A PRELIMINARY STUDY OF A PROTECTIVE MASK LENS DESIGN TO REDUCE OCCLUSION OF VISUAL FIELD IN OPTICAL FIRE CONTROL INSTRUMENTS.

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Abstract:

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

Author(s):
Houff, Charles W.
Author Organization(s):
CHEMICAL RESEARCH AND DEVELOPMENT LABS EDGEWOOD ARSENAL MD
Descriptive Note:
Technical memo. Apr-Aug 65,
Annotation:
Protective mask lens design to reduce occlusion in optical fire control instruments.
Pagination:
0031

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
CRDL-TM-2-37
Task Number(s):
1C622401A0970802
Project Number(s):
DA-1C622401A097
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*PROTECTIVE MASK FACEPIECES, *VISUAL PERCEPTION, OPTIMIZATION, OPERATION, OPTICAL EQUIPMENT, FIRE CONTROL SYSTEMS, COMPATIBILITY, VISION, REDUCTION
Field(s)/Group(s):
Human Factors Engineering and Man Machine Systems, Protective Equipment
Keyword(s):
M 17 PROTECTIVE MASKS, M 9 PROTECTIVE MASKS
Report Date:
1965 Dec 01