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"I think that self-limitation is the major limiting factor for most people in the world."
- Frank Herbert
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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. |
| From Methuselah's Children,
by Robert Heinlein. Published by Astounding Science-Fiction in 1941 Additional resources -
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'THE red tennis robot scooted desperately across the court...'
'The Consul remembered his first glimpse of the kilometer-long treeship...'
'Do you know what window washing used to cost by the hour?'
'Once the target is confirmed, it uses an IR laser to send a coded signal back to the parent, clearing it to attack.'
'I filled your bullet hole with flesh putty and the lattice.'
'... it will be easy to form an alphabet which shall enable us to converse with the inhabitants of the moon.'
'From the tower's huge octagonal base radiate wide silvery strips...'
'It was about five feet long... a black bullet head and red camera eyes.'
'The Law Society has strict rules on the use of pseudo-intelligent software...'
