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手机嵌入式快照成像光谱仪的研制

田久谊

田久谊. 手机嵌入式快照成像光谱仪的研制[J]. 中国光学(中英文), 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]. 中国光学(中英文), 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 3  3×4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  1  CMOS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 CMOS760(H)×586(V)4.8 mm×3.6 mm0.008 LxPAL/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
    1470~62012~10~85介质高反/二氧化硅/介质高反[27]
    2722~8801281.72~3.84~45%介质高反/二氧化硅/介质高反[26]
    3415~7258~81~68.9Ag高反/ 光刻胶 /Ag高反[14]
    4400~8005~100~45Al 超表面[28]
    5460~6309~2771.2Ag高反/ 光刻胶 /Ag高反[14]
    6530~68012~883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)
    NOV61300 cps1.5638%1500003000
    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 nm700 mW/cm230 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
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