Design Tailoring of Microstructured Fibers for All-Fiber Mid-IR Light Sources through Wavelength Translation

2013 ◽  
Author(s):  
Ajanta Barh ◽  
Somnath Ghosh ◽  
R. K. Varshney ◽  
Bishnu P. Pal
Keyword(s):  
Light Sources ◽  
Microstructured Fibers ◽  
Wavelength Translation ◽  
Ir Light

Light-assisted drying (LAD) of small volume biologics: a comparison of two IR light sources

2016 ◽  
Author(s):  
Madison A. Young ◽  
Matthew Van Vorst ◽  
Gloria D. Elliott ◽  
Susan R. Trammell
Keyword(s):  
Small Volume ◽  
Light Sources ◽  
Ir Light

scholarly journals Investigation on optical integration between LED Mid-IR light sources and Si-based waveguides for sensing applications

2021 ◽  
Vol 2145 (1) ◽  
pp. 012056
Author(s):  
Pawaphat Jaturaphagorn ◽  
Papichaya Chaisakul ◽  
Nattaporn Chattham ◽  
Pichet Limsuwan
Keyword(s):  
Integrated Circuits ◽  
Light Source ◽  
Light Emitting Diode ◽  
Coupling Scheme ◽  
Light Sources ◽  
Optical Coupling ◽  
Led Light ◽  
Carbon Dioxide Gas ◽  
Sensing Applications ◽  
Ir Light

Abstract Research on mid-IR silicon-based waveguides has recently received strong interest. Particularly, this paper focuses on one of the critical issues in micron-scale photonic integrated circuits, which is to efficiently couple a mid-IR LED (light emitting diode) light source to an external micron-scale waveguide. The optical coupling scheme is crucial for the exploitation of LED light sources in waveguide-based spectroscopic sensing applications. This paper reports optical coupling scheme between an LED mid-IR light source and a silicon rich silicon nitride (SiN) waveguide that could enable the use of LED-based light sources. Finally, the detection limit of the investigated device for carbon dioxide gas detection is calculated.

Safety Issues and Infrared Light

2012 ◽  
pp. 336-358 ◽  
Author(s):  
Fiona Mulvey ◽  
Arantxa Villanueva ◽  
David Sliney ◽  
Robert Lange ◽  
Michael Donegan
Keyword(s):  
Eye Tracking ◽  
Infrared Light ◽  
Light Sources ◽  
Continuous Exposure ◽  
Eye Tracker ◽  
Tracking Systems ◽  
Safety Issues ◽  
Safety Standards ◽  
Test House ◽  
Ir Light

Infrared light is the most common choice for illumination of the eye in current eye trackers, usually produced via IR light-emitting diodes (LEDs). This chapter provides an overview of the potential hazards of over-exposure to infrared light, the safety standards currently in place, configurations and lighting conditions employed by various eye tracking systems, the basics of measurement of IR light sources in eye trackers, and special considerations associated with continuous exposure in the case of gaze control for communication and disabled users. It should be emphasised that any eye tracker intended for production should undergo testing by qualified professionals at a recognised test house, in a controlled laboratory setting. However, some knowledge of the measurement procedures and issues involved should be useful to designers and users of eye tracking systems.

Safety Issues and Infrared Light

2013 ◽  
pp. 1062-1083
Author(s):  
Fiona Mulvey ◽  
Arantxa Villanueva ◽  
David Sliney ◽  
Robert Lange ◽  
Michael Donegan
Keyword(s):  
Eye Tracking ◽  
Infrared Light ◽  
Light Sources ◽  
Continuous Exposure ◽  
Eye Tracker ◽  
Tracking Systems ◽  
Safety Issues ◽  
Safety Standards ◽  
Test House ◽  
Ir Light

Infrared light is the most common choice for illumination of the eye in current eye trackers, usually produced via IR light-emitting diodes (LEDs). This chapter provides an overview of the potential hazards of over-exposure to infrared light, the safety standards currently in place, configurations and lighting conditions employed by various eye tracking systems, the basics of measurement of IR light sources in eye trackers, and special considerations associated with continuous exposure in the case of gaze control for communication and disabled users. It should be emphasised that any eye tracker intended for production should undergo testing by qualified professionals at a recognised test house, in a controlled laboratory setting. However, some knowledge of the measurement procedures and issues involved should be useful to designers and users of eye tracking systems.

Optical Touch Sensing on Nonparametric Rear-Projection Surfaces for Interactive Physical-Virtual Experiences

2016 ◽  
Vol 25 (1) ◽  
pp. 33-46 ◽  
Author(s):  
Jason Hochreiter ◽  
Salam Daher ◽  
Arjun Nagendran ◽  
Laura Gonzalez ◽  
Greg Welch
Keyword(s):  
Medical Training ◽  
Light Sources ◽  
Visual Responses ◽  
Hands On ◽  
Tightly Coupled ◽  
Projection Surface ◽  
Virtual Experiences ◽  
Detection And Localization ◽  
Ir Light ◽  
Rear Projection

We demonstrate a generalizable method for unified multitouch detection and response on various nonparametric and parametric surfaces to support interactive physical-virtual experiences. The method employs multiple infrared (IR) cameras, one or more projectors, IR light sources, and a rear-projection surface. IR light reflected off human fingers is captured by cameras with matched IR pass filters, allowing for the detection and localization of multiple simultaneous finger-touch events. The processing of these events is tightly coupled with the rendering system to produce auditory and visual responses displayed on the surface using the projector(s) to achieve a responsive, interactive, physical–virtual experience. We demonstrate the method on two nonparametric face-shaped surfaces and a planar surface. We also illustrate the approach's applicability in an interactive medical training scenario using one of the head surfaces to support hands-on, touch-sensitive medical training with dynamic physical–virtual patient behavior.

scholarly journals Outdoor Target Positioning Using Wii Remote IR Camera and Signal Modulation

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2163
Author(s):  
Michael Lin ◽  
Kooktae Lee
Keyword(s):  
Infrared Camera ◽  
Weather Conditions ◽  
Frame Rate ◽  
Light Sources ◽  
Signal Modulation ◽  
Ir Camera ◽  
Obvious Reason ◽  
Capability Of Detection ◽  
Sunny Weather ◽  
Ir Light

This paper investigates the use of the Wii remote IR (infrared) camera for outdoor target positioning. The Wii remote IR camera is widely used in various applications because of its capability of detection of up to four IR light sources with a fast frame rate (100 Hz) and a relatively low price. However, previous applications are limited to indoor uses due to the obvious reason of sunlight interference for outdoor applications. In this paper, a signal modulation technique is introduced, which enables the IR camera to look for a particular pattern encoded in an IR beacon. In this way, the IR camera can distinguish the IR beacon from the sunlight interference. The irradiance of the sunlight reflection is also analyzed to guarantee that the IR camera can detect the IR beacon even under extremely sunny weather conditions. As the Wii remote IR camera sensor is overloaded under an extremely bright condition that blocks the camera to see any light sources, we propose the use of a filter to dim the camera. Experimental results for outdoor tests are provided to validate the proposed methods.

High-Q microresonators for mid-IR light sources and molecular sensors

2012 ◽  
Vol 37 (21) ◽  
pp. 4389 ◽  
Author(s):  
Brandyn Way ◽  
Ravinder K. Jain ◽  
Mani Hossein-Zadeh
Keyword(s):  
Light Sources ◽  
Molecular Sensors ◽  
High Q ◽  
Ir Light

A novel 2-D mapping-based remote eye gaze tracking method using two IR light sources

2015 ◽  
Author(s):  
Yong-Goo Shin ◽  
Kang-A Choi ◽  
Sung-Tae Kim ◽  
Cheol-Hwan Yoo ◽  
Sung-Jea Ko
Keyword(s):  
Eye Gaze ◽  
Light Sources ◽  
Gaze Tracking ◽  
Tracking Method ◽  
Ir Light

Spatially Resolved Photoelectron Spectroscopy: Recent Progress and Future Plans

1990 ◽  
Vol 48 (2) ◽  
pp. 388-389
Author(s):  
A. M. Bradshaw
Keyword(s):  
Photoelectron Spectroscopy ◽  
Chemical Reactivity ◽  
Target Material ◽  
Orbital Energy ◽  
Light Sources ◽  
Analytical Technique ◽  
Hartree Fock ◽  
Spatially Resolved ◽  
Koopmans Theorem ◽  
Surface Analytical Technique

X-ray photoelectron spectroscopy (XPS or ESCA) was not developed by Siegbahn and co-workers as a surface analytical technique, but rather as a general probe of electronic structure and chemical reactivity. The method is based on the phenomenon of photoionisation: The absorption of monochromatic radiation in the target material (free atoms, molecules, solids or liquids) causes electrons to be injected into the vacuum continuum. Pseudo-monochromatic laboratory light sources (e.g. AlKα) have mostly been used hitherto for this excitation; in recent years synchrotron radiation has become increasingly important. A kinetic energy analysis of the so-called photoelectrons gives rise to a spectrum which consists of a series of lines corresponding to each discrete core and valence level of the system. The measured binding energy, EB, given by EB = hv−EK, where EK is the kineticenergy relative to the vacuum level, may be equated with the orbital energy derived from a Hartree-Fock SCF calculation of the system under consideration (Koopmans theorem).

Tandem scanning confocal light microscopy as compared with x-ray diffraction for characterizing the behavior of clays in fluid-saturated petroleum reservoir rock

1989 ◽  
Vol 47 ◽  
pp. 148-149
Author(s):  
C.J. Stuart ◽  
B.E. Viani ◽  
J. Walker ◽  
T.H. Levesque
Keyword(s):  
Light Microscopy ◽  
Image Plane ◽  
Reservoir Rock ◽  
Depth Of Field ◽  
Objective Lens ◽  
Scanning System ◽  
Light Sources ◽  
Petroleum Reservoir ◽  
Image Recording ◽  
Scan Speed

Many techniques of imaging used to characterize petroleum reservoir rocks are applied to dehydrated specimens. In order to directly study behavior of fines in reservoir rock at conditions similar to those found in-situ these materials need to be characterized in a fluid saturated state.Standard light microscopy can be used on wet specimens but depth of field and focus cannot be obtained; by using the Tandem Scanning Confocal Microscope (TSM) images can be produced from thin focused layers with high contrast and resolution. Optical sectioning and extended focus images are then produced with the microscope. The TSM uses reflected light, bulk specimens, and wet samples as opposed to thin section analysis used in standard light microscopy. The TSM also has additional advantages: the high scan speed, the ability to use a variety of light sources to produce real color images, and the simple, small size scanning system. The TSM has frame rates in excess of normal TV rates with many more lines of resolution. This is accomplished by incorporating a method of parallel image scanning and detection. The parallel scanning in the TSM is accomplished by means of multiple apertures in a disk which is positioned in the intermediate image plane of the objective lens. Thousands of apertures are distributed in an annulus, so that as the disk is spun, the specimen is illuminated simultaneously by a large number of scanning beams with uniform illumination. The high frame speeds greatly simplify the task of image recording since any of the normally used devices such as photographic cameras, normal or low light TV cameras, VCR or optical disks can be used without modification. Any frame store device compatible with a standard TV camera may be used to digitize TSM images.

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