Our Work

Monocular Real Time Full Resolution Depth Estimation Arrangement with a Tunable Lens / March 2022
Ricardo Oliva-García, Sabato Ceruso, José G. Marichal-Hernández and José M. Rodriguez-Ramos
This work introduces a real-time full-resolution depth estimation device, which allows integral displays to be fed with a real-time light-field. The core principle of the technique is a high-speed focal stack acquisition method combined with an efficient implementation of the depth estimation algorithm, …

New high repeatability wafer geometry measurement technique for full 200mm and 300mm blank wafers / March 2022
Juan Trujillo, Álvaro Pérez, Óscar Casanova, Miriam Velasco, Sabato Ceruso, Ricardo Oliva, Óscar Gómez, Javier Martín, Alex Roqué, José Manuel Rodríguez, Jan O. Gaudestad
Wave Front Phase Imaging (WFPI), a new wafer geometry technique, is presented, that acquires 7.65 million data points in 5 seconds on a full 300mm wafer providing lateral resolution of 96µm.

The optics of the human eye at 8.6 µm resolution / December 2021
Wooptix’ team with the collaboration of Damien Gatinel & Jack T. Holladay
In this work, we characterize the in vivo ocular optics of the human eye with a lateral resolution of 8.6 microns, which implies roughly 1 million measurement points for a pupil diameter of 9 mm. The results suggest that the normal human eye presents a series of hitherto unknown optical patterns. This discovery could have a great impact on the way we understand some fundamental mechanisms of human vision.

Relative multiscale deep depth from focus / August 2021
Sabato Ceruso, Sergio Bonaque-González, Ricardo Oliva-García, José Manuel Rodríguez-Ramos
The problem of reconstructing a depth map from a sequence of differently focused images (focal stack) is called Depth from focus. The core idea of this method is to analyze the sharpness of each pixel and compare it along the axis of the focal stack to estimate the true depth value. This approach has two main drawbacks: it depends on the optics of the camera and on the focus measure operator…

Inverse Multiscale Discrete Radon Transform by Filtered Backprojection / July 2021
José G. Marichal-Hernández, Ricardo Oliva-García, Óscar Gómez-Cárdenes, Iván Rodríguez-Méndez, José M. Rodríguez-Ramos
The Radon transform is a valuable tool in inverse problems such as the ones present in electromagnetic imaging. Up to now the inversion of the multiscale discrete Radon transform has been only possible by iterative numerical methods while the continuous Radon transform is usually tackled…

PREPRINT / The optics of the human eye at 8.6 micrometer lateral resolution / March 2021
Wooptix’ team with the collaboration of Damien Gatinel & Jack T. Holladay
In this work, we characterize the in vivo ocular optics of the human eye with a lateral resolution of 8.6 microns, which implies roughly 1 million measurement points for a pupil diameter of 9 mm. The results suggest that the normal human eye presents a series of hitherto unknown optical patterns.

Roughness Measurement of a Silicon Wafer Using Wave Front Phase Imaging / August 2020
Juan Manuel Trujillo-Sevilla, José Manuel Rodríguez-Ramos, Jan Olaf Gaudestad
In this paper we introduce a new metrology technique for measuring wafer geometry on silicon wafers. Wave Front Phase Imaging (WFPI) has high lateral resolution and is sensitive enough to measure roughness on a silicon wafer by simply acquiring a single image snapshot of the entire wafer.

New high-resolution wave ophthalmic instrument for the characterizing ocular optics / February 2020
Sergio Bonaque, Juan Manuel Trujillo, Oscar Casanova, David Carmona, Miguel Sicilia, Sabato Ceruso, Jan Gaudestad, José Manuel Rodríguez-Ramos
We present a new wave front sensing technique based on detecting the propagating light waves. This allows the user to acquire millions of data points within the pupil of the human eye; …