An integrated approach to design and fabrication of a miniature endoscope using freeform optics
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Hui Li
Abstract
Endoscopes are important medical optical devices widely used in minimally invasive surgery. However, manufacturing issues such as tight packaging constraints and tolerance requirements hinder their development. These problems often result in high manufacturing cost or poor image quality. To cope with these issues, in this research, a novel endoscope utilizing an off-axis freeform optics is developed by using an integrated ultraprecision diamond machining process. The major optical components of this endoscope include a prism with two reflective surfaces and a freeform entrance surface. In addition, a doublet and a field lens were added to complete the system design. To validate the feasibility of the endoscope design, single-point diamond turning and rastering processes were utilized to machine the required components. After the lenses were machined, the geometry of the lenses was measured using a white light optical profilometer. The results show that their profiles have a manufacture error of ±2 μm along the optical axis. Lastly, the prototype was assembled and tested to evaluate its imaging performance, including measurement of its modulation transfer function.
Funding source: National Science Foundation
Award Identifier / Grant number: 1448935
Funding statement: This study was partially based on the work supported by National Science Foundation, Division of Industrial Innovation and Partnerships, under grant number 1448935. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
Acknowledgments
This study was partially based on the work supported by National Science Foundation, Division of Industrial Innovation and Partnerships, under grant number 1448935. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
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©2016 THOSS Media & De Gruyter
Articles in the same Issue
- Cover and Frontmatter
- Community
- News from the European Optical Society
- News
- Conference Calendar
- Topical issue: Plastic optics
- Editorial
- Topical issue on plastic optics
- Tutorial
- Process influences and correction possibilities for high precision injection molded freeform optics
- Short Communication
- Diamond machining of steel molds for optical components
- Review Articles
- Additive manufacturing of optical components
- Precision injection molding of freeform optics
- Research Articles
- Methodology for the design, production, and test of plastic optical displacement sensors
- An integrated approach to design and fabrication of a miniature endoscope using freeform optics
- Wavefront measurement of plastic lenses for mobile-phone applications
- Diamond turning fabrication of an ultra-compact endoscope
Articles in the same Issue
- Cover and Frontmatter
- Community
- News from the European Optical Society
- News
- Conference Calendar
- Topical issue: Plastic optics
- Editorial
- Topical issue on plastic optics
- Tutorial
- Process influences and correction possibilities for high precision injection molded freeform optics
- Short Communication
- Diamond machining of steel molds for optical components
- Review Articles
- Additive manufacturing of optical components
- Precision injection molding of freeform optics
- Research Articles
- Methodology for the design, production, and test of plastic optical displacement sensors
- An integrated approach to design and fabrication of a miniature endoscope using freeform optics
- Wavefront measurement of plastic lenses for mobile-phone applications
- Diamond turning fabrication of an ultra-compact endoscope
