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- W638787231 abstract "REFLEX REFLECTORS ARE SPECIAL TYPES OF MIRRORS WHICH HAVE THE CHARACTERISTIC OF RETURNING A SUBSTANTIAL FRACTION OF THE INCIDENT LIGHT TOWARD THE SOURCE FROM WHICH IT ORIGINATES REGARDLESS OF THE INCIDENT ANGLE. BECAUSE OF THEIR PECULIAR OPTICAL CHARACTERISTICS, REFLEX REFLECTORS APPEAR VERY MUCH BRIGHTER THAN EVEN THE BEST OF WHITE PAINTS WHEN ILLUMINATED UNDER SIMILAR CONDITIONS AND ARE THUS VERY USEFUL IN MARKING ROADWAY OBSTACLES. A REVIEW OF THE VISUAL METHODS OF APPRAISAL HAS BEEN PREPARED TOGETHER WITH TYPICAL DATA SHOWING THE VARIATIONS FOUND WHEN THE HUMAN EYE IS USED AS A MEASURING INSTRUMENT. A PHOTO-ELECTRIC PHOTOMETER IS DESCRIBED WHICH PERMITS THE PHYSICAL MEASUREMENT OF THE LIGHT FLUX FROM REFLEX REFLECTORS WHEN THEY ARE USED UNDER CONDITIONS WHICH APPROXIMATE FIELD USAGE. DATA ARE SHOWN FOR THE CHANGES IN SPECIFIC INTENSITY WHEN THE DIFFERENT TYPES OF REFLECTORS ARE USED UNDER VARYING CONDITIONS OF DIVERGENCE ANGLE, ENTRANCE ANGLE, ORIENTATION ANGLE, TEST DISTANCE, SIZE OF LIGHT SOURCE, SIZE OF REFLECTOR, SIZE OF RECEIVER AND COLOR OF LIGHT SOURCE. A RECOMMENDED TEST PROCEDURE BASED UPON STANDARDIZED CONDITIONS IS OUTLINED. /AUTHOR/" @default.
- W638787231 created "2016-06-24" @default.
- W638787231 creator A5072912105 @default.
- W638787231 date "1951-01-01" @default.
- W638787231 modified "2023-09-23" @default.
- W638787231 title "REFLEX REFLECTOR PERFORMANCE CRITERIA" @default.
- W638787231 hasPublicationYear "1951" @default.
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