a lens知識摘要

Lens - Camerapedia
If you are looking for a specific lens, you can browse by lens, by lens maker or by lens mount... ... The combination of two convex lens elements made of crown glass with a concave one which is made of flint glass is known since 1765 as a means against ch

Google is developing a smart contact lens - Computerworld
Computerworld - Moving beyond Glass, Google is working on a smart contact lens that would use tiny chips, sensors and antennas to continuously test diabetics' blood sugar levels and make it easier for them to stay healthy. Google, which said the technolog