No matter how good your smartphone camera is, it can show you only a fraction of the detail Alex Hegyi can with the one he's built at Xerox's PARC in Palo Alto, California. That's because Hegyi's camera also records parts of the spectrum of light that you can't see. Since Hegyi's camera logs a wider range of wavelengths, it can be used for everything from checking produce at the grocery store (fruits increasingly absorb certain wavelengths as they ripen) to spotting counterfeit drugs (the real ones reflect a distinctive pattern). In the near future, Hegyi hopes, his technology can be added to smartphone cameras, so anyone can make and use apps that harness so-called hyperspectral imaging. Such systems have been around for years, but they have been big and expensive, limiting them to non-consumer applications like surveillance and quality control for food and drugs.
If you've ever wondered what it might be like to pass through a rainbow, then read on. A YouTuber has filmed a first-person perspective of his camera passing through a spectrum of visible light. Uploaded by JBirdx665, the video shows the resulting rainbow from sunlight refracting through a window and onto the camera of an iPhone. A YouTuber has filmed a first-person perspective of his camera passing through a spectrum of visible light. JBirdx665 wrote: 'Decided to point my phones (sic) camera at the source of the rainbow/prism.
It is important to note that the sensitivity of the circadian system is tuned toward shorter wavelengths (bluish light), specifically in the range of 460–480 nm. Sunlight reaching Earth is composed mostly of short wavelengths during midday, but those wavelengths become scattered at dusk, when the sun approaches the horizon, causing red wavelengths to predominate. Artificial lights produce different spectrums, depending on the type, but virtually all of our electronic devices (TVs, computer screens, smart phones, tablets, eReaders) emit mostly short wavelength light. Choosing a lighting system with an appropriate spectral distribution, or filtering light to achieve such a distribution, can minimize disruption to the circadian system. For example, using redshifted lighting at night may be beneficial for humans and other mammals, whereas broad-spectrum light is appropriate for daytime indoor lighting.
Its maker says it offers science, not magic, to facilitate a better night's sleep. According to the manufacturer: Harnessing light wavelengths to regulate melatonin, the hormones that orchestrate sleep cycles. Before rest, users touch the lamp to begin the 20-minute pre-sleep process: The lamp glows red, indicating long light wavelengths to encourage secretion of melatonin, then gradually darkens. Apps to regulate your sleep Deep sleepers Can't keep off the pounds? Throughout the night, Aura tracks room temperature, decibel levels and available light.