Continuous-phase diffractive optical element for realizing uniform illumination on the plane nonperpendicular to the optical axis

1999 ◽  
Author(s):  
Qiaofeng Tan ◽  
Yingbai Yan ◽  
Guofan Jin ◽  
Minxian Wu
Keyword(s):  
Optical Axis ◽  
Optical Element ◽  
Continuous Phase ◽  
Diffractive Optical Element ◽  
Uniform Illumination

Continuous-phase diffractive optical element for uniform focal spot

1999 ◽  
Author(s):  
Qiaofeng Tan ◽  
Yingbai Yan ◽  
Guofan Jin ◽  
Minxian Wu
Keyword(s):  
Focal Spot ◽  
Optical Element ◽  
Continuous Phase ◽  
Diffractive Optical Element

scholarly journals Generation of Color Images by Utilizing a Single Composite Diffractive Optical Element

Micromachines ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 508 ◽  
Author(s):  
Jiazhou Wang ◽  
Liwei Liu ◽  
Axiu Cao ◽  
Hui Pang ◽  
Chuntao Xu ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Color Image ◽  
Optical Axis ◽  
Optical Element ◽  
Diffractive Optical Element ◽  
Successful Operation ◽  
New Approach ◽  
Holographic Imaging ◽  
Axis Position ◽  
The Relationship

This paper presents an approach that is capable of producing a color image using a single composite diffractive optical element (CDOE). In this approach, the imaging function of a DOE and the spectral deflection characteristics of a grating were combined together to obtain a color image at a certain position. The DOE was designed specially to image the red, green, and blue lights at the same distance along an optical axis, and the grating was designed to overlay the images to an off-axis position. We report the details of the design process of the DOE and the grating, and the relationship between the various parameters of the CDOE. Following the design and numerical simulations, a CDOE was fabricated, and imaging experiments were carried out. Both the numerical simulations and the experimental verifications demonstrated a successful operation of this new approach. As a platform based on coaxial illumination and off-axis imaging, this system is featured with simple structures and no cross-talk of the light fields, which has huge potentials in applications such as holographic imaging.

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
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