110 °C range athermalization of wavefront coding infrared imaging systems

Feng, Bin; Shi, Zelin; Chang, Zheng; Liu, Haizheng; Zhao, Yang

doi:10.1016/j.infrared.2017.05.020

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…Comb function can be expressed as where k x and k y are integers. Accordingly For a convenient discussion, in equation (7), we define the following formula…”

Section: Msd X Y Opt X Y X X Y Y X X Y Y X X X Y Y Ymentioning

confidence: 99%

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Effect of point spread function position bias in wavefront coding infrared imaging system

Feng

Shi

Liu

et al. 2020

J. Opt.

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By an experimental finding, for a given radiant point source and a given infrared detector sampling, an optical point spread function (PSF) falling on different positions of an infrared detector focal plane array, will result in different measured PSFs. Those measured PSFs known as decoding kernels will further produce different decoded images. Therefore, this work explores the effect of PSF position bias on decoded images in a wavefront coding infrared imaging system. This paper theoretically analyzes the effect of PSF position bias on decoded images. A simulation is conducted for qualitatively evaluating the effect of PSF position bias on decoded images by mean structural similarity (MSSIM) index. Simulated results prove that the probability for MSSIM index greater than 0.75 is 91.38%, and that for less than 0.5 is only 1.22% but this minority seriously degrades the decoded images. We construct an experimental setup for capturing the raw PSF image at a random position and proposes a procedure to reduce the noise of a raw PSF image. The experimental result demonstrates the feasibility for measuring a PSF to achieve a decoded image with good quality.

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“…Comb function can be expressed as where k x and k y are integers. Accordingly For a convenient discussion, in equation (7), we define the following formula…”

Section: Msd X Y Opt X Y X X Y Y X X Y Y X X X Y Y Ymentioning

confidence: 99%

“…Wavefront coding infrared imaging technique through two stages of optical coding and digital decoding, greatly relaxes requirements for an infrared optical system. Wavefront coding infrared imaging technique significantly widens the operating temperature range [7,8] and has many advantages in size, weight and stability [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of point spread function position bias in wavefront coding infrared imaging system

Feng

Shi

Liu

et al. 2020

J. Opt.

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are many forms of optical phase surfaces. The cubic phase surface is previously applied to our medium-FoV WC-AIIS and this cubic phase surface achieves good quality [13][14][15]. Therefore, this paper still takes the cubic surface as the preferred solution.…”

Section: Designmentioning

confidence: 99%

“…During the manufacturing process, more attention is paid to avoid tilt and decenter between the aspheric surface and the cubic surface. Compared with the previous optical masks [13,14], this manufactured optical mask further reduces the weight and cost and meanwhile increases the transmission efficiency.…”

Section: Manufacture and Assemblymentioning

confidence: 99%