A PRELIMINARY STUDY OF A PROTECTIVE MASK LENS DESIGN TO REDUCE OCCLUSION OF VISUAL FIELD IN OPTICAL FIRE CONTROL INSTRUMENTS.
Technical memo. Apr-Aug 65,
CHEMICAL RESEARCH AND DEVELOPMENT LABS EDGEWOOD ARSENAL MD
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This report describes a preliminary human factors engineering study to resolve the incompatibility between optical fire control instruments and the M17 Protective Mask. The visual field of the instruments is reduced when the mask is worn because the critical distance from the cornea to the instrument lens is shorter than the distance from the cornea to the mask lens. A proposed recessed lens for the M17 mask is described. Limited tests of the modified lens indicate that the design reduces occlusion of the visual field of optical fire control instruments, is compatible with the mask, is capable of field installation, and has a potential for providing lenses. Author
- Human Factors Engineering and Man Machine Systems
- Protective Equipment