New Thermometers Stick Like Temporary Tattoo

Using new wearable electronics as light and thin as temporary tattoos, scientists can now take a person's temperature and monitor not only their health but also their mental state.Taking a person's temperature can reveal more than a fever. For instance, analyzing tiny, regular variations in body temperature can reveal how blood vessels are constricting and dilating, which is linked to cardiovascular health. Monitoring changes in temperature can even shed light on a person's mental state.The best existing technologies for measuring skin temperature include simple, paste-on sensors and sophisticated infrared cameras. Although paste-on sensors are cheap and help doctors monitor patients as they move freely, these devices cannot monitor changes in great detail, across the skin. Moreover, they irritate the skin, changing its natural responses. While infrared cameras enable high-precision temperature measurements in high detail across the skin, they are expensive, and require patients to keep still.This wearable thermometer may give better readings of temperature across the skin.

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OPTICAL CAMOUFLAGE TECHNOLOGY

OPTICAL CAMOUFLAGE TECHNOLOGY

What is an Optical Camouflage?

Optical Camouflage is a technology which allows an object to blend into the surrounding using optical technologies and has potential to achieve perfect concealment from visual detection. It is a kind of active camouflage which completely envelopes the wearer. It displays an image of the scene on the side opposite to the viewer on it, so that the viewer can “see through” the wearer, rendering the wearer invisible.

 Light Surface Reflectivity:

·         In beaded surface the reflected light rays travel back along the same path as the incident rays which is known as retro

 

How does it work?

       A digital video camera captures the scene behind the person wearing the cloak. The computer processes the captured image and makes the calculations necessary to adjust the still image or video so it will look realistic when it is projected. The projector receives the enhanced image from the computer and shines the image through a pinhole-sized opening onto the combiner. The silvered half of the mirror, which is completely reflective, bounces the projected image towards the person wearing the cloak. The cloak acts like a movie screen, reflecting light directly back to the source, which in this case is mirror. Light rays bouncing off of the cloak pass through the transparent part of the mirror and fall on the user’s eyes. Remember that the light rays bouncing off of the cloak contain the image of the scene that exists behind the person wearing the cloak. The person wearing the cloak appears invisible because the background screen is being displayed onto the retro-reflective material. At the same time, light rays from the rest of the world are allowed to reach the user’s eye, making it seem as if an invisible person exists in an otherwise normal looking world.

Application:

• Used in Stealth technology, to make airplane invisible to Radar.
•   Doctor performing surgery could use optical camouflage technique to see through their hands and instruments to the underlying tissue.
• Predator, Iron man, James Bond[die another day] Movies and Video games.