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,知名偏光鏡品牌保護(hu)效(xiao)果更好(hao)。太陽(yang)鏡只是利用(yong)減光(guang)(guang)(guang)的作(zuo)用(yong),降低了有(you)害光(guang)(guang)(guang)線的強度,并沒有(you)阻(zu)隔有(you)害光(guang)(guang)(guang)線。偏(pian)光(guang)(guang)(guang)眼(yan)鏡可(ke)以完全阻(zu)隔散射、曲折和反射等各種因素造成的刺眼(yan)眩光(guang)(guang)(guang),即使長期從事(shi)強光(guang)(guang)(guang)活動,眼(yan)睛也(ye)可(ke)以得到保護(hu)。偏(pian)光(guang)(guang)(guang)鏡含有(you)偏(pian)光(guang)(guang)(guang)夾片,能夠(gou)解決近視(shi)問題,而太陽(yang)鏡沒有(you)此優勢。
如何分辨普通太陽鏡片和偏光鏡片
辨別偏(pian)光(guang)(guang)鏡(jing)的方(fang)法很多,其(qi)中比較簡(jian)單(dan)的一個就是:將兩片(pian)(pian)(pian)偏(pian)光(guang)(guang)鏡(jing)片(pian)(pian)(pian)垂(chui)直疊放(fang),鏡(jing)片(pian)(pian)(pian)將會出現不透(tou)光(guang)(guang)現象。原因是偏(pian)光(guang)(guang)鏡(jing)鏡(jing)片(pian)(pian)(pian)特殊設計只讓平行的光(guang)(guang)通過(guo)鏡(jing)片(pian)(pian)(pian),在兩鏡(jing)片(pian)(pian)(pian)垂(chui)直疊放(fang)時(shi)則光(guang)(guang)線大(da)部分被阻擋。大(da)家在購買(mai)時(shi),只要(yao)如此一個簡(jian)單(dan)的操作,便立刻(ke)可以知道產品的真偽及好壞了。
偏光鏡的作用
偏光鏡的(de)特效就是有效地排(pai)除(chu)和濾除(chu)光束中的(de)散射光線。使(shi)光線能于正(zheng)軌之透光軸投入(ru)眼睛視覺影像,使(shi)視野清(qing)晰(xi)自(zi)然。有如(ru)百葉(xie)窗簾的(de)原理(li),光線被調整成同向光而(er)進入(ru)室內,自(zi)然使(shi)景(jing)物看起來柔和而(er)不刺眼。
偏光鏡原理
偏光(guang)(guang)(guang)(guang)鏡(jing)(piān guāng jìng)是(shi)根據光(guang)(guang)(guang)(guang)線(xian)(xian)的(de)(de)偏振(zhen)原理制造的(de)(de)鏡(jing)片,用來排除和(he)(he)濾除光(guang)(guang)(guang)(guang)束中的(de)(de)直射光(guang)(guang)(guang)(guang)線(xian)(xian),使光(guang)(guang)(guang)(guang)線(xian)(xian)能(neng)于正軌之(zhi)透光(guang)(guang)(guang)(guang)軸(zhou)投入眼睛視覺影像,使視野(ye)清晰自然。多用于太陽鏡(jing)和(he)(he)照相機鏡(jing)頭。偏光(guang)(guang)(guang)(guang)鏡(jing)的(de)(de)工作原理是(shi)選擇(ze)性地過(guo)(guo)濾來自某個方向的(de)(de)光(guang)(guang)(guang)(guang)線(xian)(xian)。通過(guo)(guo)過(guo)(guo)濾掉(diao)漫反射中的(de)(de)許多偏振(zhen)光(guang)(guang)(guang)(guang),從而減弱天(tian)空中光(guang)(guang)(guang)(guang)線(xian)(xian)的(de)(de)強(qiang)度,把天(tian)空壓暗(an),并增加(jia)藍天(tian)和(he)(he)白云之(zhi)間(jian)的(de)(de)反差。具體實拍時(shi)(shi)要看著(zhu)取(qu)景器并旋轉(zhuan)前(qian)鏡(jing),取(qu)景器中天(tian)空最(zui)暗(an)時(shi)(shi)的(de)(de)效(xiao)果(guo)最(zui)明顯,最(zui)暗(an)與最(zui)亮相差90度。你可根據需要轉(zhuan)到最(zui)暗(an)與最(zui)亮間(jian)的(de)(de)任意角度。