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

Protamine-DNA interaction

1978 ◽  
Vol 36 (2) ◽  
pp. 200-201
Author(s):  
D.P. Bazett-Jones ◽  
F.P. Ottensmeyer
Keyword(s):  
Small Volume ◽  
Double Helix ◽  
Dna Interaction ◽  
Dark Field ◽  
Sperm Head ◽  
Nuclear Proteins ◽  
Field Electron Microscopy ◽  
Dark Field Electron ◽  
Dna Double Helix ◽  
Positively Charged

Dark field electron microscopy has been used for the study of the structure of individual macromolecules with a resolution to at least the 5Å level. The use of this technique has been extended to the investigation of structure of interacting molecules, particularly the interaction between DNA and fish protamine, a class of basic nuclear proteins of molecular weight 4,000 daltons.Protamine, which is synthesized during spermatogenesis, binds to chromatin, displaces the somatic histones and wraps up the DNA to fit into the small volume of the sperm head. It has been proposed that protamine, existing as an extended polypeptide, winds around the minor groove of the DNA double helix, with protamine's positively-charged arginines lining up with the negatively-charged phosphates of DNA. However, viewing protamine as an extended protein is inconsistent with the results obtained in our laboratory.

The Theoretical Contrast in Scanning and Conventional High Resolution Microscopes

1969 ◽  
Vol 27 ◽  
pp. 170-171
Author(s):  
E. Zeitler ◽  
M. G. R. Thomson
Keyword(s):  
Small Volume ◽  
Volume Element ◽  
Optical Processing ◽  
Image Construction ◽  
Object Interaction ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Optical Treatment ◽  
Electron Microscopes ◽  
Intensity Contrast

In the formation of an image each small volume element of the object is correlated to an areal element in the image. The structure or detail of the object is represented by changes in intensity from element to element, and this variation of intensity (contrast) is determined by the interaction of the electrons with the specimen, and by the optical processing of the information-carrying electrons. Both conventional and scanning transmission electron microscopes form images which may be considered in this way, but the mechanism of image construction is very different in the two cases. Although the electron-object interaction is the same, the optical treatment differs.

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