{"id":2558,"date":"2025-10-06T18:53:48","date_gmt":"2025-10-06T09:53:48","guid":{"rendered":"https:\/\/www.katsura-opto.com\/?post_type=case&#038;p=2558"},"modified":"2025-11-21T14:11:15","modified_gmt":"2025-11-21T05:11:15","slug":"%e7%b2%97%e9%9d%a2%e3%81%ae%e7%b2%be%e5%af%86%e8%a7%92%e5%ba%a6%e6%b8%ac%e5%ae%9a","status":"publish","type":"case","link":"https:\/\/www.katsura-opto.com\/en\/case\/%e7%b2%97%e9%9d%a2%e3%81%ae%e7%b2%be%e5%af%86%e8%a7%92%e5%ba%a6%e6%b8%ac%e5%ae%9a","title":{"rendered":"Precision Angle Measurement on Rough Surfaces"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"881\" height=\"428\" src=\"https:\/\/www.katsura-opto.com\/wp-content\/uploads\/2025\/10\/Rough_surface_EN.jpg\" alt=\"\" class=\"wp-image-2560\" srcset=\"https:\/\/www.katsura-opto.com\/wp-content\/uploads\/2025\/10\/Rough_surface_EN.jpg 881w, https:\/\/www.katsura-opto.com\/wp-content\/uploads\/2025\/10\/Rough_surface_EN-300x146.jpg 300w, https:\/\/www.katsura-opto.com\/wp-content\/uploads\/2025\/10\/Rough_surface_EN-768x373.jpg 768w\" sizes=\"(max-width: 881px) 100vw, 881px\" \/><\/figure>\n\n\n\n<p class=\"has-red-color has-text-color has-link-color wp-elements-c218dfbe71af6ffe8276c11a8b8a1432\"><strong><strong>\u30fbIssues<\/strong><\/strong><\/p>\n\n\n\n<p>Is there a method to measure the angle of a rough, machined surface\u2014not a mirror-like surface\u2014using a laser autocollimator?<\/p>\n\n\n\n<p class=\"has-green-color has-text-color has-link-color wp-elements-ccbefafd3b8edaa03039a455dd78b80d\"><strong><strong>\u30fbSolutions<\/strong><\/strong><\/p>\n\n\n\n<p>On unpolished metal surfaces, laser light is usually scattered, making accurate measurement with a laser autocollimator difficult. However, by applying a thin, lightweight glass plate, such as a cover glass, onto the metal surface with one side coated with water or oil\u2014a technique known as \u201cwetting\u201d\u2014an optically flat measurement surface can be formed, allowing measurement with a laser autocollimator.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u672a\u7814\u78e8\u91d1\u5c5e\u9762\u3092\u30aa\u30fc\u30c8\u30b3\u30ea\u30e1\u30fc\u30bf\u30fc\u3067\u6e2c\u5b9a\u3059\u308b\u65b9\u6cd5\u3068\u306f\uff1f\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/3PF3ZZDtWlQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"author":2,"featured_media":2328,"template":"","meta":{"_acf_changed":false,"_locale":"en_US","_original_post":"https:\/\/www.katsura-opto.com\/?post_type=case&p=2327"},"case-cat":[16],"case-tag":[124],"class_list":["post-2558","case","type-case","status-publish","has-post-thumbnail","hentry","case-cat-mechanical-parts","case-tag-metal","en-US"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/case\/2558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/case"}],"about":[{"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/types\/case"}],"author":[{"embeddable":true,"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/users\/2"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/media\/2328"}],"wp:attachment":[{"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/media?parent=2558"}],"wp:term":[{"taxonomy":"case-cat","embeddable":true,"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/case-cat?post=2558"},{"taxonomy":"case-tag","embeddable":true,"href":"https:\/\/www.katsura-opto.com\/wp-json\/wp\/v2\/case-tag?post=2558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}