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How not to focus a small source with a single lens

 

作者: William S. Heaps,  

 

期刊: American Journal of Physics  （AIP Available online 1987）
卷期: Volume 55, issue 10  

页码: 888-890

 

ISSN:0002-9505

 

年代: 1987

 

DOI:10.1119/1.14947

 

出版商: American Association of Physics Teachers

 

关键词: LENSES;FOCUSING;IMAGES

 

数据来源: AIP

 

摘要:

It has been observed that when focusing a small finite source onto a fixed image plane with a single lens, the focus position does not necessarily correspond to the minimum imaged spot size. A simple analysis of this situation illuminates conditions under which it may arise.

 

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