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An Optical Device. How it Works  A Fresnel lens is made up of multiple prisms  These prisms bend and magnify light rays, creating a single concentrated.

Published byJohnathan Rich Modified over 9 years ago

Presentation on theme: "An Optical Device. How it Works  A Fresnel lens is made up of multiple prisms  These prisms bend and magnify light rays, creating a single concentrated."— Presentation transcript:

1 An Optical Device

2 How it Works  A Fresnel lens is made up of multiple prisms  These prisms bend and magnify light rays, creating a single concentrated beam of light Refer to the following website for more information

3 The Inventor  Augustin Fresnel, a French physicist developed the unique lens designed to produce parallel beams of light  The Fresnel lens was commonly used in lighthouses around the world

4 Notice the profile of the lens

5  A Fresnel lens used in a lighthouse  This lens takes on the appearance of a “beehive” and almost completely envelopes the light source  With a 1000 watt light bulb the concentrated beam produced from this lens can be seen in excess of 20 miles away