Focusing suspension fiber and torquer in holographic storage system

Abstract

The utility model relates to a focusing suspension wire and a torquer in a holographic storage system, the focusing suspension wire is applied to the torquer of the holographic storage system, and the focusing suspension wire comprises a first line segment, a second line segment and a third line segment which are arranged on the same straight line; the first bending part is arranged between the first line segment and the second line segment; the second bending part is arranged between the second line segment and the third line segment; the first bending part and the second bending part are symmetrically arranged, each of the first bending part and the second bending part is composed of three bending line segments, the included angle between the first bending part and the first line segment and the included angle between the second bending part and the second line segment are both larger than 90 degrees, and the included angle between the second bending part and the second line segment and the included angle between the second bending part and the third line segment are both larger than 90 degrees. Therefore, the rigidity of the second line segment in the tracking direction can be effectively improved, and the rigidity in the focusing direction is not changed, so that the function of synchronous movement of the objective lens and the reflector in the tracking direction is realized.

Description

Technical Field

[0001] This application relates to the field of optical technology, specifically to a torque device in a focusing suspension wire and holographic storage system. Background Technology

[0002] In holographic storage, data is stored in the form of holograms in a medium (such as photopolymer organic materials). The reading and writing process requires high-precision optical head control, such as controlling the micro-displacement of the objective lens or mirror to ensure that the laser beam is accurately aligned with a specific position in the storage medium, and to compensate for minor deviations caused by medium jitter or thermal drift, maintaining stable alignment between the beam and the hologram. The torque device is the core component in the holographic storage system used to control the precise positioning of the optical head, and its performance directly affects the tracking speed, positioning accuracy, and data reading and writing reliability that the storage system can achieve.

[0003] like Figure 1 As shown, the torque in the existing holographic storage system uses a suspension wire with four circular arcs symmetrically distributed. Due to the characteristics of holographic storage, the torque must ensure that the reflector and the objective lens move synchronously in the tracking direction, but the existing focusing suspension wire with four circular arcs symmetrically distributed cannot meet this requirement well. Utility Model Content

[0004] In view of the above problems, this application provides a focusing suspension wire and a torque device in a holographic storage system, which solves the problem that the focusing suspension wire with a four-circular arc symmetrical distribution in the torque device of the existing holographic storage system cannot guarantee the synchronous movement of the reflecting mirror and the objective lens in the tracking direction.

[0005] To achieve the above objectives, the inventors provide a focusing suspension wire, which is used as a torque device in a holographic storage system, comprising:

[0006] The first, second, and third line segments are set on the same straight line; and

[0007] The first bend is disposed between the first line segment and the second line segment;

[0008] The second bend is disposed between the second line segment and the third line segment;

[0009] The first and second bending portions are symmetrically arranged. Both the first and second bending portions are composed of three bending line segments. The angle between the first bending portion and the connection points of the first and second line segments is greater than 90 degrees, and the angle between the second bending portion and the connection points of the second and third line segments is greater than 90 degrees.

[0010] In some embodiments, the first bending portion includes a first bending segment, a second bending segment, and a third bending segment connected in sequence. The first bending segment is connected to the second segment, and the third bending segment is connected to the first segment. The angle between the first bending segment and the second bending segment is greater than 90 degrees, and the angle between the second bending segment and the third bending segment is greater than 90 degrees.

[0011] The second bending portion includes a fourth bending segment, a fifth bending segment, and a sixth bending segment connected in sequence. The fourth bending segment is connected to the second segment, and the sixth bending segment is connected to the third segment. The angle between the fourth bending segment and the fifth bending segment is greater than 90 degrees, and the angle between the fifth bending segment and the sixth bending segment is greater than 90 degrees.

[0012] In some embodiments, the included angles between the first and second bent segments, the second and third bent segments, the fourth and fifth bent segments, and the fifth and sixth bent segments are all rounded.

[0013] In some embodiments, the lengths of the first bending segment and the third bending segment are equal, and the lengths of the fourth bending segment and the sixth bending segment are equal.

[0014] In some embodiments, the cross-sections of the first line segment, the second line segment, the third line segment, the first bend, and the second bend are all rectangular.

[0015] In some embodiments, the aspect ratio of the rectangle is 2:1.

[0016] In some embodiments, the length of the second line segment is shorter than the lengths of the first line segment and the third line segment.

[0017] Another technical solution is also provided: a torque device in a holographic storage system, the torque device including a focusing suspension wire, the focusing suspension wire being the focusing suspension wire described above.

[0018] Unlike existing technologies, the above-mentioned technical solution sets the first, second, and third segments of the focusing suspension wire on the same straight line. Simultaneously, it symmetrically sets a first bend and a second bend at both ends of the second segment, setting the angle between the first bend and the first and second segments to be greater than 90 degrees, and the angle between the second bend and the second and third segments to be greater than 90 degrees. Both the first and second bends consist of three bends, forming a four-triangular symmetrically distributed suspension wire. This effectively improves the stiffness of the second segment in the tracking direction without changing the stiffness in the focusing direction, thereby achieving synchronous movement of the objective lens and the mirror in the tracking direction.

[0019] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0020] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0021] In the accompanying drawings of the instruction manual:

[0022] Figure 1 This is a structural attempt of the four-circular-arc symmetrically distributed focusing suspension wire described in the background art;

[0023] Figure 2 This is a schematic diagram of a structure of the focusing suspension wire described in a specific embodiment;

[0024] Figure 3 This is a deformation diagram of the existing focusing wire, which is symmetrically distributed with four circular arcs, when a focusing directional force is applied to the middle region of the focusing wire as described in the specific implementation method.

[0025] Figure 4 This is a schematic diagram of deformation when a focusing force is applied to the middle region of the four triangularly symmetrically distributed focusing wires as described in the specific embodiment.

[0026] Figure 5 This is a schematic diagram of the deformation of a focusing wire that is symmetrically distributed with four circular arcs when a tracking force is applied to the middle region of the wire in the specific implementation method.

[0027] Figure 6 A deformation diagram of the focusing suspension wire with four triangular symmetrical distribution as described in the specific embodiment when a tracking direction force is applied to the middle region of the focusing suspension wire;

[0028] Figure 7 This is a schematic diagram of the torque device of the holographic storage system described in a specific embodiment.

[0029] The reference numerals used in the above figures are explained as follows:

[0030] 100. Focused suspension wire,

[0031] 110, First line segment; 120, Second line segment; 130, Third line segment; 140, First bend; 141, First bend line segment; 142, Second bend line segment; 143, Third bend line segment; 150, Second bend; 151, Fourth bend line segment; 152, Fifth bend line segment; 153, Sixth bend line segment;

[0032] 211. Objective lens, 212. Focusing coil, 213. Objective lens torque device, 214. Yoke, 215. Magnet, 216. Tracking coil, 217. Overall torque device, 218. Tracking suspension wire, 219. Mirror, 220. Metal frame. Detailed Implementation

[0033] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended only as examples, not as limiting the scope of protection of this application.

[0034] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0035] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0037] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order between these entities or operations.

[0038] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0039] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0040] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] Please see Figure 2 This embodiment provides a focusing suspension wire, which is used as a torque device in a holographic storage system, comprising:

[0043] The first segment 110, the second segment 120, and the third segment 130 are set on the same straight line; and

[0044] The first bending portion 140 is disposed between the first line segment 110 and the second line segment 120;

[0045] The second bending portion 150 is disposed between the second line segment 120 and the third line segment 130;

[0046] The first bending portion 140 and the second bending portion 150 are symmetrically arranged. Both the first bending portion 140 and the second bending portion 150 are composed of three bending line segments. The included angle between the first bending portion 140 and the first line segment 110 and the second line segment 120 is greater than 90 degrees. The included angle between the second bending portion 150 and the second line segment 120 and the third line segment 130 is also greater than 90 degrees.

[0047] By setting the first segment 110, the second segment 120, and the third segment 130 of the focusing suspension wire on the same straight line, and symmetrically setting the first bending portion 140 and the second bending portion 150 at both ends of the second segment 120, and setting the included angle formed by connecting the first bending portion 140 with the first segment 110 and the second segment 120 to be greater than 90 degrees, and setting the included angle formed by connecting the second bending portion 150 with the second segment 120 and the third segment 130 to be greater than 90 degrees, the first bending portion 140 and the second bending portion 150 are each composed of three bending segments, forming a four-triangular symmetrically distributed suspension wire, the stiffness of the second segment 120 in the tracking direction can be effectively improved without changing the stiffness in the focusing direction, thereby realizing the function of synchronous movement of the objective lens and the mirror in the tracking direction.

[0048] In some embodiments, the first bending portion 140 includes a first bending segment 141, a second bending segment 142, and a third bending segment 143 connected in sequence. The first bending segment 141 is connected to the second segment 120, and the third bending segment 143 is connected to the first segment 110. The angle between the first bending segment 141 and the second bending segment 142 is greater than 90 degrees, and the angle between the second bending segment 142 and the third bending segment 143 is greater than 90 degrees.

[0049] The second bending portion 150 includes a fourth bending segment 151, a fifth bending segment 152, and a sixth bending segment 153 connected in sequence. The fourth bending segment 151 is connected to the second segment 120, and the sixth bending segment 153 is connected to the third segment 130. The angle between the fourth bending segment 151 and the fifth bending segment 152 is greater than 90 degrees, and the angle between the fifth bending segment 152 and the sixth bending segment 153 is greater than 90 degrees.

[0050] The first bending section 140 is composed of a first bending segment 141, a second bending segment 142, and a third bending segment 143, with the included angle between the first bending segment 141 and the second bending segment 142 set to be greater than 90 degrees, and the included angle between the second bending segment 142 and the third bending segment 143 set to be greater than 90 degrees. The second bending section 150 is composed of a fourth bending segment 151, a fifth bending segment 152, and a sixth bending segment 153, with the included angle between the fourth bending segment 151 and the fifth bending segment 152 set to be greater than 90 degrees, and the included angle between the fifth bending segment 152 and the sixth bending segment 153 set to be greater than 90 degrees. The larger angles make the focusing suspension wire more rigid in the tracking direction.

[0051] In some embodiments, the included angles between the first bent segment 141 and the second bent segment 142, the included angles between the second bent segment 142 and the third bent segment 143, the included angles between the fourth bent segment 151 and the fifth bent segment 152, and the included angles between the fifth bent segment 152 and the sixth bent segment 153 are all rounded.

[0052] By making the included angles between the first bending segment 141 and the second bending segment 142, the second bending segment 142 and the third bending segment 143, the fourth bending segment 151 and the fifth bending segment 152, and the fifth bending segment 152 and the sixth bending segment 153 all rounded, when a force is applied in the tracking direction, the included angles between the first bending segment 141 and the second bending segment 142, the second bending segment 142 and the third bending segment 143, the fourth bending segment 151 and the fifth bending segment 152, and the fifth bending segment 152 and the sixth bending segment 153 are rounded, which can effectively disperse the force of these included angles in the tracking direction and further improve the rigidity of the focusing suspension wire.

[0053] In some embodiments, the lengths of the first bending segment 141 and the third bending segment 143 are equal, and the lengths of the fourth bending segment 151 and the sixth bending segment 153 are equal. Simultaneously, by ensuring that the lengths of the first bending segment 141 and the third bending segment 143 are equal, and the lengths of the fourth bending segment 151 and the sixth bending segment 153 are equal, the force in the tracking direction can be evenly distributed across these bending segments, further enhancing the rigidity of the focusing wire.

[0054] In some embodiments, the cross-sections of the first line segment 110, the second line segment 120, the third line segment 130, the first bend 140, and the second bend 150 are all rectangular. Using a rectangular cross-section for the focusing wire allows for high lateral rigidity and strong bending resistance. In other embodiments, the cross-section of the focusing wire can also be circular or elliptical.

[0055] In some embodiments, the aspect ratio of the cross-section of the focusing wire is 2:1. In other embodiments, other aspect ratios may be used for the cross-section of the focusing wire.

[0056] In some embodiments, the length of the second segment 120 is shorter than the lengths of the first segment 110 and the third segment 130. By setting the length of the second segment 120 to be shorter than that of the first segment 110 and the second segment 120, the rigidity of the second segment 120 can be effectively improved while keeping the overall length of the focusing suspension wire unchanged.

[0057] In some embodiments, such as Figure 3-4 As shown in the figure, finite element analysis reveals that when the same magnitude and focusing direction force is applied to the middle region of both the existing four-circle symmetrically distributed focusing wire and the improved four-triangular symmetrically distributed focusing wire, the deformation of the middle region of the two types of focusing wires is not significantly different. This indicates that the objective lens's motion in the focusing direction is not affected by the change in the focusing wire. However, as... Figure 5-6 As shown, when the same magnitude and tracking direction force are applied to the middle region of the two suspension wires, the deformation of the middle region of the two suspension wires differs by about 3 times. According to the stiffness formula: stiffness in a certain direction = (force in a certain direction / deformation in that direction), it means that the stiffness of the objective lens in the tracking direction is improved due to the change in the suspension wire structure, thereby achieving a better synchronization effect between the objective lens and the mirror.

[0058] By designing the focusing suspension wire required for the torque generator in the holographic storage system, a better synchronous movement effect between the objective lens and the mirror was achieved without significantly altering the objective lens movement or increasing the material used for the focusing suspension wire.

[0059] In another embodiment, such as Figure 7As shown, the torque device in the holographic storage system consists of an objective lens 211, a focusing coil 212, an objective lens torque device 213, a focusing wire 100, a yoke 214, a magnet 215, a tracking coil 216, an overall torque device 217, a tracking wire 218, a mirror 219, and a metal frame 220. The objective lens 211, focusing coil 212, objective lens torque device 213, focusing wire 100, yoke 214, magnet 215, tracking coil 216, and overall torque device... 217. The tracking wire 218 and the reflecting mirror 219 are all housed within the metal frame 220. The objective lens 211 is mounted on the objective lens torquer 213, and the focusing coil 212 is positioned between the objective lens torquer 213 and the overall torquer 217. There are four focusing wires 100, distributed in pairs on both sides of the objective lens 211, with both ends of the focusing wires 100 riveted to the overall torquer 217. The reflecting mirror 219 is mounted on the overall torquer 217 and can... The mirror 219 rotates relative to the overall torque device 217, changing the direction of the light path so that the light can accurately pass through the objective lens 211; there are four tracking coils 216, arranged in pairs on both sides of the overall torque device 217; there are four tracking wires 218, arranged in pairs on the other two sides of the overall torque device 217, wherein the focusing wire 100 is perpendicular to the tracking wires 218; there are two magnets 215, respectively arranged at both ends of the focusing coil 212, and positioned at the focusing... Between the focal coil 212 and the tracking coil 216; there are two yokes 214, which are respectively fitted onto the focusing coil 212, magnet 215 and tracking coil 216 at both ends of the torque device, that is, the focusing coil 212, magnet 215 and tracking coil 216 at both ends are respectively set in the corresponding yokes 214; the objective lens 211 is adjusted by the focusing coil 212 and the focusing suspension wire 100, and the mirror 219 is adjusted by the tracking coil 216 and the tracking suspension wire 218.

[0060] Among them, such as Figure 2 As shown, the focusing wire 100 adopts the focusing wire in the above embodiment. By setting the first segment 110, the second segment 120, and the third segment 130 of the focusing wire on the same straight line, and symmetrically setting the first bending portion 140 and the second bending portion 150 at both ends of the second segment 120, the included angle formed by connecting the first bending portion 140 with the first segment 110 and the second segment 120 is set to be greater than 90 degrees, and the included angle formed by connecting the second bending portion 150 with the second segment 120 and the third segment 130 is set to be greater than 90 degrees. The first bending portion 140 and the second bending portion 150 are each composed of three bending segments, forming a four-triangular symmetrically distributed wire, which can effectively improve the stiffness of the second segment 120 in the tracking direction without changing the stiffness in the focusing direction, thereby realizing the function of synchronous movement of the objective lens 211 and the mirror 219 in the tracking direction.

[0061] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A focusing suspension wire, said focusing suspension wire being used as a torque converter in a holographic storage system, characterized in that, include: The first, second, and third line segments are set on the same straight line; and The first bend is disposed between the first line segment and the second line segment; The second bend is disposed between the second line segment and the third line segment; The first and second bending portions are symmetrically arranged. Both the first and second bending portions are composed of three bending line segments. The angle between the first bending portion and the connection points of the first and second line segments is greater than 90 degrees, and the angle between the second bending portion and the connection points of the second and third line segments is greater than 90 degrees.

2. The focusing suspension wire according to claim 1, characterized in that, The first bending portion includes a first bending segment, a second bending segment, and a third bending segment connected in sequence. The first bending segment is connected to the second segment, and the third bending segment is connected to the first segment. The angle between the first bending segment and the second bending segment is greater than 90 degrees, and the angle between the second bending segment and the third bending segment is greater than 90 degrees. The second bending portion includes a fourth bending segment, a fifth bending segment, and a sixth bending segment connected in sequence. The fourth bending segment is connected to the second segment, and the sixth bending segment is connected to the third segment. The angle between the fourth bending segment and the fifth bending segment is greater than 90 degrees, and the angle between the fifth bending segment and the sixth bending segment is greater than 90 degrees.

3. The focusing suspension wire according to claim 2, characterized in that, The included angles between the first and second bent segments, the second and third bent segments, the fourth and fifth bent segments, and the fifth and sixth bent segments are all rounded.

4. The focusing suspension wire according to claim 2, characterized in that, The first bend segment and the third bend segment have the same length, and the fourth bend segment and the sixth bend segment have the same length.

5. The focusing suspension wire according to claim 1, characterized in that, The cross-sections of the first line segment, the second line segment, the third line segment, the first bend, and the second bend are all rectangular.

6. The focusing suspension wire according to claim 5, characterized in that, The aspect ratio of the rectangle is 2:

1.

7. The focusing suspension wire according to claim 1, characterized in that, The length of the second line segment is shorter than the lengths of the first and third line segments.

8. A torque generator in a holographic storage system, the torque generator comprising a focusing suspension wire, characterized in that, The focusing suspension wire is the focusing suspension wire according to any one of claims 1-7.

Images