Infrared and Laser Engineering, Volume. 49, Issue 7, 20190548(2020)
Infrared light field relay imaging system based on micro field lens array
Figures & Tables(10)
Fig. 2. Biplane parametric representation of four-dimensional light field
Fig. 4. Contrast diagram of relay lens vignetting. (a) Without micro field lens array; (b) with micro field lens array
Fig. 6. MTF curves for the three coupled structures. (a)
Table 1. Designed relay lens parameters
View tableView in ArticleTable 1. Designed relay lens parameters
Relay lens Magnification NA Field of view/mm Design parameters 1 0.25 36.2
Table 2. Designed micro field lens array parameters
View tableView in ArticleTable 2. Designed micro field lens array parameters
Microlens array Microlens aperture/μm Focal length/μm Array number Design parameters 225 450 113×113
Table 3. Designed light field camera parameters
View tableView in ArticleTable 3. Designed light field camera parameters
Main lens Microlens array Sensor Aperture/mm Focal length/mm Aperture/μm Focal length/μm Array number Pixel size/μm Pixel numbers 40 80 225 450 113×113 25 1 024×1 024
Table 4. Curve value at Nyquist frequency of three structures with different α
View tableView in ArticleTable 4. Curve value at Nyquist frequency of three structures with different α
Three kinds of structure α =1.058α =1.014α =1α =0.989α =0.973Direct coupling 0.06 0.39 0.60 0.39 0.40 With micro field lens Cutoff 0.38 0.59 0.34 0.35 Without micro field lens Cutoff 0.32 0.56 0.10 Cutoff
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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
Paper Information
Category: 红外技术及应用
Received: Apr. 10, 2020
Accepted: --
Published Online: Aug. 19, 2020
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