Micro-optical fabrication by ultraprecision diamond machining and precision molding
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Ultraprecision diamond machining and high volume molding for affordable high precision high performance optical elements are becoming a viable process in optical industry for low cost high quality microoptical component manufacturing. In this process, first high precision microoptical molds are fabricated using ultraprecision single point diamond machining followed by high volume production methods such as compression or injection molding. In the last two decades, there have been steady improvements in ultraprecision machine design and performance, particularly with the introduction of both slow tool and fast tool servo. Today optical molds, including freeform surfaces and microlens arrays, are routinely diamond machined to final finish without post machining polishing. For consumers, compression molding or injection molding provide efficient and high quality optics at extremely low cost. In this paper, first ultraprecision machine design and machining processes such as slow tool and fast too servo are described then both compression molding and injection molding of polymer optics are discussed. To implement precision optical manufacturing by molding, numerical modeling can be included in the future as a critical part of the manufacturing process to ensure high product quality.
Keywordsultraprecision machining slow tool servo fast tool servo compression molding injection molding microlens arrays optical fabrication
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The work was partially based on work supported by an SBIR Phase I project from the National Science Foundation of the US (Grant No. 1315009), an SBIR Phase II project from the National Science Foundation of the US (Grant No. 1456291), and a research grant from the National Science Foundation of the US (Grant No. 1537212); Any opinions, findings, and conclusions or recommendations expressed in this article were those of the authors and do not necessarily reflect the views of the National Science Foundation of the US. The ISO 2.25 high-speed spindle used in this research was provided by Professional Instruments Inc. (www.airbearings. com). Authors also express sincere gratitude to Cedric Sze for some of the photos used in this publication.
- 1.AMETEK Precitech Inc. Precitech white paper directory. 2016. Retrieved from http://www.precitech.com/about/white_papers.htmlGoogle Scholar
- 2.Fuerschbach K, Rolland J P, Rolland-Thompson K P. Realizing freeform: A LWIR imager in a spherical package. In: Renewable Energy and the Environment. OSA, 2013, FW1B.2Google Scholar
- 3.AMETEK Precitech Inc. Slow tool servo. 2016. Retrieved from http://www.precitech.com/machine_options/slow_tool_servo.htmlGoogle Scholar
- 4.AMETEK Precitech Inc. Adaptive control technology. 2016. Retrieved from http://www.precitech.com/machine_options/adaptive_ control_technology.htmlGoogle Scholar
- 5.Chen Y. Thermal forming process for precision freeform optical mirrors and micro glass optics. Dissertation for the Doctoral Degree. Columbus: The Ohio State University,2010Google Scholar
- 7.Levicron. Ultra-precision meets CNC performance. Retrieved from http://levicron.com/?lang = enGoogle Scholar
- 13.Opli Inc. Mobile phone objective camera optical design. 2016. Retrieved from http://www.opli.net/opli_magazine/eo/2013/mobilephone- objective-camera-optical-design.aspxGoogle Scholar
- 14.Schaub M, Schwiegerling J, Fest E, et al. Molded Optics: Design and Manufacture. Boca Raton: CRC Press,2016Google Scholar
- 16.Li H. Design, fabrication and evaluation of nonconventional optical components. Dissertation for the Doctoral Degree. Columbus: The Ohio State University,2016Google Scholar