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Covering lenses and covering images

 

作者: A. M. Kwan,   D. A. Wardle,  

 

期刊: The Physics Teacher  （AIP Available online 1998）
卷期: Volume 36, issue 5  

页码: 314-315

 

ISSN:0031-921X

 

年代: 1998

 

DOI:10.1119/1.880085

 

出版商: American Association of Physics Teachers

 

关键词: vignetting;depth of field;partially covered lenses;optics education

 

数据来源: AIP

 

摘要:

Partially covering a converging lens can produce either vignetted or dimmed real images, depending on how the image is observed. A field lens captures non-paraxial rays, allowing the dimming effect to be observed directly, without using a screen.

 

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