Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Latest By
Category:
Armor
Artificial
Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual
Person
Warfare
Weapon
Work
"in 1974 I experienced an invasion of my mind by a transcendentally rational mind, as if I had been insane all my life and suddenly I had become sane."
- Philip K. Dick
 |
| Photo-Electric Mosaic | ||
| A means of capturing astronomical images. |
| James Weldon has succeeded, and succeeded amazingly. He has concentrated
in his instrument the light-gathering
properties of literally billions of infinitesimal photo-electric cells.
“He took a sheet of an electronegative alloy of his own contriving and, by a most ingenious process, deposited upon it ultramicroscopic globules of silver, each so tiny that its diameter is less than a single wave length of light. Silver is, of course, electropositive. Accordingly, when a beam of light falls upon this mosaic, a small electrical charge is built up on each of the countless little globules of deposited silver. Condensers store up these charges, which are directly proportional to the intensity of the original light beam, and the silver globule pattern thus formed represents an electrical image of the source of illumination. “An electronic scanning beam, so narrow it covers only a single one of the ultramicroscopic silver beads at a time, sweeps at tremendous speed over the mosaic. This has the effect of discharging the silver-alloy photo-electric cells one by one, and releasing, simultaneously, the condenser charges. A current passes from the condenser, is stepped up and amplified enormously in like fashion, as in radio communication, and a visual image is reproduced in the form of light waves by another electronic beam and fluorescent screen. This magnification alone had been set at ten thousand times. “Think of it ! Add this increase to the original magnification of the powerful 300-inch mirror on which the light from the distant stars has fallen, and you have a total magnification which runs to an incredible figure.” |
| Technovelgy from Beyond Which Limits,
by Nat Schachner. Published by Astounding Science Fiction in 1937 Additional resources -
|
The photoelectric mosaic idea was filed by Vladimir Zworykin in 1930 as a television camera element; the patent wasn't granted until 1941. Schachner can always be relied upon to multiply size and resolution to, well, astronomical proportions. Using it as a way to get astronomical images anticipates the use of CCDs, charge-coupled devices, which were not introduced until 1969.
Science fiction authors were quick to pounce on the photoelectric devices that started appearing in the 1930's; take a look at the Photoelectric Telescope (Photoelectric Eyes) from The Cometeers (1936) by Jack Williamson and the Photoelectric Course Warning from Out Around Rigel (1931) by Robert H. Wilson.
Comment/Join this discussion ( 0 ) | RSS/XML | Blog This |
Additional
resources:
More Ideas
and Technology from Beyond Which Limits
More Ideas
and Technology by Nat Schachner
Tech news articles related to Beyond Which Limits
Tech news articles related to works by Nat Schachner
| Will Space Stations Have Large Interior Spaces Again? |
| Reflect Orbital Offers 'Sunlight on Demand' And Light Pollution |
| Chrysalis Generation Ship to Alpha Centauri |
| The First Space Warship For Space Force |
Want to Contribute an
Item?
It's easy:
Get the name of the item, a
quote, the book's name and the author's name, and Add
it here.
| <Previous | Next> |
|
|
|
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Science Fiction Invention Timeline, or see what's New.
|
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
'The observation vehicle was of that peculiar variety used in conveying a large number of people across rough terrain.'
'The real border was defended by... a swarm of quasi-independent aerostats.'
'I ... set my automatic astronomical instruments to searching for a habitable planet.'
'...haven't you a section of the factory where only robot labor is employed?'
'... oblongs were all over the floor and surfaces.'
