WO2021179109A1 - 光波导单元阵列和具有其的光学透镜 - Google Patents

光波导单元阵列和具有其的光学透镜 Download PDF

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Publication number
WO2021179109A1
WO2021179109A1 PCT/CN2020/078371 CN2020078371W WO2021179109A1 WO 2021179109 A1 WO2021179109 A1 WO 2021179109A1 CN 2020078371 W CN2020078371 W CN 2020078371W WO 2021179109 A1 WO2021179109 A1 WO 2021179109A1
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optical waveguide
waveguide unit
unit array
array
optical
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PCT/CN2020/078371
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English (en)
French (fr)
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范超
韩东成
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安徽省东超科技有限公司
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Priority to PCT/CN2020/078371 priority Critical patent/WO2021179109A1/zh
Publication of WO2021179109A1 publication Critical patent/WO2021179109A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
    • G02B30/56—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels by projecting aerial or floating images
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors

Definitions

  • the present invention relates to the field of optical technology, in particular to an optical waveguide unit array and an optical lens having the same.
  • the slab lens is an orthogonal structure of the dual optical waveguide unit array.
  • the thickness of each layer of the optical waveguide unit in the optical waveguide unit array is usually reduced to achieve the goal.
  • the The method usually greatly increases the difficulty of the process, thereby greatly increasing the manufacturing cost.
  • an object of the present invention is to provide an optical waveguide unit array, which improves the imaging resolution, realizes high-quality imaging, and reduces the process difficulty and cost.
  • Another object of the present invention is to provide an optical lens having the above-mentioned optical waveguide unit array.
  • An optical waveguide unit array includes: a first optical waveguide unit array, the first optical waveguide unit array includes at least one first optical waveguide unit and a plurality of second optical waveguide units, the The thickness of the first optical waveguide unit is smaller than the thickness of the second optical waveguide unit, and at least one of the first optical waveguide unit and a plurality of the second optical waveguide units are connected in the thickness direction of the first optical waveguide unit In a single-row multi-column structure; the second optical waveguide unit array, the second optical waveguide unit array includes at least one third optical waveguide unit and a plurality of fourth optical waveguide units, the thickness of the third optical waveguide unit is less than the The thickness of the fourth optical waveguide unit, at least one of the third optical waveguide unit and the plurality of fourth optical waveguide units are connected in a single-row multi-column structure in the thickness direction of the third optical waveguide unit; The first optical waveguide unit array and the second optical waveguide unit array are connected to each other in
  • the optical waveguide unit array of the embodiment of the present invention by arranging the optical waveguide unit of the first optical waveguide unit array into the first optical waveguide unit and the second optical waveguide unit with different thicknesses, the optical waveguide unit of the second optical waveguide unit array
  • the third optical waveguide unit and the fourth optical waveguide unit with different thicknesses are arranged, and the optical waveguides of the first optical waveguide unit array and the optical waveguides of the second optical waveguide unit array are arranged in a staggered arrangement, which can effectively improve the imaging of the optical waveguide unit array Resolution.
  • the first optical waveguide unit array includes one first optical waveguide unit, and the first optical waveguide unit of the first optical waveguide unit array is located in all the second optical waveguide units.
  • the second optical waveguide unit array includes one of the third optical waveguide unit, and the third optical waveguide unit of the second optical waveguide unit array is located on all the fourth optical waveguide units
  • the first optical waveguide unit and the third optical waveguide unit are respectively located on different sides of the optical waveguide unit array.
  • the width of the second optical waveguide unit is W A1 , wherein the W A1 satisfies:
  • the width of the fourth optical waveguide unit is W B1 , where W B1 satisfies:
  • ⁇ A1 and ⁇ B1 are the incident angles corresponding to the light; n A is the refractive index of the optical waveguide material of the first optical waveguide unit array; n B is the optical waveguide material of the second optical waveguide unit array Refractive index; ⁇ A2 , ⁇ B2 are the refraction angles corresponding to the light, d A1 is the thickness of the second optical waveguide unit; d B1 is the thickness of the fourth optical waveguide unit, t A is a positive integer, t B It is 0 or other positive integers.
  • the d A1 satisfies: 0.1mm ⁇ d A1 ⁇ 10mm.
  • the d B1 satisfy: 0.1mm ⁇ d B1 ⁇ 10mm.
  • the thickness of the first optical waveguide unit is half of the thickness of the second optical waveguide unit, and the thickness of the third optical waveguide unit is less than that of the fourth optical waveguide unit.
  • the thickness of the second optical waveguide unit is equal to the thickness of the fourth optical waveguide unit.
  • two adjacent optical waveguide units of the first optical waveguide unit array are adhesively connected by a first adhesive layer, and the first adhesive layer is embedded with a first adhesive layer.
  • a particle layer, the first particle layer includes a plurality of particles, a plurality of the particles are uniformly distributed, and the heights of the plurality of the first particles are all the same;
  • two adjacent ones of the second optical waveguide unit array The optical waveguide units are adhesively connected by a second adhesive layer, the second adhesive layer is embedded with a second particle layer, the second particle layer includes a plurality of particles, and the plurality of particles are uniformly distributed , And the heights of the plurality of second particles are all equal.
  • the height of the particle layer is d gl , wherein the d gl satisfies: d gl ⁇ 0.001 mm.
  • the outer contour shape of the first optical waveguide unit array is rectangular, and the extension direction of each optical waveguide unit of the first optical waveguide unit array is the same as that of the first optical waveguide unit.
  • the angle between at least two sides of the outer contour of the array is ⁇ , where the ⁇ satisfies: 40° ⁇ 50°;
  • the outer contour shape of the second optical waveguide unit array is rectangular, and the second The angle between the extending direction of each optical waveguide unit of the optical waveguide unit array and at least two sides of the outer contour of the second optical waveguide unit array is ⁇ , where ⁇ satisfies: 40° ⁇ ⁇ 50°.
  • At least one side in the thickness direction of the first optical waveguide unit or each of the second optical waveguide units is provided with a first reflective film; the third optical waveguide unit or each At least one side in the thickness direction of the fourth optical waveguide unit is provided with a second reflective film.
  • the first reflective film is a metal film plated on the at least one side in the thickness direction of the first optical waveguide unit or each of the second optical waveguide units;
  • the second reflective film is a metal film plated on the at least one side in the thickness direction of the third optical waveguide unit or each fourth optical waveguide unit.
  • the first optical waveguide unit array and the second optical waveguide unit array are adhesively connected by an adhesive
  • the thickness of the adhesive is D gl , wherein the D gl satisfies: D gl ⁇ 0.001mm.
  • the adhesive member is a photosensitive glue or a heat-sensitive glue.
  • the optical lens according to the embodiment of the second aspect of the present invention includes: two transparent substrates, each of the transparent substrates has two optical surfaces; two optical waveguide unit arrays, the two optical waveguide unit arrays are arranged in two Between the two transparent substrates, the extension directions of the optical waveguides of the two optical waveguide unit arrays are arranged orthogonally, and each of the optical waveguide unit arrays is an optical waveguide unit array according to the embodiment of the first aspect of the present invention.
  • an anti-reflection film is provided on an optical surface of each transparent substrate away from the optical waveguide unit array.
  • Fig. 1 is a schematic diagram of an optical waveguide unit array according to an embodiment of the present invention
  • Fig. 2 is a schematic diagram of an optical lens according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of two optical waveguide unit arrays of the optical lens shown in FIG. 2;
  • FIG. 4 is a cross-sectional view of a second optical waveguide unit of the optical waveguide unit array according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of the arrangement of a plurality of optical waveguide units of an optical waveguide unit array according to an embodiment of the present invention
  • Fig. 6 is a schematic diagram of an optical waveguide unit array according to an embodiment of the present invention for reducing imaging spots.
  • first optical waveguide unit array 11: first optical waveguide unit; 12: second optical waveguide unit;
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. Further, in the description of the present invention, unless otherwise specified, “plurality” means two or more.
  • optical waveguide unit array 100 According to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
  • the optical waveguide unit array 100 includes: a first optical waveguide unit array 1 and a second optical waveguide unit array 2.
  • the first optical waveguide unit array 1 includes at least one first optical waveguide unit 11 and a plurality of second optical waveguide units 12.
  • “plurality” means two or more.
  • the thickness of the first optical waveguide unit 11 is smaller than the thickness of the second optical waveguide unit 12, and at least one first optical waveguide unit 11 and a plurality of second optical waveguide units 12 are connected in a single row in the thickness direction of the first optical waveguide unit 11 Multi-column structure.
  • the second optical waveguide unit array 2 includes at least one third optical waveguide unit 21 and a plurality of fourth optical waveguide units 22, the thickness of the third optical waveguide unit 21 is smaller than the thickness of the fourth optical waveguide unit 22, and at least one third optical waveguide unit
  • the unit 21 and the plurality of fourth optical waveguide units 22 are connected in a single-row multi-column structure in the thickness direction of the third optical waveguide unit 21.
  • the first optical waveguide unit array 1 and the second optical waveguide unit array 2 are connected to each other in the thickness direction of the optical waveguide unit array 100, and the optical waveguide extension direction of the first optical waveguide unit array 1 is parallel to the second optical waveguide unit array 2
  • the extending direction of the optical waveguide, and the corresponding optical waveguides of the first optical waveguide unit array 1 and the second optical waveguide unit array 2 are arranged in a staggered manner.
  • the first optical waveguide unit 11 and the second optical waveguide unit 12 are connected in the thickness direction of the first optical waveguide unit 11 (for example, the left-right direction in FIG. 1), and
  • the thickness of an optical waveguide unit 11 is smaller than the thickness of the second optical waveguide unit 12
  • the third optical waveguide unit 21 and the fourth optical waveguide unit 22 are connected in the thickness direction of the third optical waveguide unit 21, and the third optical waveguide unit 21
  • the thickness of the optical waveguide unit 22 is smaller than that of the fourth optical waveguide unit 22.
  • the extending direction of the optical waveguide of the first optical waveguide unit array 1 and the extending direction of the optical waveguide of the second optical waveguide unit array 2 are parallel to each other.
  • the optical waveguides corresponding to the second optical waveguide unit array 2 are arranged in a staggered arrangement (as shown in Fig. 1), thus, it can be ensured that the light is overlapped after being reflected by the first optical waveguide unit array 1 and the second optical waveguide unit array 2 Therefore, it is ensured that the spot size formed by the light on the image surface of the optical waveguide unit array 100 is smaller than the original spot size, the imaging resolution of the optical waveguide unit array 100 is improved, and the process difficulty is reduced, thereby reducing the cost.
  • the light emitted from point O on the object plane enters the second optical waveguide unit 12 and is divided into two beams, namely the dashed line and the solid line shown in the figure.
  • the dashed line of light is in the second optical waveguide unit 12
  • the number of reflections of is an even number of times, for example, it can be selected twice.
  • the dashed line of light enters the fourth optical waveguide unit 22, and the number of reflections of the dashed line of light in the fourth optical waveguide unit 22 is an odd number of times, for example, it can be selected once, and finally the dashed line of light It is emitted from the fourth optical waveguide unit 22 to reach the image plane O'; the number of reflections of the solid-line light in the second optical waveguide unit 12 is an odd number of times, for example, one can be selected, and then the solid-line light enters the fourth optical waveguide unit 22 In this case, the solid-line light does not reflect through the fourth optical waveguide unit 22 or the number of reflections through the fourth optical waveguide unit 22 is an even number of times.
  • the waveguide unit 22 emits to the image plane O'.
  • the solid line light and the dotted line light have a large overlap in the image plane O'position, so that the solid line light and the dotted line light are both smaller than the original light size. Therefore, the spot size formed at the image plane O'is smaller than the original light size. , Thereby improving the imaging resolution of the optical waveguide unit array 100.
  • the optical waveguide unit array 100 of the embodiment of the present invention by setting the optical waveguide units of the first optical waveguide unit array 1 into the first optical waveguide unit 11 and the second optical waveguide unit 12 with different thicknesses, the second optical waveguide unit array
  • the optical waveguide unit of 2 is arranged as a third optical waveguide unit 21 and a fourth optical waveguide unit 22 with different thicknesses, and the optical waveguides of the first optical waveguide unit array 1 and the optical waveguides of the second optical waveguide unit array 2 are arranged in a staggered manner,
  • the imaging resolution of the optical waveguide unit array 100 can be effectively improved.
  • the first optical waveguide unit array 1 includes a first optical waveguide unit 11, and the first optical waveguide unit 11 of the first optical waveguide unit array 1 is located in all second optical waveguide units.
  • the second optical waveguide unit array 2 includes a third optical waveguide unit 21, and the third optical waveguide unit 21 of the second optical waveguide unit array 2 is located on the same side of all the fourth optical waveguide units 22 ,
  • the first optical waveguide unit 11 and the third optical waveguide unit 21 are respectively located on different sides of the optical waveguide unit array 100.
  • a first optical waveguide unit 11 is located on the lower side of the first optical waveguide unit array 1, and all the second optical waveguide units 12 are located on the upper side of the first optical waveguide unit 11.
  • a third optical waveguide unit 21 is located on the upper side of the second optical waveguide unit array 2
  • all the fourth optical waveguide units 22 are located on the lower side of the third optical waveguide unit 21
  • the waveguide units 21 are respectively located on different sides of the optical waveguide unit array 100, thereby effectively ensuring that the optical waveguides of the first optical waveguide unit array 1 and the optical waveguide units of the second optical waveguide unit array 2 can be arranged in a misaligned manner.
  • the width of the second optical waveguide unit 12 is W A1 , where W A1 satisfies:
  • the width of the fourth optical waveguide unit 22 is W B1 , where W B1 satisfies:
  • ⁇ A1 and ⁇ B1 are the incident angles corresponding to the light
  • n A is the refractive index of the optical waveguide material of the first optical waveguide unit array 1
  • n B is the refractive index of the optical waveguide material of the second optical waveguide unit array 2
  • ⁇ A2 , ⁇ B2 are the refraction angles corresponding to the light
  • d A1 is the thickness of the second optical waveguide unit 12
  • d B1 is the thickness of the fourth optical waveguide unit 22
  • t A is a positive integer
  • t B is 0 or other Positive integer.
  • the thickness of the second optical unit 12 satisfies d A1: 0.1mm ⁇ d A1 ⁇ 10mm
  • the thickness of the fourth light waveguide unit 22 d B1 satisfy: 0.1mm ⁇ d B1 ⁇ 10mm.
  • the optical waveguide unit array can be guaranteed
  • the imaging resolution of 100 can ensure that the size of the optical waveguide unit array 100 can meet the design requirements.
  • the thickness of the first optical waveguide unit 11 is half the thickness of the second optical waveguide unit 12
  • the thickness of the third optical waveguide unit 21 is half the thickness of the fourth optical waveguide unit 22
  • the second The thickness of the optical waveguide unit 12 is equal to the thickness of the fourth optical waveguide unit 22.
  • the thickness of the first optical waveguide unit 11 and the thickness of the third optical waveguide unit 21 is half of the thickness of the second optical waveguide unit 12 and the thickness of the fourth optical waveguide unit 22, respectively .
  • the thickness of the second optical waveguide unit 12 is equal to the thickness of the fourth optical waveguide unit 22, thereby ensuring that the optical waveguide unit in the first optical waveguide unit array 1 and the optical waveguide unit in the second optical waveguide unit array 2 While it can be arranged in a staggered position, the processing of the first optical waveguide unit array 1 and the second optical waveguide unit array 2 is simplified, and the cost can be further reduced.
  • two adjacent optical waveguide units of the first optical waveguide unit array 1 are adhesively connected by a first adhesive layer 3, and the first adhesive layer 3 is embedded with a first particle layer.
  • the first particle layer 31 includes a plurality of first particles 311.
  • the plurality of first particles 311 are uniformly distributed, and the heights of the plurality of first particles 311 are all equal.
  • Two adjacent optical waveguides of the second optical waveguide unit array 2 The units are adhesively connected by the second adhesive layer 4, the second adhesive layer 4 is embedded with a second particle layer 41, the second particle layer 41 includes a plurality of second particles 411, and the plurality of second particles 411 are uniform. And the heights of the plurality of second particles 411 are all equal.
  • the first particle layer 31 of the plurality of first particles 311 is located in the first adhesive layer 3, and the plurality of first particles 311 of the first particle layer 31 are uniformly distributed in the thickness of the optical waveguide unit
  • the shape and size of the first particles 311 may be the same on one side surface in the direction.
  • the second particle layer 41 of the plurality of second particles 411 is located in the second adhesive layer 4, and the plurality of second particles 411 of the second particle layer 41 are uniformly distributed on one side surface in the thickness direction of the optical waveguide unit And the shape and size of the second particles 411 may be equal.
  • the plurality of first particles 311 and the plurality of second particles 411 with uniform distribution and the same height can effectively ensure the gap between the two adjacent optical waveguide units.
  • the uniformity of the distance can ensure the uniformity of the distribution of the first adhesive layer 3 and the second adhesive layer 4, avoid the deformation of the optical waveguide unit array 100 due to the uneven thickness of the traditional adhesive layer, and improve the imaging quality .
  • the height of the particle layer 31 is d gl , where d gl satisfies: d gl ⁇ 0.001 mm.
  • d gl ⁇ 0.001 mm the thickness of the particle layer 31 is small, and the adhesive layer 3 may still have uneven thickness, so that the optical waveguide unit is likely to be deformed. Therefore, by setting d gl to satisfy d gl ⁇ 0.001 mm, the uniformity of the thickness of the adhesive layer 3 can be ensured, and the imaging quality of the optical waveguide unit array 100 can be ensured.
  • the outer contour shape of the first optical waveguide unit array 1 is rectangular, and the extension direction of each optical waveguide unit of the first optical waveguide unit array 1 is the same as the outer contour of the first optical waveguide unit array 1.
  • the angle between at least two sides is ⁇ , where ⁇ satisfies: 40° ⁇ 50°.
  • the outer contour shape of the second optical waveguide unit array 2 is rectangular, and the extension direction of each optical waveguide unit of the second optical waveguide unit array 2 is sandwiched between at least two sides of the outer contour of the second optical waveguide unit array 2 The angle is ⁇ , where ⁇ satisfies: 40° ⁇ 50°.
  • each optical waveguide unit is elongated, and the length of multiple optical waveguide units can be different.
  • multiple optical waveguide units can be arranged at an angle of 45°, so that the first optical waveguide
  • the outer contour shapes of the unit array 1 and the second optical waveguide unit array 2 are rectangular, and the length of the optical waveguide unit between the two opposite corners of the rectangular optical waveguide unit array 100 is the longest.
  • the optical waveguide unit at the other two opposite corners It is triangular and has the shortest length.
  • the optical waveguide unit in the middle has a trapezoidal or parallelogram structure, and the length of a single optical waveguide unit is not equal.
  • the optical waveguide units extending between two diagonal corners of the rectangle are used as a reference, and the optical waveguide units on both sides of the optical waveguide unit may be symmetrically arranged.
  • At least one side in the thickness direction of the first optical waveguide unit 11 or each second optical waveguide unit 12 is provided with a first reflective film (not shown), and the third optical waveguide unit 21
  • at least one side in the thickness direction of each fourth optical waveguide unit 22 is provided with a second reflective film (not shown in the figure).
  • the first reflective film may be provided on one of the two sides in the thickness direction of the first optical waveguide unit 11 or the second optical waveguide unit 12, or may be provided in the thickness direction of the first optical waveguide unit 11 or the second optical waveguide unit 12
  • the first reflective film is provided on both sides of the, and the second reflective film can be provided on one of the two sides in the thickness direction of the third optical waveguide unit 21 or the fourth optical waveguide unit 22, or the third optical waveguide unit 21 Or the second reflection film is provided on both sides in the thickness direction of the fourth optical waveguide unit 22.
  • the first reflective film and the second reflective film can be used as highly smooth optical reflective surfaces, which mainly play the role of reflection and block light. Bubbles, impurities, dust, etc. easily scatter light and generate stray light. The reflective film can prevent this The generation and propagation of light-like rays.
  • the first reflective film is a metal film plated on at least one side in the thickness direction of the first optical waveguide unit 11 or each second optical waveguide unit 12, and the second reflective film is plated.
  • a metal film attached to at least one side in the thickness direction of the third optical waveguide unit 21 or each fourth optical waveguide unit 22.
  • the first optical waveguide unit array 1 and the second optical waveguide unit array 2 are adhesively connected by an adhesive member 5, and the thickness of the adhesive member 5 is D gl , where D gl satisfies: D gl ⁇ 0.001mm.
  • D gl satisfies: D gl ⁇ 0.001mm.
  • the adhesive member 5 is a photosensitive adhesive or a heat-sensitive adhesive, but it is not limited thereto.
  • the photosensitive adhesive has the advantage of fast curing speed, which can improve the production efficiency of the optical waveguide unit array 100.
  • the thermal adhesive has the advantage of good initial adhesion and can effectively ensure the bonding effect between two adjacent optical waveguide units.
  • the optical lens according to the embodiment of the second aspect of the present invention includes two transparent substrates 200 and two optical waveguide unit arrays 100.
  • each transparent substrate 200 has two optical surfaces, two optical waveguide unit arrays 100 are arranged between the two transparent substrates 200, and the extension directions of the optical waveguides of the two optical waveguide unit arrays 100 are arranged orthogonally.
  • the optical waveguide unit array 100 is the optical waveguide unit array 100 according to the embodiment of the first aspect of the present invention.
  • the optical surface of the transparent substrate 200 is used to protect the optical waveguide unit array 100.
  • the two optical waveguide unit arrays 100 can be arranged between the two transparent substrates 200 by glue, and the extension directions of the optical waveguide units of the two optical waveguide unit arrays 100 are arranged orthogonally, that is, the extension directions of the optical waveguide units are perpendicular to each other, Make the light beam converge at one point, and ensure that the object image plane is symmetrical with respect to the equivalent refractive index optical lens, and realize the optical lens imaging.
  • two orthogonally arranged optical waveguide unit arrays 100 are used to improve the imaging resolution of the optical lens and ensure the imaging quality of the optical lens.
  • the optical surface of each transparent substrate 200 away from the optical waveguide unit array 100 is provided with an anti-reflection film. This setting further improves the imaging effect.
  • the optical waveguide unit array 100 and the transparent substrate 200 may be bonded by photosensitive glue or heat-sensitive glue.

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Abstract

一种光波导单元阵列（100）和具有其的光学透镜，光波导单元阵列（100）包括第一光波导单元阵列（1）和第二光波导单元阵列（2），第一光波导单元阵列（1）包括至少一个第一光波导单元（11）和多个第二光波导单元（12），第一光波导单元（11）的厚度小于第二光波导单元（12）的厚度，第二光波导单元阵列（2）包括至少一个第三光波导单元（21）和多个第四光波导单元（22），第三光波导单元（21）的厚度小于第四光波导单元（22）的厚度，第一光波导单元阵列（1）和第二光波导单元阵列（2）的光波导错位设置，以提高光波导单元阵列的成像分辨率。

Description

光波导单元阵列和具有其的光学透镜 技术领域
本发明涉及光学技术领域，尤其是涉及一种光波导单元阵列和具有其的光学透镜。
背景技术
当今世界成像及显示器件种类繁多，各具优势，随着消费者对产品的使用性能要求不断提高，促使各生产厂家产品不断更新换代，制造出性能更为优越的产品以满足消费者需求。
相关技术中，平板透镜为双光波导单元阵列的正交结构，为了提高平板透镜的成像分辨率，通常采用减小光波导单元阵列中每一层光波导单元的厚度来达到目的，然而，该方法通常会极大地增加工艺难度，从而极大地增加了制造成本。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明的一个目的在于提出一种光波导单元阵列，提高成像分辨率，实现高质量成像，降低工艺难度以及成本。
本发明的另一个目的在于提出一种具有上述光波导单元阵列的光学透镜。
根据本发明第一方面实施例的光波导单元阵列，包括：第一光波导单元阵列，所述第一光波导单元阵列包括至少一个第一光波导单元和多个第二光波导单元，所述第一光波导单元的厚度小于所述第二光波导单元的厚度，至少一个所述第一光波导单元和多个所述第二光波导单元在所述第一光波导单元的厚度方向上连接成单排多列结构；第二光波导单元阵列，所述第二光波导单元阵列包括至少一个第三光波导单元和多个第四光波导单元，所述第三光波导单元的厚度小于所述第四光波导单元的厚度，至少一个所述第三光波导单元和多个所述第四光波导单元在所述第三光波导单元的厚度方向上连接成单排多列结构；所述第一光波导单元阵列和所述第二光波导单元阵列在所述光波导单元阵列的厚度方向上彼此相连，所述第一光波导单元阵列的光波导延伸方向平行于所述第二光波导单元阵列的光波导延伸方向，且所述第一光波导单元阵列和所述第二光波导单元阵列的对应的光波导错位设置。
根据本发明实施例的光波导单元阵列，通过将第一光波导单元阵列的光波导单元设置成厚度不同的第一光波导单元和第二光波导单元，第二光波导单元阵列的光波导单元设置 成厚度不同的第三光波导单元和第四光波导单元，且第一光波导单元阵列的光波导与第二光波导单元阵列的光波导呈错位设置，可以有效提高光波导单元阵列的成像分辨率。
根据本发明的一些实施例，所述第一光波导单元阵列包括一个所述第一光波导单元，所述第一光波导单元阵列的所述第一光波导单元位于所有的所述第二光波导单元的同一侧；所述第二光波导单元阵列包括一个所述第三光波导单元，所述第二光波导单元阵列的所述第三光波导单元位于所有的所述第四光波导单元的同一侧，所述第一光波导单元和所述第三光波导单元分别位于所述光波导单元阵列的异侧。
根据本发明的一些实施例，所述第二光波导单元的宽度为W A1，其中，所述W A1满足：
sin(θ A1)＝n A sin(θ A2)
Figure PCTCN2020078371-appb-000001
所述第四光波导单元的宽度为W B1，其中，所述W B1满足：
sin(θ B1)＝n Bsin(θ B2)
Figure PCTCN2020078371-appb-000002
且
W A1≠W B1
其中，θ A1、θ B1分别为光线对应的入射角；n A为所述第一光波导单元阵列的光波导材料的折射率；n B为所述第二光波导单元阵列的光波导材料的折射率；θ A2，θ B2分别为光线对应的折射角，d A1为所述第二光波导单元的厚度；d B1为所述第四光波导单元的厚度，t A为正整数，t B为0或其它正整数。
根据本发明的一些实施例，所述d A1满足：0.1mm≤d A1≤10mm。
根据本发明的一些实施例，所述d B1满足：0.1mm≤d B1≤10mm。
根据本发明的一些实施例，所述第一光波导单元的厚度为所述第二光波导单元的厚度的一半，所述第三光波导单元的厚度为所述第四光波导单元的厚度的一半，所述第二光波导单元的厚度和所述第四光波导单元的厚度相等。
根据本发明的一些实施例，所述第一光波导单元阵列的相邻两个所述光波导单元之间通过第一粘接层粘接连接，所述第一粘接层内嵌设有第一粒子层，所述第一粒子层包括多个粒子，多个所述粒子均匀分布，且多个所述第一粒子的高度均相等；所述第二光波导单元阵列的相邻两个所述光波导单元之间通过第二粘接层粘接连接，所述第二粘接 层内嵌设有第二粒子层，所述第二粒子层包括多个粒子，多个所述粒子均匀分布，且多个所述第二粒子的高度均相等。
根据本发明的一些实施例，所述粒子层的高度为d gl，其中所述d gl满足：d gl≥0.001mm。
根据本发明的一些实施例，所述第一光波导单元阵列的外轮廓形状为矩形，所述第一光波导单元阵列的每个所述光波导单元的延伸方向与所述第一光波导单元阵列的外轮廓的至少两条边之间的夹角为α，其中所述α满足：40°≤α≤50°；所述第二光波导单元阵列的外轮廓形状为矩形，所述第二光波导单元阵列的每个所述光波导单元的延伸方向与所述第二光波导单元阵列的外轮廓的至少两条边之间的夹角为β，其中所述β满足：40°≤β≤50°。
根据本发明的一些实施例，所述第一光波导单元或每个所述第二光波导单元的厚度方向上的至少一侧设有第一反射膜；所述第三光波导单元或每个所述第四光波导单元的厚度方向上的至少一侧设有第二反射膜。
根据本发明的一些实施例，所述第一反射膜为镀附在所述第一光波导单元或每个所述第二光波导单元的厚度方向上的所述至少一侧的金属膜；所述第二反射膜为镀附在所述第三光波导单元或每个所述第四光波导单元的厚度方向上的所述至少一侧的金属膜。
根据本发明的一些实施例，所述第一光波导单元阵列和所述第二光波导单元阵列之间通过粘接件粘接连接，所述粘接件的厚度为D gl，其中所述D gl满足：D gl≥0.001mm。
根据本发明的一些实施例，所述粘接件为光敏胶或热敏胶。
根据本发明第二方面实施例的光学透镜，包括：两个透明基板，每个所述透明基板均具有两个光学面；两个光波导单元阵列，两个所述光波导单元阵列设在两个所述透明基板之间，两个所述光波导单元阵列的光波导延伸方向正交布置，每个所述光波导单元阵列为根据本发明上述第一方面实施例的光波导单元阵列。
根据本发明的一些实施例，每个所述透明基板的远离所述光波导单元阵列的光学面上设有增透膜。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本发明实施例的光波导单元阵列的示意图；
图2是根据本发明实施例的光学透镜的示意图；
图3是图2所示的光学透镜的两个光波导单元阵列的示意图；
图4是根据本发明实施例的光波导单元阵列的第二光波导单元的截面图；
图5是根据本发明实施例的光波导单元阵列的多个光波导单元的排布示意图；
图6是根据本发明实施例的光波导单元阵列减小成像光斑的原理图。
附图标记：
100：光波导单元阵列；
1：第一光波导单元阵列；11：第一光波导单元；12：第二光波导单元；
2：第二光波导单元阵列；21：第三光波导单元；22：第四光波导单元；
3：第一粘接层；31：第一粒子层；311：第一粒子；
4：第二粘接层；41：第二粒子层；411：第二粒子；
5：粘接件；
200：透明基板。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
需要说明的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。进一步地，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
下面详细描述本发明的实施例，参考附图描述的实施例是示例性的，下面详细描述本发明的实施例。
下面参考图1-图6描述根据本发明实施例的光波导单元阵列100。
如图1-图6所示，根据本发明第一方面实施例的光波导单元阵列100，包括：第一光波导单元阵列1和第二光波导单元阵列2。
具体而言，第一光波导单元阵列1包括至少一个第一光波导单元11和多个第二光波导单元12。在本发明的描述中，“多个”的含义是两个或两个以上。第一光波导单元11的厚度小于第二光波导单元12的厚度，至少一个第一光波导单元11和多个第二光波导单元12在第一光波导单元11的厚度方向上连接成单排多列结构。第二光波导单元阵列2包括至少一个第三光波导单元21和多个第四光波导单元22，第三光波导单元21的厚度小于第四光波导单元22的厚度，至少一个第三光波导单元21和多个第四光波导单元22在第三光波导单元21的厚度方向上连接成单排多列结构。第一光波导单元阵列1和第二光波导单元阵列2在光波导单元阵列100的厚度方向上彼此相连，第一光波导单元阵列1的光波导延伸方向平行于第二光波导单元阵列2的光波导延伸方向，且第一光波导单元阵列1和第二光波导单元阵列2的对应的光波导错位设置。
例如，在图1-图6的示例中，第一光波导单元11和第二光波导单元12在第一光波导单元11的厚度方向(例如，图1中的左右方向)上连接，且第一光波导单元11的厚度小于第二光波导单元12的厚度，第三光波导单元21和第四光波导单元22在第三光波导单元21的厚度方向上连接，且第三光波导单元21的厚度小于第四光波导单元22的厚度，第一光波导单元阵列1的光波导延伸方向与第二光波导单元阵列2的光波导延伸方向相互平行，第一光波导单元阵列1的光波导与第二光波导单元阵列2相对应的光波导呈错位设置(如图1所示)，由此，可以保证光线经过第一光波导单元阵列1和第二光波导单元阵列2反射后的重合度，从而保证光线在光波导单元阵列100的像面处形成的光斑尺寸小于原始光斑尺寸，提高光波导单元阵列100的成像分辨率，同时降低了工艺难度，从而可以降低成本。
结合图3和图6，物面O点发射的光线进入第二光波导单元12后被分成两束，即图中所示的虚线光线和实线光线，虚线光线在第二光波导单元12中的反射次数为偶数次，例如可以选两次，之后虚线光线进入第四光波导单元22中，虚线光线在第四光波导单元22中的反射次数为奇数次，例如可以选一次，最后虚线光线从第四光波导单元22发射出到达像面O’处；实线光线在第二光波导单元12中的反射次数为奇数次，例如可以选一次，之后实线光线进入第四光波导单元22中，实线光线不经过第四光波导单元22反射或者经过第四光波导单元22的反射次数为偶数次，例如可以选不经过第四光波导单元22反射，最后实线光线从第四光波导单元22发射出到达像面O’处。实线光 线与虚线光线在像面O’位置的重合度较大，从而实线光线与虚线光线均比为原始光线尺寸小，因此，在像面O’处形成的光斑尺寸比原始光线尺寸小，从而提高光波导单元阵列100的成像分辨率。
根据本发明实施例的光波导单元阵列100，通过将第一光波导单元阵列1的光波导单元设置成厚度不同的第一光波导单元11和第二光波导单元12，第二光波导单元阵列2的光波导单元设置成厚度不同的第三光波导单元21和第四光波导单元22，且第一光波导单元阵列1的光波导与第二光波导单元阵列2的光波导呈错位设置，可以有效提高光波导单元阵列100的成像分辨率。
根据本发明的一些实施例，参照图1和图2，第一光波导单元阵列1包括一个第一光波导单元11，第一光波导单元阵列1的第一光波导单元11位于所有的第二光波导单元12的同一侧，第二光波导单元阵列2包括一个第三光波导单元21，第二光波导单元阵列2的第三光波导单元21位于所有的第四光波导单元22的同一侧，第一光波导单元11和第三光波导单元21分别位于光波导单元阵列100的异侧。
例如，如图1和图2所示，一个第一光波导单元11位于第一光波导单元阵列1的下侧，所有的第二光波导单元12的均位于第一光波导单元11的上侧，一个第三光波导单元21位于第二光波导单元阵列2的上侧，所有的第四光波导单元22位于第三光波导单元21的下侧，且第一光波导单元11和第三光波导单元21分别位于光波导单元阵列100的异侧，由此，可以有效保证第一光波导单元阵列1的光波导与第二光波导单元阵列2的光波导单元可以呈错位设置。
根据本发明的一些实施例，在第一光波导单元阵列1中，第二光波导单元12的宽度为W A1，其中，W A1满足：
sin(θ A1)＝n A sin(θ A2)，
Figure PCTCN2020078371-appb-000003
第二光波导单元阵列2中，第四光波导单元22的宽度为W B1，其中，W B1满足：
sin(θ B1)＝n Bsin(θ B2)，
Figure PCTCN2020078371-appb-000004
且
W A1≠W B1，
其中，θ A1、θ B1分别为光线对应的入射角，n A为第一光波导单元阵列1的光波导材料的折射率，n B为第二光波导单元阵列2的光波导材料的折射率，θ A2，θ B2分别为光线对应的折射角，d A1为第二光波导单元12的厚度，d B1为第四光波导单元22的厚度，t A为正整数，t B为0或其它正整数。如此设置，可以保证第二光波导单元12的宽度不等于第四光波导单元22的宽度，进而可以对光线进行有效地调制。
进一步地，第二光波导单元12的厚度d A1满足：0.1mm≤d A1≤10mm，第四光波导单元22的厚度d B1满足：0.1mm≤d B1≤10mm。当d A1＜0.1mm或者d B1＜0.1mm时，虽然可以增加光波导单元阵列100的成像分辨率，但不容易将光波导单元阵列100做大，使光波导单元阵列100达不到设计要求，当d A1＞10mm或者d B1＞10mm时，降低了光波导单元阵列100的成像分辨率。由此，当第二光波导单元12的厚度d A1满足0.1mm≤d A1≤10mm，第四光波导单元22的厚度d B1满足0.1mm≤d B1≤10mm时，既能保证光波导单元阵列100的成像分辨率，又可以保证光波导单元阵列100的尺寸能够达到设计要求。
根据本发明的一些实施例，第一光波导单元11的厚度为第二光波导单元12的厚度的一半，第三光波导单元21的厚度为第四光波导单元22的厚度的一半，第二光波导单元12的厚度和第四光波导单元22的厚度相等。如图1和图2所示，通过将第一光波导单元11的厚度和第三光波导单元21的厚度分别设置为第二光波导单元12的厚度和第四光波导单元22的厚度的一半，且第二光波导单元12的厚度等于第四光波导单元22的厚度，由此，在保证第一光波导单元阵列1中的光波导单元与第二光波导单元阵列2中的光波导单元能够呈错位设置的同时，简化了第一光波导单元阵列1和第二光波导单元阵列2的加工，可以进一步降低成本。
根据本发明的一些实施例，第一光波导单元阵列1的相邻两个光波导单元之间通过第一粘接层3粘接连接，第一粘接层3内嵌设有第一粒子层31，第一粒子层31包括多个第一粒子311，多个第一粒子311均匀分布，且多个第一粒子311的高度均相等，第二光波导单元阵列2的相邻两个光波导单元之间通过第二粘接层4粘接连接，第二粘接层4内嵌设有第二粒子层41，第二粒子层41包括多个第二粒子411，多个第二粒子411均匀分布，且多个第二粒子411的高度均相等。参照图1和图2，多个第一粒子311的第一粒子层31位于在第一粘接层3内，且第一粒子层31的多个第一粒子311均匀分布在光波导单元的厚度方向上的一侧表面内，且第一粒子311的形状、大小可以均相等。多个第二粒子411的第二粒子层41位于在第二粘接层4内，且第二粒子层41的多个第二粒子411均匀分布在光波导单元的厚度方向上的一侧表面内，且第二粒子411的形状、大小可以均相等。由此，通过设置上述的第一粒子层31和第二粒子层41，均匀分布且 高度相等的多个第一粒子311和多个第二粒子411可以有效保证相邻两个光波导单元之间距离的均匀性，从而可以保证第一粘接层3和第二粘接层4分布的均匀性，避免了传统的粘接层由于厚度不均引起光波导单元阵列100的变形，提高了成像质量。
进一步地，粒子层31的高度为d gl，其中d gl满足：d gl≥0.001mm。当d gl＜0.001mm时，粒子层31的厚度较小，粘接层3可能仍然存在厚度不均的情况，从而光波导单元容易产生变形。由此，通过设置使d gl满足d gl≥0.001mm，既能保证粘接层3厚度的均匀性，又能保证光波导单元阵列100的成像质量。
根据本发明的一些实施例，第一光波导单元阵列1的外轮廓形状为矩形，第一光波导单元阵列1的每个光波导单元的延伸方向与第一光波导单元阵列1的外轮廓的至少两条边之间的夹角为α，其中α满足：40°≤α≤50°。第二光波导单元阵列2的外轮廓形状为矩形，第二光波导单元阵列2的每个光波导单元的延伸方向与第二光波导单元阵列2的外轮廓的至少两条边之间的夹角为β，其中β满足：40°≤β≤50°。如图2-图4所示，每个光波导单元为长条状，多个光波导单元的长度可以不同，例如，可以多个光波导单元沿斜45°排布，从而使得第一光波导单元阵列1和第二光波导单元阵列2外轮廓形状为矩形，矩形的光波导单元阵列100的其中两个对角之间的光波导单元的长度最长另外两个对角处的光波导单元为三角形且长度最短。中间的光波导单元为梯形或平行四边形结构，单个光波导单元的长度不相等。在一些进一步可选的实施例中，延伸在矩形两个对角之间的光波导单元为基准，位于其两侧的光波导单元可以对称设置。
根据本发明的一些实施例，第一光波导单元11或每个第二光波导单元12的厚度方向上的至少一侧设有第一反射膜(图未示出)，第三光波导单元21或每个第四光波导单元22的厚度方向上的至少一侧设有第二反射膜(图未示出)。第一反射膜可以设置在第一光波导单元11或者第二光波导单元12的厚度方向上两侧的其中一侧，也可以第一光波导单元11或者第二光波导单元12的厚度方向上的两侧均设有第一反射膜，第二反射膜可以设置在第三光波导单元21或者第四光波导单元22的厚度方向上两侧的其中一侧，也可以第三光波导单元21或者第四光波导单元22的厚度方向上的两侧均设有第二反射膜。第一反射膜和第二反射膜可以作为光洁度很高的光学反射面，主要起到反射作用和阻隔光线作用，由于气泡、杂质、灰尘等容易使得光线散射产生杂光，通过反射膜可以阻止该类光线的产生和传播。
在一些可选的实施例中，第一反射膜为镀附在第一光波导单元11或每个第二光波导单元12的厚度方向上的至少一侧的金属膜，第二反射膜为镀附在第三光波导单元21或每个第四光波导单元22的厚度方向上的至少一侧的金属膜。如此设置，结构简单， 降低成本。可选地，金属膜可以为铝膜。
根据本发明的一些实施例，第一光波导单元阵列1和第二光波导单元阵列2之间通过粘接件5粘接连接，粘接件5的厚度为D gl，其中D gl满足：D gl≥0.001mm。当D gl满足D gl≥0.001mm时，能够有效地保证第一光波导单元阵列1和第二光波导单元阵列2之间的粘接强度。
在一些可选的实施例中，粘接件5为光敏胶或热敏胶,但不限于此。光敏胶具有固化速度快的优点，能提高光波导单元阵列100的生产效率。热敏胶具有初粘性好的优点，能够有效保证相邻两个光波导单元之间的粘接效果。
如图2所示，根据本发明第二方面实施例的光学透镜，包括两个透明基板200和两个光波导单元阵列100。
具体而言，每个透明基板200均具有两个光学面，两个光波导单元阵列100设在两个透明基板200之间，两个光波导单元阵列100的光波导延伸方向正交布置，每个光波导单元阵列100为根据本发明上述第一方面实施例的光波导单元阵列100。
例如，在图2的示例中，透明基板200的光学面用于保护光波导单元阵列100。两个光波导单元阵列100可以通过粘胶设置在两个透明基板200之间，且两个光波导单元阵列100的光波导单元的延伸方向正交布置，即光波导单元的延伸方向相互垂直，使得光束会聚于一点，且保证物像面相对于等效折射率光学透镜对称，实现光学透镜成像。
根据本发明实施例的光学透镜，采用两个正交布置的光波导单元阵列100，提高光学透镜的成像分辨率，保证了光学透镜的成像质量。
在一些可选的实施例中，每个透明基板200的远离光波导单元阵列100的光学面上设有增透膜。如此设置，进一步提高成像效果。
可选地，在光波导单元阵列100和透明基板200之间可以通过光敏胶或热敏胶进行贴合。
根据本发明实施例的光学透镜的其他构成以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本 发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (15)

  1. 一种光波导单元阵列，其特征在于，包括：
    第一光波导单元阵列，所述第一光波导单元阵列包括至少一个第一光波导单元和多个第二光波导单元，所述第一光波导单元的厚度小于所述第二光波导单元的厚度，至少一个所述第一光波导单元和多个所述第二光波导单元在所述第一光波导单元的厚度方向上连接成单排多列结构；
    第二光波导单元阵列，所述第二光波导单元阵列包括至少一个第三光波导单元和多个第四光波导单元，所述第三光波导单元的厚度小于所述第四光波导单元的厚度，至少一个所述第三光波导单元和多个所述第四光波导单元在所述第三光波导单元的厚度方向上连接成单排多列结构；
    所述第一光波导单元阵列和所述第二光波导单元阵列在所述光波导单元阵列的厚度方向上彼此相连，所述第一光波导单元阵列的光波导延伸方向平行于所述第二光波导单元阵列的光波导延伸方向，且所述第一光波导单元阵列和所述第二光波导单元阵列的对应的光波导错位设置。
  2. 根据权利要求1所述的光波导单元阵列，其特征在于，所述第一光波导单元阵列包括一个所述第一光波导单元，所述第一光波导单元阵列的所述第一光波导单元位于所有的所述第二光波导单元的同一侧；
    所述第二光波导单元阵列包括一个所述第三光波导单元，所述第二光波导单元阵列的所述第三光波导单元位于所有的所述第四光波导单元的同一侧，所述第一光波导单元和所述第三光波导单元分别位于所述光波导单元阵列的异侧。
  3. 根据权利要求1或2所述的光波导单元阵列，其特征在于，所述第二光波导单元的宽度为WA1，其中，所述WA1满足：
    sin(θ A1)＝n Asin(θ A2)
    Figure PCTCN2020078371-appb-100001
    所述第四光波导单元的宽度为W B1，其中，所述W B1满足：
    sin(θ B1)＝n Bsin(θ B2)
    Figure PCTCN2020078371-appb-100002
    且
    W A1≠W B1
    其中，θ A1、θ B1分别为光线对应的入射角；n A为所述第一光波导单元阵列的光波导材料的折射率；n B为所述第二光波导单元阵列的光波导材料的折射率；θ A2，θ B2分别为光线对应的折射角，d A1为所述第二光波导单元的厚度；d B1为所述第四光波导单元的厚度，t A为正整数，t B为0或其它正整数。
  4. 根据权利要求3所述的光波导单元阵列，其特征在于，所述d A1满足：0.1mm≤d A1≤10mm。
  5. 根据权利要求3所述的光波导单元阵列，其特征在于，所述d B1满足：0.1mm≤d B1≤10mm。
  6. 根据权利要求1或2所述的光波导单元阵列，其特征在于，所述第一光波导单元的厚度为所述第二光波导单元的厚度的一半，所述第三光波导单元的厚度为所述第四光波导单元的厚度的一半，所述第二光波导单元的厚度和所述第四光波导单元的厚度相等。
  7. 根据权利要求1或2所述的光波导单元阵列，其特征在于，所述第一光波导单元阵列的相邻两个所述光波导单元之间通过第一粘接层粘接连接，所述第一粘接层内嵌设有第一粒子层，所述第一粒子层包括多个粒子，多个所述第一粒子均匀分布，且多个所述第一粒子的高度均相等；
    所述第二光波导单元阵列的相邻两个所述光波导单元之间通过第二粘接层粘接连接，所述第二粘接层内嵌设有第二粒子层，所述第二粒子层包括多个第二粒子，多个所述第二粒子均匀分布，且多个所述第二粒子的高度均相等。
  8. 根据权利要求7所述的光波导单元阵列，其特征在于，所述粒子层的高度为d gl，其中所述d gl满足：d gl≥0.001mm。
  9. 根据权利要求1或2所述的光波导单元阵列，其特征在于，所述第一光波导单元阵列的外轮廓形状为矩形，所述第一光波导单元阵列的每个所述光波导单元的延伸方向与所述第一光波导单元阵列的外轮廓的至少两条边之间的夹角为α，其中所述α满足：40°≤α≤50°；
    所述第二光波导单元阵列的每个所述光波导单元的延伸方向与所述第二光波导单元阵列的外轮廓的至少两条边之间的夹角为β，其中所述β满足：40°≤β≤50°。
  10. 根据权利要求1或2所述的光波导单元阵列，其特征在于，所述第一光波导单元或每个所述第二光波导单元的厚度方向上的至少一侧设有第一反射膜；
    所述第三光波导单元或每个所述第四光波导单元的厚度方向上的至少一侧设有第二反射膜。
  11. 根据权利要求10所述的光波导单元阵列，其特征在于，所述第一反射膜为镀附在所述第一光波导单元或每个所述第二光波导单元的厚度方向上的所述至少一侧的金属膜；
    所述第二反射膜为镀附在所述第三光波导单元或每个所述第四光波导单元的厚度方向上的所述至少一侧的金属膜。
  12. 根据权利要求1或2所述的光波导单元阵列，其特征在于，所述第一光波导单元阵列和所述第二光波导单元阵列之间通过粘接件粘接连接，所述粘接件的厚度为D gl，其中所述D gl满足：D gl≥0.001mm。
  13. 根据权利要求12所述的光波导单元阵列，其特征在于，所述粘接件为光敏胶或热敏胶。
  14. 一种光学透镜，其特征在于，包括：
    两个透明基板，每个所述透明基板均具有两个光学面；
    两个光波导单元阵列，两个所述光波导单元阵列设在两个所述透明基板之间，两个所述光波导单元阵列的光波导延伸方向正交布置，每个所述光波导单元阵列为根据权利要求1-13中任一项所述的光波导单元阵列。
  15. 根据权利要求14所述的光学透镜，其特征在于，每个所述透明基板的远离所述光波导单元阵列的光学面上设有增透膜。
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JP5047403B1 (ja) * 2011-10-24 2012-10-10 株式会社アスカネット 光学結像装置
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JP5047403B1 (ja) * 2011-10-24 2012-10-10 株式会社アスカネット 光学結像装置
US20180045972A1 (en) * 2016-08-15 2018-02-15 Hon Hai Precision Industry Co., Ltd. Aerial display and image forming system having the same
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