Lens assembly

Abstract

We provide lens assemblies. [Solution] The lens assembly comprises, in order from the object side to the image side, an optical element containing multiple pairs of nanostructures and a pixel detection element containing multiple pairs of pixel regions. Each pair of nanostructures comprises a first view nanostructure and a second view nanostructure. Each pair of pixel regions comprises a first view pixel region and a second view pixel region. The first view nanostructure guides light rays from the object to form an image of the object on the first view pixel region, and the second view nanostructure guides light rays from the object to form an image of the object on the second view pixel region.

Description

Technical Field

[0001] The present invention relates to a lens assembly.

Background Art

[0002] How to significantly reduce the volume and weight of an imaging lens while maintaining good optical performance is the ultimate goal pursued by optical designers. Currently, the lenses used in mobile phones and AR / VR head-mounted devices are always required to be miniaturized and lightweight. It is difficult for conventional lenses to meet this requirement.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Therefore, an object of the present invention is to provide a lens assembly that can significantly reduce the size and weight of the lens assembly while maintaining good optical performance.

Means for Solving the Problems

[0004] The present invention provides a lens assembly having an optical element and a pixel detection element in order from the object side to the image side. The optical element has a plurality of pairs of nanostructures. The pixel detection element has a plurality of pairs of pixel regions. Each pair of nanostructures has a first-view nanostructure and a second-view nanostructure. Each pair of pixel regions has a first-view pixel region and a second-view pixel region. The first-view nanostructure guides light rays from an object to form an image of the object on the first-view pixel region, and the second-view nanostructure guides light rays from the object to form an image of the object on the second-view pixel region.

[0005] The first-view nanostructure and the second-view nanostructure are adjacent to each other to form a pair of nanostructures. All pairs of nanostructures are arranged in order to form a plurality of pairs of nanostructures.

[0006] The first view pixel region and the second view pixel region are adjacent to each other, forming a pair of pixel regions. All of these paired pixel regions are arranged in sequence to form multiple pairs of pixel regions.

[0007] The first and second Vue nanostructures are arranged at regular intervals to form pairs of nanostructures. All pairs of nanostructures are arranged periodically to form multiple pairs of nanostructures.

[0008] The first and second view pixel regions are arranged at regular intervals, forming pairs of pixel regions. All pairs of pixel regions are arranged periodically, forming multiple pairs of pixel regions.

[0009] The patterns or structures of the first-view nanostructure and the second-view nanostructure are either the same or different. The sizes of the first-view nanostructure and the second-view nanostructure are either the same or different. Multiple pairs of nanostructures are placed on both the first and second surfaces, or multiple pairs of nanostructures are placed on either the first or second surface.

[0010] The optical element has a first surface facing the object and a second surface facing the image. The pixel detection element is a sensor having a detection surface facing the object, and multiple pairs of pixel regions are formed on the detection surface. Light rays from the object pass through the first view nanostructure and are then guided to the first view pixel region, and light rays from the object pass through the second view nanostructure and are then guided to the second view pixel region.

[0011] The first surface of the optical element is divided into a first incident region facing the object and a second incident region facing the object. The pixel detection element is divided into a first detection region facing the object and a second detection region facing the object. The first and second incident regions are divided horizontally into a total of "a" rows and vertically into a total of "b" columns, such that the sum of the incident regions is "a" × "b". "a" is a positive integer greater than or equal to 2, and "b" is a positive integer greater than or equal to 1, or "a" is a positive integer greater than or equal to 1, and "b" is a positive integer greater than or equal to 2, and each incident region has its own nanostructure. The first and second detection regions are divided horizontally into a total number of rows equal to the number of rows in the incident region and into a total number of columns equal to the number of columns in the incident region.

[0012] Light rays from an object enter the incident region of the mth row and nth column, and are then directed to the corresponding sensing region of the mth row and nth column. Here, "m" is a positive integer from 1 to a, and "n" is a positive integer from 1 to b.

[0013] A ray from an object enters the incident region at the mth row and (2n-1)th column, and is then guided to the sensing region at the mth row and nth column, where "m" is a positive integer from 1 to a and "n" is a positive integer from 1 to b / 2. A ray from an object enters the incident region at the mth row and 2nth column, and is then guided to the sensing region at the mth row and (b / 2+n)th column, where "m" is a positive integer from 1 to a and "n" is a positive integer from 1 to b / 2.

[0014] The number of columns in the incident region is equal to the number of columns in the sensing region, and the number of rows in the incident region is equal to the number of rows in the sensing region.

[0015] The patterns of multiple pairs of nanostructures are selected from at least one of the following groups of cross-sectional shapes: rectangular, cylindrical, elliptical, rhombus, cruciate, quadrilateral, pentagonal, hexagonal, octagonal, asymmetrical, and oak barrel.

[0016] The shapes of multiple pairs of nanostructures may all be the same. Alternatively, the shapes of multiple pairs of nanostructures may be partially the same, while the shapes of the other pairs of nanostructures may be different.

[0017] The pattern sequence may be a sequential sequence, a staggered sequence, or a random sequence; or the pattern sequence may be partially sequential and partially staggered; or the pattern sequence may be partially sequential and partially random; or the pattern sequence may be partially sequential, partially staggered, and partially random.

[0018] The optical element has a first surface facing the object and a second surface facing the image. At least one of the first and second surfaces is divided into multiple horizontal rows and multiple vertical columns to form multiple pairs of nanostructures, each pair of which has a first view nanostructure and a second view nanostructure. The detection surface of the pixel detection element is divided into multiple horizontal rows and multiple vertical columns to form multiple pairs of pixel regions, each pair of which has a first view pixel region and a second view pixel region. After light rays from an object are incident on the multiple pairs of nanostructures, the light rays are guided to the first view pixel region by the first view nanostructure and to the second view pixel region by the second view nanostructure.

[0019] The first view pixel region and the second view pixel region are adjacent to each other, forming a pair of pixel regions. At least one of the total number of rows and the total number of columns is an even integer, or the first view pixel region and the second view pixel region are arranged at a fixed interval, forming a pair of pixel regions, and at least one of the total number of rows and the total number of columns is an even integer.

[0020] The present invention can be better understood by the following detailed description and embodiments with reference to the accompanying drawings. [Effects of the Invention]

[0021] The present invention significantly reduces the size and weight of a lens assembly while maintaining good optical performance.

Brief Description of the Drawings

[0022] [Figure 1] A side view of a lens and a sensor of a lens assembly according to a first embodiment of the present invention. [Figure 2] A view showing a lens and a sensor of a lens assembly according to a first embodiment of the present invention. [Figure 3] A view showing the arrangement and optical path of a lens assembly according to a first embodiment of the present invention. [Figure 4] A view showing the arrangement and optical path of a lens assembly according to a second embodiment of the present invention. [Figure 5] A view showing a lens and a sensor of a lens assembly according to a second embodiment of the present invention. [Figure 6] A view showing a lens and a sensor of a lens assembly according to a third embodiment of the present invention.

Modes for Carrying Out the Invention

[0023] The following description is made for the purpose of explaining the general principles of the present invention and should not be taken in a limiting sense. The scope of the present invention is best determined by referring to the appended claims.

[0024] The present invention provides a lens assembly having, in order from the object side to the image side, an optical element including a plurality of pairs of nanostructures, and a pixel detection element including a plurality of pairs of pixel regions. Each pair of nanostructures has a first view nanostructure and a second view nanostructure. An image of a first view of an object is formed on a first view pixel region by the first view nanostructure. An image of a second view of an object is formed on a second view pixel region by the second view nanostructure.

[0025] In the following embodiments, the lens is an optical element, and the sensor is a pixel detection element having a plurality of pixels. The optical element has a plurality of pairs of nanostructures, and each nanostructure is a nanoscale lens. In the present invention, for example, each nanoscale lens indicated as L11, L12, L13, L14, L11'', L12'', L13'', L14'' is a first view nanostructure formed on the first surface, and each nanoscale lens indicated as R11, R12, R13, R14, R11'', R12'', R13'', R14'' is a second view nanostructure formed on the first surface. In the present invention, for example, the pixel regions labeled L11', L12', L13', L14', L11''', L12''', L13'''L14''' are the first view pixel regions, and the pixel regions indicated as R11', R12', R13', R14', R11''', R12''', R13''', R14''' are the second view regions.

[0026] A lens assembly according to a first embodiment of the present invention is shown in Figures 1, 2, and 3. Figure 1 is a side view of the lens and sensor of the lens assembly according to a first embodiment of the present invention. Figure 2 is a diagram showing the lens and sensor of the lens assembly according to a first embodiment of the present invention. An optical element comprising a plurality of pairs of nanostructures is a metalens, and all embodiments of optical elements in the specification of the present invention are described using metalenses as examples. The metalens 110 in Figure 2 has a first surface 1101 and a second surface 1103 when viewed from the second surface 1103 toward the first surface 1101. The first surface 1101 has a plurality of nanoscale nanostructures 110ML, and the first surface 1101 is divided into a first incident region 1101L and a second incident region 1101R. The first incident region 1101L and the second incident region 1101R each have a plurality of nanostructures 110ML. When light rays from an object are incident on a nanostructure 110ML, each nanostructure alters the direction of light propagation from its original direction. Depending on the actual requirements, each nanostructure 110ML on the first incident region 1101L and each nanostructure 110ML on the second incident region 1101R can be designed to direct the light rays in any desired direction. The patterns, or structures, of the nanostructures 110ML can be rectangular, cylindrical, elliptical, rhombic, cruciate, or polygonal. All nanostructures 110ML may have the same pattern or structure, or some may have the same pattern or structure while others have different patterns or structures. Alternatively, each nanostructure 110ML may have at least two different patterns. The pixel detection element 130 in Figure 2 has a detection surface 1301 and a bottom surface 1303, and is viewed visually from the bottom surface 1303 to the detection surface 1301. The detection surface 1301 is further divided into a first view pixel region 1301L and a second view pixel region 1301R. Refer to Figure 3. Figure 3 is a diagram showing the arrangement and optical path of a lens assembly according to a first embodiment of the present invention. The lens assembly 100 has a metalens 110 and an image sensing element 130 in order from the object side to the image side along axis AX1.The first surface 1101 of the metalens 110 faces the object side, and the second surface 1103 faces the image side. The first surface 1101 is further divided by axis AX1 into a first incident region 1101L and a second incident region 1101R. The detection surface 1301 of the sensor 130 faces the object side. The detection surface 1301 is further divided by axis AX1 into a first view pixel region 1301L and a second view pixel region 1301R. The first incident region 1101L corresponds to the first view pixel region 1301L, and both the first incident region 1101L and the first view pixel region 1301L are located on one side of axis AX1. The second incident region 1101R corresponds to the second view pixel region 1301R, and both the second incident region 1101R and the second view pixel region 1301R are located on the other side of axis AX1. After a ray from object 150 enters the first incident region 1101L, the nanostructure 110ML of the first incident region 1101L is designed to guide the ray to the first view pixel region 1301L to form a first view image of the object. Similarly, the nanostructure 110MR of the second incident region 1101R is designed to guide the ray to the second view pixel region 1301R to form a second view image of the object. In the first embodiment of the present invention, for example, the first view pixel region 1301L works in cooperation with the first incident region 1101L to form a left view image of object 150, and the second view pixel region 1301R works in cooperation with the second incident region 1101R to form a right view image of object 150. Finally, the left view image and the right view image together form a stereoscopic image of the object having depth perception features similar to those of the human eye. The above description does not limit the scope of the claims in the present invention. Similarly, the first view pixel region 1301L works in cooperation with the first incident region 1101L to form an upper view image of object 150, and the second view pixel region 1301R works in cooperation with the second incident region 1101R to form a lower view image of object 150.

[0027] A lens assembly according to a second embodiment of the present invention is described below. Refer to Figures 4 and 5. Figure 4 is a diagram showing the arrangement and optical path of the lens assembly according to the second embodiment of the present invention. Figure 5 is a diagram showing the lens and sensor of the lens assembly according to the second embodiment of the present invention. The metalens 210 in Figure 5 has a first surface 2101 (facing the object side) and a second surface 2103 (facing the image side), and is a visual view of the first surface 2101 from the second surface 2103. The pixel detection element 230 of the second embodiment has a detection surface 2301 (facing the object side) and a bottom surface 2303 (facing the image side), and is a visual view of the detection surface 2301 from the bottom surface 2303. The first surface 2101 of the metalens 210 has a plurality of nanoscale nanostructures 210ML, which are divided into even-numbered rows of incident regions horizontally and into the same even-numbered rows of incident regions vertically. In the example of the second embodiment, the first surface is divided into eight incident regions horizontally and into eight incident regions vertically. Thus, the first surface is divided into a total of 64 (=8 × 8) incident regions, and each incident region has its nanostructure 210ML. As shown in Figure 5, the first row 2101R1 of the first surface 2101 of the metalens 210 is marked from left to right and top to bottom, from the second surface 2103 toward the first surface 2101 (facing the object side), and includes: nanostructure L11 in the first row, first column; nanostructure R11 in the first row, second column; nanostructure L12 in the first row, third column; nanostructure R12 in the first row, fourth column; nanostructure L13 in the first row, fifth column; nanostructure R13 in the first row, sixth column; nanostructure L14 in the first row, seventh column; and nanostructure R14 in the first row, eighth column. Ultimately, the eighth row 2101R8 contains: nanostructure L81 in the first column of the eighth row, nanostructure R81 in the second column of the eighth row, nanostructure L82 in the third column of the eighth row, nanostructure R82 in the fourth column of the eighth row, nanostructure L83 in the fifth column of the eighth row, nanostructure R83 in the sixth column of the eighth row, nanostructure L84 in the seventh column of the eighth row, and nanostructure R84 in the eighth column of the eighth row. As a result, the nanostructure Lmn (where m and n are positive integers) formed on the first surface 2101 is located in the mth row and the (2n-1)th column, and the nanostructure Rmn (where m and n are positive integers) formed on the first surface is located in the mth row and the (2n)th column.Here, m is a positive integer from 1 to a, n is a positive integer from 1 to b / 2, a is the total number of rows, and b is the total number of columns, and both a and b are even integers. Light rays from an object are incident on the first surface of the metalens, and the propagation of light is guided in different directions by multiple nanostructures 210ML. Based on the actual demands of the design, each of the multiple nanostructures 210ML is designed to guide the light rays in any desired direction. The pixel detection element 230 has a detection surface 2301 and a bottom surface 2303. The detection surface 2301 is further divided into multiple pixel regions; in the second embodiment of the present invention, the number of rows in the pixel region is equal to the number of rows in the nanostructure, and the number of columns in the pixel region is equal to the number of columns in the nanostructure. In the example of the second embodiment, the detection surface is divided into 8 rows horizontally, and the detection surface is divided into 8 columns vertically. Thus, the detection surface is divided into a total of 64 (=8 × 8) pixel regions. As shown in Figure 5, the first row 2301R1 of the detection surface 2301 of the pixel detection element 230 is marked from left to right and top to bottom, starting from the bottom surface 2303 and moving toward the detection surface 2301 (facing the object side), and includes: the pixel region L11' of the first row, first column; the pixel region R11' of the first row, second column; the pixel region L12' of the first row, third column; the pixel region R12' of the first row, fourth column; the pixel region L13' of the first row, fifth column; the pixel region R13' of the first row, sixth column; the pixel region L14' of the first row, seventh column; and the pixel region R14' of the first row, eighth column. Ultimately, the eighth row 23001R8 of the detection surface 2301 has the following: pixel region L81' in the first column of the eighth row, pixel region R81' in the second column of the eighth row, pixel region L82' in the third column of the eighth row, pixel region R82' in the fourth column of the eighth row, pixel region L83' in the fifth column of the eighth row, pixel region R83' in the sixth column of the eighth row, pixel region L84' in the seventh column of the eighth row, and pixel region R84' in the eighth column of the eighth row. As a result, the pixel region Lmn' (where m and n are positive integers) formed on the detection surface 2301 is located in the mth row and the (2n-1)th column, and the pixel region Rmn' (where m and n are positive integers) formed on the detection surface 2301 is located in the mth row and the (2n)th column. Here, m is a positive integer from 1 to c, n is a positive integer from 1 to d / 2, c is the total number of rows, and d is the total number of columns, and both c and d are even integers.In the second embodiment, when the lens assembly forms an image of object 250, the optical path of light from object 250 through the metalens 210 is different from the optical path of light from object 150 through the metalens 110. In the second embodiment of the present invention, a ray from object 250 passing through the nanostructure L11 of the metalens 120 is directed to the pixel region L11' in the first row, first column of the detection surface, a ray from object 250 passing through the nanostructure R11 of the metalens 210 is directed to the pixel region R11' in the first row, second column of the detection surface, a ray from object 250 passing through the nanostructure L12 of the metalens 210 is directed to the pixel region L12' in the first row, third column of the detection surface, and a ray passing through object 250 and the nanostructure R12 of the metalens 210 is directed to the pixel region R12 in the first row, fourth column of the detection surface. Guided by ', a ray from object 250 passing through the nanostructure L13 of the metalens 210 is guided to the pixel region L13' in the first row, fifth column of the detection surface, a ray from object 250 passing through the nanostructure R13 of the metalens 210 is guided to the pixel region R13' in the first row, sixth column of the detection surface, a ray from object 250 passing through the nanostructure L14 of the metalens 210 is guided to the pixel region L14' in the first row, seventh column of the detection surface, and a ray from object 250 passing through the nanostructure R14 of the metalens 210 is guided to the pixel region R14' in the first row, eighth column of the detection surface.Ultimately, light rays from object 250 passing through the nanostructure L81 of the metalens 210 are directed to pixel region L81' in the eighth row, first column of the detection surface; light rays from object 250 passing through the nanostructure R81 of the metalens 210 are directed to pixel region R81' in the eighth row, second column of the detection surface; light rays from object 250 passing through the nanostructure L82 of the metalens 210 are directed to pixel region L82' in the eighth row, third column of the detection surface; and light rays from object 250 passing through the nanostructure R82 of the metalens 210 are directed to pixel region R82' in the eighth row, fourth column of the detection surface. As a result, the light rays from object 250 passing through the nanostructure L83 of the metalens 210 are directed to the pixel region L83' in the eighth row and fifth column of the detection surface, the light rays from object 250 passing through the nanostructure R83 of the metalens 210 are directed to the pixel region R83' in the eighth row and sixth column of the detection surface, the light rays from object 250 passing through the nanostructure L84 of the metalens 210 are directed to the pixel region L84' in the eighth row and seventh column of the detection surface, and the light rays from object 250 passing through the nanostructure R84 of the metalens 210 are directed to the pixel region R84' in the eighth row and eighth column of the detection surface. In the second embodiment, m is an integer selected from 1 to 8, and n is an integer selected from 1 to 8. Furthermore, in the second embodiment of the present invention, the first surface and the detection surface of the metalens are divided into an incident region and a sensing region in matrix form, respectively, and the number of rows and columns of the matrix is ​​even. Light rays from an object enter the incident region in matrix form, and after passing through the incident region, the light rays are guided sequentially from left to right and top to bottom to each of the multiple pairs of pixel regions by each of the multiple pairs of nanostructures. Each pair of nanostructures receives a left view and a right view of the corresponding position of the light ray from the object, and then passes through such pairs of nanostructures to form left view and right view images of the corresponding position of the object by the corresponding pair of pixel regions.Specifically, the pixel region L11' in the first row and first column of the detection surface forms a left-view image at the corresponding position of the object, and the pixel region R11' in the first row and second column of the detection surface forms a right-view image at the corresponding position of the object. The pixel region L12' in the first row and third column of the detection surface forms a left-view image at the corresponding position of the object, and the pixel region R12' in the first row and fourth column of the detection surface forms a right-view image at the corresponding position of the object. Similarly, the pixel region L81' in the eighth row and first column of the detection surface forms a left-view image at the corresponding position of the object, and the pixel region R81' in the eighth row and second column of the detection surface forms a right-view image at the corresponding position of the object. By analogy, from the first row to the eighth row of the detection surface, each pair of pixel regions is grouped together to form a left-view image and a right-view image at the corresponding position, respectively. Thus, the left-view image of the corresponding position and the right-view image of the corresponding position, generated by each pair of pixel regions, together form a three-dimensional image of the object having depth perception features. The above description in the second embodiment does not limit the scope of the claims in the present invention. Similarly, each pair of pixel regions, in cooperation with the corresponding pair of nanostructures, form an upper-view image and a lower-view image of the object.

[0028] A third embodiment of the lens assembly of the present invention is described below. Referring to Figure 6, Figure 6 shows the lens and sensor of the lens assembly according to the third embodiment of the present invention. The metalens 310 in Figure 6 has a first surface (facing the object side) and a second surface (facing the image side) containing a plurality of nanostructures (not shown in this drawing), and is viewed from the second surface toward the first surface. The pixel detection element 330 of the third embodiment has a detection surface (facing the object side) and a bottom surface (facing the image side), and is viewed from the bottom surface toward the detection surface. The first surface of the metalens 310 has a plurality of nanoscale nanostructures and is divided horizontally into an even number of rows of incident regions and vertically into an even number of columns of incident regions. In the embodiment of the third embodiment, the first surface is divided horizontally into 8 rows of incident regions, and the first surface is divided vertically into 8 columns of incident regions. Thus, the first surface is divided into a total of 64 (=8 × 8) incident regions, and each incident region has its own nanostructure. As shown in Figure 6, the first row 3101R1 of the first surface of the metalens 310 is marked from left to right and top to bottom, from the second surface toward the first surface (facing the object side), and includes: nanostructure L11'' in the first row, first column; nanostructure R11'' in the first row, second column; nanostructure L12'' in the first row, third column; nanostructure R12'' in the first row, fourth column; nanostructure L13'' in the first row, fifth column; nanostructure R13'' in the first row, sixth column; nanostructure L14'' in the first row, seventh column; and nanostructure R14'' in the first row, eighth column. Ultimately, the eighth row contains: nanostructure L81'' in the first column of the eighth row, nanostructure R81'' in the second column of the eighth row, nanostructure L82'' in the third column of the eighth row, nanostructure R82'' in the fourth column of the eighth row, nanostructure L83'' in the fifth column of the eighth row, nanostructure R83'' in the sixth column of the eighth row, nanostructure L84'' in the seventh column of the eighth row, and nanostructure R84'' in the eighth column of the eighth row. As a result, the nanostructure Lmn'' (where m and n are positive integers) formed on the first surface is located in the mth row and the (2n-1)th column, and the nanostructure Rmn'' (where m and n are positive integers) formed on the first surface is located in the mth row and the (2n)th column.Here, m is a positive integer from 1 to a, n is a positive integer from 1 to b / 2, a is the total number of rows, b is the total number of columns, and both a and b are even integers. When light rays from an object enter the metalens, the propagation of light is guided in different directions by multiple nanostructures. Based on the requirements of the actual design, each of the multiple nanostructures can be designed to guide the light rays in any desired direction. The pixel detection element 330 has a detection surface 3301 and a bottom surface. The detection surface is further divided into multiple pixel regions. In the third embodiment of the present invention, the number of rows in the pixel region is equal to the number of rows in the nanostructure, and the number of columns in the pixel region is equal to the number of columns in the nanostructure. In the example of the third embodiment, the detection surface is divided into 8 rows horizontally, and the detection surface is divided into 8 columns vertically. Thus, the detection surface is divided into a total of 64 (=8 × 8) pixel regions. As shown in Figure 6, the first row 3301R1 of the detection surface of the pixel detection element 330 is marked from left to right and top to bottom, starting from the bottom surface and moving toward the detection surface (facing the object side), and includes: pixel region L11''' in the first row, first column; pixel region L12''' in the first row, second column; pixel region L13''' in the first row, third column; pixel region L14''' in the first row, fourth column; pixel region R11''' in the first row, fifth column; pixel region R12''' in the first row, sixth column; pixel region R13''' in the first row, seventh column; and pixel region R14''' in the first row, eighth column. Ultimately, the eighth row 3301R8 of the detection surface includes: pixel region L81''' in the first column of the eighth row, pixel region L82''' in the second column of the eighth row, pixel region L83''' in the third column of the eighth row, pixel region L84''' in the fourth column of the eighth row, pixel region R81''' in the fifth column of the eighth row, pixel region R82''' in the sixth column of the eighth row, pixel region R83''' in the seventh column of the eighth row, and pixel region R84''' in the eighth column of the eighth row. As a result, the pixel region Lmn''' (where m and n are positive integers) formed on the detection surface 3301 is located in the mth row and nth column when n satisfies the condition 1st / 2, and the pixel region Rmn''' (where m and n are positive integers) formed on the detection surface 3301 is located in the mth row and nth column when n satisfies the condition d / 2nd; Here, m is a positive integer between 1 and c, n is a positive integer between 1 and d, c is the total number of rows, d is the total number of columns, and both c and d are even integers.In the third embodiment, the lens assembly forms an image of an object, and the optical path of the light rays from the object through the metalens 310 is partially the same as that of the second embodiment. However, in the third embodiment of the present invention, the light rays from the object passing through the nanostructure L11'' in the first row and first column on the metalens 310 are directed to the pixel area L11'' in the first row and first column of the detection surface, the light rays from the object passing through the nanostructure L12'' in the first row and third column of the metalens 310 are directed to the pixel area L12'''' in the first row and second column of the detection surface, the light rays from the object passing through the nanostructure L13'' in the first row and fifth column of the metalens 310 are directed to the pixel area L13'''' in the first row and third column of the detection surface, and the light rays from the object passing through the nanostructure L14'' in the first row and seventh column of the metalens 310 are directed to the pixel area L14'''' in the first row and fourth column of the detection surface. As a result, light rays from the object, passing through the nanostructure located in the m-th row and (2n-1)-th column, are directed to the pixel region of the m-th row and n-th column of the detection surface. Here, m and n are positive integers, m is a positive integer from 1 to a, n is a positive integer from 1 to b / 2, a is the total number of rows of the metalens, b is the total number of columns of the metalens, and both a and b are even numbers. In the third embodiment, a is equal to 8, which is a multiple of 4, and b is equal to 8, which is a multiple of 4. Furthermore, in the third embodiment of the present invention, a ray from an object passing through the nanostructure R11'' in the first row and second column on the metalens 310 is guided to the pixel region R11'''' in the first row and fifth column on the detection surface; a ray from an object passing through the nanostructure R12'' in the first row and fourth column on the metalens 310 is guided to the pixel region R12'''' in the first row and sixth column on the detection surface; a ray from an object passing through the nanostructure R13'' in the first row and sixth column on the metalens 310 is guided to the pixel region R13'''' in the first row and seventh column on the detection surface; and a ray from an object passing through the nanostructure R14'' in the first row and eighth column on the metalens 310 is guided to the pixel region R14'''' in the first row and eighth column on the detection surface. As a result, a ray from an object passing through the nanostructure located in the m-th row and (2n)-th column is guided to the pixel region in the m-th row and (n+b / 2)-th column on the detection surface.Here, m and n are positive integers, m is a positive integer from 1 to a, n is a positive integer from 1 to b / 2, a is the total number of rows in the metalens, b is the total number of columns in the metalens, and both a and b are even numbers. Ultimately, light rays from the object passing through the nanostructure L81'' in the eighth row, first column on the metalens 310 are directed to the pixel region L81'' in the eighth row, first column on the detection surface; light rays from the object passing through the nanostructure L82'' in the eighth row, third column on the metalens 310 are directed to the pixel region L82''' in the eighth row, second column on the detection surface; light rays from the object passing through the nanostructure L83'' in the eighth row, fifth column on the metalens 310 are directed to the pixel region L83''' in the eighth row, third column on the detection surface; and light rays from the object passing through the nanostructure L84'' in the eighth row, seventh column on the metalens 310 are directed to the pixel region L84''' in the eighth row, fourth column on the detection surface. Therefore, a ray from the object passing through the nanostructure R81'' in the eighth row and second column on the metalens 310 is directed to the pixel region R81'''' in the eighth row and fifth column on the detection surface; a ray from the object passing through the nanostructure R82'' in the eighth row and fourth column on the metalens 310 is directed to the pixel region R82'''' in the eighth row and sixth column on the detection surface; a ray from the object passing through the nanostructure R83'' in the eighth row and sixth column on the metalens 310 is directed to the pixel region R83'''' in the eighth row and seventh column on the detection surface; and a ray from the object passing through the nanostructure R84'' in the eighth row and eighth column on the metalens 310 is directed to the pixel region R84'''' in the eighth row and eighth column on the detection surface. Furthermore, in a third embodiment of the present invention, the first surface of the metalens and the detection surface of the sensor 330 are each divided in a matrix format into an incident region and a sensing region, and the sensing region of the sensor 330 is further divided into a first detection region and a second detection region. The first detection region and the second detection region form left view and right view images, or upper view images and lower view images, at corresponding positions on the object. Light rays from the object enter the incident region in a matrix format, and after passing through the incident region, the light rays are guided sequentially from left to right and top to bottom to each of the multiple pairs of pixel regions by each of the multiple pairs of nanostructures.Each pair of nanostructures receives the left-side view and the right-side view of the corresponding position of light rays from the object, and after passing through such pairs of nanostructures, the corresponding pairs of pixel regions form left-side view and right-side view images of the corresponding position of the object. In the third embodiment, each pair of pixel regions is spaced apart, with one pixel region formed on the first detection region to become the first view pixel region, and the other pixel region formed on the second detection region to become the second view pixel region. In the third embodiment, the first detection region has pixel regions in the first to fourth rows and receives the left-side view image of the object, while the second detection region has pixel regions in the fifth to eighth rows and receives the right-side view image of the object. In this way, after light rays from the object enter and pass through the nanostructures of the metalens 310, the rays are guided to the first and second detection regions of the sensor 330, respectively. Therefore, the left view image and the right view image generated by the first and second detection regions together form a three-dimensional image of the object having depth perception features. The above description of the third embodiment does not limit the scope of the claims in the present invention. Similarly, the first and second detection regions of the sensor 330 cooperate with the corresponding pair of nanostructures to form the upper view image and the lower view image of the object.

[0029] With respect to the lens assemblies of the second and third embodiments, the incident region of the metalens and the sensing surface of the sensor are divided into an 8x8 matrix. However, some embodiments, without limiting the scope of the claims in the present invention, can also be divided into a KxK matrix, where K is an even integer. Alternatively, in the present invention, the incident region of the metalens and the sensing surface of the sensor can be divided into a KxL matrix, where K is an even integer and L is a positive integer. For example, the incident region of the metalens and the sensing surface of the sensor can be divided into matrices such as 8x11, 10x7, or 6x3. More specifically, the incident region is divided horizontally into a total of even rows and vertically into a total of positive integer columns, and the sensing region is divided horizontally into a total of even rows and vertically into a total of positive integer columns. In this even-numbered row configuration, each pair of nanostructures is arranged sequentially in a pair of rows in the vertical direction, and each pair of pixel regions is arranged sequentially in a pair of rows in the vertical direction. Similarly, in this invention, the incident region of the metalens and the detection surface of the sensor can be divided into a K × L matrix, where K is a positive integer and L is an even integer. For example, the incident region of the metalens and the detection surface of the sensor can be divided into a matrix of 9 × 12, 11 × 16, or 13 × 24 regions. More specifically, the incident region is divided horizontally into a total number of rows equal to a positive integer and vertically into a total number of columns equal to an even integer, and the detection region is divided horizontally into a total number of rows equal to a positive integer and vertically into a total number of columns equal to an even integer. In this even-numbered column configuration, each pair of nanostructures is arranged sequentially in a pair of columns in the horizontal direction. In addition, at least one of the total number of rows and the total number of columns is an even integer.

[0030] In the first, second, and third embodiments, the patterns or structures of the multiple pairs of nanostructures are rectangular, cylindrical, elliptical, rhombus, cruciform, quadrilateral, pentagonal, hexagonal, octagonal, asymmetrical, oak barrel cross-sectional shapes, or all or some of the above shapes, and each of the multiple nanostructures can be designed to guide a light ray in any desired direction, so that the light ray can be guided to a desired sensing region. The shapes of the multiple pairs of nanostructures may all be the same, or the shapes of the multiple pairs of nanostructures may be partially the same, while the shapes of the other pairs of nanostructures are different.

[0031] In the first, second, and third embodiments, the patterns or structures of multiple pairs of nanostructures are manufactured by imprinting or a semiconductor process.

[0032] With respect to the lens assemblies of the first, second, and third embodiments, the size of the metalens nanostructure is less than 5 nanometers, but this does not limit the scope of the claims of the present invention. With respect to the application of the lens assemblies of the present invention, the size of the metalens nanostructure is 100 nanometers, 90 nanometers, 80 nanometers, 70 nanometers, 60 nanometers, 50 nanometers, 40 nanometers, 30 nanometers, 20 nanometers, 10 nanometers, or 2 nanometers. Thus, in the present invention, the size of the metalens nanostructure is between 1 nanometer and 99 nanometers.

[0033] Regarding the lens assemblies of the first, second, and third embodiments, the nanostructure of the metalens is formed on a first surface facing the object, a second surface facing the image, or on both the first and second surfaces. In addition, the shown metalenses consist of one metalens or a combination of multiple metalenses. The pattern arrangement or structure of the nanostructure is sequential, staggered, or random. The pattern arrangement or structure of the nanostructure is partially sequential and partially staggered. The pattern arrangement or structure of the nanostructure is partially sequential and partially random. Furthermore, the pattern arrangement or structure of the nanostructure is partially sequential, partially staggered, and partially random.

[0034] In this invention, if the total number of columns is even, the total number of rows may be odd or even.

[0035] While the present invention has been illustrated by examples and preferred embodiments, it should be understood that the invention is not limited thereto. Conversely, the invention is intended to encompass a variety of modifications and similar configurations and procedures, and therefore the appended claims should be most broadly interpreted to encompass all such modifications and similar configurations and procedures. [Explanation of symbols]

[0036] 100...Lens Assembly 110, 210, 310... Metalens 1101...first surface 1103…Second surface 110ML…Nanostructure 1101L…First incidence area 1101R…Second incidence area 130, 230, 330… detection elements 1301...Detection surface 1303, 2303... base 1301L…First View Pixel Area 1301R...Second view pixel area 150, 250... objects AX1, AX2... axes 2101R1, 3101R1... the first row of the first surface 2301R1, 3301R1... the first row of the inspection surface L11, R11, L12, R12, L13, R13, L14, R14... incident regions L21, R21, L22, R22, L23, R23, L24, R24... incident regions L31, R31, L32, R32, L33, R33, L34, R34... incident regions L41, R41, L42, R42, L43, R43, L44, R44... incident regions L51, R51, L52, R52, L53, R53, L54, R54... incident regions L61, R61, L62, R62, L63, R63, L64, R64... incident regions L71, R71, L72, R72, L73, R73, L74, R74... incident regions L81, R81, L82, R82, L83, R83, L84, R84... incident regions L11’, R11’, L12’, R12’, L13’, R13’, L14’, R14’... detection regions L21’, R21’, L22’, R22’, L23’, R23’, L24’, R24’... detection regions L31’, R31’, L32’, R32’, L33’, R33’, L34’, R34’... detection regions L41’, R41’, L42’, R42’, L43’, R43’, L44’, R44’... detection regions L51’, R51’, L52’, R52’, L53’, R53’, L54’, R54’... detection regions L61’, R61’, L62’, R62’, L63’, R63’, L64’, R64’... detection regions L71’, R71’, L72’, R72’, L73’, R73’, L74’, R74’... detection regions L81’, R81’, L82’, R82’, L83’, R83’, L84’, R84’... detection regions L11'', R11'', L12'', R12''...Incidence area L13'', R13'', L14'', R14''...Incidence area L21'', R21'', L22'', R22''...Incidence area L23'', R23'', L24'', R24''...Incidence area L31'', R31'', L32'', R32''...Incidence area L33'', R33'', L34'', R34''...Incidence area L41'', R41'', L42'', R42''...Incidence area L43'', R43'', L44'', R44''...Incidence area L51'', R51'', L52'', R52''...Incidence area L53'', R53'', L54'', R54''...Incidence area L61'', R61'', L62'', R62''...Incidence area L63'', R63'', L64'', R64''...Incidence area L71'', R71'', L72'', R72''...Incidence area L73'', R73'', L74'', R74''...Incidence area L81'', R81'', L82'', R82''...Incidence area L83'', R83'', L84'', R84''...Incidence area L11''', L12''', L13''', L14'''... Detection regions R11''', R12''', R13''', R14'''... Detection regions L21''', L22''', L23''', L24'''... Detection regions R21''', R22''', R23''', R24'''... Detection regions L31''', L32''', L33''', L34'''... Detection regions R31''', R32''', R33''', R34'''... Detection regions L41''', L42''', L43''', L44'''... Detection regions R41''', R42''', R43''', R44'''... Detection regions L51''', L52''', L53''', L54'''... Detection regions R51''', R52''', R53''', R54'''... Detection regions L61''', L62''', L63''', L64'''... Detection regions R61''', R62''', R63''', R64'''... Detection regions L71''', L72''', L73''', L74'''... Detection regions R71''', R72''', R73''', R74'''... Detection regions L81''', L82''', L83''', L84'''... Detection regions R81''', R82''', R83''', R84'''... Detection regions

Claims

1. A lens assembly, arranged in order from the object side to the image side, Optical elements having multiple pairs of nanostructures, and It has a pixel detection element having multiple pairs of pixel regions, Each pair of nanostructures has a first-view nanostructure and a second-view nanostructure. Each pair of pixel regions has a first view pixel region and a second view pixel region. A res assembly characterized in that the first view nanostructure guides light rays from the object to form an image of the object on the first view pixel region, and the second view nanostructure guides light rays from the object to form an image of the object on the second view pixel region.

2. The first view nanostructure and the second view nanostructure are adjacent to each other, forming a pair of nanostructures. The lens assembly according to claim 1, characterized in that all of the aforementioned pairs of nanostructures are arranged in sequence to form a plurality of pairs of nanostructures.

3. The first view pixel region and the second view pixel region are adjacent to each other, forming a pair of pixel regions. The lens assembly according to claim 2, characterized in that all of the aforementioned pairs of pixel regions are arranged in order to form a plurality of pairs of pixel regions.

4. The first view nanostructure and the second view nanostructure are arranged at a certain interval to form a pair of nanostructures. The lens assembly according to claim 1, characterized in that all pairs of nanostructures are arranged periodically to form a plurality of pairs of nanostructures.

5. The first view pixel region and the second view pixel region are arranged at a certain interval to form a pair of pixel regions. The lens assembly according to claim 2 or 4, characterized in that all pairs of pixel regions are arranged periodically to form a plurality of pairs of pixel regions.

6. The patterns or structures of the first view nanostructure and the second view nanostructure are the same or different, and The lens assembly according to claim 1, characterized in that the sizes of the first view nanostructure and the second view nanostructure are the same or different, and the plurality of pairs of nanostructures are arranged on the first surface and the second surface, or the plurality of pairs of nanostructures are arranged on the first surface or the second surface.

7. The optical element has a first surface facing the object and a second surface facing the image. The pixel detection element is a sensor having a detection surface facing the object, and a plurality of pairs of pixel regions are formed on the detection surface, and Light rays from the object side are guided to the first view pixel region after passing through the first view nanostructure, and light rays from the object side are guided to the second view pixel region after passing through the second view nanostructure. The lens assembly according to feature 1.

8. The first surface of the optical element is divided into a first incident region facing the object and a second incident region facing the object. The pixel detection element is divided into a first detection region facing the object and a second detection region facing the object. The first and second incident regions are divided horizontally into a total of a rows and vertically into a total of b columns, such that the sum of the incident regions is a × b, where a is a positive integer of 2 or more and b is a positive integer of 1 or more, or a is a positive integer of 1 or more and b is a positive integer of 2 or more, and each incident region has its own nanostructure. The lens assembly according to claim 7, characterized in that the first detection region and the second detection region are divided horizontally into a total number of rows equal to the number of rows in the incident region and into a total number of columns equal to the number of columns in the incident region.

9. The lens assembly according to claim 8, characterized in that the light ray from the object enters the incident region of the m-th row and n-th column, and is then guided to the corresponding sensing region of the m-th row and n-th column, where "m" is a positive integer from 1 to a, and "n" is a positive integer from 1 to b.

10. The light ray from the object enters the incident region of the m-th row and the (2n-1)-th column, and is then guided to the sensing region of the m-th row and the n-th column, where "m" is a positive integer from 1 to a, and "n" is a positive integer from 1 to b / 2. The lens assembly according to claim 8, characterized in that the light ray from the object enters the incident region of the m-th row and the 2n-th column, and is then guided to the sensing region of the m-th row and the (b / 2+n)-th column, where "m" is a positive integer from 1 to a, and "n" is a positive integer from 1 to b / 2.

11. The lens assembly according to claim 9 or 10, characterized in that the number of columns in the incident region is equal to the number of columns in the sensing region, and the number of rows in the incident region is equal to the number of rows in the sensing region.

12. The lens assembly according to claim 7, characterized in that the patterns of multiple pairs of nanostructures are selected from at least one of the group of rectangular, cylindrical, elliptical, rhombus, cruciate, quadrilateral, pentagonal, hexagonal, octagonal, asymmetrical, and oak barrel cross-sectional shapes.

13. The lens assembly according to claim 12, characterized in that the shapes of the plurality of pairs of nanostructures may all be the same, or the shapes of the plurality of pairs of nanostructures may be partially the same and the shapes of the other pairs of nanostructures may be different.

14. The lens assembly according to claim 12, characterized in that the arrangement of the pattern is a sequential arrangement, a staggered arrangement, or a random arrangement, or the arrangement of the pattern is partially a sequential arrangement and partially a staggered arrangement, or the arrangement of the pattern is partially a sequential arrangement and partially a random arrangement, or the arrangement of the pattern is partially a sequential arrangement, partially a staggered arrangement and partially a random arrangement.

15. The optical element has a first surface facing the object and a second surface facing the image, and at least one of the first and second surfaces is divided into a plurality of horizontal rows and a plurality of vertical columns to form a plurality of pairs of nanostructures, and each pair of nanostructures has a first view nanostructure and a second view nanostructure. The detection surface of the pixel detection element is divided into a plurality of horizontal rows and a plurality of vertical columns to form a plurality of pairs of pixel regions, and each pair of pixel regions has a first view pixel region and a second view pixel region, and, The lens assembly according to claim 1, characterized in that, after the light ray from the object is incident on the plurality of pairs of nanostructures, the light ray is guided to the first view pixel region by the first view nanostructure, and the light ray is guided to the second view pixel region by the second view nanostructure.

16. The first view pixel region and the second view pixel region are adjacent to each other, forming a pair of pixel regions, and At least one of the total number of rows and the total number of columns is an even integer, or the first view pixel region and the second view pixel region are arranged at a constant interval, forming a pair of pixel regions, and The lens assembly according to claim 15, characterized in that at least one of the total number of rows and the total number of columns is an even integer.

Images