What is optics?
To a layman, it's just a piece of glass.
To a student, it's physics and chemistry.
To an optician, it's a piece of art.
To a designer, it's challenge and achievement.
To a scientist, it is a piece of aid.
And finally, don't be surprise that many users don't even know the existent of optics.
转摘自“焦点光学”
