Extended focus diffractive optical element for Gaussian laser beams

2006 ◽  
Vol 45 (1) ◽  
pp. 144 ◽  
Author(s):  
Michael A. Golub ◽  
Valery Shurman ◽  
Israel Grossinger
Keyword(s):  
Optical Element ◽  
Diffractive Optical Element ◽  
Laser Beams

Generating hypergeometric laser beams with a diffractive optical element

2008 ◽  
Vol 47 (32) ◽  
pp. 6124 ◽  
Author(s):  
V. V. Kotlyar ◽  
A. A. Kovalev ◽  
R. V. Skidanov ◽  
S. N. Khonina ◽  
J. Turunen
Keyword(s):  
Optical Element ◽  
Diffractive Optical Element ◽  
Laser Beams

scholarly journals Holographic Display System to Suppress Speckle Noise Based on Beam Shaping

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 204
Author(s):  
Di Wang ◽  
Yi-Wei Zheng ◽  
Nan-Nan Li ◽  
Qiong-Hua Wang
Keyword(s):  
Optical Element ◽  
Speckle Noise ◽  
Beam Shaping ◽  
Diffractive Optical Element ◽  
The Other ◽  
Spatial Light Modulators ◽  
Viewing Angle ◽  
Display System ◽  
Holographic Display ◽  
Light Modulators

In this paper, a holographic system to suppress the speckle noise is proposed. Two spatial light modulators (SLMs) are used in the system, one of which is used for beam shaping, and the other is used for reproducing the image. By calculating the effective viewing angle of the reconstructed image, the effective hologram and the effective region of the SLM are calculated accordingly. Then, the size of the diffractive optical element (DOE) is calculated accordingly. The dynamic DOEs and effective hologram are loaded on the effective regions of the two SLMs, respectively, while the wasted areas of the two SLMs are performed with zero-padded operations. When the laser passes through the first SLM, the light can be modulated by the effective DOEs. When the modulated beam illuminates the second SLM which is loaded with the effective hologram, the image is reconstructed with better quality and lower speckle noise. Moreover, the calculation time of the hologram is reduced. Experiments indicate the validity of the proposed system.

High-efficiency subwavelength diffractive optical element in GaAs for 975 nm

1995 ◽  
Vol 20 (12) ◽  
pp. 1441 ◽  
Author(s):  
M. E. Warren ◽  
R. E. Smith ◽  
G. A. Vawter ◽  
J. R. Wendt
Keyword(s):  
High Efficiency ◽  
Optical Element ◽  
Diffractive Optical Element

Processing and error compensation of diffractive optical element

2014 ◽  
Author(s):  
Yunlong Zhang ◽  
Zhibin Wang ◽  
Feng Zhang ◽  
Hui Qin ◽  
Junqi Li ◽  
...  
Keyword(s):  
Error Compensation ◽  
Optical Element ◽  
Diffractive Optical Element

Optimal design of a multilayer diffractive optical element for dual wavebands

2010 ◽  
Vol 35 (24) ◽  
pp. 4157 ◽  
Author(s):  
Changxi Xue ◽  
Qingfeng Cui ◽  
Tao Liu ◽  
Liangliang Yang ◽  
Bing Fei
Keyword(s):  
Optimal Design ◽  
Optical Element ◽  
Diffractive Optical Element

Characteristics of diffractive optical element for multispot beam homogenizing

2004 ◽  
Author(s):  
Takayuki Hirai ◽  
Keiji Fuse ◽  
Kenichi Kurisu ◽  
Keiji Ebata
Keyword(s):  
Optical Element ◽  
Diffractive Optical Element
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