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手机嵌入式快照成像光谱仪的研制

田久谊

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田久谊. 手机嵌入式快照成像光谱仪的研制[J]. , 2022, 15(4): 770-779. doi: 10.37188/CO.2021-0209
引用本文: 田久谊. 手机嵌入式快照成像光谱仪的研制[J]. , 2022, 15(4): 770-779.doi:10.37188/CO.2021-0209
TIAN Jiu-yi. Snapshot imaging spectrometer for mobile phone[J]. Chinese Optics, 2022, 15(4): 770-779. doi: 10.37188/CO.2021-0209
Citation: TIAN Jiu-yi. Snapshot imaging spectrometer for mobile phone[J].Chinese Optics, 2022, 15(4): 770-779.doi:10.37188/CO.2021-0209

手机嵌入式快照成像光谱仪的研制

doi:10.37188/CO.2021-0209
基金项目:陕西省重点研发计划(产业创新链项目)(No. 2021ZDLGY12-05)
详细信息
    作者简介:

    田久谊(1979—),女,陕西西安人,学士,工程师,2001年于西安工业大学获得学士学位,主要从事多光谱成像、光电探测器件等方面的应用光学仪器研究。E-mail:jiuyi_tian@163.com

  • 中图分类号:O439

Snapshot imaging spectrometer for mobile phone

Funds:Supported by Key R&D Plan of Shaanxi Province (Industrial Innovation Chain Project) (No. 2021ZDLGY12-05)
More Information
  • 摘要:

    目前手机摄像头已经具备在空间( x - y 方向)和深度( z 方向)维度上获取成像信息的能力,而在光谱维度的信息获取上一直停留在RGB三色上,受困于手机平台的尺寸限制,传统的成像光谱仪很难嵌入。本文基于多通道阵列滤光片、微透镜阵列成像和一体化集成制造技术,完成了系统整体设计、关键部件设计制造、整体装配,并实验验证了光谱成像。系统整体物理尺寸小于Φ6×6 mm,光谱分辨率为8 nm,光谱范围为0.53~0.68 μm。实验研究表明,对不同颜色的实物成像,可以获得物体任意部位的光谱曲线,验证了快照式光谱仪的设计指标。该光谱仪具备了嵌入手机的基本条件,此研究有望推动成像光谱仪在手机上集成应用。

  • 图 1阵列滤光片的光谱成像系统的基本结构

    Figure 1.Basic structure of the spectral imaging system of an array filter

    图 2阵列滤光片组件设计方法

    Figure 2.Design method of the array filter assembly

    图 33×4通道滤光片理论透过率

    Figure 3.Theoretical transmittance of 3×4 channel filter

    图 4阵列滤光片的工艺路线

    Figure 4.Process route of an array filter

    图 5测试的12通道的光谱透过曲线

    Figure 5.Spectral transmission test curve for the 3×4 channels

    图 6微透镜阵列设计结果。(a)光线模拟图,单位mm;(b)3×4阵列透镜的空间位置关系;(c)模拟3×4 阵列像;(d)MTF曲线

    Figure 6.Design results of the microlens array. (a) Simulation diagram of light tracing; (b) spatial position relationship of the 3×4 array lens; (c) simulated 3×4 array images; (d) MTF curves

    图 7微透镜加工效果图。(a)表面形貌;(b)轮廓曲线

    Figure 7.Processing effect of microlens. (a) Surface morphology; (b) contour curve

    图 8(a)装配前及(b)装配后的快照式光谱相机

    Figure 8.Snapshot spectral camera (a) before assembly and (b) after assembly

    图 9实验测试结果。(a)光学布局;(b)绿色、(c)白色、(d)红色、(e)蓝色物体的光谱像

    Figure 9.Experimental test results. (a) Optical layout; spectral images of a (b) blue, (c) white, (d) red and (e) blue object

    图 10图9(b)所标点的光谱曲线(实线:微光纤光谱仪测试结果,虚线:成像光谱仪测试结果)

    Figure 10.Spectral curve marked in Fig. 9 (b) (solid line: micro fiber spectrometer test results, dotted line: imaging spectrometer test results)

    表 1CMOS的基本参数指标

    Table 1.Basic parameters and indicators of CMOS

    芯片型号 有效像素 图像区域 最低照度 视频制式
    1/3 CMOS 760(H)×586(V) 4.8 mm×3.6 mm 0.008 Lx PAL/NTSC
    下载: 导出CSV

    表 2滤光片性能对比

    Table 2.Performance comparison of the filters

    序号 光谱范围/nm 通道个数 半高宽/nm 平均峰值透过率/% 主要结构 参考文献
    1 470~620 12 ~10 ~85 介质高反/二氧化硅/介质高反 [27]
    2 722~880 128 1.72~3.84 ~45% 介质高反/二氧化硅/介质高反 [26]
    3 415~725 8 ~81 ~68.9 Ag高反/ 光刻胶 /Ag高反 [14]
    4 400~800 5 ~100 ~45 Al 超表面 [28]
    5 460~630 9 ~27 71.2 Ag高反/ 光刻胶 /Ag高反 [14]
    6 530~680 12 ~8 83 介质高反/二氧化硅/介质高反 本工作
    下载: 导出CSV

    表 3紫外胶合剂参数

    Table 3.Parameters of the UV adhesive

    名称 粘度
    25 °C
    固化后
    折射率
    拉伸极限 弹性模量(PSI) 抗拉强度(PSI)
    NOV61 300 cps 1.56 38% 150000 3000
    下载: 导出CSV

    表 4胶合基本工艺和参数

    Table 4.Basic gluing process and parameters

    光源波长 光功率密度 预固化时间 固化时间 点胶设备
    365 nm 700 mW/cm2 30 s >10 min 尔谷光电(JZ04-365-04)
    下载: 导出CSV

    表 5成像光谱仪技术指标对比

    Table 5.Comparison of technical indexes of the imaging spectrometer

    序号 结构 光谱分辨率/nm 时间分辨率 整体尺寸/mm 光谱图像获取方式 报道时间/年 参考文献
    1 芯片滤光阵列 10 和CMOS芯片同步 11.2×11.2,不带镜头 直接获取 2014 [27]
    2 子孔径复合阵列滤光片 10 计算重构 原理样机平台搭建 计算重建 2019 [31]
    3 子孔径复合阵列滤光片 50 计算重构 原理样机平台搭建 计算重建 2004 [32]
    4 芯片滤光阵列 10 和CMOS芯片同步 实物样机
    约几十mm
    直接获取 2019 [33]
    5 傅立叶变换成像光谱仪 / / 原理设计 计算重构 2020 [8]
    6 芯片滤光阵列 计算超分后5.2 nm 计算重构 原理样机平台搭建 计算重构 2021 [22]
    7 子孔径复合阵列滤光片 8 和CMOS芯片同步 功能样机Φ6×6 直接获取 2022 本工作
    下载: 导出CSV
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  • 收稿日期:2021-12-06
  • 修回日期:2022-01-10
  • 网络出版日期:2022-05-12

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