scholarly journals Modulation efficiency of double-phase hologram complex light modulation macro-pixels

2014 ◽  
Vol 22 (18) ◽  
pp. 21460 ◽  
Author(s):  
Sujin Choi ◽  
Jinyoung Roh ◽  
Hoong Song ◽  
Geeyoung Sung ◽  
Jungkwuen An ◽  
...  
Keyword(s):  
Light Modulation ◽  
Phase Hologram ◽  
Double Phase

Reconstruct holographic 3D objects by double phase hologram

2015 ◽  
Author(s):  
Chih-Hung Ting ◽  
Koki Wakunami ◽  
Kenji Yamamoto ◽  
Yi-Pai Huang
Keyword(s):  
3D Objects ◽  
Phase Hologram ◽  
Double Phase

Low-noise high-efficiency double-phase hologram by multiplying a weight factor

2019 ◽  
Vol 44 (15) ◽  
pp. 3649 ◽  
Author(s):  
Yoo Kwang Kim ◽  
Jin Su Lee ◽  
Yong Hyub Won
Keyword(s):  
High Efficiency ◽  
Low Noise ◽  
Weight Factor ◽  
Phase Hologram ◽  
Double Phase

scholarly journals Spatiotemporal double-phase hologram for complex-amplitude holographic displays

2020 ◽  
Vol 18 (10) ◽  
pp. 100901 ◽  
Author(s):  
Xiaomeng Sui ◽  
Zehao He ◽  
Hao Zhang ◽  
Liangcai Cao ◽  
Daping Chu ◽  
...  
Keyword(s):  
Complex Amplitude ◽  
Phase Hologram ◽  
Double Phase ◽  
Holographic Displays

Parity noise elimination of computer-generated double-phase hologram

1990 ◽  
Vol 73 (11) ◽  
pp. 32-37
Author(s):  
Kouichi Ishida ◽  
Manabu Yoshikawa ◽  
Hiroshi Kayano
Keyword(s):  
Noise Elimination ◽  
Phase Hologram ◽  
Double Phase

Quantitative nano-characterization of heterogeneous catalysts

1995 ◽  
Vol 53 ◽  
pp. 398-399
Author(s):  
P.A. Crozier ◽  
M. Pan
Keyword(s):  
Heterogeneous Catalysts ◽  
Low Dose ◽  
Imaging Techniques ◽  
Structural Features ◽  
Catalyst Characterization ◽  
New Developments ◽  
Double Phase ◽  
Phase Systems ◽  
Dose Imaging

Heterogeneous catalysts can be of varying complexity ranging from single or double phase systems to complicated mixtures of metals and oxides with additives to help promote chemical reactions, extend the life of the catalysts, prevent poisoning etc. Although catalysis occurs on the surface of most systems, detailed descriptions of the microstructure and chemistry of catalysts can be helpful for developing an understanding of the mechanism by which a catalyst facilitates a reaction. Recent years have seen continued development and improvement of various TEM, STEM and AEM techniques for yielding information on the structure and chemistry of catalysts on the nanometer scale. Here we review some quantitative approaches to catalyst characterization that have resulted from new developments in instrumentation.HREM has been used to examine structural features of catalysts often by employing profile imaging techniques to study atomic details on the surface. Digital recording techniques employing slow-scan CCD cameras have facilitated the use of low-dose imaging in zeolite structure analysis and electron crystallography. Fig. la shows a low-dose image from SSZ-33 zeolite revealing the presence of a stacking fault.

Probing the Versatility of Shape-Persistent Tetraphenylmethane Dendrimers by Modification of the Skeleton

2019 ◽  
Author(s):  
Julio Ignacio Urzúa ◽  
Sandra Campana ◽  
Massimo Lazzari ◽  
Mercedes Torneiro
Keyword(s):  
Design Principle ◽  
Focal Point ◽  
Sonogashira Coupling ◽  
Terminal Alkyne ◽  
Double Phase ◽  
Rigid Rod ◽  
Convergent Approach ◽  
First And Second Generation ◽  
Oxidative Homocoupling ◽  
Hypercrosslinked Polymers

Tetraphenylmethane has emerged as a recurrent building block for advanced porous materials such as COFs, PAFs and hypercrosslinked polymers. Guided by a similar design principle, we have previously synthesized shape-persistent dendrimers with tetraphenylmethane nodes and ethynylene linkers. Here we report the generality of our approach by describing new dendritic architectures built from tetraphenylmethane. First, we prepared expanded dendrimers where the tetrahedral units are bonded through larger rigid rod spacers. Among the different synthetic strategies tested, the convergent route, with alternating steps of Pd-catalyzed Sonogashira coupling and alkyne activation by removal of TMS masking groups, efficiently afforded the first- and second-generation dendrimers. A second type of compounds having a linear diyne at the core is also described. The dendrimers of generations 1-2 were also synthesized by a convergent approach, with the diyne being assembled in the last step of the synthesis by a Glaser oxidative homocoupling of the corresponding dendrons bearing a terminal alkyne at the focal point. A third-generation dendrimer was also successfully prepared by a double-phase strategy.<br>

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