To see our content at its best we recommend upgrading if you wish to continue using IE or using another browser such as Firefox, Safari or Google Chrome. Frescoes painted by Giotto, the 14th Century Italian master, have been brought to life with the use of ultraviolet technology. Special Effects FiltersAs you will see from the images later in this catalogue, HOYA makes it possible to add many different special effects to your pictures, such as starbursts, close-ups, softening and multi-images. Fresh whispers from the rumour mill suggest that Apple will implement a sun exposure warning feature into its upcoming iWatch, along with a tool for measuring blood oxygen levels. The speculation come courtesy of Barclays analyst Blayne Curtis, who believes that an ultraviolet (UV) light sensor from Texas-based Silicon Labs is likely to find its way into the iWatch.

While it might sound far fetched, we actually think there could be a decent amount of meat on these rumour bones.
For starters, a UV light detector is included, which means that the iWatch can track your sunlight exposure and warn you when you've had too much. We can imagine users entering their skin complexion into Apple's all-but-confirmed iOS 8 Healthbook app, setting a baseline for the sun exposure warning.
The sensors also include infrared (IR) sensors, which can be used to measure both heart rate and blood oxygen levels. We've already seen how this can be achieved in the Samsung Galaxy S5, Gear 2 and Gear Fit, and the principles in the iWatch would be exactly the same.

And as for oxygen levels - medical devices called pulse oximeters exist which have sensors that measure blood oxygen levels when placed over fingertips and earlobes. The sensors typically use a pair of LEDs - one with a red light wavelength and the other emitting infrared light.

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