Fabrication of curved diffractive optical elements by means of laser direct writing, electroplating, and injection compression molding

2019 ◽  
Vol 47 ◽  
pp. 402-409 ◽  
Author(s):  
M. Roeder ◽  
S. Thiele ◽  
D. Hera ◽  
C. Pruss ◽  
T. Guenther ◽  
...  
Keyword(s):  
Compression Molding ◽  
Diffractive Optical Elements ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Optical Elements ◽  
Injection Compression Molding

Challenges in the Fabrication of Microstructured Polymer Optics

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
M. Roeder ◽  
P. Schilling ◽  
K.-P. Fritz ◽  
T. Guenther ◽  
A. Zimmermann
Keyword(s):  
Mold Insert ◽  
Compression Molding ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Optical Elements ◽  
Polymer Optics ◽  
Process Chains ◽  
Ultra Precision ◽  
Injection Compression Molding ◽  
Complete Process

The fabrication of microstructured polymer optics enables a multitude of new options in the design of technical optics. However, challenges arise along the varying process chains of mold insert fabrication, integration into molding tools, replication by means of injection compression molding and metrology. In order to study the effects, diffractive optical elements (DOE) and microlens arrays (MLA) are fabricated using two different process chains. DOEs are fabricated using a laser direct writing (LDW) based mold insert fabrication. The MLA mold insert is produced using ultra-precision milling (UP-milling). Both optical parts are replicated using injection compression molding. The occurring effects are discussed and the results show, that with complete process control high quality microstructured polymer optical parts can be produced and characterized.

Axial Focusing Characteristics of Low F-Number Diffractive Optical Elements with Continuous Relief Fabricated by Laser Direct Writing

2009 ◽  
Vol 29 (11) ◽  
pp. 3192-3196
Author(s):  
单明广 Shan Mingguang ◽  
钟志 Zhong Zhi ◽  
郭黎利 Guo Lili ◽  
智佩 Zhi Pei
Keyword(s):  
Diffractive Optical Elements ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Optical Elements

Laser Power Characterization Method for Fabrication of Centrosymmetric CR-DOEs Mask

2008 ◽  
Vol 53-54 ◽  
pp. 337-342
Author(s):  
Duo Shu Wang ◽  
Chong Tai Luo ◽  
Tao Chen ◽  
Yu Qing Xiong ◽  
Hong Kai Liu ◽  
...  
Keyword(s):  
Laser Power ◽  
Low Cost ◽  
Chromatic Aberration ◽  
Diffractive Optical Elements ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Optical Elements ◽  
Short Period ◽  
Diffractive Efficiency ◽  
Mask Fabrication

With high diffractive efficiency, Continuous Relief Diffractive Optical Elements (CR-DOE) can be used to eliminate chromatic aberration, partial aberration and simplify optical system. The technology for CR-DOE with Laser Direct Writing method has advantages of simple process, short period and low cost. The paper studied on the characterization method of laser power for the technology. The principle of mask fabrication of CR-DOE by Laser Direct Writing is described in the paper. The relations between microstructure depth and laser power, exposing position radius and laser power were studied. The results showed that microstructure depth changes in direct ratio to laser power and laser power should change in direct to exposing position radius while several same depth microstructures were fabricated at different radius. At the end, the paper gave the charactering method and also fabricated the mask of a kind of centrosymmetric continuous relief diffractive focus lens with the method.

scholarly journals Influences on the Fabrication of Diffractive Optical Elements by Injection Compression Molding

2018 ◽  
Vol 2 (1) ◽  
pp. 5 ◽  
Author(s):  
Marcel Roeder ◽  
Peter Schilling ◽  
Daniel Hera ◽  
Thomas Guenther ◽  
André Zimmermann
Keyword(s):  
Compression Molding ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Injection Compression Molding
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