{"id":111,"date":"2006-03-28T14:11:56","date_gmt":"2006-03-28T19:11:56","guid":{"rendered":"http:\/\/photondetector.com\/blog\/2006\/03\/28\/pinhole-size\/"},"modified":"2006-06-22T19:19:53","modified_gmt":"2006-06-23T00:19:53","slug":"pinhole-size","status":"publish","type":"post","link":"https:\/\/photondetector.com\/blog\/2006\/03\/28\/pinhole-size\/","title":{"rendered":"Technical PDF on optimum pinhole sizing"},"content":{"rendered":"
<\/div>\n

Excerpt from by "The Pinhole Camera Revisited or The Revenge of the Simple-Minded Engineer", by Kjell Carlsson:<\/p>\n

"The image of a point object, the Point Spread Function (PSF),
\nshould be as small as possible to produce a sharp image. <\/p>\n

"Geometrical optics approximation: Hole should be as small as possible.<\/p>\n

"Fraunhofer diffraction approximation: Hole should be as large as possible.<\/p>\n

"No optimum size is found! <\/p>\n

"Conclusion: The optimum size is found in a region where neither geometrical optics nor Fraunhofer diffraction is valid!"<\/p>\n

For the more mathematically inclined, this paper discusses the preceeding conundrum and has simulated sample images for various pinhole sizes. I can’t follow the math, but I found it an interesting read nonetheless.<\/p>\n

Download PDF<\/a><\/p>\n

Via f295 DIY Photography Forum<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Excerpt from by "The Pinhole Camera Revisited or The Revenge of the Simple-Minded Engineer", by Kjell Carlsson: "The image of a point object, the Point Spread Function (PSF), should be as small as possible to produce a sharp image. "Geometrical optics approximation: Hole should be as small as possible. "Fraunhofer diffraction approximation: Hole should be […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,13],"tags":[936,1277,1990],"class_list":["post-111","post","type-post","status-publish","format-standard","hentry","category-extra-geeky","category-pinhole","tag-kjell-carlsson","tag-optimum-size","tag-pinhole"],"_links":{"self":[{"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/posts\/111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/comments?post=111"}],"version-history":[{"count":0,"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/posts\/111\/revisions"}],"wp:attachment":[{"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/media?parent=111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/categories?post=111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/photondetector.com\/blog\/wp-json\/wp\/v2\/tags?post=111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}