A Directional Spotlight Baffle for Control Cabins,

Abstract

Direct overhead lighting in control cabins frequently gives rise to unwanted bright images of the luminaires in the windows and these images may degrade the cabin operator's view of the external world. Opaque louvres or shades and projector-type optical systems have commonly been used in attempts to overcome this difficulty with varying degrees of success. This report describes a directional baffle incorporating light traps which allow a high ratio of wanted to unwanted illumination from a specific conventional spotlamp. In practical tests, images from the spotlamp-baffle combination were practically inconspicuous both in day and night conditions. A general method of design is described for extension of the principle to other types of spotlamps. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1980
Accession Number
ADA106279

Entities

People

  • B. A. J. Clark
  • K. W. Anderson

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Behavioral Sciences
  • Brightness
  • Civil Aviation
  • Diffraction
  • Directional
  • Engineering
  • Equations
  • Geometry
  • Human Factors Engineering
  • Illumination
  • Light Sources
  • Materials
  • Measurement
  • Optical Phenomena
  • Optics
  • Orientation (Direction)
  • Specular Reflection

Fields of Study

  • Physics

Readers

  • Circadian Sleep-Wake Regulation and Chronobiology
  • Combustion and Flow Dynamics.
  • Human-Computer Interaction (HCI).