Optical Image Correlation With A Binary Spatial Light Modulator

1984 ◽  
Vol 23 (6) ◽  
Author(s):  
Demetri Psaltis ◽  
Eung G. Paek ◽  
Santosh S. Venkatesh
Keyword(s):  
Spatial Light Modulator ◽  
Optical Image ◽  
Image Correlation ◽  
Light Modulator

Spatial light modulator system for application as a dynamic diffractive element and in optical image processing

2000 ◽  
Author(s):  
Sven Krueger ◽  
Joern Kamps ◽  
Guenther K. Wernicke ◽  
Hartmut Gruber ◽  
Nazif Demoli ◽  
...  
Keyword(s):  
Image Processing ◽  
Spatial Light Modulator ◽  
Optical Image ◽  
Light Modulator ◽  
Optical Image Processing ◽  
Diffractive Element

Optical image encryption scheme with extended visual cryptography and non-mechanical ptychographic encoding

2022 ◽  
Author(s):  
Han Yu ◽  
Yong Li ◽  
Junhao Zhang ◽  
Dongyu Yang ◽  
Tianhao Ruan ◽  
...  
Keyword(s):  
Image Encryption ◽  
Spatial Light Modulator ◽  
Visual Cryptography ◽  
Optical Image ◽  
Encryption Scheme ◽  
Diffractive Optical Elements ◽  
Light Modulator ◽  
Optical Elements ◽  
Encoding Scheme ◽  
Optical Image Encryption

Abstract Non-mechanical ptychographic encoding (NPE) transforms the secret information into a series of diffractive patterns through a spatial light modulator, saving the need to fabricate the secret objects. Conventionally, the shares in extended visual cryptography (EVC) are printed on transparent sheets or fabricated with diffractive optical elements and metasurface, but these methods are expensive and disposable. To solve these problems, we proposed an optical image encryption scheme that combines EVC and NPE. In the encryption process, the secret image is decomposed into multiple shares that are digitally loaded on the spatial light modulator, and the ciphertexts are generated according to the ptychographic encoding scheme. The decryption is performed by superimposing the shares reconstructed from the ciphertexts. We present optical experiments to demonstrate the feasibility and effectiveness of the proposed method.

scholarly journals Simultaneous Measurement of In-Plane and Out-of-Plane Displacements Using Talbot Fringe Projection

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Haibin Sun ◽  
Tingting Liu
Keyword(s):  
Spatial Light Modulator ◽  
Optical Path ◽  
Image Correlation ◽  
Optical Measurements ◽  
Fringe Projection ◽  
Two Dimensional ◽  
Projection Technique ◽  
Light Modulator ◽  
Out Of Plane ◽  
Computer Controlled

The fringe projection technique has been widely used in optical measurements. In this paper, we demonstrate a scheme to measure the 3D displacement of a deformed sample using Talbot fringe projection. In this process, we designed a two-dimensional square Talbot hologram. In this approach, we used the basic principle of triangulation, and a computer-controlled liquid crystal spatial light modulator (LC-SLM) was placed in the optical path. The Talbot array hologram was displayed on the LC-SLM screen and projected onto the surface of a sample. Two patterns were recorded: one before and one after deformation. We simultaneously acquired the in-plane and out-of-plane displacements using the digital image correlation (DIC) method. This scheme is simple and easily implemented. Theoretical and experimental results are presented.

Compatibility of temporal multiplexed spatial light modulator with optical image processing

2007 ◽  
Vol 275 (1) ◽  
pp. 27-37 ◽  
Author(s):  
Morgan Madec ◽  
Wilfried Uhring ◽  
Jean-Baptiste Fasquel ◽  
Pascal Joffre ◽  
Yannick Hervé
Keyword(s):  
Image Processing ◽  
Spatial Light Modulator ◽  
Optical Image ◽  
Light Modulator ◽  
Optical Image Processing

Color Image Correlation Using A Magneto-Optic Spatial Light Modulator

1988 ◽  
Author(s):  
B. Javidi ◽  
C. J. Kuo ◽  
Y. F. Chen ◽  
J. E. .. Ludman
Keyword(s):  
Spatial Light Modulator ◽  
Color Image ◽  
Image Correlation ◽  
Light Modulator ◽  
Magneto Optic
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