INDIRECT VISIBILITY OF MIRRORS HAS CONVENTIONALLY BEEN MEASURED ACCORDING TO AN AREA OF VISION AND THERE HAVE BEEN NO APPROPRIATE METHODS TO EVALUATE A DEGREE OF VISUAL COGNIZANCE. THIS PAPER DEALS WITH A CONCRETE EVALUATION OF THE VISIBILITY OF THE MIRROR BASED ON THE CHANGEABILITY OF BASIC AREA AND A RATE OF IMAGE DISTORTION. AN EVALUATION BETTER THAN THE THIRD LEVEL IN THE FIVE RANKS OF EVALUATION SCALE CAN HARDLY BE HOPED FOR WITH THE PRESENT OUTSIDE-CROSS-VIEW-MIRROR ON CURRENT HEAVY-DUTY TRUCKS IN JAPAN. TO IMPROVE SUCH SITUATION, WE HAVE DEVELOPED A PERISCOPE MIRROR SYSTEM AND SUCCEEDED IN DECREASING A NUMBER ON THE LEFT SIDE OF CONFIRMING MIRRORS (FROM 3 TO 2) AND ACHIEVED THE BEST EVALUATION (5TH LEVEL).(A) FOR THE COVERING ABSTRACT OF THE CONFERENCE SEE IRRD 802816.
Samenvatting