偏光鏡好還是太陽鏡好
太陽鏡就是人們熟知用于遮擋陽光和紫外線的有色眼鏡,不能避免眩光對眼睛的傷害。而偏光鏡能徹底濾除眩光,達到對眼睛的真正保護,知名偏光鏡品牌保(bao)護效(xiao)果(guo)更好(hao)。太陽鏡(jing)(jing)只是(shi)利(li)用減光(guang)的作用,降低了有(you)害光(guang)線的強度,并沒有(you)阻隔有(you)害光(guang)線。偏(pian)光(guang)眼(yan)鏡(jing)(jing)可以(yi)(yi)完全阻隔散射(she)、曲折和反射(she)等各種因素造成的刺(ci)眼(yan)眩(xuan)光(guang),即使長期從事強光(guang)活動,眼(yan)睛(jing)也可以(yi)(yi)得到保(bao)護。偏(pian)光(guang)鏡(jing)(jing)含有(you)偏(pian)光(guang)夾片,能夠解(jie)決近視問題,而太陽鏡(jing)(jing)沒有(you)此優勢。
如何分辨普通太陽鏡片和偏光鏡片
辨別(bie)偏光(guang)(guang)(guang)鏡(jing)(jing)(jing)的(de)(de)方(fang)法很(hen)多,其中比較簡(jian)(jian)單的(de)(de)一(yi)個就是(shi):將兩片(pian)偏光(guang)(guang)(guang)鏡(jing)(jing)(jing)片(pian)垂(chui)直(zhi)疊放(fang)(fang),鏡(jing)(jing)(jing)片(pian)將會(hui)出現不透光(guang)(guang)(guang)現象。原(yuan)因是(shi)偏光(guang)(guang)(guang)鏡(jing)(jing)(jing)鏡(jing)(jing)(jing)片(pian)特殊設計只讓平行的(de)(de)光(guang)(guang)(guang)通過鏡(jing)(jing)(jing)片(pian),在兩鏡(jing)(jing)(jing)片(pian)垂(chui)直(zhi)疊放(fang)(fang)時則光(guang)(guang)(guang)線大(da)部(bu)分被阻擋。大(da)家在購買時,只要如此一(yi)個簡(jian)(jian)單的(de)(de)操作(zuo),便立刻(ke)可(ke)以知道產品的(de)(de)真(zhen)偽及好壞了。
偏光鏡的作用
偏光鏡的特效就(jiu)是有(you)效地排除(chu)和濾除(chu)光束(shu)中的散射光線。使光線能于正軌之透光軸投入(ru)(ru)眼睛視覺影像(xiang),使視野(ye)清晰自(zi)然(ran)(ran)。有(you)如百(bai)葉窗簾的原理,光線被調整成同向光而進入(ru)(ru)室內,自(zi)然(ran)(ran)使景物看起來(lai)柔(rou)和而不刺眼。
偏光鏡原理
偏(pian)光(guang)(guang)(guang)(guang)(guang)鏡(jing)(jing)(piān guāng jìng)是根(gen)據光(guang)(guang)(guang)(guang)(guang)線(xian)的(de)(de)偏(pian)振原(yuan)(yuan)理制造的(de)(de)鏡(jing)(jing)片(pian),用來排除和濾(lv)除光(guang)(guang)(guang)(guang)(guang)束中(zhong)的(de)(de)直(zhi)射光(guang)(guang)(guang)(guang)(guang)線(xian),使光(guang)(guang)(guang)(guang)(guang)線(xian)能于正軌之透光(guang)(guang)(guang)(guang)(guang)軸投入眼睛視覺影像,使視野清(qing)晰自然。多用于太陽鏡(jing)(jing)和照相機鏡(jing)(jing)頭(tou)。偏(pian)光(guang)(guang)(guang)(guang)(guang)鏡(jing)(jing)的(de)(de)工作原(yuan)(yuan)理是選擇(ze)性(xing)地過濾(lv)來自某個方向的(de)(de)光(guang)(guang)(guang)(guang)(guang)線(xian)。通過過濾(lv)掉漫反(fan)射中(zhong)的(de)(de)許多偏(pian)振光(guang)(guang)(guang)(guang)(guang),從而減(jian)弱天(tian)空(kong)中(zhong)光(guang)(guang)(guang)(guang)(guang)線(xian)的(de)(de)強度,把(ba)天(tian)空(kong)壓(ya)暗(an),并增加藍天(tian)和白云之間(jian)的(de)(de)反(fan)差。具體(ti)實拍時(shi)要(yao)看著取景器并旋轉前鏡(jing)(jing),取景器中(zhong)天(tian)空(kong)最暗(an)時(shi)的(de)(de)效(xiao)果最明(ming)顯,最暗(an)與(yu)(yu)最亮(liang)相差90度。你可根(gen)據需(xu)要(yao)轉到最暗(an)與(yu)(yu)最亮(liang)間(jian)的(de)(de)任意角度。