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Micromachines
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Selected Papers from the 8th Asia Pacific Conference on Optics...
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Selected Papers from the 8th Asia Pacific Conference on Optics Manufacture & 3rd International Forum of Young Scientists on Advanced Optical Manufacturing

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D：Materials and Processing".

Deadline for manuscript submissions: closed (15 December 2023) | Viewed by 3849

Special Issue Editors

Prof. Dr. Jiang Guo

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Guest Editor
School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
Interests: intelligent precision machining; surface integrity; precision measurement
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Lingbao Kong

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Guest Editor
Department of Optical Science and Engineering, Fudan University, Shanghai 200438, China
Interests: manufacturing process mechanics; 3D printing; ultra-precision manufacturing and metrology; freeform measurement and characterization; manufacturing process optimization; fring projection; 3D vision; VR/AR/MR; light field; machine learning
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Donglin Xue

E-Mail Website
Guest Editor
Changchun Institute of Optics, Chinese Academy of Sciences, Changchun 130033, China
Interests: space optical remote technology; advanced optical manufacture technology
Special Issues, Collections and Topics in MDPI journals
Dr. Ping Gao

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Guest Editor
Institute of Optoelectronics, Chinese Academy of Sciences, Chengdu 610209, China
Interests: micro-nano manufacturing
Prof. Dr. Chengwei Kang

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Guest Editor
State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: micro/nano manufacturing; precision machining; surface finishing; atomic and close-to-atomic scale manufacturing
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Zhenzhong Wang

E-Mail Website
Guest Editor
School of Aeronautics and Astronautics, Xiamen University, Xiamen 361005, China
Interests: precision engineering; ultra-precision machining technology
Special Issues, Collections and Topics in MDPI journals
Dr. Chunjin Wang

E-Mail Website
Guest Editor
State Key Laboratory of Ultra-Precision Machining Technology, Department of Industrial and Systems Engineering (ISE), The Hong Kong Polytechnic University (PolyU), Hong Kong 999077, China
Interests: ultra-precision machining; polishing/finishing; abrasive machining technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will publish selected papers from the 8th Asia Pacific Conference on Optics Manufacture（APCOM2023）and 3rd International Forum of Young Scientists on Advanced Optical Manufacturing（YSAOM2023）in Micromachines, which will be held in Shenzhen, China, 4–6th  August 2023.

We aim to collect high-quality research papers and review articles from APCOM and YSAOM 2023, which will focus on advanced optical manufacturing technology, optical intelligent manufacturing, ultra-precision manufacturing, precision measurement, intelligent sensing and control, and material science. The conference will cover the following main topics:

  1. Large optical mirror and telescope technology;
  2. Micro-nanostructure optics and manufacturing technologies;
  3. Ultra-precision machining technology for optical complex surfaces and functional structures;
  4. Ultra-precision optical measurement technology and equipment;
  5. High-performance manufacturing technology for short-wavelength optical components;
  6. High-efficiency optical precision processing technologies and new methods;
  7. High-performance optical microstructure manufacturing process and equipment;
  8. Advanced technology and equipment of optical coatings;
  9. Optical design, assembly, and system modeling technology;
  10. Manufacturing and applications of optofluidic chip and liquid crystal optics;

Papers attracting the most interest at the conference or that provide novel contributions will be selected for publication in Micromachines. These papers will be peer-reviewed for validation of research results, developments, and applications.

Prof. Dr. Jiang Guo
Prof. Dr. Lingbao Kong
Prof. Dr. Donglin Xue
Dr. Ping Gao
Prof. Dr. Chengwei Kang
Dr. Zhenzhong Wang
Dr. Chunjin Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (4 papers)

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Research

18 pages, 29595 KiB  
Communication
High Repetition Frequency Solid-State Green Laser with Large Stable Area for Water Jet Guided
by Ji Wang and Wenwu Zhang
Micromachines 2023, 14(12), 2231; https://doi.org/10.3390/mi14122231 - 12 Dec 2023
Viewed by 710
Abstract
This paper presents the design and experimental results of a long cavity length Nd:YAG laser with a large stable zone for water jet-guided laser (WJGL) applications. The design is based on the light transmission matrix and resonator stability conditions, aiming to achieve a [...] Read more.
This paper presents the design and experimental results of a long cavity length Nd:YAG laser with a large stable zone for water jet-guided laser (WJGL) applications. The design is based on the light transmission matrix and resonator stability conditions, aiming to achieve a large stable zone and a short cut-off thermal focal length (CTFL). A folded concave resonator is researched to enhance the cavity length, and the influence of the tunable cavity arm length on the oscillating beam in the resonator and in the YAG crystal is theoretically studied. Moreover, the effects of the output mirror curvature and the cavity arm length on the range of the stable area and the cut-off thermal focal length are also investigated. Experimental results show that a stable green laser output is obtained after second harmonic generation (SHG) with a pulse width ranging from 43 to 143 ns within the laser operating frequency range of 5–20 kHz. At an operation frequency of 10 kHz, the output power is 21.33 W, and the instability of the output power within 400 min is 0.88%. The laser source achieves a maximum power of 25.7 W at 20 kHz, and the maximum single pulse energy reaches 2.7 mJ at 6 kHz. Finally, this is used as the laser source to couple with a water jet with a diameter of 100 microns, achieving a lossless water conductivity transmission over 60 mm length. These results demonstrate the suitability of the designed laser source for WJGL technology research. In precision machining applications, this technology exhibits processing advantages of low thermal damage (~2 μm) and large depth (>10 mm), for 7075 aluminum alloy. Full article
(This article belongs to the Special Issue Selected Papers from the 8th Asia Pacific Conference on Optics Manufacture & 3rd International Forum of Young Scientists on Advanced Optical Manufacturing)
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10 pages, 3721 KiB  
Article
Measurement and Characterization of Rotational Errors of Aerostatic Bearings in Subnanometer Accuracy
by Ping Wang, Lingbao Kong, Huijun An, Minge Gao, Hailong Cui and Dajiang Lei
Micromachines 2023, 14(10), 1952; https://doi.org/10.3390/mi14101952 - 19 Oct 2023
Viewed by 658
Abstract
Measuring the running accuracy of aerostatic bearings is challenging because of the high-precision requirements in rotational motion. This paper presents an ultra-high precision measurement method for aerostatic bearings using atomic force microscopy (AFM) as the displacement sensor. The Donaldson reversal method was used [...] Read more.
Measuring the running accuracy of aerostatic bearings is challenging because of the high-precision requirements in rotational motion. This paper presents an ultra-high precision measurement method for aerostatic bearings using atomic force microscopy (AFM) as the displacement sensor. The Donaldson reversal method was used to separate the artifact form errors from the measurement results. A measurement system was developed with the integration of an AFM module. The effects of sensor nonlinearity, environmental noise, and structural vibration on the measurement results were effectively suppressed in the system. The experimental results show that the measurement achieves up to subnanometer accuracy. Full article
(This article belongs to the Special Issue Selected Papers from the 8th Asia Pacific Conference on Optics Manufacture & 3rd International Forum of Young Scientists on Advanced Optical Manufacturing)
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10 pages, 4069 KiB  
Article
Pre-Compensation of Thermal Error for Laser-Assisted Diamond Turning
by Kaiyuan You, Guangyu Liu, Guangpeng Yan, Fengzhou Fang, Wei Wang, Li Du and Jiexiong Ding
Micromachines 2023, 14(10), 1843; https://doi.org/10.3390/mi14101843 - 27 Sep 2023
Viewed by 744
Abstract
The laser-assisted diamond turning (LADT) method can effectively improve the machinability of hard and brittle materials based on the laser heating effect, resulting in prolonged diamond tool life and better surface integrity. However, due to the incomplete absorption of laser beam energy within [...] Read more.
The laser-assisted diamond turning (LADT) method can effectively improve the machinability of hard and brittle materials based on the laser heating effect, resulting in prolonged diamond tool life and better surface integrity. However, due to the incomplete absorption of laser beam energy within the workpiece cutting zone, simultaneous heating of the tool holder occurs, resulting in a structural thermal expansion that affects the workpiece form accuracy. In this article, the form accuracy of a LADT-machined workpiece was systematically studied. Accurate calculations of the tool shank and tool holder thermal fields and thermal expansion were performed using thermodynamic coupled finite element analysis. In addition, the LADT tool path was precisely pre-compensated by taking into account the structure expansion. The experimental results demonstrate that the form accuracy can be significantly improved with a pre-compensated tool path, which provides crucial technical support for achieving a high-precision finish on optical elements using the LADT method. Full article
(This article belongs to the Special Issue Selected Papers from the 8th Asia Pacific Conference on Optics Manufacture & 3rd International Forum of Young Scientists on Advanced Optical Manufacturing)
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15 pages, 8515 KiB  
Article
Study on the Fabrication Process of X-ray Focusing Mirrors
by Qiuyan Liao, Fei Ding, Zhigao Chen, Duo Li and Bo Wang
Micromachines 2023, 14(9), 1666; https://doi.org/10.3390/mi14091666 - 26 Aug 2023
Viewed by 1272
Abstract
The eXTP (enhanced X-ray Timing and Polarization) satellite is a prominent X-ray astronomy satellite designed primarily for conducting deep space X-ray astronomical observations. The satellite’s scientific payload consists of X-ray focusing mirrors. In order to fulfill the requirements of weight reduction and enhanced [...] Read more.
The eXTP (enhanced X-ray Timing and Polarization) satellite is a prominent X-ray astronomy satellite designed primarily for conducting deep space X-ray astronomical observations. The satellite’s scientific payload consists of X-ray focusing mirrors. In order to fulfill the requirements of weight reduction and enhanced effective area, the thickness of mirrors is reduced to the sub-millimeter range and a multi-layer nested structure is employed. Manufacturing mirrors poses a significant challenge to both their quality and efficiency. The present research investigates the optimal replication process for mandrel ultraprecision machining, polishing, coating, electroforming nickel, and demolding. It analyzes the factors contributing to the challenging separation and the inability to release the mirror shells. Additionally, an automatic demolding device is developed, and the X-ray performance of the replication mirrors is verified. The fabrication process flow of the mirrors was initially introduced. To ensure the easy release of the mirror shells from the mandrels, a layer of diamond-like carbon (DLC) was applied as a release layer between the Au and NiP alloy. The adhesion strength of Au-C was found to be significantly lower than that of Au-NiP, as demonstrated by both molecular dynamic simulation and tensile testing. The development of an automatic demolding device with force feedback has been successfully completed. The reduction in the half-power diameter (HPD) of the mirror from 48 inches to 25 inches is an improvement that surpasses the production target. Full article
(This article belongs to the Special Issue Selected Papers from the 8th Asia Pacific Conference on Optics Manufacture & 3rd International Forum of Young Scientists on Advanced Optical Manufacturing)
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