TWM588626U - Molding device for lens array - Google Patents

Abstract

This invention is a mold equipment for lens array, which is used to press a plurality of lenses on a flat or curved plate structure. The plate structure includes a plate body with a thickness T and a plurality of through holes penetrating the plate body. It is characterized in that the mold equipment of the lens array includes an upper die and a lower die, the upper die includes a plurality of upper die extrusion areas and a plurality of upper die cavities, and the lower die includes a plurality of lower dies The extruding area and the plurality of lower mold cavities, the plate structure can be movably disposed between the upper stamp and the lower mold, and a plurality of lenses are respectively disposed in the plurality of through holes of the plate structure.

Description

Mold equipment for lens array

This creation relates to a mold equipment for a lens array or a micro lens array (Micro Lens Array), in particular to a mold equipment for manufacturing a lens array of a flat plate and a curved plate structure.

Due to the vigorous development of the optoelectronic industry, many dense optical components are becoming thinner and shorter, and the shape of the component is composed of flat, spherical, even aspherical, and non-axisymmetric free-form surfaces with more complex shapes, bringing shape 狀 precision, 輪廓精度 and rough surface度The requirements are becoming increasingly stringent. In the manufacturing and processing of these precision optical components, the processing accuracy of centimeter-level or even micrometer-level dimensions is generally involved; in this way, the surface shape of these optical components may reach the sub-micron level, and the surface roughness 度 or even reach奈Meter level. These precision optical components are small in size, light in quality, and require large use. They can achieve special functions such as micro, array, and wavefront conversion that are difficult to achieve with traditional optical components. For example, the key components in the imaging optical system, illumination optical system, optical communication, and optical signal 理-micro lens array 列 (MLA, Micro-Lens Array); used to detect the intensity, color, and direction of light, and Light-field camera that can capture the light field information formed by the scene; or wafer-level optics (Wafer Level Optics), wave-front detector (Wave-front Detector), optical fiber 連 connector (Optical Fiber Coupler) , The lens of Brightness Enhancement Module of Liquid Crystal Display (LCD), micro projector (Picoprojector) and CIS (Contact Image Sensor) module scanner will use these high-precision Optical components are used to output or couple optical parameters, so that electro-mechanical instruments or equipment can generate preset photoelectric functions. Taking the light field camera as an example, it records the intensity and color of the light at different positions and the direction of the light at different positions through the micro lens array 列 in the entire light field range, and then restores the image through image software calculation. Adjust the focus arbitrarily to produce new images. Or, the microlens array 列 is designed as a combination of microlenses with multiple focal points. In this way, you can get a 3D image and a 3D deep 度information with only one imaging. Compared with a general camera that can only record the intensity of light at different positions, the microlens array of this light field camera obviously has better and wider photoelectric application value. The above-mentioned optical innovation technologies need to form a "compound eye" type imaging vision and light collection system based on the curved configuration microlens array to achieve the above-mentioned special effects. Because of its advantages of wide field of view, high detection, high sensitivity, small size, and light weight, the microlens array with curved surface configuration has a wide application potential in civil and military applications. At present, the products that have been developed and applied include a variety of products in the military and civilian fields such as robot vision systems, missile detection systems, and UAV detection systems. Traditionally, the processing of planar microlens arrays must take into account the difficulty of processing the lens, the use of molds, and process conditions; generally, the processing standards of curved microlens arrays will be more stringent and more complicated, so Germany, Japan, Countries such as the United States, Canada, and the United Kingdom are betting on many R&D resources to develop and seek breakthroughs. Therefore, how to overcome the current technical bottleneck and use more convenient and more economical methods to manufacture lens arrays/microlens arrays in the shape of flat plates and curved plates with lenses of different sizes or different materials (Lens), This is the goal of those with ordinary knowledge in this field.

The main purpose of this creation is to process and manufacture lens arrays or microlens arrays in the shape of flat plates and curved plates. Another purpose of this creation is to make the production of lens arrays or microlens arrays in the shape of flat plates and curved plates, taking into account the manufacturing accuracy, structural feasibility, and cost economy. In order to solve the above and other problems, the present invention provides a lens array mold device for pressing a plurality of lenses on a plate structure including a plate body with a thickness T and a plurality of Through-hole, the lens includes a lens body part and a ring part surrounding the lens body part, the ring part has a thickness H, and is characterized in that the lens array mold equipment includes an upper stamper and a lower stamper, The upper die includes multiple upper die extrusion areas and multiple upper die cavities, the lower die includes multiple lower die extrusion areas and multiple lower die cavities, and the plate structure can be movably disposed on the Between the upper die and the lower die, a plurality of lenses are respectively disposed in the plurality of through holes of the plate structure, the thickness T1 of the plate body is greater than the thickness H of the ring portion, the plate structure The glass transition temperature (Tg) is lower than the glass transition temperature of the lens; wherein, the upper die and the lower die can move together in a first direction, so that the upper die extrusion area and the lower die are extruded The pressing area abuts and presses the plate body along the first direction. When the pressing area of the upper mold moves down to contact the plate body, the mirror body portion is separated from the upper mold cavity by a distance S1 along the first direction. The distance S1 is greater than the plastic deformation amount d of the upper die pressing area pressing the plate body. The mold apparatus of the lens array as described above, wherein the annular portion of the lens is separated from the side wall of the through hole by a distance S2. The mold apparatus of the lens array as described above, wherein the lower mold cavity supports contact with the lens body part or the ring part. The mold device of the lens array as described above, wherein at least one suction cavity is connected under the lower mold cavity. The mold apparatus of the lens array as described above, wherein the cross section of the upper mold cavity or the lower mold cavity is quadrangular. The mold apparatus of the lens array as described above, wherein the lens body portion of the lens is a convex structure, a concave structure or a Fresnel lens (Fresnel Lens) structure. The mold apparatus of the lens array as described above, wherein the shapes of the lens body portions of the plurality of lenses are different from each other, or the glass transition temperatures of the lens body portions of the plurality of lenses are different from each other. The mold apparatus of the lens array as described above, wherein the plurality of through holes of the plate structure are sequentially arranged, alternately arranged or regularly arranged. The mold apparatus of the lens array as described above, wherein the glass transition temperature of the plate structure is lower than the glass transition temperature of the lens, or the softening point temperature of the plate structure is lower than the softening point temperature of the lens. The mold apparatus of the lens array as described above, wherein when the upper mold pressing area moves down to contact the plate body, at least one outer side of the upper mold cavity is spaced a distance S3 from the lens in the lateral direction, and the distance S3 is greater than zero. In this way, the mold equipment of the lens array is manufactured with a large number of high-precision lenses manufactured in advance to be combined and pressed on a flat plate or a curved plate structure; due to the low glass transition temperature (low Tg value) The use of the board structure, so the mold equipment in the mold clamping process, the pressure in the mold will not be too large, so it can overcome the high mold pressure, difficult technical bottlenecks, in a more convenient and economical way, To manufacture a lens array or micro lens array. In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings related to this creation, but the drawings are only for reference and explanation, not to limit this creation. In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings of this creation, however, the drawings are only for reference and explanation, not to limit this creation.

Please refer to FIG. 1A, which is a schematic diagram of a lens. As shown in the figure, a lens 8 includes a mirror body portion 81 and an annular portion 82 that surrounds the periphery of the mirror body portion 81. The mirror body portion 81 of this embodiment is a convex structure. In other embodiments, the mirror body portion 81 of the lens 8 may also be a double concave structure, a convex one flat structure, a concave one flat structure, a convex A concave structure, or Fresnel Lens (Fresnel Lens) structure. The lens 8 can be mass-produced and molded in advance, and because the outline of the mirror body portion 81 is a simple geometric curved surface or a flat surface, pre-manufacturing can take into account both mass production and precision. Please refer to FIG. 1B to FIG. 1E. FIG. 1B to FIG. 1E are schematic diagrams of mold clamping processing of a mold device for creating a lens array. As shown in FIG. 1B, the mold device 1 of the present lens array is designed to press a plurality of lenses 8 on a curved plate structure 13, and the material of the plate structure 13 includes but is not limited to metals and alloys , Ceramics, glass, polymer composites, etc. The plate structure 13 includes a plate body 131 with a thickness T1 and a plurality of through holes 132 penetrating the plate body 131. The mold apparatus 1 includes an upper stamper 11 and a lower stamper 12. The upper die 11 includes a plurality of upper die extrusion zones 116 and a plurality of upper die cavities 115, the lower die 12 includes a plurality of lower die extrusion zones 126 and a plurality of lower die cavities 125, the plate structure 13 is movably disposed between the upper stamper 11 and the lower stamper 12. Here, firstly, a plurality of lenses 8 are placed on the plurality of lower mold cavities 125 of the lower die 12 respectively, so that each lens 8 corresponds to one lower mold cavity 125. Then, as shown in FIG. 1C, the plate structure 13 is moved downward so that the plurality of through holes 132 of the plate structure 13 correspond to the multiple lenses 8; in this way, the multiple lenses 8 can be separately The plurality of through holes 132 of the plate structure 13 are arranged so that each lens 8 is accommodated in a through hole 132. Next, as shown in FIG. 1D, the upper die 11 moves downward, and the upper die 11 and the lower die 12 are closed in a first direction A1. When the upper die 11 touches the plate structure 13 , The upper die pressing area 116 will abut the board body 131. At this time, each upper mold cavity 115 corresponds to a lens 8 and a lower mold cavity 125 along the first direction A1; the mirror body portion 81 is spaced from the upper mold cavity 115 along the first direction A1 by a distance S1, such as As shown in the enlarged view of FIG. 1D, the length of the pitch S1 at different positions is different. As shown in FIG. 1E and its enlarged view, the upper die 11 continues to move down along the first direction A1, when the upper die extrusion zone 116 and the lower die extrusion zone 126 abut along the first direction A1 Press and squeeze the plate body 131 of the plate structure 13 to plastically deform the plate body 131, thereby forming a deformation area B; the deformation area B of the plate body 131 flows due to the pressing force, thereby covering the The periphery of the annular portion 82 of the lens 8 allows the plate structure 13 to bond and fix a plurality of lenses 8. That is, the annular region 82 of the lens 8 is covered by the deformed region B, so that the plurality of lenses 8 are fixed and fixed on the plate structure 13 without loosening or falling off. As shown in FIGS. 1F and 1G, a plurality of lenses 8 are fixed on the plate structure 13, that is, a lens array 9 is formed. The lens array 9 of FIG. 1F is curved only on the y-axis (one-dimensional curved plate). The 1G lens array 9 is curved on the x-axis and y-axis (two-dimensional curved plate). In this embodiment, the outline of the lower mold cavity 125 is similar to the outline under the lens 8, therefore, the lens 8 can smoothly fit or lay flat on the lower mold cavity 125. In addition, the sizes or configurations of the multiple lenses 8 shown in the embodiments of FIGS. 1F and 1G are not the same. In other embodiments, the shapes of the lens body portions 81 of the multiple lenses 8 of the lens array 9 may be different from each other. The same, or the glass transition temperatures of the lens body portions 81 of the plurality of lenses 8 are different from each other. In other different embodiments, the plurality of through holes 132 of the board structure 13 may be arranged sequentially, alternately or regularly. Of course, the board body 131 of the board structure 13 may also be non-transparent (for example Processes such as surface coating, surface coating, surface blasting, surface atomization, surface attachment or internal doping of the board structure 13 are applied). In addition, the glass transition temperature (Tg) of the plate structure 13 is lower than the glass transition temperature of the lens 8; moreover, the softening point temperature of the plate structure 13 is also lower than the softening point temperature of the lens 8; As a result, when the plate structure 13 and the lens 8 are simultaneously subjected to the force of pressing and pressing against the mold clamping, the plate body 131 of the plate structure 13 will first plastically deform to generate the deformed area B. Next, the thickness of the plate body 131 before being pressed is T1 (as shown in the enlarged view of FIG. 1D); when the upper die pressing area 116 moves down along the first direction A1 to resist and squeeze After the plate body 131, the thickness of the plate body 131 after plastic deformation is T2 (as shown in the enlarged view of FIG. 1E). The difference between the thickness T1 and the thickness T2 is the plastic deformation amount d of the plate structure 13 in the first direction A1, that is, T1-T2=d. As shown in the enlarged view of FIG. 1D and the enlarged view of FIG. 1E, the annular portion 82 has a thickness H, and the original thickness T1 of the plate body 131 is greater than the thickness H of the annular portion 82, so the upper die 11 is pressed When the plate body 131 of the plate structure 13 is formed, the plate body 131 will reduce the value of the thickness T1 due to plastic deformation, and the amount of reduction (ie, the plastic deformation amount d) will be smaller than the spacing S1, that is, the spacing S1 is greater than the plastic deformation amount d of the plate body 131 (ie, S1 is greater than d). In this way, it can be ensured that the contour of the upper mold cavity 115 does not scratch, damage or squeeze the lens. In the embodiment shown in FIGS. 1B to 1D, the lenses 8 are placed in the lower mold cavities 125 of the lower die 12, and then the through holes 132 of the plate structure 13 are paired. After quasi-multiple lenses 8, the plate structure 13 is moved down, and then the mold is closed (the upper die 11 moves down). In other embodiments, the through holes 132 of the plate structure 13 can be aligned with the lower mold holes 125, and then the plate structure 13 can be attached to the lower die 12 before finally The plurality of lenses 8 are placed in the plurality of through holes 132 so that the lower end of the lens 8 fits the contour of the lower mold cavity 125. In addition, as shown in the enlarged view of FIG. 1D, the annular portion 82 of the lens 8 is separated from the side wall of the through hole 132 by an appropriate distance S2, so that the lens 8 is placed into the through hole of the plate structure 13 Within 132, it can avoid the situation of misalignment or structure jam. In addition, the contour of the lower mold cavity 125 and the contour of the lower end of the mirror body portion 81 or the ring portion 82 coincide with each other, so that the lower mold cavity 125 can more accurately support the mirror body portion 81 or the ring状部82。 82. Please refer to FIG. 2, which is a schematic diagram of lenses of different configurations used in a mold device for creating a lens array. In this embodiment, the sectional view of the annular portion 82 of the lens 8 is slightly curved; in this way, the contours of the lower end portions of the lens portion 81 and the annular portion 82 can be The stamper 12 and the lower die cavity 125 completely match. When the upper die 11 and the lower die 12 are closed, the huge in-mold pressure is less likely to damage or destroy the lens 8. 3 to 7 are schematic diagrams of mold equipment for other embodiments of creating a lens array. As shown in FIG. 3, the cross-sectional shape of the upper cavity 115 of the upper stamper 11 is rectangular or quadrangular. After the upper die 11 and the lower die 12 are closed, the distance S1 between the upper end of the lens 8 and the upper cavity 115 will be larger, so that the upper cavity 115 will not be scratched or squeezed. The outline of the lens 8. In particular, the mold apparatus 1 of this embodiment is suitable for the process of solar lens to focus incident sunlight; in addition to the application of solar lens, the creation can of course also be used in other imaging optical systems and illumination optical systems , Optical communication or optical signal office 理 system and many other different technical fields. As shown in FIG. 4, an air suction channel 123 is connected below each lower mold cavity 125, so that when the air suction channel 123 performs air suction, the lens 8 can be adsorbed through the pressure of the vacuum to make the lens 8 It is stably attached to the lower mold cavity 125 or used to guide the lens 8 into the through holes 132 of the plate structure 13. Wherein, the lower die 12 is provided with the suction channel 123, which can be arranged in sections (some are provided, other parts are not), or according to different lens 8 sizes, or according to different lens 8 contours and sizes According to requirements. Here, the purpose of providing the air suction channel 123 is to improve the degree of automation, so that a plurality of lenses 8 can enter the through hole 132 or the periphery of the lower mold cavity 125 automatically and quickly; the other of the air suction channel 123 is provided The purpose is to prevent the lens 8 from loosening and falling off from the lower mold cavity 125 due to the huge pressure in the mold during the clamping force. As shown in FIG. 5, the lower die 12 of this embodiment adopts the form of an air suction channel 123, and the upper die cavity 115 of the upper die 11 is arranged in an arc shape. As shown in FIG. 6, the lower mold cavity 125 of this embodiment has a rectangular or quadrangular cross-section. In this way, the lens 8 penetrates the ring portion 82 to make the lens body portion 81 erected on the lower mold cavity 125; The mirror body part 81 of the embodiment is in slight contact with the side wall of the lower mold cavity 125. As shown in FIG. 7, the rectangular or quadrangular lower mold cavity of this embodiment is larger, so the mirror body portion 81 is suspended through the lower mold cavity 125 through the annular portion 82. Please refer to FIG. 8A to FIG. 8B. FIG. 8A to FIG. 8B are schematic diagrams of the in-mold state of the creation mold equipment. As shown in FIGS. 8A and 8B, if the bending curvature of the lens array 9 is large, at the edge of the lens array 9, the upper die 11 and the lower die 12 of the mold device 1 are along the first direction A1 When the mold clamping is performed, the upper stamper 11 may scratch or squeeze the lens portion 81 or the ring portion 82 of the lens 8. Therefore, when the upper die squeeze area 116 moves down to contact the plate body 131, the rightmost part F of the upper die cavity 115 is separated from the lens 8 by a distance S3 in the lateral direction (ie, horizontal direction), and the The distance S3 is greater than zero to prevent the upper die 11 from scratching or crushing the lens 8 when the mold is moved along the first direction A1. That is, when the upper die squeeze zone 116 moves down to contact the plate body 131, the mirror body portion 81 is spaced from the upper die cavity 115 by a distance S1 along the first direction A1, and the upper die cavity 115 The rightmost part F is also spaced apart from the lens 8 in the horizontal direction by a distance S3; the purpose of the distance S1 and the distance S3 is to ensure that the upper stamper 11 does not scratch or damage the lens 8 when the mold is moved. In this way, the mold device 1 of the lens array 9 is manufactured by using a large number of lenses 8 with high precision manufactured in advance to be combined and pressed on a flat plate or a curved plate structure 13; since lower glass can be used The conversion temperature (low Tg value) of the material, so the mold equipment 1 during the clamping and pressing process, the pressure in the mold will not be too large, so it can overcome the high mold pressure and difficult technical bottlenecks to make it more convenient and more An economical method is to use lenses (lens) of different sizes, sizes, or materials to manufacture the lens array 9 or microlens array in the shape of a flat plate or a curved plate. Therefore, it has great commercial application potential. This creation is described above with examples, but it is not intended to limit the scope of patent rights claimed in this creation. The scope of patent protection depends on the scope of the attached patent application and its equivalent fields. Anyone with ordinary knowledge in this field who makes changes or retouching without departing from the spirit or scope of this patent belongs to the equivalent change or design completed under the spirit disclosed in this creation, and shall be included in the scope of the following patent application Inside.

1‧‧‧Mould equipment 11‧‧‧Upper die 115‧‧‧ Upper mold cavity 116‧‧‧ Upper die extrusion area 12‧‧‧Lower die 123‧‧‧ Airway 125‧‧‧Lower mold cavity 126‧‧‧Lower die extrusion area 13‧‧‧Plate structure 131‧‧‧Board main body 132‧‧‧Through hole 8‧‧‧Lens 81‧‧‧Mirror body part 82‧‧‧Annular part 9‧‧‧lens array A1‧‧‧First direction B‧‧‧deformation area F‧‧‧The rightmost part T1, T2, H‧‧‧thickness S1, S2, S3‧‧‧spacing

Figure 1A is a schematic diagram of a lens. 1B to 1E are schematic diagrams of mold clamping processing of a mold device for creating a lens array. Figures 1F~1G are schematic diagrams of the structure of the creation lens array after forming. FIG. 2 is a schematic diagram of lenses of different configurations used in a mold device for creating a lens array. 3 to 7 are schematic diagrams of mold equipment for other embodiments of creating a lens array. 8A-8B are schematic diagrams of the in-mold state of the creation mold equipment.

1‧‧‧Mould equipment

11‧‧‧Upper die

115‧‧‧ Upper mold cavity

116‧‧‧ Upper die extrusion area

12‧‧‧Lower die

125‧‧‧Lower mold cavity

126‧‧‧Lower die extrusion area

13‧‧‧Plate structure

131‧‧‧Board main body

132‧‧‧Through hole

8‧‧‧Lens

81‧‧‧Mirror body part

82‧‧‧Annular part

A1‧‧‧First direction

B‧‧‧deformation area

T2‧‧‧thickness

Claims (10)

A lens array mold device for pressing a plurality of lenses (8) on a plate structure (13), the plate structure (13) includes a plate body (131) having a thickness T and a plurality of plates penetrating the plate The through hole (132) of the main body (131), the lens (8) includes a mirror body part (81) and an annular part (82) surrounding the mirror body part (81), the annular part (82) has The thickness H is characterized by: The mold device (1) of the lens array (9) includes an upper die (11) and a lower die (12), the upper die (11) includes a plurality of upper die extrusion areas (116) and a plurality of The upper die cavity (115), the lower die (12) includes a plurality of lower die extrusion areas (126) and a plurality of lower die cavities (125), the plate structure (13) is movably disposed on the upper Between the stamper (11) and the lower stamper (12), a plurality of lenses (8) are respectively disposed in the plurality of through holes (132) of the plate structure (13), and the plate body (131) The thickness T1 is greater than the thickness H of the annular portion (82), and the glass transition temperature (Tg) of the plate structure (13) is less than the glass transition temperature of the lens (8); Wherein, the upper die (11) and the lower die (12) can move together in a first direction (A1), so that the upper die extrusion area (116) and the lower die extrusion area (126) are along The first direction (A1) abuts and squeezes the plate body (131). When the upper die pressing area (116) moves down to contact the plate body (131), the mirror body part (81) moves along the The first direction (A1) is separated from the upper die cavity (115) by a distance S1 that is greater than the plastic deformation amount d of the upper die pressing area (116) pressing the plate body (131). The mold apparatus for a lens array according to claim 1, wherein the annular portion (82) of the lens (8) is separated from the side wall of the through hole (132) by a distance S2. The mold apparatus for a lens array according to claim 1, wherein the lower mold cavity (125) supports and contacts the mirror body part (81) or the ring part (82). The mold apparatus for a lens array according to claim 1, wherein at least a suction channel (123) is connected below the lower mold cavity (125). The mold apparatus of the lens array according to claim 1, wherein the upper mold cavity (115) or the lower mold cavity (125) has a quadrangular cross section. The mold device for a lens array according to claim 1, wherein the lens part (81) of the lens (8) is a convex structure, a concave structure or a Fresnel lens (Fresnel Lens) structure. The mold apparatus for a lens array according to claim 1, wherein the shapes of the lens body parts (81) of the plurality of lenses (8) are different from each other, or the glass transition of the lens body parts (81) of the plurality of lenses (8) The temperatures are different from each other. The mold apparatus for a lens array according to claim 1, wherein the plurality of through holes (132) of the plate structure (13) are sequentially arranged, alternately arranged, or regularly arranged. The mold apparatus for a lens array according to claim 1, wherein the glass transition temperature of the plate structure (13) is lower than the glass transition temperature of the lens (8), or the softening point temperature of the plate structure (13) Below the softening point temperature of the lens (8). The mold apparatus for a lens array according to claim 1, wherein when the upper mold pressing area (116) moves down to contact the plate body (131), at least one outer side of the upper mold cavity (115) is in contact with the lens (8) There is a spacing S3 in the lateral direction, and the spacing S3 is greater than zero.

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