure 3 yes Figure 2 The 3D view after the adjustment plate is omitted.

[0030] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0031] Figure 5 This is a 3D view of the adjustment plate.

[0032] Figure 6 This is a three-dimensional view of the adjustment plate from another direction.

[0033] Figure 7 yes Figure 6 A magnified view of a section at point B.

[0034] In the diagram, 100 is the main body; 110 is the card slot; 200 is the projection component; 210 is the light source; 220 is the beam splitter; 230 is the spherical reflector; 300 is the adjustment plate; 310 is the insertion part; 320 is the spring; 330 is the gap; 340 is the spherical surface; 350 is the first reflection zone; 360 is the outer surface; and 400 is the reading material. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. Example

[0037] like Figures 1 to 7 As shown, a reading and writing station in this embodiment includes: a main body 100, a projection component 200, and an adjustment plate 300.

[0038] Specifically, the projection assembly 200 is mounted on the main body 100, including a light source 210 positioned below the main body 100, a beam splitter 220 and a spherical reflector 230 positioned along the line of sight. The beam splitter 220 is tilted on the main body 100. The light source 210, beam splitter 220 and spherical reflector 230 are used to image the reading material 400 placed below the main body 100 along the vertical line of sight. An adjustment plate 300 is interchangeably connected to the main body 100 along the line of sight. When the adjustment plate 300 is mounted on the main body 100, it is positioned opposite to the light source 210. The adjustment plate 300 is used to adjust the image after imaging.

[0039] In this solution, the adjustment plate 300 adopts a replaceable connection method, allowing users to quickly replace the adjustment plate 300 with different optical characteristics according to different usage needs (such as vision training, vision correction, etc.), significantly improving the functionality and applicability of the equipment. Compared with the traditional fixed or tool-required adjustment plate 300 structure, this solution greatly simplifies the replacement process and improves the convenience and flexibility of use.

[0040] Furthermore, the main body 100 has slots 110 on both sides of the side wall along the line of sight, and the adjustment plate 300 has a plug-in part 310 corresponding to the slot 110. The plug-in part 310 is movably engaged in the slot 110.

[0041] The slot 110 and the main body 100 can be integrally formed or separate. By designing a structure where the slot 110 mates with the insertion part, the adjustment plate 300 can be quickly installed or removed via a plug-in method, allowing for replacement without the need for additional tools, greatly improving user convenience. This structure not only ensures the stability of the adjustment plate 300 installation but also effectively prevents loosening and detachment, balancing safety and ease of use.

[0042] Furthermore, under the premise that the adjustment plate 300 and the main body 100 can be quickly inserted, the adjustment plate 300 is prone to shaking when inserted into the main body 100, making it difficult to fix securely, which seriously affects the normal use of the reading and writing station. To solve this problem, this solution provides several spring pieces 320 on the side wall of each of the two insertion parts that are relatively far apart. The spring pieces 320 can elastically deform when the adjustment plate 300 is inserted into the main body 100, converging towards the insertion part, thereby allowing the adjustment plate 300 to smoothly enter the main body 100; when the adjustment plate 300 is installed in the preset position, the spring pieces 320 return to their original shape and tightly abut against the slot 110, so as to firmly fix the adjustment plate 300 to the main body 100.

[0043] The introduction of the spring clip 320 structure further enhances the stability and self-locking performance of the adjustment plate 300 during installation. During insertion, the spring clip 320 undergoes elastic deformation under force, allowing the adjustment plate 300 to enter smoothly. Upon reaching the predetermined position, the spring clip 320 automatically resets and tightly engages with the slot 110, forming a reliable locking state. This adaptive locking mechanism effectively avoids the risk of accidental dislodgement, improving the overall reliability and service life of the structure.

[0044] In this design, the cross-section of the spring piece 320 is arc-shaped, and one end along the line of sight is fixed to the insertion part 310, while the other end has a gap 330 with the insertion part 310.

[0045] The curved cross-section design makes it easier for the spring 320 to deform evenly under stress, thereby improving its resilience and durability. Furthermore, the curved cross-section design of the spring 320 helps reduce the contact area between it and the slot 110, thus reducing friction between them. In addition, the gap 330 between the free end and the insertion part provides sufficient deformation space for the spring 320, preventing breakage or functional failure due to excessive compression, thus helping to extend the service life of the component and enhance the stability and reliability of the overall structure.

[0046] Preferably, each plug part is provided with four spring pieces 320, the four spring pieces 320 on the two plug parts correspond one to one, and the line connecting them is perpendicular to the line of sight.

[0047] Multiple spring clips 320 are installed on the insertion part to enhance the clamping force and positioning accuracy of the adjustment plate 300 during installation, thereby ensuring that the adjustment plate 300 is installed firmly and is not easy to shake. This four-point distribution method not only ensures structural strength but also avoids assembly difficulties, making it a simple and effective optimization solution.

[0048] Preferably, the end of the adjustment plate 300 furthest from the main body 100 is provided with an appearance surface 360, which is formed by injection molding or sticker application. The design of the appearance surface 360 ​​enhances the overall aesthetics of the device and meets users' aesthetic requirements for product appearance. At the same time, this surface can also serve as an operating interface or label display area, effectively enhancing the human-computer interaction experience and making the device more approachable and easily recognizable. Example

[0049] The reading and writing station of this embodiment includes: a long optical path, which includes a light source 210, a beam splitter 220 and a spherical reflector 230. The beam splitter 220 is tilted and the spherical reflector 230 is disposed on one side of the beam splitter 220. The beam splitter 220 and the spherical reflector 230 are arranged sequentially along the line of sight. The light source 210 is disposed below the beam splitter 220 and is used to emit light to the reading material 400 placed below the beam splitter 220.

[0050] The defocusing optical path includes a defocusing functional plate disposed above the beam splitter 220. The defocusing functional plate is integrally injection molded and has a spherical shape 340 on the side facing the beam splitter 220. A first reflection area 350 is provided on the side of the defocusing functional plate facing the beam splitter 220. The first reflection area 350, the light source 210 and the beam splitter 220 form the defocusing optical path.

[0051] In this embodiment, a dual-optical-path system consisting of a telephoto optical path and a defocus optical path enables simultaneous imaging of the distant image of the reading material 400 and generation of a defocus signal. The defocus functional plate employs a one-piece injection-molded spherical structure 340, ensuring the optical stability of the reflective area and avoiding optical path offset problems that may occur with traditional split structures. The synergistic effect of the first reflective area 350, the light source 210, and the beam splitter 220 precisely controls the generation position and intensity of the defocus signal, thereby forming a stable myopic defocus in the peripheral retina, effectively inhibiting scleral fibroblast proliferation and delaying excessive axial growth. Furthermore, the tilted setting of the beam splitter 220 and the rational layout of the spherical reflector 230 further optimize the light path, improving overall image clarity and the uniformity of the defocus effect.

[0052] Furthermore, the peripheral area of ​​the defocusing function plate is provided with multiple arc-shaped first reflective areas 350 from the inside out, and the width of the first reflective areas 350 gradually increases from the center outwards.

[0053] By setting an arc-shaped first reflective zone 350 with increasing width from the inside out in the peripheral area of ​​the defocusing functional plate, a gradient distribution of the defocus signal can be achieved. This design makes the intensity of defocus stimulation in the peripheral retina gradually increase from the center outward, which is more in line with the natural distribution pattern of the eye's physiological structure. The progressive width design of the arc-shaped reflective zone not only improves the spatial coverage of the defocus signal, but also adapts to the personalized needs of different users by dynamically adjusting the density and shape of the reflective zone, thereby significantly improving the myopia control effect. In addition, the asymmetrical distribution of the arc-shaped reflective zone can avoid the problem of excessive local light intensity, further optimizing visual comfort.

[0054] In this embodiment, the non-transparent area of ​​the spherical surface 340 of the defocusing functional plate is treated with matte black paint or a matte texture to improve visual contrast and optical performance. The first reflective area 350 is prepared by a vacuum coating process. Specifically, the first transparent area adopts a 3-16 layer coating structure, and the coating materials and their thicknesses are as follows: silicon dioxide film thickness is 20nm-60nm, titanium dioxide film thickness is 40nm-60nm, zirconium oxide-alumina composite film thickness is 10nm-35nm, and aluminum film thickness is 70nm-200nm. This multi-layer coating structure enables the defocusing functional plate to achieve defocusing function, thereby being used for specific visual training or correction purposes.

[0055] Reference Figure 1The working principle of this reading and writing station is as follows: The reading material 400 (book or tablet) is placed below the main body 100. The light source 210, beam splitter 220, and reflector work together to image the content on the reading material 400, ensuring the image is directly facing the user's line of sight, creating a distance effect and increasing the distance between the reader and the reading material 400. When the main body 100 is equipped with an adjustment plate 300 containing a first reflective area 350, the reading and writing station achieves defocusing, thus enabling it to be used for specific vision training or correction purposes. Example

[0056] The reading and writing station of this embodiment includes: a long optical path, which includes a light source 210, a beam splitter 220 and a spherical reflector 230. The beam splitter 220 is tilted and the spherical reflector 230 is disposed on one side of the beam splitter 220. The beam splitter 220 and the spherical reflector 230 are arranged sequentially along the line of sight. The light source 210 is disposed below the beam splitter 220 and is used to emit light to the reading material 400 placed below the beam splitter 220.

[0057] The point diffusion optical path includes a point diffusion functional plate disposed above the beam splitter 220. The point diffusion functional plate is integrally injection molded and has a spherical shape 340 on the side facing the beam splitter 220. A second reflection area is provided on the side of the point diffusion functional plate facing the beam splitter 220. The second reflection area, the light source 210 and the beam splitter 220 form the point diffusion optical path.

[0058] In this embodiment, a dual-optical-path system consisting of a telescopic optical path and a dot-diffusion optical path enables simultaneous imaging of the distant image of the reading material 400 and simulation of a low-contrast environment. The dot-diffusion functional board adopts a one-piece injection-molded spherical 340 structure, ensuring optical consistency in the scattering area and avoiding optical path interference problems that may occur with traditional split structures. The synergistic effect of the second reflection area, the light source 210, and the beam splitter 220 can reduce the contrast signal received by the retina by scattering light, simulating the low-contrast state of a natural outdoor environment, thereby suppressing abnormal elongation of the eye axis caused by high-contrast stimulation. In addition, the rational layout of the spherical reflector 230 further optimizes the light path and improves the stability and uniformity of the dot-diffusion effect.

[0059] In this embodiment, the entire spherical surface 340 is coated with a matte paint suitable for laser engraving. This matte paint has excellent laser absorption properties, facilitating the removal of the coating from designated areas using laser technology. The second reflective area has its surface paint removed via laser engraving, revealing the original substrate color, thus achieving a contrast effect. The reflectivity of the coated area (second reflective area) is controlled below 10%, and the reflectivity of the exposed substrate area (dots) after laser engraving is controlled between 5% and 20%, enabling the adjustment plate 300 to possess a dot diffusion (DOT) function, which can be used to improve visual focusing ability or for specific optical training.

[0060] Furthermore, the peripheral area of ​​the dot diffusion functional plate is provided with multiple ring-shaped second reflective zones from the inside out. Each second reflective zone is provided with multiple dots, and the diameter of the dots gradually increases from the center outwards.

[0061] By setting up a ring-shaped second reflection zone with an increasing diameter from the inside out in the peripheral area of ​​the dot diffusion functional panel, a gradient distribution of scattered signals can be achieved. The increasing diameter design of the ring-shaped reflection zone makes the scattered light intensity gradually increase from the center outward, which is more in line with the distribution pattern of light in the natural environment. The increasing diameter of the scattering points within each second reflection zone further optimizes the scattering angle and coverage of light, thereby effectively reducing the contrast signal intensity in the peripheral area of ​​the retina. This design not only enhances the inhibitory effect of the dot diffusion function on abnormal axial elongation, but also adapts to the personalized needs of different users by dynamically adjusting the density and shape of the scattering points, significantly improving the flexibility and applicability of myopia control.

[0062] Reference Figure 1 The working principle of this reader / writer station is as follows: The reading material 400 is placed below the main body 100. The light source 210, beam splitter 220, and reflector work together to image the content on the reading material 400, ensuring that the image is directly facing the user's line of sight. When the main body 100 is equipped with an adjustment plate 300 having a second reflective zone, the reader / writer station has a dot diffusion (DOT) function, which can be used to improve visual focusing ability or to perform specific types of optical training.

[0063] Preferably, the beam splitter 220 has semi-reflective and semi-transparent optical characteristics, with its reflectivity controlled at 50% to 70% and its transmittance controlled at 20% to 40%.

[0064] By controlling the reflectivity of the beam splitter 220 between 50% and 70% (semi-reflective and semi-transparent characteristics), the light distribution ratio between the telescopic optical path and the defocus / spot diffusion optical path can be balanced. Precise control of reflectivity ensures the clarity of the distant image and the intensity of the defocus / spot diffusion signal, avoiding visual fatigue caused by excessively strong or weak light. Controlling the transmittance between 20% and 40% further optimizes the light energy utilization of the dual-optical-path system and reduces unnecessary light loss. This design not only improves the overall optical performance of the reader / writer but also adapts to different ambient light conditions by dynamically adjusting the reflectivity / transmittance ratio of the beam splitter 220, significantly enhancing the device's practicality and user experience.

[0065] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0067] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A read / write station, characterized in that include: main body; A projection assembly is disposed on the main body, including a light source disposed below the main body, and a beam splitter and a spherical reflector disposed along the line of sight. The beam splitter is obliquely disposed on the main body. The light source, the beam splitter, and the spherical reflector are used to image a reading material placed below the main body along the vertical line of sight. An adjustment plate is interchangeably connected to the main body along the line of sight, and when the adjustment plate is installed on the main body, it is positioned opposite to the light source. The adjustment plate is used to adjust the image after imaging.

2. A station as claimed in claim 1, characterized in that The main body has slots on both sides of the side wall along the line of sight, and the adjustment plate has a plug-in part that corresponds to each slot. The plug-in part is movably engaged in the slot.

3. A station as claimed in claim 2, characterised in that, Several spring clips are provided on the side wall of each of the two plug-in parts that are relatively far apart; The spring can elastically deform when the adjusting plate is inserted into the main body, and converge toward the insertion part, allowing the adjusting plate to enter the main body. When the adjusting plate is installed in the preset position, it abuts against the slot to fix the adjusting plate in the main body.

4. A station as claimed in claim 3, characterised in that, The cross-section of the spring is arc-shaped, and one end along the line of sight is fixed to the insertion part, while the other end has a gap with the insertion part.

5. A station as claimed in claim 3, characterized in that Each of the plug-in parts is provided with four spring contacts, and the four spring contacts on two plug-in parts correspond one-to-one, and the line connecting them is perpendicular to the line of sight.

6. A read / write station, characterized by include: The optical path is extended, which includes a light source, a beam splitter, and a spherical reflector. The beam splitter is tilted, the spherical reflector is located on one side of the beam splitter, and the beam splitter and the spherical reflector are arranged sequentially along the line of sight. The light source is located below the beam splitter and is used to emit light to a reading material placed below the beam splitter. The defocusing optical path includes a defocusing functional plate disposed above the beam splitter. The defocusing functional plate is integrally injection molded and has a spherical shape on the side facing the beam splitter. A first reflection area is provided on the side of the defocusing functional plate facing the beam splitter. The first reflection area, the light source, and the beam splitter form the defocusing optical path.

7. A reader / writer as described in claim 6, characterized in that, The defocusing functional plate has multiple arc-shaped first reflective areas arranged from the inside out in its peripheral area, and the width of each first reflective area gradually increases from the center outwards.

8. A reading and writing station, characterized in that, include: The optical path is extended, which includes a light source, a beam splitter, and a spherical reflector. The beam splitter is tilted, the spherical reflector is located on one side of the beam splitter, and the beam splitter and the spherical reflector are arranged sequentially along the line of sight. The light source is located below the beam splitter and is used to emit light to a reading material placed below the beam splitter. A point diffusion optical path includes a point diffusion functional plate disposed above the beam splitter. The point diffusion functional plate is integrally injection molded and has a spherical shape on the side facing the beam splitter. A second reflection area is provided on the side of the point diffusion functional plate facing the beam splitter. The second reflection area, the light source, and the beam splitter form the point diffusion optical path.

9. A reader / writer as described in claim 8, characterized in that, The peripheral area of ​​the dot diffusion functional plate is provided with multiple ring-shaped second reflective areas from the inside to the outside. Each second reflective area is provided with multiple dots. The diameter of the dots gradually increases from the center to the outside. The reflectivity of the second reflective area is less than 10%, and the reflectivity of the multiple dots is 5% to 20%.

10. A reader / writer as described in claim 7 or 9, characterized in that, The beam splitter has semi-reflective and semi-transparent optical characteristics, with a reflectivity controlled at 50% to 70% and a transmittance of 20% to 40%.

Images