A heliograph (from Ancient Greek ἥλιος (hḗlios) ' sun ' and γράφειν (gráphein) ' to write ') is a solar telegraph [1] system that signals by flashes of sunlight (generally using Morse code from the 1840s) reflected by a mirror.

…and engineer who invented the heliograph, a signaling device that employs two mirrors to gather sunlight and send it to a prearranged spot as a coded series of short and long flashes. Read More

Feb 6, 2017 · The heliograph, a mirrored instrument that could blink messages across great distances, was the latest in military communications technology, and this was the first time it had been used in a conflict.

In the vast realm of human communication, innovative methods have continually emerged to bridge distances and transmit messages across great expanses. One such fascinating technique is the heliograph, a device that utilizes flashes of sunlight reflected by a mirror to convey coded communications.

May 1, 2003 · The Heliograph was a simple but highly effective instrument for instantaneous optical communication over 50 miles or more in the 19th century. Its major uses were for military and survey work. It was still in serious use at least up to 1935, for example by Glubb Pasha's Arab Legion in Palestine.

DESCRIPTION: The heliograph was a communications device used to transmit messages over long distances. It uses a mirror attached to a surveying device to direct a beam of light to a receiving station. Sunlight is used as the light source. Messages could be sent in any direction during daylight hours.

The heliograph is a signalling appliance by which the sun's rays can be reflected by means of a mirror or mirrors. The mirror is actuated by a key. When the key s pressed, the mirror is moved so that the reflected ray is thrown towards the receiving station.

The meaning of HELIOGRAPH is an apparatus for telegraphing by means of the sun's rays flashed from a mirror.

Feb 4, 2013 · Before the telegraph there was the Heliograph, an instrument that reflected the sun's light to an observer at a distance. In Greek, helios, means "sun", and graphein, meaning "write. Its main uses were in the military (army and navy), survey and forest protection work.

May 29, 2018 · he·li·o·graph / ˈhēlēəˌgraf/ • n. 1. a signaling device by which sunlight is reflected in flashes from a movable mirror. ∎ a message sent in such a way; a heliogram. 2. a telescopic apparatus for photographing the sun. 3. hist.