Fabrication of large-scale infrared diffractive lens arrays on chalcogenide glass by means of step-and-repeat hot imprinting and non-isothermal glass molding

2021 ◽  
Author(s):  
Yang Shu ◽  
Tiantong Chen ◽  
Wenchen Zhou ◽  
Zhixiong Zhou ◽  
Allen Y. Yi
Keyword(s):  
Chalcogenide Glass ◽  
Large Scale ◽  
Diffractive Lens ◽  
Glass Molding

scholarly journals Fabrication Large-scale Diffractive Lens Arrays on Chalcogenide Glass by Means of Step-and-Repeat Hot Imprinting and Non-Isothermal Glass Molding

2021 ◽  
Author(s):  
Yang Shu ◽  
Tiantong Chen ◽  
Wenchen Zhou ◽  
zhixiong Zhou ◽  
Allen Y Yi
Keyword(s):  
Chalcogenide Glass ◽  
Large Scale ◽  
Casting Process ◽  
Cost Effective ◽  
Process Chain ◽  
Pdms Mold ◽  
Diffractive Lens ◽  
Lens Array ◽  
Glass Molding ◽  
Different Temperatures

Abstract In this study, a new cost-effective and high-precision process chain for the fabrication of large-scale diffractive lens arrays on chalcogenide glass is proposed. First, a positive diffractive lens array is fabricated on a PMMA master substrate by employing a step-and-repeat hot imprinting process. The direct hot imprinting can transfer the microstructures from a heated mold to the polymer substrate accurately. Repeating the hot imprinting process according to a predetermined path, the desired diffractive lens array is obtained. Unlike photolithography and electron-beam writing, which are expensive technologies with sophisticated process, the hot imprinting is an easier, cheaper and more eco-friendly method for fabricating diffractive features with continuous profile. Afterwards a casting process is applied to create a PDMS mold with the negative features. The diffractive lens array with continuous profile is successfully transferred from the master substrate to the PDMS elastomer, which is used as a mold for subsequent precision glass molding. Finally, the microstructures of PDMS mold are replicated to the chalcogenide glass by non-isothermal glass molding. In this process, the mold and workpiece are set at different temperatures. The PDMS mold at low temperature maintains enough rigidity, so as to press the features into the softened chalcogenide glass more easily, which is at relatively higher temperature, resulting in a positive high-fidelity diffractive lens array on the chalcogenide glass. Surface profiles and optical performance of the fabricated components are characterized quantitatively. Results showed that large-scale diffractive lens array with continuous profile can be successfully fabricated on Chalcogenide glass by this proposed process chain with high quality and integrity.

High-precision Shack-Hartmann wavefront sensing with a multi-focal diffraction Taiji-lenslet array

Laser Physics ◽  
2021 ◽  
Vol 31 (12) ◽  
pp. 125401
Author(s):  
Yaling Yang ◽  
Yanli Zhang ◽  
Junyong Zhang ◽  
You Li ◽  
Dean Liu
Keyword(s):  
Large Scale ◽  
Measurement Accuracy ◽  
Laser Beams ◽  
Diffractive Lens ◽  
Wavefront Sensors ◽  
Entrance Pupil ◽  
Optical Elements ◽  
Lenslet Array ◽  
Location Algorithm ◽  
Detection Instrument

Abstract A Hartmann wavefront sensor is a type of wavefront detection instrument that has been widely used in various fields. Traditional Hartmann wavefront sensors usually comprise a monofocal refraction lenslet array to segment the wavefront at the entrance pupil. Each wavelet is focused at the focal plane along the projection of the lenslet, forming the foci array. Unlike the multifocal self-interference Taiji-lenslet array, a type of multifocal diffraction Taiji-lenslet array was proposed in this study to improve the measurement accuracy using the weighted centroid location algorithm of these multifocal spots, where the latter is more easily designed than the former. An optical experiment was implemented using the multifocal diffraction Taiji-lenslet array to verify its effectiveness. As a type of diffractive lens, a large-aperture Taiji-lenslet array can be easily fabricated via lithography, which has great potential for application in the measurement of large-scale laser beams and optical elements.

scholarly journals A Review of the Precision Glass Molding of Chalcogenide Glass (ChG) for Infrared Optics

Micromachines ◽  
2018 ◽  
Vol 9 (7) ◽  
pp. 337 ◽  
Author(s):  
Tianfeng Zhou ◽  
Zhanchen Zhu ◽  
Xiaohua Liu ◽  
Zhiqiang Liang ◽  
Xibin Wang
Keyword(s):  
Chalcogenide Glass ◽  
Glass Molding ◽  
Infrared Optics ◽  
Precision Glass Molding

scholarly journals Design and Fabrication of Low Cost Infrared Optical System Using Precision Glass Molding Lens Made by Chalcogenide Glass

2012 ◽  
Vol 23 (4) ◽  
pp. 154-158
Author(s):  
Seung Eun Oh ◽  
Sun Kyu Lee ◽  
Joong Kyu Choi ◽  
Kook Hyun Song ◽  
Jong Sik Baek
Keyword(s):  
Chalcogenide Glass ◽  
Optical System ◽  
Low Cost ◽  
Glass Molding ◽  
Precision Glass Molding

Localized rapid heating process for precision chalcogenide glass molding

2015 ◽  
Vol 73 ◽  
pp. 62-68 ◽  
Author(s):  
Hui Li ◽  
Peng He ◽  
Jianfeng Yu ◽  
L. James Lee ◽  
Allen Y. Yi
Keyword(s):  
Chalcogenide Glass ◽  
Rapid Heating ◽  
Heating Process ◽  
Glass Molding

Precision glass molding of complex shaped chalcogenide glass lenses for IR applications

2016 ◽  
Author(s):  
Jan-Helge Staasmeyer ◽  
Yang Wang ◽  
Gang Liu ◽  
Olaf Dambon ◽  
Fritz Klocke
Keyword(s):  
Chalcogenide Glass ◽  
Glass Molding ◽  
Precision Glass Molding ◽  
Glass Lenses
Sign in / Sign up

Export Citation Format

Share Document