Heliograph

A heliograph (Greek: ß╝ş╬╗╬╣╬┐¤é helios, meaning "sun", and ╬│¤ü╬▒¤ć╬Á╬╣╬Ż graphein, meaning "write") is a wireless solar telegraph that signals by flashes of sunlight (generally using Morse code) reflected by a mirror. The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter. The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century. Its main uses were military, survey and forest protection work. Heliographs were standard issue in the British and Australian armies until the 1960s, and were used by the Pakistani army as late as 1975. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video

TARGET AD 2
2014/11/17 Audiopedia   Share on Facebook

RELATED VIDEOS

Heliotrope aimer for Operation On-Target
Play Video

Heliotrope aimer for Operation On-Target

2015/09/20
Heliograph
Play Video

Heliograph

2011/06/10
Heliograph
Play Video

Heliograph

2010/12/02
Mance Mark V Heliograph Flyaround (Simplex Mode)
Play Video

Mance Mark V Heliograph Flyaround (Simplex Mode)

2013/08/18
Heliograph
Play Video

Heliograph

2011/12/22
Heliograph
Play Video

Heliograph

2013/03/03
heliograph.wmv
Play Video

heliograph.wmv

2012/05/17
"Mystery of Universe" Chris Zabriskie - Heliograph
Play Video

"Mystery of Universe" Chris Zabriskie - Heliograph

2015/11/09
Heliograph
Play Video

Heliograph

2015/02/20
Learn Morse Code Easily
Play Video

Learn Morse Code Easily

2010/11/19
1826 The First Photograph
Play Video

1826 The First Photograph

2009/03/25
VMARS Heliograph Demonstration 2
Play Video

VMARS Heliograph Demonstration 2

2010/11/02
Heliograph: Mance Mark V
Play Video

Heliograph: Mance Mark V

2012/01/29
Build Your Own Telegraph Key
Play Video

Build Your Own Telegraph Key

2011/04/20
Olaf Stuut & SQL - Heliograph (Traum 187)
Play Video

Olaf Stuut & SQL - Heliograph (Traum 187)

2015/03/06
Heliograph Leaf Print
Play Video

Heliograph Leaf Print

2015/06/08
Survival Kit must, Rescue Flash Signal Mirror with retro-reflective mil-spec aimer
Play Video

Survival Kit must, Rescue Flash Signal Mirror with retro-reflective mil-spec aimer

2010/08/16
Nic├ęphore Ni├ępce and the First Photograph from Nature   YouTube
Play Video

Nic├ęphore Ni├ępce and the First Photograph from Nature YouTube

2014/01/01
WHAT IS HELIOGRAPHY?
Play Video

WHAT IS HELIOGRAPHY?

2016/10/25
A signalman aboard a US ship underway at sea sending blinker signal at night in t...HD Stock Footage
Play Video

A signalman aboard a US ship underway at sea sending blinker signal at night in t...HD Stock Footage

2014/05/28
Heliograph: Mance Mark V HD
Play Video

Heliograph: Mance Mark V HD

2014/01/22
Heliograph
Play Video

Heliograph

2013/10/01
The First Photographer: The Photographs of Nic├ęphore Ni├ępce
Play Video

The First Photographer: The Photographs of Nic├ęphore Ni├ępce

2013/11/05
Heliograph (432 Hz) ~ Chris Zabriskie
Play Video

Heliograph (432 Hz) ~ Chris Zabriskie

2016/03/22
Powered by YouTube

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.