Diffractive Optics With Incoherent Optical Systems

1988 ◽  
Author(s):  
Hsuan Chen ◽  
Robert R. Hershey ◽  
Emmett N. Leith
Keyword(s):  
Diffractive Optics ◽  
Optical Systems

Optical systems for large-aperture phased laser array including diffractive optics

2019 ◽  
Author(s):  
Jacob Erlikhman ◽  
Peter Krogen ◽  
Prashant Srinivasan ◽  
Will Hettel ◽  
Peter Meinhold ◽  
...  
Keyword(s):  
Diffractive Optics ◽  
Optical Systems ◽  
Laser Array ◽  
Large Aperture

scholarly journals A review of dielectric optical metasurfaces for wavefront control

Nanophotonics ◽  
2018 ◽  
Vol 7 (6) ◽  
pp. 1041-1068 ◽  
Author(s):  
Seyedeh Mahsa Kamali ◽  
Ehsan Arbabi ◽  
Amir Arbabi ◽  
Andrei Faraon
Keyword(s):  
High Efficiency ◽  
Chromatic Dispersion ◽  
Phase Control ◽  
Diffractive Optics ◽  
Optical Systems ◽  
Optical Elements ◽  
Wavefront Control ◽  
The Past ◽  
Recent Developments ◽  
Dielectric Structures

AbstractDuring the past few years, metasurfaces have been used to demonstrate optical elements and systems with capabilities that surpass those of conventional diffractive optics. Here, we review some of these recent developments, with a focus on dielectric structures for shaping optical wavefronts. We discuss the mechanisms for achieving steep phase gradients with high efficiency, simultaneous polarization and phase control, controlling the chromatic dispersion, and controlling the angular response. Then, we review applications in imaging, conformal optics, tunable devices, and optical systems. We conclude with an outlook on future potentials and challenges that need to be overcome.

scholarly journals Laser printed flat lenses for optofluidics

2019 ◽  
Vol 215 ◽  
pp. 13002
Author(s):  
Airidas Žukauskas ◽  
Andreas R. Stilling-Andersen ◽  
Xiaolong Zhu ◽  
Anders Kristensen
Keyword(s):  
Wave Front ◽  
Three Dimensional ◽  
Diffractive Optics ◽  
Imaging Systems ◽  
Optical Systems ◽  
Optical Aberrations ◽  
Optical Elements ◽  
Printing Technique ◽  
Resonant Laser ◽  
Bio Imaging

Conventional three-dimensional optics requires curvature to control the wave front of light thus making it difficult to reduce the size of the optical systems. Furthermore, for correction of optical aberrations, complex optical systems comprising more than one lens are used. This adds additional bulk, mass and complexity to the optical systems. Recent development in diffractive optics has enabled new thin lightweight optical elements such as metalenses. We introduce resonant laser printing technique as a flexible photo-thermal technology for metalens fabrication with the ability to control the light with microscale precision. Our laser printed metalenses can be integrated in bio-sensors, bio-imaging systems, and optofluidical devices.

Atomic Resolution in Crystal Aperture Stem

1990 ◽  
Vol 48 (1) ◽  
pp. 236-237
Author(s):  
J T Fourie
Keyword(s):  
Optical System ◽  
Spherical Aberration ◽  
Three Dimensional ◽  
Transmission Function ◽  
Optical Systems ◽  
Bragg Angle ◽  
Electron Optical System ◽  
Intimate Contact ◽  
Diffraction Effects ◽  
Design Aspect

The attempts at improvement of electron optical systems to date, have largely been directed towards the design aspect of magnetic lenses and towards the establishment of ideal lens combinations. In the present work the emphasis has been placed on the utilization of a unique three-dimensional crystal objective aperture within a standard electron optical system with the aim to reduce the spherical aberration without introducing diffraction effects. A brief summary of this work together with a description of results obtained recently, will be given.The concept of utilizing a crystal as aperture in an electron optical system was introduced by Fourie who employed a {111} crystal foil as a collector aperture, by mounting the sample directly on top of the foil and in intimate contact with the foil. In the present work the sample was mounted on the bottom of the foil so that the crystal would function as an objective or probe forming aperture. The transmission function of such a crystal aperture depends on the thickness, t, and the orientation of the foil. The expression for calculating the transmission function was derived by Hashimoto, Howie and Whelan on the basis of the electron equivalent of the Borrmann anomalous absorption effect in crystals. In Fig. 1 the functions for a g220 diffraction vector and t = 0.53 and 1.0 μm are shown. Here n= Θ‒ΘB, where Θ is the angle between the incident ray and the (hkl) planes, and ΘB is the Bragg angle.

SPATIAL AND TEMPORAL INSTABILITIES IN PASSIVE OPTICAL SYSTEMS

1988 ◽  
Vol 49 (C2) ◽  
pp. C2-343-C2-348
Author(s):  
L. A. LUGIATO ◽  
C. OLDANO ◽  
Kaige WANG ◽  
L. SANTIRANA ◽  
L. M. NARDUCCI ◽  
...  
Keyword(s):  
Optical Systems
Sign in / Sign up

Export Citation Format

Share Document