作者kramnik (肉松)
看板Physics
标题Re: [请益] 光
时间Mon Aug 3 20:36:00 2009
※ 引述《plokijuhygtf (牛奶人)》之铭言:
: 恳请大大帮我推导这个式子:AΩ=A'Ω'
: A=source area
: Ω=solid angle subtended at the source by the entrance aperture of the optical
: system
: A'=image area
: Ω'=solid angle subtended at the image by the exit aperture
: 麻烦可以的话请写详细一点,感激不尽!Orz....
: 相簿里有图,也有一小段叙述,密码是optical
: http://www.wretch.cc/album/album.php?id=gary0929&book=7
原文有说明..要使上式成立..
1. the optical system is aberration free .
2. the optical system has no internal aperture which limit the beam.
显而易见
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