Compressive Photon-Sieve Spectral Imaging

Kar, Oguzhan Fatih
Kamaci, Ulas
Akyon, Fatih
Öktem, Sevinç Figen
We develop a new compressive spectral imaging modality that utilizes a coded aperture and a photon-sieve for dispersion. The 3D spectral data cube is successfully reconstructed with as little as two shots using sparse recovery


Compressive spectral imaging using diffractive lenses and multi-spectral sensors with learned reconstruction and joint optimization
Gündoğan, Utku; Öktem, Sevinç Figen; Department of Electrical and Electronics Engineering (2022-2)
Compressive spectral imaging aims to reconstruct the entire three-dimensional spectral cube from a few measurements, ideally with a snapshot capability. Recently various spectral imaging modalities have been developed by exploiting diffractive lenses. Another line of development in this area is enabled by spectral filter arrays which resulted in multi-spectral sensors. In this thesis, we first review an existing compressive spectral imaging modality with diffractive lenses and analyze its performance using ...
A Parametric Estimation Approach to Instantaneous Spectral Imaging
Öktem, Sevinç Figen; Davila, Joseph M (2014-12-01)
Spectral imaging, the simultaneous imaging and spectroscopy of a radiating scene, is a fundamental diagnostic technique in the physical sciences with widespread application. Due to the intrinsic limitation of two-dimensional (2D) detectors in capturing inherently three-dimensional (3D) data, spectral imaging techniques conventionally rely on a spatial or spectral scanning process, which renders them unsuitable for dynamic scenes. In this paper, we present a nonscanning (instantaneous) spectral imaging techn...
Fast Computational Spectral Imaging with a Programmable Diffractive Lens
Kar, Oğuzhan Fatih; Öktem, Sevinç Figen (2019-06-24)
We develop a fast computational spectral imaging modality that utilizes a single programmable diffractive lens. The proposed optical configuration is simple and provides promising reconstruction performance for the three-dimensional spectral data cube.
Anlık Spektral Görüntüleme için Tasarım Eniyileme
Ayazgök, Suleyman; Öktem, Sevinç Figen (2019-08-22)
Snapshot spectral imaging enables to reconstructspectral images from a multiplexed single-shot measurement.Since an inversion is required to form the spectral images com-putationally, quantitative characterization of their performanceis essential to optimize the design. In this paper, we analyze theoptimal design of a snapshot spectral imaging technique. Thissnapshot multi-spectral imaging technique uses a diffractive lenscalled generalized photon sieve, and vari...
Periodic aperture imaging
Alici, Kamil B.; Buyuk, Hakan; Yilmaz, A. Serdar; Ozdemir, Ceyda; Karci, Ozgur; Öktem, Sevinç Figen; Selimoglu, Ozgur (SPIE-Intl Soc Optical Eng, 2017-5-16)
We studied periodic aperture imaging with various subaperture configurations in terms of their point spread functions, optical transfer functions, and imaging quality. A circular-shaped unit cell provides the best performance compared to square- and cross-shaped unit cells when the total aperture size and collection area are kept the same. Moreover, decreasing the separation among the unit cells or the number of subapertures also improve the imaging performance. Results have potential applications in optica...
Citation Formats
O. F. Kar, U. Kamaci, F. Akyon, and S. F. Öktem, “Compressive Photon-Sieve Spectral Imaging,” 2018, Accessed: 00, 2020. [Online]. Available: