Manufacturing device and manufacturing method of square micro-cylindrical lens

Abstract

The invention discloses a square micro-cylindrical lens manufacturing device and method, and the device comprises a loading platform which is provided with a rotation axis and an elastic installation groove used for fixing a prism module, enables the prism module installed in the elastic installation groove to extend out, and rotates around the rotation axis under the drive of a power source; the grinding mechanism comprises a grinding cylinder and a driving part connected with the grinding cylinder, the grinding cylinder coaxially sleeves the peripheral side of the loading table, the grinding cylinder is provided with a grinding surface used for being matched with the prism module for grinding, and the driving part drives the grinding cylinder to linearly move along the rotating axis of the loading table. And the process problem that a prism blank with the curvature being R110mm or even larger than R110mm cannot be machined through an existing process is ingeniously simplified, the outturn percentage is increased, and the cost of a single prism is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of square micro-columns, and in particular to a manufacturing device and a manufacturing method of square micro-columns. Background Art

[0002] Micro-cylindrical lenses are similar to spherical lenses, both of which use curved surfaces to focus or diverge light, but cylindrical lenses only have the ability to converge or diverge in one direction and do not affect the light in the vertical direction. This is impossible to achieve using a spherical lens, because a spherical lens focuses or evenly diverges light in a rotationally symmetrical manner. When a parallel light beam is incident on a cylindrical lens, the light will be focused into a straight line by the cylindrical lens, which can effectively reduce spherical aberration and chromatic aberration. It is widely used in high-precision testers, high-power lasers, and optical communications.

[0003] like Figure 1 , the curved surface a of the cylindrical lens blank is usually processed into a cylindrical blank by a cylindrical rolling machine. 1 / 2 of the outer diameter is the curvature of the cylindrical lens. Then the cylinder is cut to form a plane b to obtain the cylindrical lens blank. The plane b is bonded to the polishing base and fixed. The curved surface a is polished by a classical cylindrical rolling machine or a CNC milling and polishing machine to finally obtain the surface finish and surface shape of the cylindrical lens. The cylindrical surface has directionality. The first direction is called the "functional direction", such as Figure 1 Optical path 1 is the only axis with optical function; the second direction is called "non-functional direction", such as Figure 1 Optical path 2 does not have any optical function, and the directions of optical path 1 and optical path 2 are perpendicular to each other.

[0004] With the upgrading of the industrial chain, optical devices tend to be small in size and compact in structure, which provides a large market for micro-column lenses. In the field of optical communications, the technology of directly mounting optical device components on the base platform is gradually adopted, and fixed parts such as metal sleeves are eliminated to optimize the functional area. In order to adapt to the trend of science and technology, a micro-column lens is developed, such as Figure 2 The curvature R and height H of the micro-cylindrical lens determine the focal length of the micro-cylindrical lens (refer to the focal length formula of the spherical lens); the four faces of the cylinder are square in structure, and there is no need to select the two non-c-notch cylinder faces, and any face can be directly mounted on the base platform (the c-notch is used to distinguish the optical functional direction and non-functional direction of the cylinder, and the notch depth <0.05mm does not interfere with the optical path). The cylinder size L = the design spacing from the center point of the optical path to the base * 2. In order to ensure that the optical path does not deviate, the central axis of the optical path needs to coincide with the center line of the square of the cylinder, and the two sides of the cylinder are symmetrical with the central axis of the square of the cylinder, which is used in the Optical Circulator Module.

[0005] Using existing technology, square micro-cylindrical lenses can be processed, such as Figure 3The first step is to thin the cylindrical blank to a length of L and take a cylindrical lens blank from the center line core, whose length is also L, while ensuring that the two sides of the cylinder are symmetrical with the center axis of the cylinder (there is a deviation in the center line during actual processing, which requires detection and selection). The second step is as follows Figure 4 The micro-cylindrical lens blank is cut from the inside to form a plane b, which is bonded to a polishing base and fixed, and then the curved surface a is polished by a cylindrical rolling polishing machine to obtain the smoothness and surface shape; in the third step, two symmetrical cylindrical surfaces in the cylindrical lens are grooved to distinguish the "functional direction", and in the fourth step, the plane b is ground and polished to control the height H; in the fifth step, it is cleaned with a conventional cleaning fixture.

[0006] Disadvantages of this technology: 1. Due to the processing limit of the cylindrical rolling machine, it is impossible to process cylindrical blanks with diameter > 220 mm, resulting in the curvature of the cylindrical lens processed by this technology being R < 110; 2. The yield rate is low and the loss is high, resulting in a high cost per piece, such as Figure 3 The remaining material of the core-extracted cylindrical mirror, such as the shadow area, has high processing cost for secondary use and is generally scrapped.

[0007] Therefore, a square micro-cylindrical lens manufacturing device and manufacturing method are still needed to solve the above problems. Summary of the invention

[0008] The present invention provides a square micro-column manufacturing device and a manufacturing method for solving the above-mentioned problem.

[0009] The purpose of the present invention is achieved by the following technical solutions:

[0010] A square micro-column manufacturing device comprises:

[0011] A loading platform, the loading platform having a rotation axis and an elastic mounting groove for fixing the prism module, so that the prism module installed in the elastic mounting groove extends out and rotates around the rotation axis under the drive of a power source;

[0012] The grinding mechanism includes a grinding cylinder and a driving member connected to the grinding cylinder. The grinding cylinder is coaxially sleeved on the peripheral side of the loading platform. The grinding cylinder has a grinding surface for cooperating with the prism module for grinding. The driving member drives the grinding cylinder to move linearly along the rotation axis of the loading platform.

[0013] In one embodiment, the driving member includes a motor, a rotating disk and a connecting rod, wherein the rotating shaft of the motor is rotatably connected to the axis of the rotating disk, one end of the connecting rod is rotatably connected to an eccentric position of the rotating disk, and the other end is rotatably connected to the outer wall of the grinding cylinder, so as to drive the grinding cylinder to reciprocate relative to the loading platform in the direction of the rotation axis of the loading platform.

[0014] In one embodiment, the prism module includes a carrier, a gasket and a prism material, the gaskets are respectively bonded to two sides of the prism material and are symmetrically distributed, and the carrier has a connecting portion for fixing the prism material by fixing the gasket.

[0015] In one embodiment, a limiting portion is formed on the inner side of the elastic mounting groove near the outer periphery of the loading platform, which is used to block the edge of the carrier to fix the prism module and allow the gasket and prism material to extend from between the limiting portions. The width of the elastic mounting groove is equal to the width of the outer wall of the carrier.

[0016] In one embodiment, an elastic component is further included, and the elastic component includes an elastic baffle. The elastic baffle is connected to the inner side of the elastic mounting groove near the rotation axis, and the elastic baffle is used to elastically abut the side wall of the carrier. During processing, the prism material is gradually advanced and moved, and finally advanced to a preset position so that the prism material is polished into a preset curvature that is the same as the inner diameter of the grinding cylinder.

[0017] In one embodiment, the elastic component also includes a limit plate, an elastic member and a guide member. A lubrication hole is also provided on the loading platform. The lubrication hole is connected to the elastic mounting groove through a connecting hole. The lubrication hole is located on the loading platform and extends along the direction of the rotation axis. The limit plate is located in the lubrication hole and is threadedly connected to one end of the guide member. The other end of the guide member is connected to an elastic baffle located in the elastic mounting groove. The elastic member is sleeved on the peripheral side of the guide member and elastically abuts against the elastic baffle and the inner wall of the elastic mounting groove. When the elastic member pushes the prism raw material to a preset position, the elastic member is in a state of maximum elastic extension.

[0018] In one embodiment, a connecting hole is opened at the axis of the loading platform, and the connecting hole is connected to the outer walls of two adjacent elastic mounting grooves through a through hole.

[0019] A method for manufacturing a square micro-cylindrical lens, using any one of the square micro-cylindrical lens manufacturing devices described above, comprising the following steps:

[0020] The prism module is installed in the elastic installation groove and is ground into a prism by a grinding cylinder;

[0021] Fixing the prism in a polishing device for curved surface polishing;

[0022] polishing the polished prism plane;

[0023] The prism is cleaned and then coated. In one embodiment,.

[0024] In one embodiment, the step of installing the prism module in the elastic mounting groove and grinding it into a prism by a grinding cylinder comprises:

[0025] First, the grinding cylinder and the prism are moved back and forth relative to each other on the rotating axis of the grinding cylinder for 2 minutes;

[0026] Then, the grinding cylinder is gradually rotated along the rotation axis relative to the prism module to 150 rpm.

[0027] In one embodiment, the method further includes the following steps between the step of polishing the prism surface after polishing and the step of cleaning and coating the prism:

[0028] Grooving the side walls of both sides of the prism in sequence to form light path direction marks;

[0029] The prism is divided into a plurality of square micro-cylindrical lenses in equal parts.

[0030] Compared with the prior art, the beneficial effects of the present invention include at least:

[0031] The prism module is rotated by the loading platform so that it rotates relative to the inner wall of the grinding cylinder. After rotation and grinding, a prism module with the same curvature as the inner wall of the grinding cylinder is finally formed. This cleverly simplifies the process difficulty that the current process cannot process prism blanks with a curvature of R110mm or even greater than R110mm, improves the yield rate, reduces the cost per piece, and solves the problem of the deviation between the central axis of the square micro-cylindrical lens optical path and the center line of the cylinder square. It is convenient for batch processing of square micro-lens blanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Background technology Figure 1 ;

[0033] Figure 2 Background technology Figure 2 ;

[0034] Figure 3 Background technology Figure 3 ;

[0035] Figure 4 Schematic diagram of the loading platform mechanism of the embodiment of the present invention Figure 1 ;

[0036] Figure 5 Schematic diagram of the loading platform mechanism of the embodiment of the present invention Figure 2 ;

[0037] Figure 6 The structure of the manufacturing device of the embodiment of the present invention without the external rack is shown in FIG. Figure 1 ;

[0038] Figure 7 The structure of the manufacturing device of the embodiment of the present invention without the external rack is shown in FIG. Figure 2 ;

[0039] Figure 8 is an internal assembly diagram of a grinding cylinder and a loading platform according to an embodiment of the present invention;

[0040] Fig. 9 is a schematic diagram of the elastic baffle structure of an embodiment of the present invention;

[0041] Fig.10 is a schematic diagram of the guide structure of an embodiment of the present invention;

[0042] Fig.11 is a schematic diagram of the structure of a limiting plate according to an embodiment of the present invention;

[0043] Fig.12 is a flow chart of a manufacturing method according to an embodiment of the present invention;

[0044] Fig.13 is a schematic diagram of the prism module structure of an embodiment of the present invention;

[0045] Fig.14 Schematic diagram of the assembly state of the prism raw material and the gasket according to an embodiment of the present invention;

[0046] Fig.15 is a schematic diagram of the structure after the prism raw material and the gasket are separated according to an embodiment of the present invention;

[0047] Fig.16 is a schematic diagram of the structure of the prism material after being cut into pieces according to an embodiment of the present invention;

[0048] Fig.17 is a schematic diagram of the structure of the prism material after being grooved according to an embodiment of the present invention;

[0049] Fig.18 It is a schematic diagram of the prism structure manufactured according to an embodiment of the present invention.

[0050] In the figure: 1. loading platform; 11. elastic mounting groove; 12. limiting part; 13. lubrication hole; 2. grinding mechanism; 21. grinding cylinder; 22. driving member; 221. motor; 222. rotating disk; 223. connecting rod; 23. grinding surface; 3. prism module; 31. carrier; 32. gasket; 33. prism raw material; 4. elastic component; 41. elastic baffle; 42. elastic member; 43. guide member; 44. limiting plate; 5. connecting hole; 51. through hole; 6. power source; 7. lubrication tube. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0052] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0053] Reference Figure 4-11 The present invention provides a device for manufacturing a square micro-cylindrical lens, comprising:

[0054] The loading platform 1 has a rotation axis and an elastic mounting groove 11 for fixing the prism module 3, so that the prism module 3 installed in the elastic mounting groove 11 extends out and rotates around the rotation axis under the drive of the power source 6. The loading platform 1 is a rotating body and can rotate along the rotation axis. The power source 6 can be a transmission device connected to the outside, and the circumference of the loading platform 1 can include a plurality of elastic mounting grooves 11 distributed in a circumferential array. When rotating, the elastic mounting grooves 11 always elastically abut one side of the prism module 3, so that the prism module 3 can always be evenly polished with external accessories, and finally accurately form a preset curvature surface.

[0055] The grinding mechanism 2 includes a grinding cylinder 21 and a driving member 22 connected to the grinding cylinder 21. The grinding cylinder 21 is coaxially sleeved on the peripheral side of the loading platform 1. The grinding cylinder 21 has a grinding surface 23 for cooperating with the prism module 3 for grinding. The driving member 22 drives the grinding cylinder 21 to move linearly along the rotation axis of the loading platform 1. The inner wall of the grinding cylinder 21 is formed with an annular grinding surface 23. The driving member 22 drives the grinding surface 23 to reciprocate relative to the prism module 3 in the axial direction, so that the edge of the prism module 3 is initially ground to avoid excessive interference margin of the prism, which causes the prism to be broken due to direct rotation grinding, and the prism in the prism module 3 is directly broken and scrapped.

[0056] This processing method can reduce the cost of each prism, simplify the current processing technology, improve the yield rate, and facilitate more precise control of the optical path center axis of the lens blank.

[0057] Preferably, the driving member 22 includes a motor 221, a rotating disk 222 and a connecting rod 223, the rotating shaft of the motor 221 is rotatably connected to the axis of the rotating disk 222, one end of the connecting rod 223 is rotatably connected to the eccentric position of the rotating disk 222, and the other end is rotatably connected to the outer wall of the grinding cylinder 21, for driving the grinding cylinder 21 to reciprocate relative to the loading platform 1 in the direction of the rotation axis of the loading platform 1. The housing of the motor 221 is fixed on the frame, and the rotating shaft of the motor 221 is fixedly connected to the center of the rotating disk 222, and the connecting rod 223 is driven by the rotating disk. When working, the other end of the connecting rod 223 connected to the rotating disk is rotatably connected to the outer wall of the grinding cylinder 21. Through the cooperation of the grinding cylinder 21 and the loading platform 1, the grinding cylinder 21 reciprocates relative to the loading platform 1, so that the side wall of the prism module 3 and the inner wall of the grinding cylinder 21 are rubbed against each other during the linear movement of the mutual movement, and the corners are initially polished to avoid excessive friction in subsequent rotation polishing, which may cause the prism module 3 and the prism in the prism module 3 to break. Improve the yield rate of products and reduce the scrap rate.

[0058] Preferably, the prism module 3 includes a carrier 31, a gasket 32 ​​and a prism raw material 33, wherein the gaskets 32 are respectively bonded to both sides of the prism raw material 33 and are symmetrically distributed, and the carrier 31 has a connecting portion for fixing the prism raw material 33 by fixing the gasket 32. The cross-sectional shape of the carrier 31 is symmetrically arranged, and the gaskets 32 are respectively symmetrically distributed on both sides of the prism raw material 33. The gaskets 32 are respectively connected by a wax sealing process, and the overall prism module 3 after connection is symmetrically arranged. The symmetry line of the prism fixed in the elastic mounting groove 11 coincides with the path of the preset optical path, so that when the loading platform 1 rotates, the prism optical path finally formed by the rotation and grinding of the internal grinding cylinder 21 can be accurately located at the preset position of the symmetry center of the prism module 3. It is convenient to control the optical path of the prism, and break the technical difficulty that the existing process cannot process lenses with larger curvatures. By cooperating with this prism module 3 and the present manufacturing device, the prism can be improved.

[0059] The height of the gasket 32 ​​is higher than the height of the prism material 33. Preferably, the height of the gasket 32 ​​is 2 mm higher than the prism material 33, which can fully play a protective role during rotation.

[0060] The rotation radius of the loading platform 1 is, for example, 48 mm, the inner diameter of the grinding cylinder 21 is 50 mm, and the interior of the grinding cylinder 21 is a diamond grinding layer. Finally, the preset optical path of the prism raw material 33 after grinding coincides with the symmetry center of the prism square, and the curvature of the prism is 50 mm.

[0061] Preferably, a limiting portion 12 is formed on the inner side of the elastic mounting groove 11 near the outer periphery of the loading platform 1, which is used to block the edge of the carrier 31 to fix the prism module 3, and to make the pad 32 and the prism raw material 33 extend from between the limiting portions 12, and the width of the elastic mounting groove 11 is equal to the width of the outer wall of the carrier 31. The limiting portion 12 is used to block the edge of the carrier 31 of the prism module 3 to fix the entire prism module 3, so as to prevent the prism module 3 from being relatively offset in the circumferential direction after rotation, resulting in the final processing prism light path being offset, and causing the product to be scrapped.

[0062] Preferably, it also includes an elastic component 4, the elastic component 4 includes an elastic baffle 41, the inner side of the elastic mounting groove 11 is connected to the elastic baffle 41 near the rotation axis, the elastic baffle 41 is used to elastically abut the side wall of the carrier 31, during processing, the prism raw material 33 is gradually pushed forward and moved, and finally pushed to a preset position so that the prism raw material 33 is polished into a preset curvature with the same curvature as the inner diameter of the grinding cylinder 21. The elastic mounting groove 11 can effectively push the prism module 3 stably to ensure that the rotation is uniformly polished, and the pads 32 arranged on both sides of the prism can prevent the prism from directly causing eccentric wear, or uneven grinding leads to excessive grinding at a certain moment and corner collapse, resulting in scrapping.

[0063] Preferably, the elastic component 4 also includes a limit plate 44, an elastic member 42 and a guide member 43. A lubrication hole 13 is also provided on the loading platform 1. The lubrication hole 13 is connected to the elastic mounting groove 11 through a connecting hole 5. The lubrication hole 13 is located on the loading platform 1 and extends along the direction of the rotation axis. The limit plate 44 is located in the lubrication hole 13 and is threadedly connected to one end of the guide member 43. The other end of the guide member 43 is connected to an elastic baffle 41 located in the elastic mounting groove 11. The elastic member 42 is sleeved on the peripheral side of the guide member 43 and elastically abuts against the elastic baffle 41 and the inner wall of the elastic mounting groove 11. When the elastic member 42 pushes the prism raw material 33 to a preset position, the elastic member 42 is in a state of maximum elastic extension. The movable distance of the limit plate 44 in the lubrication hole 13 limits the elastic propulsion length of the elastic baffle 41, which can avoid excessive grinding of the preset prism while controlling the height and curvature of the prism. In addition, the lubrication hole 13 can also be used as a lubricant addition port. On the one hand, it plays a role in size limitation. On the other hand, it can store and provide lubricant during grinding, thereby improving the grinding efficiency of the prism and avoiding large pits on the surface of the prism being damaged during grinding, which would lead to scrapping.

[0064] Preferably, a connecting hole 5 is provided at the axis of the loading platform 1, and the connecting hole 5 is connected to the outer walls of two adjacent elastic mounting grooves 11 through a through hole 51. The connecting hole 5 can also provide a storage space for lubricant, and when rotating, it flows to the inner wall of the grinding cylinder 21 through the through hole 51, and can provide lubricant for the curved surface grinding of the prism. During grinding, the lubricating liquid in the lubrication hole 13 flows through the bottom of the elastic baffle 41 and then flows to the top of the elastic baffle 41, and finally flows to the top of the gasket 32 ​​and the prism raw material 33, and the lubricant that flows directly through the through hole 51 is sprayed from two ways to the inner wall of the grinding cylinder 21 and the top of the prism module 3, respectively, which can fully lubricate the prism module 3 during grinding. Improve the grinding efficiency and grinding quality of the prism.

[0065] External lubricant can also be pumped into the connecting hole 5 through the lubrication pipe 7 to provide a continuous supply of lubricant to provide protection for the entire grinding process.

[0066] Reference Fig.12 As shown, the present invention also discloses a method for manufacturing a square micro-column, using the square micro-column manufacturing device as described in any one of the above, comprising the following steps:

[0067] The prism module 3 is installed in the elastic installation groove 11 and is ground into a prism by the grinding cylinder 21. The prism module 3 is gradually inserted along the extension direction in the elastic installation groove 11, and then the grinding cylinder 21 is driven to grind relative to the prism to form a prism.

[0068] The prism is fixed in a polishing device for curved surface polishing.

[0069] The prism plane is polished. The bottom of the prism is fixed in a polishing device by an adhesive or a clamp, and the curved surface and the other light-transmitting surface opposite to the curved surface are polished without changing the size.

[0070] The prism is cleaned and coated. According to the specific needs of the product, the curved surface in the device, or the other side opposite to the curved surface, can be coated to meet the specified light transmission requirements.

[0071] Preferably, the step of installing the prism module 3 in the elastic installation groove 11 and grinding it into a prism by means of a grinding cylinder 21 comprises:

[0072] First, the grinding cylinder 21 and the prism are moved back and forth relative to each other on the rotation axis of the grinding cylinder 21 for 2 minutes. The grinding cylinder 21 is controlled to move back and forth along the edge of the prism module 3 relative to the prism module 3 in the direction of the rotation axis to grind the edge of the prism to remove excess residues through preliminary grinding, so as to avoid the sharp edge from breaking during the rotation and grinding of the curved surface, thereby directly damaging the prism and improving the qualified rate of the product.

[0073] Then the grinding cylinder 21 is gradually rotated along the rotation axis relative to the prism module 3 to 150 rpm. The speed of rotation grinding is gradually increased to avoid the edge temperature of the prism rising rapidly during grinding, which may cause excessive stress concentration and collapse, thereby reducing the scrap rate.

[0074] Preferably, the manufacturing method further comprises the following steps between the step of polishing the prism plane after polishing and the step of cleaning and coating the prism:

[0075] The side walls of the prism are grooved in sequence to form a light path direction mark. A groove is made on the non-light path surface of the prism by a groove cutting machine as a mark to avoid the problem that subsequent operators cannot intuitively judge during installation.

[0076] The prism is equally divided into a plurality of square micro-cylindrical lenses. A cutting machine is used to divide the prism strip into a plurality of prisms of equal height and consistent curvature.

[0077] Through this method, the polishing yield can be effectively improved, and the calibration of the central axis of the square micro-column optical path and the center line of the column square can be conveniently controlled to improve the qualified rate of the square micro-column.

[0078] Embodiments of the process of the present invention are adopted:

[0079] Reference Figure 13-18 :

[0080] 1) Customized prism raw material 33-1 (size: length 50*width 1*height 10mm) material: N-BK7, gasket 321, gasket 322 (size: length 50*width 1.5*height 12mm) material: float glass, loaded into carrier 31-2133, forming prism module 33 as shown Fig.13 .

[0081] The heights of the gaskets 321 and 322 are consistent and higher than the prism material 33 - 1 , and the height is controlled at 2 mm. The purpose is to allow the two gaskets 32 to play a protective role and prevent the prism from chipping during the initial grinding, which would cause defects.

[0082] 2) Install the prism module 3-213 into the elastic mounting groove 11. Using the special structure of the elastic mounting groove 11, five groups of prism materials 33 can be installed, such as Fig.13 shown.

[0083] Finally, a cylindrical mirror grinding and rotating mechanism is formed, and the radius r of the main axis of the circle formed by the outermost periphery of the fixture frame area is 48 mm. The height of the two gaskets 32 exceeds the r dimension by 7 mm, and the prism raw material 33 exceeds the r dimension by 5 mm.

[0084] 3) The grinding cylinder 2121 is assembled by sleeve-wrapping the loading platform 11, and a round hoop is sleeved on the round groove and locked.

[0085] 4) When starting the process, open the grinding liquid pipe-23 to spray the grinding liquid and start the swing power. First, let the grinding cylinder 21 reciprocate along the axis relative to the loading platform 1, so that the prism module 3 grinds the edge up and down at a right angle. After 2 minutes, turn on the rotation power and gradually increase the speed to 150rpm;

[0086] 5) The inner surface of the semicircular grinding cylinder 2121 is plated with a diamond grinding layer, and its curvature is 50 mm. After the grinding is completed, the spring extension of 5 mm is fully released, so that the prism module 3 is obtained. Fig.14 After grinding, the final size exceeds r by 2mm, and the curvature obtained is R=48+2=50mm.

[0087] 6) After the square cylindrical lens blank is processed, it is slightly heated, the carrier 31 is taken out, and the prism raw material 33, the pad 32, and the pad 32 are taken out as a whole to form a polishing module as shown in FIG. Fig.14 , use the existing cylindrical rolling polishing machine to polish the entire curved surface to obtain smoothness and surface shape.

[0088] 7) After the polishing of the cylindrical mirror is completed, the pads 321 and 322 are removed, leaving the long cylindrical mirror (such as Fig.15 ), size: length 50*width 1*height 7mm.

[0089] 8) The opposite side of the processed cylindrical surface R is plane processed and polished to a final height of 1mm (such as Fig.16 ), size: length 50*width 1*height 1mm.

[0090] 9) In order to distinguish the directionality of the cylindrical lens, grooves are made at the center of both sides of the cylindrical body (symmetrically on both sides), with a depth of <0.05mm and a width of <0.1mm (such as Fig.17 ), the direction of the slot is perpendicular to the direction of the light path.

[0091] 10) Perform wire cutting on the slotted long cylindrical mirror, divide the 50mm long cylindrical mirror into 40 square micro-cylindrical mirrors, and put them into the square cylindrical mirror cleaning tool for cleaning (such as Fig.18 ), small particle size: R50*L1*L1*H1mm.

[0092] Experimental verification has shown that the prism processing method disclosed in the present invention is highly efficient and can ensure the processing quality of the optical path and the center line of the rectangular prism are highly consistent. While simplifying the processing technology, it significantly reduces the processing cost and breaks the process difficulty of the existing process for processing prism blanks with a curvature of R110mm.

[0093] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A device for manufacturing square micro-cylindrical lenses, characterized in that: include: A loading platform, the loading platform having a rotation axis and an elastic mounting groove for fixing the prism module, so that the prism module installed in the elastic mounting groove extends out and rotates around the rotation axis under the drive of a power source; The grinding mechanism includes a grinding cylinder and a driving member connected to the grinding cylinder. The grinding cylinder is coaxially sleeved on the peripheral side of the loading platform. The grinding cylinder has a grinding surface for cooperating with the prism module for grinding. The driving member drives the grinding cylinder to move linearly along the rotation axis of the loading platform.

2. The manufacturing device according to claim 1, characterized in that: The driving member includes a motor, a rotating disk and a connecting rod. The rotating shaft of the motor is rotatably connected to the axis of the rotating disk. One end of the connecting rod is rotatably connected to the eccentric position of the rotating disk, and the other end is rotatably connected to the outer wall of the grinding cylinder, so as to drive the grinding cylinder to reciprocate relative to the loading platform in the direction of the rotation axis of the loading platform.

3. The manufacturing device according to claim 1, characterized in that: The prism module includes a carrier, a gasket and a prism material. The gaskets are respectively bonded to two sides of the prism material and are symmetrically distributed. The carrier has a connecting portion for fixing the prism material by fixing the gasket.

4. The manufacturing device according to claim 3, characterized in that: A limiting portion is also formed on the inner side of the elastic mounting groove near the outer periphery of the loading platform, which is used to block the edge of the carrier to fix the prism module and allow the gasket and prism material to extend from between the limiting portions. The width of the elastic mounting groove is equal to the width of the outer wall of the carrier.

5. The manufacturing device according to claim 1 or 4, characterized in that: It also includes an elastic component, which includes an elastic baffle. The elastic baffle is connected to the inner side of the elastic mounting groove near the rotation axis. The elastic baffle is used to elastically abut the side wall of the carrier. During processing, the prism material is gradually advanced and moved, and finally advanced to a preset position so that the prism material is polished into a preset curvature that is the same as the inner diameter of the grinding cylinder.

6. The manufacturing device according to claim 5, characterized in that: The elastic component also includes a limit plate, an elastic member and a guide member. A lubrication hole is also provided on the loading platform. The lubrication hole is connected to the elastic mounting groove through a connecting hole. The lubrication hole is located on the loading platform and extends along the rotation axis. The limit plate is located in the lubrication hole and is threadedly connected to one end of the guide member. The other end of the guide member is connected to an elastic baffle located in the elastic mounting groove. The elastic member is sleeved on the peripheral side of the guide member and elastically abuts against the elastic baffle and the inner wall of the elastic mounting groove. When the elastic member pushes the prism raw material to a preset position, the elastic member is in a state of maximum elastic extension.

7. The manufacturing device according to claim 6, characterized in that: A connecting hole is provided at the axis of the loading platform, and the connecting hole is connected to the outer walls of two adjacent elastic mounting grooves through a through hole.

8. A method for manufacturing a square micro-cylindrical lens, characterized in that: The square micro-column manufacturing device according to any one of claims 1 to 7 comprises the following steps: The prism module is installed in the elastic installation groove and is ground into a prism by a grinding cylinder; Fixing the prism in a polishing device for curved surface polishing; polishing the polished prism plane; The prism is cleaned and then coated.

9. The manufacturing method according to claim 8, characterized in that: The method of installing the prism module in the elastic mounting groove and grinding it into a prism by a grinding cylinder comprises: First, the grinding cylinder and the prism are moved back and forth relative to each other on the rotating axis of the grinding cylinder for 2 minutes; Then, the grinding cylinder is gradually rotated along the rotation axis relative to the prism module to 150 rpm.

10. The manufacturing method according to claim 8, characterized in that: The method further includes the following steps between the step of polishing the prism surface after polishing and the step of cleaning and coating the prism: Grooving the side walls of both sides of the prism in sequence to form light path direction marks; The prism is divided into a plurality of square micro-cylindrical lenses in equal parts.

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