A5078304888- Adaptive optics and wavefront sensing
- Advanced Surface Polishing Techniques
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Advanced optical system design
- Surface Roughness and Optical Measurements
- Advanced Measurement and Metrology Techniques
- Laser Material Processing Techniques
- Optical measurement and interference techniques
- Diamond and Carbon-based Materials Research
- solar cell performance optimization
- Cardiac Valve Diseases and Treatments
- CCD and CMOS Imaging Sensors
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Optical Systems and Laser Technology
- Cardiac, Anesthesia and Surgical Outcomes
- Coffee research and impacts
- Cardiovascular and exercise physiology
- Image Processing Techniques and Applications
- Gamma-ray bursts and supernovae
- Advanced X-ray Imaging Techniques
- Photocathodes and Microchannel Plates
- Laser-Plasma Interactions and Diagnostics
- Cardiovascular Disease and Adiposity
Universidad Nacional Autónoma de México
2011-2024
Stanford University
2020
National Institute of Astrophysics, Optics and Electronics
2010
Universidad Autónoma de Baja California
2010
The Reionization and Transients InfraRed camera (RATIR) is a simultaneous optical/NIR multi-band imaging which 100% time-dedicated to the followup of Gamma-ray Bursts. mounted on 1.5-meter Johnson telescope Mexican Observatorio Astronomico Nacional Sierra San Pedro Martir in Baja California. With rapid slew capability autonomous interrupt capabilities, system will image GRBs 6 bands (i, r, Z, Y, J, H) within minutes receiving satellite position, detecting optically faint afterglows NIR...
The Reionization And Transients Infra-Red (RATIR) camera is intended for robotic operation on the 1.5-meter Harold Johnson telescope of Observatorio Astronómico Nacional Sierra de San Pedro Mártir, Baja California, Mexico. This paper describes work we have carried out to successfully automate and prepare it RATIR. One novelty our use real-time absolute astrometry from finder telescopes point guide main telescope.
We report the discovery and characterisation of a super-Earth sub-Neptune transiting bright ( K = 8.8), quiet, nearby (37 pc) M3V dwarf TOI-1266. validate planetary nature TOI-1266 b c using four sectors TESS photometry data from newly-commissioned 1-m SAINT-EX telescope located in San Pedro Mártir (México). also include additional ground-based follow-up as well high-resolution spectroscopy high-angular imaging observations. The inner, larger planet has radius R 2.37 −0.12 +0.16 ⊕ an orbital...
We present optical UBVRI zenith night sky brightness measurements collected on 18 nights during 2013 to 2016 and SQM obtained daily over 20 months 2014 at the Observatorio Astronómico Nacional Sierra San Pedro Mártir (OAN-SPM) in México. The data is based upon CCD images with 0.84 m 2.12 telescopes, while a high-sensitivity, low-cost photometer. typical moonless averaged whole period U = 22.68, B 23.10, V 21.84, R 21.04, I 19.36, 21.88 , once corrected for zodiacal light. find no seasonal...
Previous implementations of the iterative phase shifting method, in which a test object is computed from measurements using interferometer with unknown positions reference, do not provide an accurate way knowing when convergence has been attained. We present new approach to this method that allows us deterministically identify convergence. The tested home-built Fizeau measures optical surfaces polished lambda/100 Hydra tool. intrinsic quality better than 0.5 nm. Other possible applications...
As robots branch out from the manufacturing sector into home, there is a pressing need for new technology that can operate in cluttered and unstructured human environments. Loading unloading dishwasher serves as difficult representative challenge in-home robots, robotic end-effector has been developed this type of task. The actuation fingers integrated with bending degree freedom nearly coincident proximal joints fingers, an arrangement greatly increases kinematic workspace constrained In...
We present a hydrodynamic, deterministic polishing tool (HyDRa) based on the fluid-jet (FJP) principle. In contrast to other FJP methods, flux is accelerated with pressurized air and then expelled at high velocity, forming radial, grazing abrasive pattern that exerts no net force of surface be polished, since vacuum thrust forces are created tool's output balance each out. The effect minimizes microroughness, making it appropriate for finishing high-quality surfaces. principle operation as...
Exact ray tracing is the fundamental tool of geometric optics, it constitutes foundation on which aberration theory and, therefore, optical design based. We present KrakenOS, a Python library focused accuracy and generation systems composed by surfaces with arbitrary shapes orientations, as well compendium practical examples for use our library. describe series quality tests to compare results obtained from KrakenOS respect those commercial software Zemax. Among performance computations, we...
Deterministic hydrodynamic polishing with HyDRa requires a precise control of parameters, such as propelling air pressure, slurry density, flux and tool height. We describe the system prove how precise, deterministic can be achieved in terms these parameters. The results an 84 cm hyperbolic mirror are presented to illustrate stability parameters is important obtain high-quality surfaces.
We present a novel, to the best of our knowledge, approach for reconstructing wavefronts from hartmanngrams, eliminating need precise hole position information. This technique utilizes both intra- and extrafocal hartmanngrams assign set direction cosines each ray. By employing these ray tracing optimization process, wavefront can be effectively recovered. The methodology will outlined, Hartmann test using two kinds screens simulated, results obtained discussed.
The Telescopio San Pedro Martir (TSPM) is a new ground-based optical telescope project, with 6.5 meters honeycomb primary mirror, to be built in the Observatorio Astronomico Nacional on Sierra (OAN-SPM) located Baja California, Mexico. OAN-SPM has an altitude of 2830 above sea level; it among best location for astronomical observation world. It 1830 m higher than atmospheric inversion layer 70% photometric nights, 80% spectroscopic nights and sky brightness up 22 mag/arcsec2. TSPM will...
A wave-front coded imaging system is an optical-digital method for aberration control. Wave-front coding technology incorporates aspheric element in the optical order to capture a image and by digital processing decode it obtain final image. The WFC very insensitive defocus-like aberrations thereby becomes tool balancing telescope systems. We propose be implemented two spherical mirror telescope. In this work we present design simulation of proposed telescope, trade-offs encountered process...
Successful tests and results that confirm an efficient behavior of the new common-pull (controlled vacuum), multiple-push primary mirror cell for 2.1 m telescope at OAN/SPM, are presented. An optical design program reduces information obtained from intra- extra-focal Hartmann patterns, using direction cosines rays cross sampled regions, is discussed. The intrinsic uncertainties this method evaluated.
The Telescopio San Pedro Mártir project intends to construct a 6.5m telescope be installed at the Observatorio Astronómico Nacional in Sierra northern Baja California, Mexico. is an association of Mexican institutions, lead by Instituto de Astrofísica, Óptica y Electrónica and Astronomía Universidad Autónoma México, partnership with Smithsonian Astrophysical Observatory University Arizona's Department Astronomy Steward Observatory. currently planning design stage. Once completed, partners...
In an effort to optimize the hydrodynamic radial (HyDRa) polishing process for applications where amount of material that has be removed implies long times, we have developed a method determine optimum correction fraction made given error map, in terms level determinism process, number iterations, and their associated runs as well run times.
Abstract We present the design of a stellar spectropolarimeter to measure magnetic field point sources. The polarization module interfaces Boller and Chivens (B&Ch) intermediate-low resolution (R ~ 500 − 4000) spectrograph 2.1-m telescope San Pedro Martir National Astronomical Observatory in Mexico. uses Savart plate split beam into two orthogonal states quarter (half) waveplate circular (linear) polarization. is mounted it feeds through set four fibers, for polarized star images...
A method adding phase-shifting capacity in two mutually perpendicular axes to the Ronchi test is presented this work. The phase of object with position reflected ray on grating was identified and used solve equation reflection orthogonal directions. In manner, test-surface figure obtained. procedure demonstrated an inverse qualitative a direct, quantitative test. Both tests give results comparable Fizeau interferometry, precision order 25 nm peak valley. This technique good alternative...
We present the development of software to control multichannel image acquisition process and design an external timing module (ETM) for OPTICAM system [1]. The ETM is used generate high-speed synchronized pulses OPTICAM’s three different sCMOS cameras based on ESP32-S2 micro-controller. graphical user interface (GUI) this instrument also described, which allows users enter configuration parameters observations execute actions such as starting stopping sequences or initializing cameras. 3...
In this paper, an optical design is presented for anastigmatic telescope with back focal length corrected exact ray tracing to eliminate spherical, coma, and astigmatism aberrations. The formed of three conical mirrors, two them polished on the same substratum. divided into stages: we began obtaining Gaussian parameters in a first-order solution; posteriorly, were obtained analytically mirrors' asphericity third-order design. final stage consists implementation Fermat's principle, Abbe sine...
Using standard optical shop equipment, it is possible to implement simple, low-cost, phase-shifting Newton interferometers sufficiently accurate for surface evaluation. The simplification of the mechanism compensated with image-processing algorithms that can deal vibrations and uneven, nonsequential steps. results are cross-compared a Fizeau interferometer verify effectiveness method.