電子顯微鏡與光學顯微鏡有何區別呢?
dianzixianweijingshiyidianzishuweizhaomingyuan,tongguodianziliuduiyangpindetoushehuofanshejidiancitoujingdeduojifangdahouzaiyingguangpingshangchengxiangdedaxingyiqi,dianzixianweijingyoudianziliudaitikejianguang,youcichangdaititoujing,rangdianzideyundongdaiti,shiliyonglebochangbiputongkejianguangduandeduodeX射she線xian成cheng像xiang,具ju備bei很hen高gao的de分fen辨bian率lv。而er光guang學xue顯xian微wei鏡jing則ze是shi利li用yong可ke見jian光guang照zhao明ming,將jiang微wei小xiao物wu體ti形xing成cheng放fang大da影ying像xiang的de光guang學xue儀yi器qi。概gai括kuo起qi來lai,電dian子zi顯xian微wei鏡jing與yu光guang學xue顯xian微wei鏡jing主zhu要yao有you以yi下xia幾ji個ge方fang麵mian的de區qu別bie:
1.照明源不同。電鏡所用的照明源是電子槍發出的電子流,而光鏡的照明源是可見光(日光或燈光),由於電子流的波長遠短於光波波長,故電鏡的放大及分辨率顯著地高於光鏡。
2.透鏡不同。電鏡中起放大作用的物鏡是電磁透鏡(能在部位產生磁場的環形電磁線圈),而光鏡的物鏡則是玻璃磨製而成的光學透鏡。電鏡中的電磁透鏡共有三組,分別與光鏡中聚光鏡、物鏡和目鏡的功能相當。
3.chengxiangyuanlibutong。zaidianjingzhong,zuoyongyubeijianyangpindedianzishujingdiancitoujingfangdahoudadaoyingguangpingshangchengxianghuozuoyongyuganguangjiaopianchengxiang。qidianzinongdandechabiechanshengdejilishi,dianzishuzuoyongyubeijianyangpinshi,rushedianziyuwuzhideyuanzifashengpengzhuangchanshengsanshe,youyuyangpinbutongbuweiduidianziyoubutongsanshedu,guyangpindianzixiangyinongdanchengxian。erguangjingzhongyangpindewuxiangyiliangduchachengxian,tashiyoubeijianyangpindebutongjiegouxishouguangxianduoshaodebutongsuozaochengde。
4.所用標本製備方式不同,電鏡觀察所用組織細胞標本的製備程序較複雜,技術難度和費用都較高,在取材、固定、脫水和包埋等環節上需要的試劑和操作,還需將包埋好的組織塊放人切片機切成50~100nm厚的超薄標本片。而光鏡觀察的標本則一般置於載玻片上,如普通組織切片標本、細胞塗片標本、組織壓片標本和細胞滴片標本等。
guangxuexianweijingdefenbianlvyuguangbodebochangyouguan。duiyujiejinhexiaoyuguangbobochangdewuti,guangxuexianweijingjiuwunengweilile。dianziyundongdebochangbiguangbobochangduandeduo,jiukeyikandaogengxixiaodewuti。guangxuexianweijingshiyouyizuguangxuejingtouzuchengdefangdachengxiangxitong,erdianzixianweijingyoudianziliudaitikejianguang,youcichangdaititoujing,rangdianzideyundongdaitiguangzi,zheyangjiukeyikandaobiguangxuexitongnengkandaodegengxiaodewuti。
以yi上shang就jiu是shi關guan於yu光guang學xue顯xian微wei鏡jing與yu電dian子zi顯xian微wei鏡jing區qu別bie的de相xiang關guan介jie紹shao,相xiang信xin大da家jia在zai閱yue讀du後hou對dui此ci有you了le相xiang應ying的de了le解jie,在zai選xuan擇ze時shi要yao結jie合he需xu求qiu來lai選xuan擇ze,希xi望wang對dui您nin有you所suo幫bang助zhu。
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