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"I long ago realized that I could reach far more people by writing something, than by walking down the street with a banner."
- John Brunner
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| Delayed Action Stereoscopic Principle | ||
| Distinguishing far off space craft by relative speed against the fixed stars. |
| But electromechanical vision has an advantage over bare sight; it is potentially able to discern lower angular speed than the eye. To the
eye, a spaceship any distance awayis a dot of light, and all dots of light
differ only in intensity, be they stars or spaceships. If the relative angular
speed of a ship against the stars is low, the eye will miss it. But an
instrument can be designed to detect it. The delayed-action stereoscopic
principle, long used in naval range finders and in asteroid-belt pilot alarms, had been built into the entire spread of view screens. If a dot
of light reproduced on a screen declined to hold steady, but progressed from cellet to cellet—relative angular movement—the gradient so established would trigger a circuit causing the moving dot to far outshine
its fellows, and with a color which ran down the spectrum according to the angular speed. All this if the pilot threw in the proper
test circuit.
Lazarus threw in the circuit. The high speed of the New Frontiers gave a long, effective base line for the pseudo-stereoscopy. Half a dozen dots of light obliged by glowing angry red, several times that number in other colors. He disregarded the rest, examined the half a dozen, running up the electronic magnification to the limit. None of them appeared to be on courses which would cross their own course ahead of them, or at all, for that matter. |
| Technovelgy from Methuselah's Children,
by Robert Heinlein. Published by Astounding Science-Fiction in 1941 Additional resources -
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'The pitiless M rays pierced Earth and steel and densest concrete as if they were so much transparent glass...'
'Pina2bo would have to operate full blast for many years to put as much SO2 into the stratosphere as its namesake had done in a few minutes.'
'Nanny is different,' Tom Fields murmured... 'she's not like a machine. She's like a person.'
'We made a crude , small cell and were delighted - and, I admit, somewhat surprised - to find it worked.'
'...we've promised him a generous pension from the royalties.'
'The clothes and jewelery drew their tiny power requirements from her movements.'
'At the end of each appendage's eight fingers there are tinier appendages...'
'We want to do something to help those who are suffering from tooth loss or absence,' said lead researcher Katsu Takahashi.
