The Point Pinos Lighthouse in Pacific Grove marks its 170th anniversary with a day of festivities and historical activities.

This is the Corps that employed optical genius, Agustin-Jean Fresnel. Although some lighthouses were already using lenses, they weren’t using the special Fresnel-style lenses. There had been ...

225-pound antique Fresnel lens that's guarded by two security systems. You'll also learn about the lighthouse's past inhabitants, like Tommy, who became known as "Pomham Light's Diving Cat ...

stands at the top of the lighthouse next to its Fresnel lens. He has family ties to lighthouse keepers there, going all the way back to the late 1830s. Tom Sintes' ties to the Amelia Island ...

A first-order Fresnel lens made the light visible from nineteen miles at sea. It is now automated and still active. This lighthouse looks something like a candy cane without the curving top.

The tower is notable for its rare 9-foot-tall first-order Fresnel lens that can be seen from more than 20 nautical miles away. It's important to know that this lighthouse is only accessible by ...

Now that the Amelia Island Lighthouse beacon is back in operation ... This arrangement was replaced by a third-order Barbier Benard Fresnel lens in 1903, which is still used to this day." ...

Making a traditional glass lens requires a lot of experience, skill, and patience grinding a piece of glass to the required shape, and is not for the casual experimenter. Making a glass Fresnel ...

Government lighthouses at Rawley Point (also known ... The top lantern room was equipped with a third-order Fresnel lens, transferred from the original brick tower and installed on Nov. 20 ...