A5041662318- Advanced Surface Polishing Techniques
- Advanced optical system design
- Advanced Measurement and Metrology Techniques
- Surface Roughness and Optical Measurements
- Adaptive optics and wavefront sensing
- Advanced Numerical Analysis Techniques
- Optical Coatings and Gratings
- Radiopharmaceutical Chemistry and Applications
- Phase-change materials and chalcogenides
- Advanced Optical Imaging Technologies
- Management of metastatic bone disease
- Optical Systems and Laser Technology
- Nanofabrication and Lithography Techniques
- Glass properties and applications
- Advanced Radiotherapy Techniques
The Ohio State University
2013-2022
Ametek (United States)
2022
WellStar Kennestone Hospital
1988
Artificial compound eyes are typically designed on planar substrates due to the limits of current imaging devices and available manufacturing processes. In this study, a high precision, low cost, three-layer 3D artificial eye consisting microlens array, freeform lens field array was constructed mimic an apposition curved substrate. The manufactured substrate alter incident light beams steer their respective images onto flat image plane. optical design performed using ZEMAX. simulation shows...
Continuous diffractive optical elements (CDOEs) can be used for laser-beam reshaping, pattern generation and help reduce large angle scattering. Lithography, the method production of binary surfaces, is not suitable fabrication CDOEs. Diamond turning using fast tool servo, on other hand, a non-cleanroom generating continuous microstructures with high precision efficiency. In this paper, an algorithm designing CDOEs introduced. The moving least-squares (MLS) then to obtain local fitting...
Single-point diamond turning assisted with slow/fast tool servo is a viable technique for complex microlens arrays manufacturing. However, there are still challenges one must overcome when efficiently fabricating discontinuous features. In this study, novel slow-tool-servo method, termed toroid-surface-based slow was proposed generation of discontinuously structured arrays. A discussion on the advantages processing features presented and hexagonal spherical array over large area fabricated...
A novel fabrication method by combining high-speed single-point diamond milling and precision compression molding processes for of discontinuous freeform microlens arrays was proposed. Compared with slow tool servo broaching, selected its flexibility in the true 3D optical surfaces features. The advantage is that surface features can be constructed sequentially spacing axes a virtual spindle at arbitrary positions based on combination rotational translational motions both linear slides. By...
Chalcogenide glasses are emerging as alternative materials for low-cost and high-volume glass molding processes infrared optics. In precision molding, it is well documented that the refractive index variation in molded elements can lead to substantial amounts of aberrations. The has such a significant effect optical designs with lenses need be carefully considered compensated achieve targeted performance. This research aimed evaluate change chalcogenide during process by both finite element...
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 high cost or poor image quality. To cope with these issues, this research, a novel endoscope utilizing an off-axis freeform optics is developed by using integrated ultraprecision diamond machining process. The major components of include prism two...
Freeform optical surface shapes have evolved from an intriguing design concept to a practical necessity for applications ranging space and defense consumer electronics. The demand freeform solutions is no more strongly felt than in the development of digital immersive displays augmented mixed reality, where combination exceptionally high performance combines with ergonomic constraints wearable interactive technologies. Some these advanced designs call diffraction-limited at large fields view...