近幾(ji)年,入室偷(tou)(tou)盜(dao)(dao)率(lv)頻頻高升(sheng),而其中有(you)一(yi)部分家庭被盜(dao)(dao)竟(jing)是因為盜(dao)(dao)賊撬(qiao)開(kai)了防(fang)(fang)火門(men)(men)鏡之后(hou)進行偷(tou)(tou)盜(dao)(dao)的(de)(de)事件。這不(bu)得(de)不(bu)讓(rang)我們發人深思,小(xiao)小(xiao)的(de)(de)防(fang)(fang)火門(men)(men)鏡竟(jing)然會引發偷(tou)(tou)盜(dao)(dao)案件。因而,許多朋(peng)友就想到要換掉防(fang)(fang)盜(dao)(dao)門(men)(men)本來(lai)自帶的(de)(de)貓(mao)眼,裝置個(ge)帶有(you)防(fang)(fang)護器的(de)(de)貓(mao)眼。那(nei)么,從防(fang)(fang)盜(dao)(dao)門(men)(men)安全(quan)常識(shi)的(de)(de)視點來(lai)說,究(jiu)竟(jing)防(fang)(fang)盜(dao)(dao)門(men)(men)的(de)(de)防(fang)(fang)火門(men)(men)鏡能夠拆(chai)嗎? 拆(chai)貓(mao)眼很簡單(dan),打(da)開(kai)門(men)(men),用一(yi)只手壓住固……
銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)反窺鏡(jing)(jing)(jing)(jing):也(ye)叫(jiao)反銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)觀(guan)察鏡(jing)(jing)(jing)(jing)/反銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)監視器等,是一種專(zhuan)門(men)(men)(men)(men)針對(dui)“銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)”規(gui)劃的(de)窺探東西(xi),它能夠通過“銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)”從門(men)(men)(men)(men)外窺探室(shi)內情況。借助反銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)在自然光(guang)下,室(shi)內所有一切都能用肉眼看到,分(fen)量(liang)還十(shi)分(fen)輕,鏡(jing)(jing)(jing)(jing)筒小巧,掌心(xin)完全(quan)能夠覆蓋,放(fang)在腰帶、口袋或背心(xin)上(shang)都行(xing),也(ye)能夠扣(kou)在鑰匙(chi)鏈(lian)上(shang)。 銅(tong)(tong)(tong)(tong)門(men)(men)(men)(men)鏡(jing)(jing)(jing)(jing)反窺鏡(jing)(jing)(jing)(jing)外觀(guan)根本(ben)相同:長度十(shi)多厘米,兩邊(bian)是玻璃(li)鏡(jing)(jing)(jing)(jing)……
“防火門(men)(men)鏡(jing)”是(shi)由(you)兩塊(kuai)透(tou)鏡(jing)組合而成(cheng).當我(wo)們從(cong)門(men)(men)內(nei)向外看時,物鏡(jing)L1是(shi)凹透(tou)鏡(jing),目(mu)鏡(jing)L2是(shi)凸透(tou)鏡(jing).物鏡(jing)L1的(de)(de)(de)(de)焦(jiao)距極短,它將室外的(de)(de)(de)(de)人(ren)或(huo)物AB成(cheng)一(yi)縮得很小的(de)(de)(de)(de)正(zheng)立虛像A′B′,此像正(zheng)好落在目(mu)鏡(jing)L2的(de)(de)(de)(de)榜首(shou)焦(jiao)點之內(nei),L2起著(zhu)擴(kuo)大鏡(jing)的(de)(de)(de)(de)效果,最終得到一(yi)個較為(wei)擴(kuo)大的(de)(de)(de)(de)正(zheng)立虛像A〃B〃,此像恰又成(cheng)在人(ren)眼(yan)的(de)(de)(de)(de)明視距離附近,對于門(men)(men)外的(de)(de)(de)(de)情況(kuang),就看得清楚了. 那么(me)……
身(shen)居樓房或是宅院里(li)的(de)(de)住戶大(da)多(duo)都在房門上(shang)裝有防(fang)火門鏡(jing)(jing),人們也將其俗稱為(wei)(wei)“貓眼(yan)”,出于對自家安(an)全方面的(de)(de)考慮,當遇到作為(wei)(wei)不(bu)速之(zhi)客來(lai)臨之(zhi)際,房主便(bian)可借此物對陌生(sheng)人進行頗為(wei)(wei)有用的(de)(de)辨認。 貓眼(yan)作為(wei)(wei)防(fang)火門鏡(jing)(jing)是裝在住所戶門上(shang)的(de)(de)一種(zhong)小(xiao)型光學儀器,便(bian)于居民調(diao)查(cha)野(ye)外狀況(kuang)。已(yi)成為(wei)(wei)居家安(an)全的(de)(de)必(bi)需品(pin)。它是由一塊凹透(tou)鏡(jing)(jing)(物鏡(jing)(jing))和一塊凸透(tou)鏡(jing)(jing)組(zu)成。物鏡(jing)(jing)的(de)(de)焦距極……
防火(huo)門(men)(men)(men)鏡(jing)反(fan)窺(kui)鏡(jing):也叫(jiao)反(fan)防火(huo)門(men)(men)(men)鏡(jing)觀察(cha)鏡(jing)/反(fan)防火(huo)門(men)(men)(men)鏡(jing)監視器等,是一(yi)種專(zhuan)門(men)(men)(men)針(zhen)對“防火(huo)門(men)(men)(men)鏡(jing)”設計(ji)的(de)窺(kui)探(tan)東西,它(ta)能夠通過(guo)“防火(huo)門(men)(men)(men)鏡(jing)”從門(men)(men)(men)外窺(kui)探(tan)室(shi)(shi)內情(qing)況。憑借反(fan)防火(huo)門(men)(men)(men)鏡(jing)在天(tian)然光下,室(shi)(shi)內所有一(yi)切都(dou)能用肉眼看到(dao),分量還非(fei)常輕,鏡(jing)筒小巧,掌心完全能夠覆蓋,放在腰帶、口袋或背心上都(dou)行,也能夠扣在鑰(yao)匙鏈(lian)上。 防火(huo)門(men)(men)(men)鏡(jing)反(fan)窺(kui)鏡(jing)外觀基本相(xiang)同:長(chang)度十多厘米(mi)……
防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)同(tong)望(wang)遠(yuan)鏡(jing)(jing)(jing)、顯微鏡(jing)(jing)(jing)一樣,都是由物(wu)(wu)鏡(jing)(jing)(jing)和(he)目(mu)鏡(jing)(jing)(jing)組成。物(wu)(wu)鏡(jing)(jing)(jing)是凹透鏡(jing)(jing)(jing),目(mu)鏡(jing)(jing)(jing)是凸透鏡(jing)(jing)(jing),但物(wu)(wu)鏡(jing)(jing)(jing)的焦距較短,目(mu)鏡(jing)(jing)(jing)的焦距離(li)較長(chang),且(qie)目(mu)鏡(jing)(jing)(jing)的焦距應等于(yu)(yu)或大(da)于(yu)(yu)物(wu)(wu)鏡(jing)(jing)(jing)與目(mu)鏡(jing)(jing)(jing)的距離(li)(防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)的長(chang)度)和(he)物(wu)(wu)鏡(jing)(jing)(jing)的焦距之和(he),防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)的長(chang)度約3cm。 反防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)俗稱“反防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)調查(cha)鏡(jing)(jing)(jing)”,是一種“放在防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)外側(ce)就能夠經(jing)過防(fang)(fang)火門(men)(men)(men)鏡(jing)(jing)(jing)明晰調查(cha)室內狀況的設備”。絕大(da)多……