Imaging harmonic diffractive lens for RGB LED radiation

2021 ◽  
Author(s):  
Grigoriy Greisukh ◽  
Evgeny Ezhov ◽  
Artem I. Antonov
Keyword(s):  
Diffractive Lens

Paraffin diffractive lens for sub-terahertz range simple and cost efficient solution

2021 ◽  
pp. 1-1
Author(s):  
Agnieszka Siemion ◽  
Mateusz Surma ◽  
Pawe Komorowski ◽  
Przemyslaw Zagrajek ◽  
Micha Walczakowski ◽  
...  
Keyword(s):  
Efficient Solution ◽  
Terahertz Range ◽  
Diffractive Lens ◽  
Cost Efficient

44-3: Nanoscopic Patterned Photo-alignment for Electrically Switchable Liquid Crystal Pancharatnam-Berry Phase Diffractive Lens

2016 ◽  
Vol 47 (1) ◽  
pp. 599-601 ◽  
Author(s):  
Alwin Ming Wai Tam ◽  
Fan Fan ◽  
Hung-Shan Chen ◽  
Tao Du ◽  
Vladimir G. Chigrinov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Berry Phase ◽  
Diffractive Lens ◽  
Photo Alignment

scholarly journals Programmable diffractive lens for ophthalmic application

2014 ◽  
Vol 53 (6) ◽  
pp. 061709
Author(s):  
María S. Millán ◽  
Elisabet Pérez-Cabré ◽  
Lenny A. Romero ◽  
Natalia Ramírez
Keyword(s):  
Diffractive Lens

Fabrication of Multilevel Silicon Diffractive Lens at Terahertz Frequency

2013 ◽  
Vol 3 (4) ◽  
pp. 479-485 ◽  
Author(s):  
Shimul C. Saha ◽  
Chong Li ◽  
Yong Ma ◽  
James P. Grant ◽  
David R. S. Cumming
Keyword(s):  
Terahertz Frequency ◽  
Diffractive Lens

MEMS-based VCSEL beam steering using replicated polymer diffractive lens

2008 ◽  
Vol 142 (1) ◽  
pp. 336-345 ◽  
Author(s):  
Karin Hedsten ◽  
Jonas Melin ◽  
Jörgen Bengtsson ◽  
Peter Modh ◽  
David Karlén ◽  
...  
Keyword(s):  
Beam Steering ◽  
Diffractive Lens

Broadband achromatic multilevel diffractive lens at visible frequency

2021 ◽  
Author(s):  
Gensen Yang ◽  
Fei Zhang ◽  
Yongjian Liu ◽  
Mingbo Pu ◽  
Yinghui Guo ◽  
...  
Keyword(s):  
Diffractive Lens ◽  
Visible Frequency

High-precision Shack-Hartmann wavefront sensing with a multi-focal diffraction Taiji-lenslet array

Laser Physics ◽  
2021 ◽  
Vol 31 (12) ◽  
pp. 125401
Author(s):  
Yaling Yang ◽  
Yanli Zhang ◽  
Junyong Zhang ◽  
You Li ◽  
Dean Liu
Keyword(s):  
Large Scale ◽  
Measurement Accuracy ◽  
Laser Beams ◽  
Diffractive Lens ◽  
Wavefront Sensors ◽  
Entrance Pupil ◽  
Optical Elements ◽  
Lenslet Array ◽  
Location Algorithm ◽  
Detection Instrument

Abstract A Hartmann wavefront sensor is a type of wavefront detection instrument that has been widely used in various fields. Traditional Hartmann wavefront sensors usually comprise a monofocal refraction lenslet array to segment the wavefront at the entrance pupil. Each wavelet is focused at the focal plane along the projection of the lenslet, forming the foci array. Unlike the multifocal self-interference Taiji-lenslet array, a type of multifocal diffraction Taiji-lenslet array was proposed in this study to improve the measurement accuracy using the weighted centroid location algorithm of these multifocal spots, where the latter is more easily designed than the former. An optical experiment was implemented using the multifocal diffraction Taiji-lenslet array to verify its effectiveness. As a type of diffractive lens, a large-aperture Taiji-lenslet array can be easily fabricated via lithography, which has great potential for application in the measurement of large-scale laser beams and optical elements.

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