Infrared and Laser Engineering, Volume. 49, Issue 7, 20190548(2020)

Infrared light field relay imaging system based on micro field lens array

Tengfei Wang, Yonghe Chen, and Yutian Fu
Author Affiliations
  • 中国科学院红外探测与成像技术重点实验室,上海 200083
  • show less

    Light field imaging is a method of imaging by acquiring light field information and refocusing on a specific plane. With the limitation of the light field camera structure, the detector is generally modified to achieve coupling of the microlens array and the detector. It is not applicable to infrared light field cameras. To this end, a novel structure of a micro field lens array combined with a relay lens was proposed. This new structure utilized a relay lens to image the intermediate image plane at a 1:1 ratio and eliminated the vignetting of the relay lens through the micro field lens array. The modulation transfer function curve of the system was calculated by the slanted edge method. The image quality of direct coupling, relay lens coupling and new structure coupling were compared. According to different refocus planes, the curve value of the new coupling structure at Nyquist frequency was increased by 5%-240% compared with that of the relay lens coupling structure. It was close to the curve value of the direct coupling structure. The new structure can realize coupling and avoid the sharp decrease of system image quality. It plays an important role in the infrared field camera.

    Tools

    Get Citation

    Copy Citation Text

    Tengfei Wang, Yonghe Chen, Yutian Fu. Infrared light field relay imaging system based on micro field lens array[J]. Infrared and Laser Engineering, 2020, 49(7): 20190548

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: 红外技术及应用

    Received: Apr. 10, 2020

    Accepted: --

    Published Online: Aug. 19, 2020

    The Author Email:

    DOI:10.3788/IRLA20190548

    Topics