{"id":570,"date":"2021-03-03T15:02:13","date_gmt":"2021-03-03T07:02:13","guid":{"rendered":"https:\/\/www.hyleer.com\/?p=570"},"modified":"2021-03-03T18:56:05","modified_gmt":"2021-03-03T10:56:05","slug":"%e7%9b%b8%e6%9c%ba%e5%88%86%e8%be%a8%e7%8e%87%e5%8e%9f%e7%90%86%e5%8f%8a%e8%ae%a1%e7%ae%97","status":"publish","type":"post","link":"https:\/\/www.hyleer.com\/?p=570","title":{"rendered":"\u76f8\u673a\u5206\u8fa8\u7387\u539f\u7406\u53ca\u8ba1\u7b97"},"content":{"rendered":"

\u4e00\u3001\u955c\u5934\u7684\u5206\u8fa8\u7387<\/p>\n

\u5728\u7247\u76f8\u673a\u65f6\u4ee3\u7531\u4e8e\u80f6\u7247\u7684\u5206\u8fa8\u7387\u8981\u9ad8\u4e8e\u955c\u5934\uff0c\u6240\u4ee5\u76f8\u673a\u7684\u5206\u8fa8\u7387\u4e00\u822c\u5c31\u7528\u955c\u5934\u5206\u8fa8\u7387\u8868\u793a\u3002\u4f46\u6570\u7801\u76f8\u673a\u7531\u4e8e\u4f20\u611f\u5668\u7684\u5206\u8fa8\u7387\u4e0d\u540c,\u76f8\u673a\u7684\u5206\u8fa8\u7387\u8981\u53d6\u51b3\u4e8e\u955c\u5934\u53ca\u4f20\u611f\u5668\u53cc\u65b9\u3002\u6211\u4eec\u5148\u6765\u8ba8\u8bba\u955c\u5934\u7684\u5206\u8fa8\u7387\u3002<\/p>\n

\u7531\u4e8e\u955c\u5934\u6709\u50cf\u5dee,\u5728\u6210\u50cf\u65f6\u4f1a\u4f7f\u9510\u5ea6\u548c\u5bf9\u6bd4\u5ea6\u4e0b\u964d\uff0c\u6240\u8c13\u955c\u5934\u5206\u8fa8\u7387\u5c31\u662f\u8861\u91cf\u9510\u5ea6\u548c\u5bf9\u6bd4\u5ea6\u4e0b\u964d\u7684\u7a0b\u5ea6\u3002\u9020\u6210\u50cf\u5dee\u4f7f\u5206\u8fa8\u7387\u4e0b\u964d\u7684\u539f\u56e0\u6709\u4e09\u79cd\u3002<\/p>\n

1.\u00a0\u00a0\u8272\u5dee\u00a0\u00a0\u00a0\u4e0d\u540c\u6ce2\u957f\u5149\u7684\u6298\u5c04\u7387\u4e0d\u540c\uff0c\u4e0d\u80fd\u805a\u7126\u5728\u540c\u4e00\u5e73\u9762\u4e0a\uff0c\u7531\u6b64\u9020\u6210\u7684\u50cf\u5dee\u79f0\u4e3a\u8272\u5dee\uff0c\u8272\u5dee\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u8d85\u4f4e\u8272\u6563\u955c\u7247(ED\u955c\u7247)\u6765\u7ea0\u6b63\uff0c\u597d\u7684\u955c\u5934ED\u955c\u7247\u8f83\u591a\uff0c\u4e00\u822c\u90fd\u67092-3\u7247\u3002<\/p>\n

<\/p>\n

2.\u00a0\u00a0\u7403\u5dee\u00a0\u00a0\u00a0\u7531\u4e8e\u955c\u5934\u662f\u7403\u9762\u7684\u81f4\u4f7f\u8fd1\u8f74\u4e0e\u8fdc\u8f74\u7684\u5e73\u884c\u5149\u4e0d\u80fd\u805a\u7126\u5230\u540c\u4e00\u70b9\u4e0a\uff0c\u4ea7\u751f\u50cf\u6563\uff0c\u6167\u5dee\u7b49\u73b0\u8c61\uff0c\u79f0\u4e4b\u4e3a\u7403\u9762\u50cf\u5dee\u3002\u53ef\u4ee5\u5229\u7528\u7279\u522b\u7684\u51f9\u51f8\u900f\u955c\uff08\u5373\u975e\u7403\u9762\u955c\u7247\uff09\u4fee\u6b63\u6298\u5c04\u89d2\u5ea6\u6765\u7ea0\u6b63\uff0c\u4e5f\u53ef\u901a\u8fc7\u7f29\u5c0f\u5149\u5708\u6765\u6e1b\u5c11\u8fd9\u7c7b\u50cf\u5dee\u3002<\/p>\n

<\/a><\/p>\n

3.\u00a0\u00a0\u884d\u5c04\u00a0\u00a0\u00a0\u00a0\u7531\u4e8e\u5149\u7684\u6ce2\u52a8\u6027\u4ea7\u751f\u7684\u884d\u5c04\u5f25\u6563\u73b0\u8c61\u4f7f\u4e00\u4e2a\u5149\u70b9\u6210\u50cf\u65f6\u4e0d\u662f\u4e00\u4e2a\u70b9\u800c\u662f\u4e00\u7ec4\u9010\u6e10\u8870\u51cf\u7684\u660e\u6697\u76f8\u95f4\u7684\u5149\u73af\uff0c\u79f0\u4e3a\u7231\u91cc\u6591\uff08Airy disk)\uff0c\u7531\u4e8e\u5176\u4e2d\u592e\u4eae\u6591\u5360\u670984%\u7684\u80fd\u91cf\uff0c\u4e00\u822c\u5c31\u4ee5\u5176\u76f4\u5f84\u6765\u8861\u91cf\u7231\u91cc\u6591\u7684\u5927\u5c0f\u3002\u8be5\u5706\u7684\u5927\u5c0f\u5c31\u662f\u6210\u50cf\u7684\u6700\u5c0f\u6781\u9650\uff0c\u4e5f\u662f\u955c\u5934\u5206\u8fa8\u7387\u7684\u6700\u5927\u6781\u9650\u3002<\/p>\n

<\/p>\n

\u6839\u636e\u76f8\u5173\u7406\u8bba\u5206\u6790\uff0c\u7231\u91cc\u6591\u76f4\u5f84\u53ef\u8868\u793a\u4e3a<\/p>\n

<\/p>\n

\u5176\u4e2d\u03bb\u4e3a\u5149\u6ce2\u957f\uff0cf\u662f\u5149\u5708\u503c\u3002\u53ef\u89c1\u5f53\u5149\u5708\u589e\u5927\uff08f\u503c\u51cf\u5c0f\uff09\u65f6\u7231\u91cc\u6591\u76f4\u5f84\u6e1b\u5c0f\uff0c\u5206\u8fa8\u7387\u63d0\u9ad8\u3002<\/p>\n

\u4e0d\u540c\u5149\u5708\u548c\u5149\u6ce2\u957f\u4e0b\u7684\u7231\u91cc\u6591\u76f4\u5f84<\/p>\n\n\n\n\n\n\n\n
\u00a0\u5149 \u5708<\/td>\n\u84dd\u5149(0.4\u03bcm)<\/td>\n\u7eff\u9ec4(0.55\u03bcm)<\/td>\n\u7ea2\u5149(0.7\u03bcm)<\/td>\n<\/tr>\n
F4<\/td>\n3.9\u03bcm<\/td>\n5.4\u03bcm<\/td>\n6.8\u03bcm<\/td>\n<\/tr>\n
F5.6<\/td>\n5.5\u03bcm<\/td>\n7.5\u03bcm<\/td>\n9.6\u03bcm<\/td>\n<\/tr>\n
F8<\/td>\n7.8\u03bcm<\/td>\n10.7\u03bcm<\/td>\n13.7\u03bcm<\/td>\n<\/tr>\n
F11<\/td>\n10.7\u03bcm<\/td>\n14.8\u03bcm<\/td>\n18.8\u03bcm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4ee5\u4e0a\u4e09\u79cd\u50cf\u5dee\u7684\u56e0\u7d20\u90fd\u4f1a\u5bfc\u81f4\u5206\u8fa8\u7387\u4e0b\u964d\uff0c\u5176\u4e2d\u7403\u5dee\u548c\u884d\u5c04\u90fd\u548c\u5149\u5708\u6709\u5173\uff0c\u4f46\u6539\u53d8\u5149\u570f\u5bf9\u4e24\u8005\u7684\u4f5c\u7528\u662f\u76f8\u53cd\u7684\uff0c\u5f53\u5149\u5708\u6e1b\u5c0f\u65f6\u7403\u5dee\u51cf\u5c11\u800c\u884d\u5c04\u589e\u52a0\uff0c\u5f53\u5149\u5708\u589e\u5927\u65f6\u5219\u76f8\u53cd\uff0c\u56e0\u6b64\u6709\u4e00\u4e2a\u6700\u4f73\u7684\u5e73\u8861\u70b9\uff0c\u5373\u6240\u8c13\u6700\u4f73\u5149\u5708\uff0c\u4e00\u822c\u662f\u6700\u5927\u5149\u5708\u5f80\u4e0b\u4e09\u6863\uff0c\u901a\u5e38\u90fd\u5728f8\u5de6\u53f3\u3002<\/p>\n

\u8272\u5dee\u548c\u7403\u5dee\u53ef\u4ee5\u901a\u8fc7\u6539\u8fdb\u5de5\u827a\u6765\u6821\u6b63\u6216\u6d88\u9664\uff0c\u4f46\u884d\u5c04\u662f\u81ea\u7136\u73b0\u8c61\uff0c\u4e0d\u80fd\u7528\u4eba\u5de5\u65b9\u6cd5\u6765\u51cf\u5f31\u6216\u6d88\u9664\u3002\u6240\u8c13\u7406\u60f3\u955c\u5934\u662f\u6307\u6ca1\u6709\u8272\u5dee\u53ca\u7403\u5dee\u7684\u955c\u5934\uff0c\u4e5f\u5c31\u662f\u5047\u8bbe\u8272\u5dee\u4e0e\u7403\u5dee\u901a\u8fc7\u5de5\u827a\u5df2\u6821\u6b63\u4e3a\u96f6\u4e86\u3002\u8fd9\u65f6\u955c\u5934\u7684\u5206\u8fa8\u7387\u53ea\u53d6\u51b3\u4e8e\u56e0\u884d\u5c04\u4ea7\u751f\u7684\u7231\u91cc\u6591\u3002\u7231\u91cc\u6591\u662f\u70b9\u5149\u6e90\u7684\u6210\u50cf\uff0c\u8ddf\u636e\u745e\u5229\u5224\u636e\uff08RayleighCriterion\uff09\u8981\u5206\u8fa8\u51fa\u4e24\u76f8\u90bb\u70b9\u7684\u6210\u50cf\uff0c\u4e24\u70b9\u4e4b\u95f4\u7684\u6700\u5c0f\u8ddd\u79bb\u5fc5\u987b\u5927\u4e8e\u7231\u91cc\u6591\u7684\u534a\u5f84R\uff0c\u5426\u5219\u4e24\u70b9\u7684\u6210\u50cf\u5c31\u4f1a\u91cd\u53e0\u800c\u65e0\u6cd5\u8fa8\u522b\uff0c\u6839\u636e\u4e0a\u8ff0\u516c\u5f0f\uff0c\u5728\u5149\u7684\u4e2d\u95f4\u6ce2\u957f\u4e0b\uff0c\u5f53\u5149\u5708\u4e3af8\u65f6\u7231\u91cc\u6591\u534a\u5f84\u57285-6\u5fae\u7c73\u4e4b\u95f4\uff0c\u6b64\u65f6\u7684\u5206\u8fa8\u73871\/R=170-200lp\/mm\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e00\u4e2a\u7406\u60f3\u955c\u5934\u5728\u5149\u5708\u4e3af8\u65f6\u955c\u5934\u7684\u5206\u8fa8\u7387\u4e0d\u4f1a\u8d85\u8fc7200lp\/mm\u3002 \u5728\u4e0b\u56fe\u4e2dB\u4e3a\u4e24\u70b9\u4e4b\u95f4\u8ddd\u79bb\u4e3a\u7231\u91cc\u6591\u534a\u5f84\uff0c\u53ef\u4ee5\u770b\u51fa\u4e24\u70b9\u5df2\u975e\u5e38\u63a5\u8fd1\u3002<\/p>\n

<\/p>\n

\u521a\u521a\u80fd\u5206\u8fa8\u3002\u53ef\u4ee5\u63a8\u7b97\u51fa\u6b64\u65f6\u7684MTF=9%\uff08\u6709\u5173MTF\u540e\u9762\u4f1a\u6709\u89e3\u91ca\uff09\u3002\u4e5f\u5c31\u662f200lp\/mm\u662fMTF=<\/p>\n

9%\u65f6\u7684\u6700\u9ad8\u5206\u8fa8\u7387\u3002\u82e5\u4e24\u70b9\u95f4\u8ddd\u79bb\u4e3a\u7231\u91cc\u6591\u76f4\u5f84\uff0c\u5982\u56feA\u6240\u793a\uff0c\u4e24\u70b9\u95f4\u5c31\u80fd\u5f88\u597d\u5206\u8fa8\uff0cMTF\u7ea6\u4e3a50%\uff0c\u4f46\u6b64\u65f6\u7684\u5206\u8fa8\u7387\u53ea\u6709100lp\/mm\u4e86\u3002\u4e0b\u56fe\u7ed9\u51fa\u4e0d\u540c\u5149\u5708\u4e0b\u7231\u91cc\u6591\u76f4\u5f84\u4ee5\u53ca\u7406\u60f3\u955c\u5934\u7684\u6700\u9ad8\u5206\u8fa8\u7387\uff0c\u7eff\u8272\u5149\u6ce2\u957f0.5\u5fae\u7c73\u3002<\/p>\n

<\/p>\n

2004\u5e74\u8521\u53f8\u516c\u53f8\u63a8\u51fa\u4e00\u6b3e\u53f7\u79f0\u65e0\u50cf\u5dee\u955c\u5934\uff0c\u5728\u5149\u5708\u4e3af4\u65f6\u5206\u8fa8\u7387\u8fbe400lp\/mm\uff0c\u6839\u636e\u4e0a\u9762\u7684\u5206\u6790\uff0c\u8fd9\u786e\u5b9e\u5df2\u8fbe\u5230\u6781\u9650\u5206\u8fa8\u7387\u4e86\u3002<\/p>\n

\u4e8c\u3001\u5206\u8fa8\u7387lp\/mm<\/p>\n

\u65e9\u671f\u955c\u5934\u5206\u8fa8\u7387\u90fd\u7528\u6bcf\u6beb\u7c73\u5185\u80fd\u5206\u8fa8\u51fa\u591a\u5c11\u7ebf\u6761\u6765\u8861\u91cf\u3002\u7ebf\u6761\u9ed1\u767d\u4ea4\u66ff\uff0c\u76f8\u90bb\u7684\u9ed1\u767d\u7ebf\u6761\u79f0\u4e3a\u4e00\u4e2a\u7ebf\u5bf9\uff0c\u4e8e\u662f\u5206\u8fa8\u7387\u5c31\u7528\u6bcf\u6beb\u7c73\u6709\u591a\u5c11\u7ebf\u5bf9\u6765\u8868\u793a\uff08lp\/mm\uff09\u3002\u901a\u8fc7\u7528\u7247\u62cd\u6444\u5370\u6709\u4e0d\u540c\u5bc6\u5ea6\u7ebf\u5bf9\u7684\u6d4b\u8bd5\u5361\uff08\u5982USAF1951\uff09\u7528\u9ad8\u500d\u653e\u5927\u955c\u67e5\u770b\u62cd\u5f97\u7684\u56fe\u7247\uff0c\u6d4b\u51fa\u955c\u5934\u7684\u5206\u8fa8\u7387<\/p>\n

<\/p>\n

\u5373\u6bcf\u6beb\u7c73\u53ef\u5206\u8fa8\u7684\u6700\u9ad8\u7ebf\u5bf9\u6570lp\/mm\u3002\u73b0\u5728\u5355\u4e2a\u955c\u5934\u7684\u6d4b\u8bd5\u4ecd\u7136\u53ef\u4ee5\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u4f46\u662f\u7528lp\/mm\u8fd9\u5355\u4e00\u6570\u636e\u6765\u8868\u793a\u955c\u5934\u7684\u5206\u8fa8\u7387\u6709\u70b9\u8fc7\u4e8e\u7b80\u5355\uff0c\u800c\u4e14\u7528\u4eba\u5de5\u76ee\u6d4b\u7684\u65b9\u6cd5\u4e5f\u6709\u8f83\u5927\u8bef\u5dee\u3002\u56e0\u6b64\u8fd9\u79cd\u6d4b\u91cf\u7684\u65b9\u6cd5\u73b0\u5df2\u5f88\u5c11\u91c7\u4e8e\u662f\u4fbf\u6709\u4e86\u7528MTF\u66f2\u7ebf\u6765\u8868\u8ff0\u5206\u8fa8\u7387\u3002<\/p>\n

\u4e09\u3001\u5206\u8fa8\u7387MTF\uff08\u8c03\u5236\u4f20\u9012\u51fd\u6570\uff09<\/p>\n

\u7c7b\u4f3c\u5728\u7535\u5b50\u6280\u672f\u4e2d\u7684\u9891\u7387\u54cd\u5e94\u66f2\u7ebf\u3002\u9ed1\u767d\u6761\u7eb9\u7531\u7a00\u5230\u5bc6\u7684\u53d8\u5316\u5c31\u76f8\u5f53\u4e8e\u7ebf\u6761\u9891\u7387\u7684\u53d8\u5316\uff0c\u4f46\u8fd9\u4e0d\u662f\u65f6\u95f4\u7684\u9891\u7387\u800c\u662f\u7a7a\u95f4\u9891\u7387\uff0c\u9ed1\u767d\u7ebf\u6761\u901a\u8fc7\u955c\u5934\u65f6\u7531\u4e8e\u50cf\u5dee\u4f7f\u6210\u50cf\u7684\u5bf9\u6bd4\u5ea6\u4e0b\u964d\uff0c\u4e8e\u662f\u5f15\u5165\u4e00\u4e2a\u53cd\u6620\u5bf9\u6bd4\u5ea6\u7684\u53c2\u6570—\u8c03\u5236\u5ea6M\u3002<\/p>\n

M=(Imax-Imin)\/(Imax+Imin)<\/p>\n

\u5176\u4e2dImax\u53caImin\u5206\u522b\u4e3a\u5149\u4fe1\u53f7\u7684\u6700\u5927\u503c\u53ca\u6700\u5c0f\u503c\uff0c\u5f88\u660e\u663eM\u503c\u57280-1\u4e4b\u95f4\u3002M\u8d8a\u5927\u5bf9\u6bd4\u5ea6\u8d8a\u5927\uff0cM=0\u65f6Imax=Imin\u9ed1\u767d\u76f8\u7b49\u5bf9\u6bd4\u5ea6\u4e3a0\u3002\u8bbe\u539f\u6709\u9ed1\u767d\u6761\u7eb9\u7684\u8c03\u5236\u5ea6\u4e3aM0\uff0c\u901a\u8fc7\u955c\u5934\u540e\u6210\u50cf\u6761\u7eb9\u7684\u8c03\u5236\u5ea6\u4e3aM\uff0c\u5219\u8c03\u5236\u5ea6\u4f20\u9012\u51fd\u6570MTF\u5b9a\u4e49\u4e3a<\/p>\n

MTF=M\/M0<\/p>\n

\u5982\u679c\u662f\u7406\u60f3\u7684\u6d4b\u8bd5\u5361\uff0c\u5361\u4e0a\u5404\u79cd\u9891\u7387\u7684\u9ed1\u767d\u6761\u7eb9\u7684\u8c03\u5236\u5ea6\u5747\u4e3a1\uff0c\u5373M0=1\u3002\u8fd9\u65f6MTF\u5c31\u662f\u6210\u50cf\u6761\u7eb9\u7684\u8c03\u5236\u5ea6M\u3002<\/p>\n

MTF=(Imax-Imin)\/(Imax+Imin)<\/p>\n

\u968f\u7740\u7a7a\u95f4\u9891\u7387lp\/mm\u7684\u589e\u52a0\uff08\u9ed1\u767d\u6761\u7eb9\u7531\u7a00\u5230\u5bc6\u7684\u589e\u52a0\uff09\uff0cMTF\u4e5f\u968f\u4e4b\u964d\u4f4e\uff08\u6210\u50cf\u7684\u5bf9\u6bd4\u5ea6\u4e0b\u964d\uff09\u3002\u5f53lp\/ mm \u5f88\u4f4e\u65f6\uff0cMTF\u63a5\u8fd11\uff0c\u5bf9\u6bd4\u5ea6\u5f88\u9ad8\u8fb9\u754c\u6e05\u6670\uff1blp\/mm\u589e\u52a0MTF\u4e0b\u964d\uff0c\u5f53MTF\u964d\u4e3a0\u65f6\u9ed1\u767d\u90fd\u5448\u76f8<\/p>\n

<\/p>\n

\u540c\u7684\u7070\u8272\uff0c\u65e0\u6cd5\u5224\u522b\uff0c\u8fd9\u65f6\u7684lp\/mm\u4e3a\u5206\u8fa8\u7387\u7684\u6781\u9650\u3002\u5b9e\u9645\u4e0a\u5f53MTF=0.05\u65f6\u5c31\u5df2\u5f88\u96be\u8fa8\u522b\u9ed1\u767d\u7684\u8fb9\u7f18\u4e86\u3002\u6ca1\u6709\u660e\u786e\u89c4\u5b9aMTF\u7b49\u4e8e\u591a\u5c11\u65f6\u7684lp\/mm\u4e3a\u955c\u5934\u7684\u5206\u8fa8\u7387\uff0c\u4e00\u822c\u5c31\u7ed9\u51faMTF\u7684\u66f2\u7ebf\u6765\u5224\u65ad\u955c\u5934\u7684\u5206\u8fa8\u7387\uff0c\u7528\u4f4e\u9891\u6bb5\uff08lp\/mm\u8f83\u4f4e\uff09\u7684MTF\u8868\u793a\u53cd\u5dee\uff0c\u7528\u4e2d\u95f4\u9891\u6bb5\uff08lp\/mm\u8f83\u9ad8\uff09\u7684MTF\u8868\u793a\u5206\u8fa8\u7387\u3002\u4e5f\u6709\u7ed9\u51faMTF50\u7684\u5206\u8fa8\u7387\uff0c\u5373MTF=0.50\u65f6\u7684lp\/mm\u3002<\/p>\n

<\/p>\n

\u4ee5\u4e0a\u662f\u7528MTF\u7684\u9891\u7387\u54cd\u5e94\u66f2\u7ebf\u6765\u8868\u793a\u955c\u5934\u7684\u5206\u8fa8\u7387\uff0c\u4f46\u662f\u5236\u9020\u5382\u5546\u63d0\u4f9b\u7684MTF\u66f2\u7ebf\u662f\u53e6\u4e00\u79cd\u5f62\u5f0f\uff0c\u5b83\u53ea\u6e2c\u8bd510lp\/mm\u548c30lp\/mm\u4e24\u79cd\u9891\u7387\uff0c10lp\/mm\u7684MTF\u4ee3\u8868\u53cd\u5dee\uff08\u5bf9\u6bd4\u5ea6\uff09\uff0c30lp\/mm\u7684MTF\u4ee3\u8868\u5206\u8fa8\u7387\u3002\u66f2\u7ebf\u7684\u7eb5\u5ea7\u6807\u4ecd\u662fMTF\uff0c\u4f46\u6a2a\u5ea7\u6807\u662f\u50cf\u5e73\u9762\u4e0a\u79bb\u4e2d\u5fc3\u70b9\u7684\u8ddd\u79bb\uff0c\u5373\u504f\u79bb\u955c\u5934\u4e2d\u5fc3\u7684\u8ddd\u79bb\uff0c\u53ef\u4ee5\u53cd\u6620\u51fa\u955c\u5934\u7684\u8fb9\u7f18\u6548\u5e94\u3002\u53e6\u5916\u5728\u504f\u79bb\u6210\u50cf\u4e2d\u5fc3\u7684\u4f4d\u7f6e\u4e0a\u4e0e\u5f84\u5411\u5e73\u884c\u548c\u5782\u76f4\u7684\u7ebf\u6761\u5176MTF\u503c\u662f\u4e0d\u540c\u7684\uff0c\u56e0\u6b64\u5c31\u9700\u5206\u5225\u6d4b\u8bd5\u5e73\u884c\u7ebf\u6761\u7684MTF\uff08S\u66f2\u7ebf\uff09\u548c\u5782\u76f4\u7ebf\u6761\u7684MTF\uff08M\u66f2\u7ebf\uff09\u3002\u56e0\u6b64\u4e00\u822c\u5236\u9020\u5382\u5546\u90fd\u4f1a\u63d0\u4f9b\u81f3\u5c11\u4e24\u79cd\u9891\u7387\u4e24\u79cd\u7ebf\u6761\u5171\u56db\u6761MTF\u66f2\u7ebf\u3002<\/p>\n

<\/p>\n

\u4e0a\u56fe\u662f\u67d0\u955c\u5934\u5728\u5149\u5708f1.8\u65f6\u6d4b\u5f97\u7684\u56db\u6761\u66f2\u7ebf\u3002\u5176\u4e2d\u7ea2\u8272\u662f10lp\/mm\u8868\u793a\u53cd\u5dee\u3002\u84dd\u8272\u662f30lp\/mm \u8868\u793a\u5206\u8fa8\u7387\u3002\u5b9e\u7ebf\u662f\u6c34\u5e73\u65b9\u5411\u7684S\u66f2\u7ebf\uff0c\u865a\u7ebf\u662f\u5782\u76f4\u65b9\u5411\u7684M\u66f2\u7ebf\u3002<\/p>\n

\u5149\u5708\u5bf9\u4e8e\u6d4b\u8bd5MTF\u4e5f\u6709\u8f83\u5927\u5f71\u54cd\uff0c\u5728\u63d0\u4f9bMTF\u65f6\u4e00\u822c\u90fd\u4f1a\u7ed9\u51fa\u662f\u6700\u5927\u5149\u5708\u8fd8\u662f\u6700\u4f73\u5149\u5708\uff0c\u6709\u7684\u5236\u9020\u5382\u5546\uff08\u5982Canon\uff09\u4e5f\u4f1a\u63d0\u4f9b\u4e24\u79cd\u5149\u5708\u51718\u6761MTF\u66f2\u7ebf\u3002<\/p>\n

<\/p>\n

\u4e0a\u56fe\u4e2d\u84dd\u8272\u662f\u5149\u5708f8\uff0c\u9ed1\u8272\u662f\u6700\u5927\u5149\u5708\u3002\u7c97\u7ebf\u662f10lp\/mm\uff0c\u7ec6\u7ebf\u662f30lp\/mm\u3002\u5b9e\u7ebf\u662fS\u66f2\u7ebf\uff0c\u865a\u7ebf\u662fM\u66f2\u7ebf\u3002<\/p>\n

\u67e5\u770b\u5236\u9020\u5382\u5546\u63d0\u4f9b\u7684MTF\u66f2\u7ebf\u65f6\u9700\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9<\/p>\n

1\u3001\u6a2a\u5ea7\u6807\u662f\u79bb\u6210\u50cf\u5e73\u9762\u4e2d\u5fc3\u7684\u8ddd\u79bb\uff0c\u5bf9\u4e8e135\u5168\u753b\u5e45\u76f8\u673a\uff0c\u50cf\u5e73\u9762\u5bf9\u89d2\u7ebf\u957f\u5ea6\u4e3a43.3mm\uff0c\u79bb\u50cf\u4e2d\u5fc3\u6700\u5927\u8ddd\u79bb\u4e3a21.6mm\uff0c\u6240\u4ee5\u6a2a\u5ea7\u6807\u8d85\u8fc7\u8be5\u503c\u662f\u6ca1\u6709\u610f\u4e49\u65f3\u3002\u5bf9\u4e8eAPS\u534a\u753b\u5e45\u76f8\u673a\u6a2a\u5ea7\u6807\u6709\u6548\u8303\u56f4\u53ea\u662f\u572814mm\u4ee5\u5185\u3002<\/p>\n

2\u300110lp\/mm\u66f2\u7ebf\u4ee3\u8868\u955c\u5934\u7684\u53cd\u5dee\uff0c30lp\/mm\u66f2\u7ebf\u4ee3\u8868\u955c\u5934\u7684\u5206\u8fa9\u7387\u300210lp\/mm\u603b\u662f\u6bd430lp\/mm\u597d\u3002<\/p>\n

3\u3001\u5149\u5708f8\u6bd4\u6700\u5927\u5149\u5708\u597d\u3002<\/p>\n

3\u3001\u5404\u79cdMTF\u66f2\u7ebf\u8d8a\u5e73\u76f4\u8d8a\u597d\uff0c\u8bf4\u660e\u955c\u5934\u4e2d\u5fc3\u4e0e\u8fb9\u7f18\u6210\u50cf\u5747\u5300\u3002<\/p>\n

4\u3001\u4e0d\u5b9c\u5c07\u4e0d\u540c\u5382\u5546\u7684MTF\u66f2\u7ebf\u6bd4\u8f83\uff0c\u56e0\u4e3a\u5404\u81ea\u7684\u6d4b\u8bd5\u73af\u5883\u4e0d\u5c3d\u76f8\u540c\u3002<\/p>\n

MTF\u7684\u6d4b\u8bd5\u4e00\u822c\u90fd\u662f\u7528\u4e13\u95e8\u7684\u6d4b\u8bd5\u8bbe\u5907\uff0c\u4e5f\u6709\u516c\u53f8\uff08\u5982Imatest\uff09\u63d0\u4f9b\u4e13\u7528\u6d4b\u8bd5\u8f6f\u4ef6\uff0c\u53ef\u4f7f\u666e\u901a\u7528\u6237\u901a\u8fc7\u62cd\u6444\u6d4b\u8bd5\u5361\u518d\u7528\u8f6f\u4ef6\u5206\u6790\u5f97\u51faMTF\u66f2\u7ebf\u3002<\/p>\n

\u867d\u7136MTF\u66f2\u7ebf\u80fd\u5f88\u5168\u9762\u5730\u53cd\u6620\u51fa\u955c\u5934\u7684\u5206\u8fa8\u7387\uff0c\u4f46\u6709\u5f88\u591a\u66f2\u7ebf\uff0c\u6570\u636e\u592a\u591a\uff0c\u800c\u4e14\u6d4b\u8bd5\u590d\u6742\uff0c\u6240\u4ee5\u66f4\u9002\u5408\u4e13\u4e1a\u90e8\u95e8\uff0c\u5bf9\u4e8e\u4e00\u822c\u4f7f\u7528\u8005\u6765\u8bf4\u4e0d\u6613\u770b\u61c2\u4e5f\u4e0d\u591f\u76f4\u89c2\uff0c\u7f3a\u4e4f\u5b9e\u7528\u6027\u3002\u4e8e\u662f\u5c31\u6709\u4e86\u4ee3\u8868\u6570\u7801\u76f8\u673a\u5206\u8fa8\u7387\u7684LW\/PH\u3002<\/p>\n

\u56db\u3001\u5206\u8fa8\u7387 LW\/PH<\/p>\n

\u80f6\u7247\u76f8\u673a\u56e0\u7247\u5206\u8fa8\u7387\u9ad8\u4e8e\u955c\u5934\u5206\u8fa8\u7387\uff0c\u76f8\u673a\u7684\u5206\u8fa8\u7387\u4e3b\u8981\u53d6\u51b3\u4e8e\u955c\u5934\uff0c\u800c\u4e14135\u76f8\u673a\u5e95\u7247\u662f\u7edf\u4e0036*24mm\uff0c\u6210\u50cf\u5927\u5c0f\u662f\u4e00\u81f4\u7684\uff0c\u56e0\u6b64\u901a\u8fc7\u62cd\u6444\u6807\u51c6\u7684\u6d4b\u8bd5\u5361\uff0c\u5206\u6790\u6210\u50cf\u5f97\u5230\u6bcf\u6beb\u7c73\u591a\u5c11\u7ebf\u5bf9\u7684\u5206\u8fa8\u7387lp\/mm\u3002\u6570\u7801\u76f8\u673a\u7531\u4e8e\u4f20\u611f\u5668\u7684\u50cf\u7d20\u4e0d\u540c\uff0c\u76f8\u673a\u7684\u5206\u8fa8\u7387\u8981\u53d6\u51b3\u4e8e\u955c\u5934\u53ca\u4f20\u611f\u5668\u53cc\u65b9\uff0c\u800c\u4e14\u4e0d\u540c\u76f8\u673a\u7684\u4f20\u611f\u5668\u5c3a\u5bf8\u4e0d\u540c\uff0c\u4f7f\u6210\u50cf\u5927\u5c0f\u5404\u5f02\uff0c\u56e0\u6b64\u7528\u6210\u50cf\u7684lp\/mm\u4e0d\u80fd\u4ee3\u8868\u76f8\u673a\u7684\u5206\u8fa8\u7387\uff0c\u4e8e\u662f\u4fbf\u5f15\u5165\u4e00\u4e2a\u4e0e\u4f20\u611f\u5668\u5927\u5c0f\u65e0\u5173\u7684\u5206\u8fa8\u7387LW\/PH\uff0c\u5176\u4e2dLW\uff08linewidth\uff09\u662f \u7ebf\u5bbd\uff0c\u4f46\u4e26\u4e0d\u662f\u7ebf\u6761\u7684\u5bbd\u5ea6\uff0c\u662f\u6307\u6d4b\u8bd5\u5361\u4e0a\u6807\u8bc6\u7684\u5bbd\u5ea6\uff0c\u5b9e\u9645\u4e0a\u5c31\u662f\u7ebf\u6761\u6570\u3002PH\uff08picture height\uff09 \u753b\u9762\u9ad8\u5ea6\uff0c\u5c31\u662f\u6307\u4f20\u611f\u5668\u7684\u9ad8\u5ea6\uff0c\u56e0\u6b64LW\/PH\u5c31\u8868\u793a\u753b\u9762\u7eb5\u5411\u80fd\u5206\u8fa8\u51fa\u591a\u5c11\u6761\u7ebf\uff0c\u5b83\u7684\u5355\u4f4d\u5c31\u662f\u7ebf\u6570\uff0c\u7531\u4e8e\u5b83\u4e0d\u662f\u7528\u6bcf\u6beb\u7c73\u8861\u91cf\u800c\u662f\u7528\u753b\u9762\u9ad8\u5ea6\u91cf\uff0c\u56e0\u6b64\u4fbf\u4e0e\u4f20\u611f\u5668\u5c3a\u5bf8\u65e0\u5173\uff0c\u4e24\u4e2a\u4e0d\u540c\u5927\u5c0f\u7684\u4f20\u611f\u5668\u82e5LW\/PH\u76f8\u540c\u5c31\u8868\u793a\u5206\u8fa8\u7387\u76f8\u540c\u3002LW\/PH\u4e0d\u7b49\u540c\u4e8e\u4f20\u611f\u5668\u7eb5\u5411\u50cf\u7d20\u6570\uff08\u5c3d\u7ba1\u4e24\u8005\u6709\u5173\u8054\uff09\u3002\u4f20\u611f\u5668\u7eb5\u5411\u50cf\u7d20\u662f\u56fa\u5b9a\u7684\uff0c\u800cLW\/PH\u662f\u6d4b\u5f97\u7684\u753b\u9762\u7eb5\u5411\u6709\u591a\u5c11\u6761\u7ebf\uff0c\u53ef\u4ee5\u8bf4\u4f20\u611f\u5668\u7eb5\u5411\u50cf\u7d20\u662fLW\/PH\u7684\u6781\u9650\u503c\uff0c\u5373\u4f7f\u955c\u5934\u7684\u5206\u8fa8\u7387\u518d\u9ad8\uff0cLW\/PH\u4e5f\u53ea\u662f\u63a5\u8fd1\u800c\u4e0d\u80fd\u8d85\u8fc7\u4f20\u611f\u5668\u7684\u7eb5\u5411\u50cf\u7d20\u3002LW\/PH \u4e0elp\/mm\u4e4b\u95f4\u53ef\u4ee5\u8f6c\u6362\uff0clp\u662f\u7ebf\u5bf9\u5305\u542b\u4e24\u6761\u7ebf\uff0c\u6240\u4ee5<\/p>\n

lp\/mm=(LW\/PH)\/(2*\u753b\u9762\u9ad8\u5ea6\uff09<\/p>\n

\u4f46\u8fd9\u6837\u8f6c\u6362\u8fc7\u6765\u7684lp\/mm\u662f\u4e0e\u753b\u9762\u9ad9\u5ea6\uff08\u4f20\u611f\u5668\u9ad8\u5ea6\uff09\u6709\u5173\uff0c\u7528\u5b83\u6765\u505a\u76f8\u4e92\u6bd4\u8f83\u662f\u6ca1\u6709\u610f\u4e49\u7684\uff0c\u53ef\u5c07\u5176\u89c4\u683c\u5316\u4e3a135\u76f8\u673a\u5e95\u7247\u7684\u5927\u5c0f\uff0836*24mm\uff09\uff0c\u5373\u6240\u8c13\u7b49\u6548\u5206\u8fa8\u7387\u3002<\/p>\n

\u7b49\u6548\u5206\u8fa8\u7387=lp\/mm*\uff08\u753b\u9762\u9ad8\u5ea6\/24\uff09=\uff08LW\/PH\uff09\/48<\/p>\n

\u56e0\u6b64\u6240\u8c13\u7b49\u6548\u5206\u8fa8\u7387\u5b9e\u9645\u4e0a\u5c31\u662fLW\/PH\u7684\u53e6\u4e00\u79cd\u8868\u793a\u65b9\u5f0f\u3002<\/p>\n

LW\/PH\u7684\u6d4b\u8bd5\u4e00\u822c\u8981\u7528ISO12233\u6807\u51c6\u6d4b\u8bd5\u5361\uff0c\u5361\u4e0a\u6709\u5404\u79cd\u6d4b\u8bd5\u56fe\u6807\uff0c\u7528\u4e8eLW\/PH\u6d4b\u8bd5\u53ea\u9700\u5361\u4e2d\u90e8\u758f\u5bc6\u6e10\u53d8\u7684\u7eb5\u6a2a\u7ebf\u6761:<\/p>\n

J1,K1\u7528\u4e8e\u6d4b\u91cf\u4e2d\u5fc3\u7684\u6c34\u5e73\u5206\u8fa8\u7387,\u6700\u9ad8\u53ef\u8fbe4000LW\/PH\uff1b<\/p>\n

J2,K2\u7528\u4e8e\u6d4b\u91cf\u4e2d\u5fc3\u7684\u5782\u76f4\u5206\u8fa8\u7387,\u6700\u9ad8\u53ef\u8fbe4000LW\/PH\uff1b<\/p>\n

JD,KD\u7528\u4e8e\u6d4b\u91cf\u659c45\u5ea6\u7684\u5206\u8fa8\u7387,\u6700\u9ad8\u53ef\u8fbe2000LW\/PH\uff1b<\/p>\n

\u6b64\u5916\u56db\u89d2\u5341\u5b57\u5f62\u5355\u5143\u53ef\u7528\u4e8e\u6d4b\u91cf\u56db\u89d2\u7684\u6c34\u5e73\u53ca\u5782\u76f4\u5206\u8fa8\u7387\u3002<\/p>\n

\u62cd\u6444\u65f6\u4f7f\u5361\u7684\u4e0a\u4e0b\u8fb9\u4e0e\u76f8\u673a\u53d6\u666f\u5668\u7684\u4e0a\u4e0b\u8fb9\u6846\u5bf9\u9f50\uff0c\u62cd\u6444\u540e\u53ef\u7528\u4e13\u7528\u8f6f\u4ef6\uff08\u5982HYRes\uff09\u6216\u76ee\u6d4b\u627e\u51fa\u56fe\u50cf\u4e2d\u7ebf\u6761\u7684\u53ef\u5206\u8fa8\u7684\u8d77\u59cb\u4f4d\u7f6e\uff0c\u5728\u5176<\/p>\n

<\/p>\n

\u8fb9\u4e0a\u7684\u6570\u5b57\u4e58\u4ee5100\u5c31\u662fLW\/PH\u3002\u8fd9\u79cd\u6d4b\u8bd5\u65b9\u6cd5\u64cd\u4f5c\u7b80\u5355\uff0c\u4f7f\u7528\u65b9\u4fbf\uff0c\u53ea\u8981\u4e00\u5f20\u6d4b\u8bd5\u5361\uff0c\u4e0d\u9700\u8981\u4e13\u95e8\u7684\u8bbe\u5907\u3002<\/p>\n

\u6b64\u5916\u6709\u4e9b\u516c\u53f8\u5982Imatest\u63d0\u4f9b\u4e13\u7528\u7684\u6d4b\u8bd5\u8f6f\u4ef6\u548c\u6d4b\u8bd5\u5361\uff0c\u5176\u4e2d\u4e5f\u6709\u955c\u5934\u4e0e\u673a\u8eab\u7ec4\u5408\u7684\u5206\u8fa8\u7387\u6d4b\u8bd5\uff0c\u53ef\u7528\u56fe\u8868\u8f93\u51faLW\/PH\u6d4b\u8bd5\u7ed3\u679c\u3002<\/p>\n

<\/p>\n

\u4e0a\u56fe\u662fNikon AF-S 50mm f1.4 \u955c\u5934\u5728Nikon D3X\u673a\u8eab\u4e0a\u7684\u6d4b\u8bd5\u7ed3\u679c\uff0c\u5b83\u7ed9\u51fa\u4e86\u4e0d\u540c\u5149\u5708\u4e0b\u955c\u5934\u4e2d\u592e\u53ca\u5468\u8fb9\u56db\u89d2\u7684\u5206\u8fa8\u7387\u3002D3X\u4f20\u611f\u5668\u67092572\u4e07\u50cf\u7d20\uff0c\u5176\u7eb5\u5411\u5206\u8fa8\u7387\u662f4032\uff0c\u6d4b\u8bd5\u5f97\u5230\u7684\u6700\u9ad8\u5206\u8fa8\u7387\u662f\u5728\u5149\u5708F4.0\u65f6\u4e3a3926LW\/PH\uff0c\u5df2\u7ecf\u5f88\u63a5\u8fd14032\u4e86\uff0c\u56fe\u4e2d\u8fd8\u6307\u51fa\u8d85\u8fc73460\u662f\u5c5e\u7b49\u7ea7\u4f18\u3002<\/p>\n

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<\/p>\n

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\u4e0e5D MarkII \u56fa\u6709\u7684\u50cf\u6570\u76f8\u5dee\u8f83\u5927\uff0c\u8bf4\u660eSigma \u8981\u4e0e5DMarkII<\/p>\n

\u76f8\u914d\u8fd8\u4e0d\u591f\u597d\u3002<\/p>\n

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\u5e45\u8981\u6bd418M \u7684\u534a\u753b\u5e45\u8fd8\u8981\u6e05\u6670\u201d\u3002<\/p>\n

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