scholarly journals Mass-producible micro-optical elements by injection compression molding and focused ion beam structured titanium molding tools

2020 ◽  
Vol 45 (5) ◽  
pp. 1184 ◽  
Author(s):  
Simon Ristok ◽  
Marcel Roeder ◽  
Simon Thiele ◽  
Mario Hentschel ◽  
Thomas Guenther ◽  
...  
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Compression Molding ◽  
Optical Elements ◽  
Injection Compression Molding

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

A Study of Two-Stage Micro Injection Compression Molding Process for Diffractive Optical Lens

2007 ◽  
Vol 364-366 ◽  
pp. 1211-1214 ◽  
Author(s):  
Chao Chang Arthur Chen ◽  
Shi Chi Kao
Keyword(s):  
Mold Insert ◽  
Fresnel Lens ◽  
Compression Molding ◽  
Piezo Actuator ◽  
Molding Process ◽  
Spherical Lens ◽  
Two Stage ◽  
Optical Elements ◽  
Micro Features ◽  
Injection Compression Molding

This research aimed to develop a novel two-stage micro injection compression molding (μ-ICM) process for fabrication of plastic diffractive optic elements (DOE). The DOE was designed with the spherical coefficients and the Fresnel lens. A piezo actuator was installed inside the mold plate for activating the mold insert for the second compression motion for micro ICM of the DOE lens. The first experiment proceeded to find the operation window of Fresnel lens and then compare the product weight of flat spherical lens by injection molding (IM), injection compression molding (ICM) and μ-ICM. The second experiment was to investigate the effectiveness of micro compression activated by the piezo actuator by the transfer ratio of grooves (TRG) of the DOE lens with spherical lens and Fresnel lens. Results showed that the μ-ICM of the DOE can obtain the highest TRG than that of IM and conventional ICM processes. Therefore, results of this research can be explored to related aspheric optical elements with micro features, such as fine lens used in the zoom lens of camera.

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.

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