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Visual Problems of Space Travel (1962) / Chapter Skim
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Additional Problems Related to Space Flight
Pages 24-28

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From page 24...
... Additional Visual Problems Related to Space Flight There are several visual problems that do not fall conveniently into any of the preceding sectiona.
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From page 25...
... Therefore, when the astronaut fails to respond to a visual warning signal, an auditory back-up signal could be utilized in extreme emergencies. In addition, it may be desirable to have occasional simulated emergencies which are either rare or of an unexpected nature.
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From page 26...
... Visual acuity is not a limiting factor in this case. Visibility will be limited solely by the amount of available energy in the visible range reflected from the target, [in the event, however, that the relative positions of the two vehicles are such that the object to be sighted is not markedly brighter, the problem may be extremely difficult.]
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From page 27...
... Inasmuch as all such reports were falae, it suggests that the probability of detection of a space vehicle whose reflected light is similar to various stars in the background will be very low unless high-intensity light sources or reflectors are employed. It would seem also that any such light sources or reflectors should be designed with respect to frequency and wave length so as to present a signal that is easily distinguishable from the background.
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From page 28...
... Although motion perception has been studied extensively by numerous investigators, very little work has been done in which the test objects were systematically viewed against a homogeneous background, either empty or uniformly patterned. Several pertinent experiments, however, were conducted by Duncker (1929)
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Key Terms

  • visual field
  • space vehicle
  • relative motion
  • totally dark
  • light sources

  • ludvigh concerns
  • atmospheric dispersion
  • visual fields
  • field myopia
  • studied extensively

  • normally accustomed
  • test objects
  • ago whiteside
  • extreme emergencies
  • flight outside

  • routine operations
  • work concerns
  • occasional simulated
  • actual amount
  • permit constant

  • visual warning
  • ample cues
  • relative size
  • limited solely
  • utilized continuously

  • empty field
  • parameters involved
  • constant visibility
  • fall conveniently
  • empty visual


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