How are scratch resistant lenses used on Earth?

How are scratch resistant lenses used on Earth?

Scratch resistant lenses are use to replace glass and plastic lenses which scratch and break easily on eyeglasses. If someone was wearing eyeglasses made of glass lenses and something hit the lens then it would shatter and go in their eyes.

How did NASA make scratch resistant lenses?

The DiamondHard® technology involves coating the lenses with a film of diamond-like carbon (DLC) that not only provides scratch-protection but additionally reduces surface friction, so that the lenses shed water more easily to reduce spotting.

Why did NASA need scratch resistant lenses?

In space, there are a lot of particles and dirt that can easily damage space equipment. This is a problem since space equipment needs to be durable and clear vision is a necessity. NASA needed to develop a way to make the space equipment more scratch-resistant.

Are scratch resistant lenses really scratch resistant?

There’s no such thing as scratch “proof” lenses. (Even glass lenses can be scratched!) Scratches, while not likely to affect your lens performance, are an annoyance that can interfere with clear vision.

When did NASA scratch-resistant lenses?

1983
In 1983, Foster-Grant obtained a license from NASA for the scratch-resistant coating technology. The company combined its own technology with NASA’s and produced a superior lens.

Did NASA invent sunglasses?

NASA researchers picked up on the latter fact and used it to humans’ advantage. Their work ultimately led to the development of sunglasses that protect against eye damage by blocking out the most harmful wavelengths of solar radiation.

Who invented scratch-resistant glass?

Why/How was the scratch resistant lens discovered? Theodore Wydeven, a NASA scientist discovered a coating that was very tough while working on a project for water purification for spacecrafts. Then, NASA took the coating and put it on plastic lenses and space helmets.

How does scratch resistance work?

An anti-scratch coating, also known as a scratch-resistant coating, is a clear lens coating that reduces the appearance of hairline scratches, thus preventing minor scratches that can happen easily and impair vision.

Is wearing scratched glasses bad?

While a scratch on your glasses is certainly inconvenient and definitely distracting, it shouldn’t harm the optical system of the eye. However, it is possible that the damage or scratch could be distracting enough to end up causing headache or eye strain if left unattended.

What are scratch-resistant sunglasses made of?

There are sunglasses lenses made specifically to resist scratching. And most lenses today include a scratch-resistant coating. Polycarbonate and Trivex lenses are more impact-resistant than glass and plastic lenses, and both usually have a built-in scratch-resistant coating.

Would you need sunglasses on the moon?

Since looking at the moon with the naked eye is safe, you don’t need to wear special glasses, NASA explained. So no, you won’t go blind if you look directly at the lunar eclipse to see the beautiful red moon.

What is the history of scratch resistant lenses?

In 1983, Foster-Grant obtained a license from NASA for the scratch-resistant coating technology. The company combined its own technology with NASA’s and produced a superior lens. Their scratch-resistant lenses lasted, with normal wear, ten times longer than the most widely used plastic optical lenses, surpassing even glass.

Where did the idea for scratch-resistant coatings come from?

Some of the earliest research into effective scratch-resistant coatings for prescription and sunglass lenses drew from work done at Ames Research Center on coatings for astronaut helmet visors and plastic membranes used in water purification systems.

How scratch-resistant are RayRay-ban survivors Collection sunglasses?

Ray-Ban Survivors Collection sunglasses feature a coating that offers 10 times the scratch-resistance of conventional glass lenses.

Are glass sunglasses shatter-resistant?

For decades, ground and polished glass had been the preferred lens in the eyeglass industry. That changed in 1972 when the Food and Drug Administration issued a regulation that all sunglasses and prescription lenses must be shatter-resistant.