Flat lens

Although we are not familiar with the lens, we are taking photos with the smartphone but there are lenses. Camera lenses basically combine the light together into a single point. This lens is made using glass specialties. That's why the lens of the lens is slightly curved. But scientists were trying to make lenses with flat glass. The first successfully applied to it in 2012, a scientist at Harvard, Federico Capaso. He applied the wavelength of light and applied it. But his lens could only work with a color light. In the science magazine of February 2015, he showed a new way that it will work with all the color lights.
What is the need to straighten the baked lens for so much? That's exactly what you think If the lens is flat, then the cost of making our lenses will be very low. Even somewhere with ordinary plastic, today's work can be done as many expensive lenses. For the readers, there are some lenses in the world whose value is between millions and millions of taka. The reason for such a high price is that it is very difficult to make baked glasses. Looks like we can get a lens in front of which the surface is flat.