2019
Alonso, Kevin Liang; Miguel A.
Effects on the OTF of MSF structures with random variations Journal Article
In: Optics Express, vol. 27, no. 24, pp. 34665-34680, 2019.
Abstract | Links | BibTeX | Tags: CeFO design
@article{Alonso2019b,
title = {Effects on the OTF of MSF structures with random variations},
author = {Kevin Liang; Miguel A. Alonso },
doi = {10.1364/OE.27.034665},
year = {2019},
date = {2019-11-11},
urldate = {2019-11-11},
journal = {Optics Express},
volume = {27},
number = {24},
pages = {34665-34680},
abstract = {In diamond-machined freeform manufacturing processes, a tool-tip often leaves behind characteristic mid-spatial frequency (MSF) structures on the optical surface. Unwanted movement between the tool-tip and the part results in MSF structures with random variations. Here, we analyze the effects of these MSF structures on the system’s optical performance and derive simple analytic estimates for the optical transfer function in terms of the parameters of these structures. These expressions are expected to aid in MSF tolerancing.},
keywords = {CeFO design},
pubstate = {published},
tppubtype = {article}
}
In diamond-machined freeform manufacturing processes, a tool-tip often leaves behind characteristic mid-spatial frequency (MSF) structures on the optical surface. Unwanted movement between the tool-tip and the part results in MSF structures with random variations. Here, we analyze the effects of these MSF structures on the system’s optical performance and derive simple analytic estimates for the optical transfer function in terms of the parameters of these structures. These expressions are expected to aid in MSF tolerancing.
Bauer, A.; Pesch, M.; Muschaweck, J.; Leupelt, F.; Rolland, J. P.
All-reflective electronic viewfinder enable by freeform optics Journal Article
In: Optics Express, vol. 27, no. 21, pp. 30597-30605, 2019.
Abstract | Links | BibTeX | Tags: CeFO design, CeFO related
@article{BauerARRI,
title = {All-reflective electronic viewfinder enable by freeform optics},
author = {A. Bauer and M. Pesch and J. Muschaweck and F. Leupelt and J. P. Rolland},
url = {https://doi.org/10.1364/OE.27.030597},
year = {2019},
date = {2019-10-14},
journal = {Optics Express},
volume = {27},
number = {21},
pages = {30597-30605},
abstract = {Refractive eyepiece design forms are often limited by chromatic aberrations and require a mix of glass types to achieve sufficient correction, thus they are not conducive to manufacture in volume. Reflective surfaces are inherently achromatic and can be produced in volume, but rotationally symmetric reflective surfaces are either used with lossy obscurations or are incapable of correcting rotationally variant aberrations when used in an unobscured form. Freeform optics enable unobscured reflective design forms with excellent image quality. Here, we document the design, fabrication, and assembly of an all-reflective high-end electronic viewfinder that shows the applicability of freeform surfaces to eyepiece design forms.},
keywords = {CeFO design, CeFO related},
pubstate = {published},
tppubtype = {article}
}
Refractive eyepiece design forms are often limited by chromatic aberrations and require a mix of glass types to achieve sufficient correction, thus they are not conducive to manufacture in volume. Reflective surfaces are inherently achromatic and can be produced in volume, but rotationally symmetric reflective surfaces are either used with lossy obscurations or are incapable of correcting rotationally variant aberrations when used in an unobscured form. Freeform optics enable unobscured reflective design forms with excellent image quality. Here, we document the design, fabrication, and assembly of an all-reflective high-end electronic viewfinder that shows the applicability of freeform surfaces to eyepiece design forms.
2017
Liang, Kevin; Alonso, Miguel A.
MTF as the Fourier Transform of a Pupil-Difference Probability Density Presentation
09.07.2017, ISBN: 978-1-943580-31-6, (Freeform Optics 2017 Denver, Colorado United States 9–13 July 2017).
Abstract | Links | BibTeX | Tags: CeFO design
@misc{Alonso2017,
title = {MTF as the Fourier Transform of a Pupil-Difference Probability Density},
author = {Kevin Liang and Miguel A. Alonso},
editor = {Optical Society of America},
url = {https://doi.org/10.1364/FREEFORM.2017.JTu1C.4},
doi = {https://doi.org/10.1364/FREEFORM.2017.JTu1C.4},
isbn = { 978-1-943580-31-6},
year = {2017},
date = {2017-07-09},
abstract = {We develop the theory for calculating the effects of mid-spatial frequency structures on the modulation transfer function through the Fourier transform of a pupil-difference probability density function. Its implementation is shown for several periodic groove.},
note = {Freeform Optics 2017
Denver, Colorado United States
9–13 July 2017},
keywords = {CeFO design},
pubstate = {published},
tppubtype = {presentation}
}
We develop the theory for calculating the effects of mid-spatial frequency structures on the modulation transfer function through the Fourier transform of a pupil-difference probability density function. Its implementation is shown for several periodic groove.