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gylx1206:幾何光學(xué)書上有 (2011-12-21 09:51) :Bx+WW&P.i
362429208b:tan匯聚角度=長(zhǎng)度一半除以焦距 夠通俗了吧 (2011-12-20 17:20) [TRGIGtq
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小貓悖悖:長(zhǎng)度一半是指透鏡的長(zhǎng)度嗎,還是后焦 (2011-12-23 08:34) <MRC%!.
小貓悖悖:在應(yīng)用光學(xué)上,可以用半孔徑/焦距來(lái)求出一個(gè)角度,乘2就是一個(gè)全角,這個(gè)就是會(huì)聚角度嗎 (2011-12-23 08:33) K@HLIuz4t
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