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target="_blank">后视é•?/a>的大ž®ã€åŽè§†é•œçš„曲率半径。这三个要素之间有一定的关系。当换向镜头的距¼›Õd’Œž®ºå¯¸ç›¸åŒæ—Óž¼Œé•œå¤´çš„曲率半径越ž®ï¼Œé•œå¤´åå°„的视野越大。当镜子的曲率半径相同时åQŒé•œå­çš„ž®ºå¯¸­‘Šå¤§åQŒé•œå­åž®„的视野­‘Šå¤§ã€‚但是,事物æ€ÀL˜¯æœ‰ä¸¤é‡æ€§çš„。镜子曲率半径越ž®ï¼Œè§†é‡Ž­‘Šå¤§åQŒå€’èžR镜片反射的物体变形程度越大。和镜子一æ øP¼Œ¾lå¸¸ä¼šå¼•èµ·å¸æœºçš„错觉ã€?</p> <br /> 从行车的角度来看åQŒå­˜åœ¨å›¾åƒå¤±çœŸçŽ‡çš„问题。按照行业标准,òq³é¢é•œçš„畸变率不应超˜q‡ç™¾åˆ†ä¹‹3åQŒå‡¸é¢é•œçš„畸变率不应­‘…过癑ֈ†ä¹?。要求不能反映扭曲的物理囑փã€‚因此,镜子的曲率半径有一个有限的范围。行业标准规定外镜曲率半径äؓR1200åQŒå†…镜曲率半径äؓ无穷å¤?òq³é¢é•?。同时倒èžR镜片也有反射率指标。反ž®„率­‘Šé«˜åQŒé•œå­åž®„的囑փ­‘Šæ¸…晰。反ž®„率与镜子内表面的反ž®„膜材料有关ã€?br /> <br /> 倒èžR镜片的反光膜一般是用银和铝做的åQŒåž®„率很小åQŒç™¾åˆ†ä¹‹80。高反射率在某些场合有副作用。比如晚上在后大灯下行驶æ—Óž¼Œè½¦å†…后视镜的反光会给é©ùN©¶å‘˜å¸¦æ¥åˆºçœ¼çš„感觉åQŒåª„响行车稳定。因此,车内后视镜一般采用棱镜,镜面òq›_¦åQŒä½†æˆªé¢å½¢çŠ¶ä¸ºæ£±é•œï¼Œåˆ©ç”¨‹‚±é•œè¡¨é¢åå°„率和内部反射率不同的特点åQŒè¾¾åˆ°æ— çœ©å…‰çš„要求。白天用反射率百分之80的银铝反光膜åQŒæ™šä¸Šç”¨åå°„率只有百分之4左右的表面玻璃。因此,只需在夜间稍微è{动日间位¾|®çš„车内后视镜ã€?br />    <span _fck_bookmark="1" style="display: none"> </span></p></div> 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