Accession Number:

ADA061291

Title:

The Obscuration of Vision through Daytime Telescopes by External Coatings: Field Test Results.

Descriptive Note:

Final rept.,

Corporate Author:

HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Smyth,Christopher C.

Report Date:

1978-08-01

Pagination or Media Count:

78.0

Abstract:

The effectiveness of external coatings for obscuring vision through daytime telescopes was determined for four coating materials and three levels of area coverage. In a field test, subjects searched through a main gunners telescopic sight for panel targets emplaced on an outdoor range. Glass slides were placed in front of the objective lens to obscure vision. The slides had been coated with one of the four materials in one of three predetermined random patterns. The test showed that the material ranking in order of decreasing effectiveness is 1 green dye, 2 carbon black, 3 clear silicone base, and 4 aluminum pigment. The green dye was effective at 100 percent and 80 percent coverage, but ineffective at 30 percent. The carbon black was only effective at 100 percent coverage. Author

Descriptors:

• *OPTICAL COATINGS
• *OBSCURATION
• *TELESCOPIC GUN SIGHTS
• TRAINING
• ALUMINUM COATINGS
• FIELD TESTS
• DATA REDUCTION
• DYES
• SILICON COMPOUNDS
• PIGMENTS
• GREEN(COLOR)
• CARBON BLACK
• DAYLIGHT

Subject Categories:

• Coatings, Colorants and Finishes
• Fire Control and Bombing Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE