Topic
Apodization
About: Apodization is a research topic. Over the lifetime, 1742 publications have been published within this topic receiving 21000 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: In this article, an amplitude pupil mask was proposed to preserve both angular resolution and light gathering capabilities of the unapodized pupil, which allows efficient detection of terrestrial extrasolar planets with a 1.5 m telescope.
Abstract: In this paper, an alternative to classical pupil apodization techniques (use of an amplitude pupil mask) is proposed. It is shown that an achromatic apodized pupil suitable for imaging of extrasolar planets can be obtained by reflection of an unapodized flat wavefront on two mirrors. By carefully choosing the shape of these two mirrors, it is possible to obtain a contrast better than 10 9 at a distance smaller than 2λ/d from the optical axis. Because this technique preserves both the angular resolution and light gathering capabilities of the unapodized pupil, it allows efficient detection of terrestrial extrasolar planets with a 1.5 m telescope in the visible.
368 citations
Patent•
TL;DR: In this paper, a variable multi-dimensional apodization control (200) for an ultrasonic transducer array (202) is disclosed. The apodisation control is applicable to both piezoelectric based transducers and to MUT-based transducers.
Abstract: Variable multi-dimensional apodization control (200) for an ultrasonic transducer array (202) is disclosed The variable multi-dimensional apodization control (200) is applicable to both piezoelectric based transducers and to MUT based transducers and allows control of the apodization profile of an ultrasonic transducer array (202) having elements arranged in more than one dimension
338 citations
Patent•
18 Mar 2009
TL;DR: In this article, a dynamic aperture and apodization mask are provided by one or more electroactive elements, and may be used in an ophthalmic device that is spaced apart from but in optical communication with an intraocular lens, a corneal inlay or a spectacle lens that provide an optical power.
Abstract: Optical devices having a dynamic aperture and/or an apodization mask are provided. The aperture and/or mask may be provided by one or more electro-active elements, and may be used in an ophthalmic device that that is spaced apart from but in optical communication with an intraocular lens, a corneal inlay, a corneal onlay, or a spectacle lens that provide an optical power.
244 citations
TL;DR: In this article, an amplitude pupil mask was proposed to preserve both angular resolution and light gathering capabilities of the unapodized pupil, which allows efficient detection of terrestrial extrasolar planets with a 1.5m telescope.
Abstract: In this paper, an alternative to the classical pupil apodization techniques (use of an amplitude pupil mask) is proposed. It is shown that an apodized pupil suitable for imaging of Extrasolar planets can be obtained by reflection of an unapodized flat wavefront on 2 mirrors. By carefully choosing the shape of these 2 mirrors, it is possible to obtain a contrast better than 10^{9} at a distance smaller than 2 \lambda/d from the optical axis. Because this technique preserves both the angular resolution and light gathering capabilities of the unapodized pupil, it allows efficient detection of terrestrial extrasolar planets with a 1.5m telescope in the visible.
233 citations
TL;DR: These results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.
Abstract: We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of −0.8 dB (83%), well matching the experimental value of −0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.
219 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2026 | 1 |
| 2025 | 35 |
| 2024 | 45 |
| 2023 | 91 |
| 2022 | 183 |
| 2021 | 40 |