Resolution enhancement in nonlinear interferenceless COACH with point response of subdiffraction limit patterns | Zendy

Mani Ratnam | Zendy; Vijayakumar Anand | Zendy; Yusuke Ogura | Zendy; Joseph Rosen | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Resolution enhancement in nonlinear interferenceless COACH with point response of subdiffraction limit patterns

Author(s) -

Mani Ratnam,

Vijayakumar Anand,

Yusuke Ogura,

Joseph Rosen

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.000391

Subject(s) - optics , holography , digital holography , point spread function , aperture (computer memory) , numerical aperture , image resolution , physics , point (geometry) , resolution (logic) , spatial frequency , computer science , artificial intelligence , acoustics , mathematics , wavelength , geometry

Interferenceless coded aperture correlation holography (I-COACH) is a non-scanning, motionless, incoherent digital holography technique for 3D imaging. The lateral and axial resolutions of I-COACH are equivalent to those of conventional direct imaging with the same numerical aperture. The main component of I-COACH is a coded phase mask (CPM) used as the system aperture. In this study, the CPM has been engineered using a modified Gerchberg-Saxton algorithm to generate a random distribution of subdiffraction spot arrays on the digital camera as a system response to a point source illumination. A library of point object holograms is created to calibrate the system for imaging different lateral sections of a 3D object. An object is placed within the calibrated 3D space and an object hologram is recorded with the same CPM. The various planes of the object are reconstructed by a non-linear cross-correlation between the object hologram and the point object hologram library. A lateral resolution enhancement of about 25% was noted in the case of I-COACH compared to direct imaging.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research