{"id":3482,"date":"2024-07-09T00:00:00","date_gmt":"2024-07-09T00:00:00","guid":{"rendered":"https:\/\/ledrhythm.com\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html"},"modified":"2025-08-21T06:00:19","modified_gmt":"2025-08-21T06:00:19","slug":"how-to-look-at-the-beam-angle-of-outdoor-floodlights","status":"publish","type":"post","link":"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html","title":{"rendered":"\u30d3\u30fc\u30e0\u89d2\u306e\u8a08\u7b97\u65b9\u6cd5\u3092\u77e5\u3063\u3066\u3044\u307e\u3059\u304b\uff1f"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"3482\" class=\"elementor elementor-3482\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ad1bfb e-flex e-con-boxed e-con e-parent\" data-id=\"3ad1bfb\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6a0a912 elementor-widget elementor-widget-heading\" data-id=\"6a0a912\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u30c8\u30b0\u30eb\u76ee\u6b21\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html\/#Introduction\" >\u306f\u3058\u3081\u306b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html\/#What_is_Beam_Angle\" >\u30d3\u30fc\u30e0\u89d2\u3068\u306f\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html\/#Beam_Angle_Calculator%E2%80%8B\" >\u30d3\u30fc\u30e0\u89d2\u8a08\u7b97\u6a5f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html\/#How_to_choose_right_beam_angle\" >\u6b63\u3057\u3044\u30d3\u30fc\u30e0\u89d2\u306e\u9078\u3073\u65b9\u306f\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html\/#Conclusion\" >\u7d50\u8ad6<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ledrhythm.com\/ja\/news\/how-to-look-at-the-beam-angle-of-outdoor-floodlights.html\/#People_Also_Ask\" >\u4eba\u3005\u306f\u3053\u3046\u3082\u5c0b\u306d\u308b<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>\u306f\u3058\u3081\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aba5b03 elementor-widget elementor-widget-text-editor\" data-id=\"aba5b03\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u6295\u5149\u5668\u306b\u3064\u3044\u3066\u300c\u30d3\u30fc\u30e0\u89d2\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u3088\u304f\u8033\u306b\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30d3\u30fc\u30e0\u89d2\u306b\u3064\u3044\u3066\u672c\u5f53\u306b\u7406\u89e3\u3057\u3066\u3044\u307e\u3059\u304b\uff1f\u306a\u305c\u7167\u660e\u306e\u7167\u5c04\u7bc4\u56f2\u3084\u5747\u4e00\u6027\u306b\u3068\u3063\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30d3\u30fc\u30e0\u89d2\u306e\u6982\u5ff5\u3068\u8a08\u7b97\u5f0f\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-114c8ae elementor-widget elementor-widget-heading\" data-id=\"114c8ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"What_is_Beam_Angle\"><\/span>\u30d3\u30fc\u30e0\u89d2\u3068\u306f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-620492a e-con-full e-flex e-con e-child\" data-id=\"620492a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-da14247 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"da14247\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u30d3\u30fc\u30e0\u89d2\u3068\u306f\u3001\u30e9\u30f3\u30d7\u304b\u3089\u653e\u5c04\u3055\u308c\u308b\u5149\u7dda\u306e\u5e45\u3084\u5e83\u304c\u308a\u3092\u6307\u3059\u3002\u5149\u304c\u6700\u5927\u5149\u91cf\u3092\u767a\u3059\u308b\u7dda\u306f\u5149\u8ef8\u3068\u547c\u3070\u308c\u308b\u3002<\/p><ul><li><strong>B50%\uff08FWHM\u3001\u534a\u5024\u5168\u5e45\uff09<\/strong><br \/>\u3053\u308c\u306f\u3001\u56fd\u969b\u7684\u306b\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u30d3\u30fc\u30e0\u89d2\u306e\u5b9a\u7fa9\u3067\u3059\u3002\u30e9\u30f3\u30d7\u306e\u5149\u8ef8\u5e73\u9762\u4e0a\u3067\u5149\u5f37\u5ea6\u304c\u6700\u5927\u5f37\u5ea6\u306e50%\u307e\u3067\u4f4e\u4e0b\u3059\u308b2\u65b9\u5411\u306e\u9593\u306e\u89d2\u5ea6\u304c\u30d3\u30fc\u30e0\u89d2\u3067\u3059\u3002<\/li><li><strong>B10%<\/strong><br \/>\u5149\u5ea6\u304c\u6700\u5927\u5149\u5ea6\u306e10%\u307e\u3067\u4f4e\u4e0b\u3059\u308b\u3001\u7167\u660e\u5668\u5177\u306e\u5149\u8ef8\u4e0a\u306e2\u65b9\u5411\u9593\u306e\u89d2\u5ea6\u3002\u30e1\u30fc\u30ab\u30fc\u306b\u3088\u3063\u3066\u306f\u3001B10%\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee16d8e elementor-widget elementor-widget-image\" data-id=\"ee16d8e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"828\" height=\"677\" src=\"https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/what-is-beam-angle.webp\" class=\"attachment-large size-large wp-image-6898\" alt=\"\u30d3\u30fc\u30e0\u89d2\u3068\u306f\" srcset=\"https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/what-is-beam-angle.webp 828w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/what-is-beam-angle-300x245.webp 300w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/what-is-beam-angle-768x628.webp 768w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/what-is-beam-angle-15x12.webp 15w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/what-is-beam-angle-700x572.webp 700w\" sizes=\"(max-width: 828px) 100vw, 828px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-751d526 elementor-widget elementor-widget-text-editor\" data-id=\"751d526\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u4f8b\u3048\u3070\u7167\u660e\u5668\u5177\u306e\u4e2d\u5fc3\u5149\u5ea6\u304c10,000 cd\u306e\u5834\u5408\u3002<\/p><ul><li>\u5149\u5ea6\u306f0\u00b0\u3067\u6700\u5927\uff0810,000 cd\uff09\u3002<\/li><li>30\u00b0\u3067\u306e\u5149\u5ea6\u306f5,000cd\u3002<\/li><li>45\u00b0\u3067\u306e\u5149\u5ea6\u306f1,000cd\u3002<\/li><\/ul><p>\u3064\u307e\u308a\u30d3\u30fc\u30e0\u89d2\u306fB50%\u306e\u30d3\u30fc\u30e0\u89d2\uff1d60\u00b0\uff08-30\u00b0\u304b\u3089+30\u00b0\u306b\u306a\u308b\u305f\u3081\uff09\u3001B10%\u306e\u30d3\u30fc\u30e0\u89d2\uff1d90\u00b0\uff08-45\u00b0\u304b\u3089+45\u00b0\u306b\u306a\u308b\u305f\u3081\uff09\u3002<\/p><table style=\"width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; text-align: center;\"><thead><tr><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u30ab\u30c6\u30b4\u30ea\u30fc<\/th><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u5178\u578b\u7684\u306a\u7bc4\u56f2 (\u00b0)<\/th><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/th><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u7279\u5fb4<\/th><\/tr><\/thead><tbody><tr style=\"background: #f8fafc;\"><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u72ed\u3044<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">10\u00b0-30\u00b0<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30d5\u30a1\u30b5\u30fc\u30c9\u3001\u5f6b\u50cf\u3001\u9060\u8ddd\u96e2\u30d5\u30a9\u30fc\u30ab\u30b9<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u9ad8\u8f1d\u5ea6\u3001\u30b7\u30e3\u30fc\u30d7\u306a\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3001\u5c0f\u9762\u7a4d<\/td><\/tr><tr><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30df\u30c7\u30a3\u30a2\u30e0<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">30\u00b0-60\u00b0<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30a8\u30f3\u30c8\u30e9\u30f3\u30b9\u3001\u4e2d\u5ead\u3001\u6b69\u9053<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30d0\u30e9\u30f3\u30b9\u306e\u3068\u308c\u305f\u30ab\u30d0\u30ec\u30c3\u30b8\u3068\u660e\u308b\u3055<\/td><\/tr><tr style=\"background: #f8fafc;\"><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30ef\u30a4\u30c9<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">60\u00b0-120\u00b0<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u99d0\u8eca\u5834\u3001\u5009\u5eab\u3001\u904b\u52d5\u5834<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30ef\u30a4\u30c9\u30a8\u30ea\u30a2\u3001\u5747\u4e00\u306a\u5149\u3001\u4f4e\u30bb\u30f3\u30bf\u30fc\u30eb\u30af\u30b9<\/td><\/tr><\/tbody><tfoot><tr><td style=\"padding: 8px; border: 1px solid #e5e7eb; font-size: 12px; color: #555;\" colspan=\"4\">\u6ce8\uff1a\u7bc4\u56f2\u306f\u4ee3\u8868\u5024\u3002\u30d3\u30fc\u30e0\u89d2\u306f\u901a\u5e38B50%\uff08FWHM\uff09\u3067\u5b9a\u7fa9\u3002<\/td><\/tr><\/tfoot><\/table><p><img decoding=\"async\" class=\"size-full wp-image-6901 aligncenter\" src=\"https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/various-beam-angle-linear-light.webp\" alt=\"\u30d3\u30fc\u30e0\u89d2\u8a08\u7b97\u6a5f\" width=\"850\" height=\"245\" srcset=\"https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/various-beam-angle-linear-light.webp 850w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/various-beam-angle-linear-light-300x86.webp 300w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/various-beam-angle-linear-light-768x221.webp 768w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/various-beam-angle-linear-light-18x5.webp 18w, https:\/\/ledrhythm.com\/wp-content\/uploads\/2024\/07\/various-beam-angle-linear-light-700x202.webp 700w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd25dee elementor-widget elementor-widget-heading\" data-id=\"bd25dee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Beam_Angle_Calculator%E2%80%8B\"><\/span>\u30d3\u30fc\u30e0\u89d2\u8a08\u7b97\u6a5f<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a2c5a7 elementor-widget elementor-widget-text-editor\" data-id=\"3a2c5a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u79c1\u305f\u3061\u304c\u4f7f\u7528\u3059\u308b\u30d3\u30fc\u30e0\u89d2\u8a08\u7b97\u6a5f\u306f\u3001\u65e2\u77e5\u306e\u30d3\u30fc\u30e0\u89d2\u306b\u57fa\u3065\u3044\u3066\u7167\u5c04\u7bc4\u56f2\u3068\u8a2d\u7f6e\u9ad8\u3055\u3092\u63a8\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30d3\u30fc\u30e0\u89d2\u304c\u5149\u5b66\u7684\u306a\u6e2c\u5b9a\u5024\u3067\u3042\u308a\u3001\u30e1\u30fc\u30ab\u30fc\u304c\u5b9f\u9a13\u5ba4\u3067\u6e2c\u5b9a\u3057\u3001\u88fd\u54c1\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3067\u3059\u3002<\/p><p><strong>\u30d3\u30fc\u30e0\u89d2\u8a08\u7b97\u5f0fD = tan (\u03b8 \/ 2) \u00d7 L<\/strong><\/p><p>\u3068\u3044\u3046\u610f\u5473\u3060\uff1a<\/p><ul><li>D = \u7167\u5c04\u30a8\u30ea\u30a2\u306e\u534a\u5f84<\/li><li>\u03b8 = \u30d3\u30fc\u30e0\u89d2\u5ea6<\/li><li>L = \u53d6\u308a\u4ed8\u3051\u9ad8\u3055<\/li><\/ul><p>\u8a08\u7b97\u4f8b\u7167\u660e\u304c\u9ad8\u30555m\u306b\u8a2d\u7f6e\u3055\u308c\u3001\u30d3\u30fc\u30e0\u89d2\u304c60\u00b0\u306e\u5834\u5408\uff1a<\/p><ul><li>D = tan(30\u00b0)\u00d75 = 2.89m<\/li><\/ul><p>\u7167\u5c04\u7bc4\u56f2\u304c\u308f\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u306e\u8a2d\u7f6e\u9ad8\u3055\u306e\u8a08\u7b97\u3082\u540c\u69d8\u3067\u3059\u3002\u76f4\u63a5\u8a08\u7b97\u3067\u304d\u308b\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c82aedb elementor-widget elementor-widget-html\" data-id=\"c82aedb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<p>\u30d5\u30a9\u30fc\u30df\u30e5\u30e9\uff1a <strong>D = L \u00d7 tan(\u03b8 \/ 2)<\/strong><\/p>\r\n\r\n<div style=\"display:flex; gap:10px; flex-wrap:wrap; margin-bottom:10px;\">\r\n  <div style=\"flex:1; min-width:100px;\">\r\n    <label>\u53d6\u308a\u4ed8\u3051\u9ad8\u3055 (L)\uff1a<\/label><br>\r\n    <input type=\"number\" id=\"height\" placeholder=\"\u9ad8\u3055\u3092\u5165\u529b\" step=\"0.01\" style=\"width:100%;\">\r\n  <\/div>\r\n\r\n  <div style=\"flex:1; min-width:100px;\">\r\n    <label>\u30d3\u30fc\u30e0\u89d2\uff08\u03b8\u3001\u5358\u4f4d\u306f\u5ea6\uff09\uff1a<\/label><br>\r\n    <input type=\"number\" id=\"angle\" placeholder=\"\u89d2\u5ea6\u3092\u5165\u529b\" step=\"0.1\" style=\"width:100%;\">\r\n  <\/div>\r\n\r\n  <div style=\"flex:1; min-width:100px;\">\r\n    <label>\u30e6\u30cb\u30c3\u30c8<\/label><br>\r\n    <select id=\"unit\" style=\"width:100%;\">\r\n      <option value=\"m\">\u30e1\u30fc\u30c8\u30eb\uff08m\uff09<\/option>\r\n      <option value=\"ft\">\u30d5\u30a3\u30fc\u30c8\uff08ft\uff09<\/option>\r\n    <\/select>\r\n  <\/div>\r\n\r\n  <div style=\"flex:1; min-width:100px; display:flex; align-items:flex-end;\">\r\n    <button onclick=\"calculate()\" style=\"width:100%;\">\u8a08\u7b97\u3059\u308b<\/button>\r\n  <\/div>\r\n<\/div>\r\n\r\n<div class=\"result\" id=\"output\" style=\"margin-top:10px;\"><\/div>\r\n\r\n<script>\r\nfunction calculate() {\r\n  \/\/ \u83b7\u53d6\u7528\u6237\u8f93\u5165\r\n  const L = parseFloat(document.getElementById('height').value);\r\n  const theta = parseFloat(document.getElementById('angle').value);\r\n  const unit = document.getElementById('unit').value;\r\n\r\n  \/\/ \u9a8c\u8bc1\u8f93\u5165\r\n  if (isNaN(L) || isNaN(theta) || L <= 0 || theta <= 0) {\r\n    document.getElementById('output').innerText = \"\u26a0\ufe0f Please enter valid values.\";\r\n    return;\r\n  }\r\n\r\n  \/\/ \u8ba1\u7b97\u534a\u5f84\u548c\u76f4\u5f84\r\n  const radians = theta * Math.PI \/ 180;  \r\n  const radius = L * Math.tan(radians \/ 2);\r\n  const diameter = 2 * radius;\r\n\r\n  \/\/ \u8f93\u51fa\u7ed3\u679c\r\n  document.getElementById('output').innerHTML =\r\n    `Beam radius \u2248 <b>${radius.toFixed(2)} ${unit}<\/b><br>\r\n     Beam diameter \u2248 <b>${diameter.toFixed(2)} ${unit}<\/b>`;\r\n}\r\n<\/script>\r\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1fe0933 elementor-widget elementor-widget-heading\" data-id=\"1fe0933\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"How_to_choose_right_beam_angle\"><\/span>\u6b63\u3057\u3044\u30d3\u30fc\u30e0\u89d2\u306e\u9078\u3073\u65b9\u306f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b70603 elementor-widget elementor-widget-text-editor\" data-id=\"0b70603\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>\u7167\u660e\u306e\u5fc5\u8981\u6027<\/strong><\/p><ul><li>\u5f6b\u523b\u3084\u7d75\u753b\u3092\u969b\u7acb\u305f\u305b\u308b\uff08\u30a2\u30af\u30bb\u30f3\u30c8\u7167\u660e\uff09\uff1a\u72ed\u3044\u30d3\u30fc\u30e0\uff0815\u00b0\uff5e24\u00b0\uff09\u3092\u9078\u3073\u307e\u3059\u3002<\/li><li>\u58c1\u3084\u7d75\u753b\u3092\u7167\u3089\u3059\uff08\u30a6\u30a9\u30fc\u30eb\u30a6\u30a9\u30c3\u30b7\u30e5\u7167\u660e\uff09\uff1a\u30df\u30c7\u30a3\u30a2\u30e0\u30d3\u30fc\u30e0\uff0824\u00b0\uff5e36\u00b0\uff09\u3092\u9078\u3073\u307e\u3059\u3002<\/li><li>\u57fa\u672c\u7684\u306a\u7a7a\u9593\u7167\u660e\u3084\u5eca\u4e0b\u306e\u7167\u660e\u306b\uff1a\u30df\u30c7\u30a3\u30a2\u30e0\u30ef\u30a4\u30c9\u30d3\u30fc\u30e0\uff0836\u00b0\uff5e45\u00b0\uff09\u3092\u304a\u9078\u3073\u304f\u3060\u3055\u3044\u3002<\/li><li>\u90e8\u5c4b\u5168\u4f53\u3092\u7167\u3089\u3059\uff08\u30a2\u30f3\u30d3\u30a8\u30f3\u30c8\u7167\u660e\uff09\uff1a\u30ef\u30a4\u30c9\u30d3\u30fc\u30e0\uff0860\u00b0\u4ee5\u4e0a\uff09\u3092\u9078\u3073\u307e\u3059\u3002<\/li><li>\u5c4b\u5916\u306e\u5e83\u3044\u7bc4\u56f2\u3092\u7167\u3089\u3059\u306b\u306f\u8d85\u5e83\u89d2\u30d3\u30fc\u30e0\uff0890\u00b0\u4ee5\u4e0a\uff09\u306e\u6295\u5149\u5668\u3092\u9078\u3076\u3002<\/li><\/ul><p><strong>\u7167\u5c04\u8ddd\u96e2<\/strong><\/p><p>\u5149\u6e90\u304c\u88ab\u7167\u5c04\u7269\u304b\u3089\u9060\u3051\u308c\u3070\u9060\u3044\u307b\u3069\u3001\u540c\u3058\u30b9\u30dd\u30c3\u30c8\u30b5\u30a4\u30ba\u3092\u4f5c\u308a\u51fa\u3059\u306e\u306b\u5fc5\u8981\u306a\u30d3\u30fc\u30e0\u89d2\u306f\u72ed\u304f\u306a\u308b\u3002<\/p><table style=\"width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; text-align: center;\"><thead><tr><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u7533\u3057\u8fbc\u307f<\/th><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u63a8\u5968\u30d3\u30fc\u30e0\u89d2\u5ea6<\/th><th style=\"background: #253D96; color: #ffffff; padding: 10px; font-weight: 600; border: 1px solid #e5e7eb;\">\u7406\u7531<\/th><\/tr><\/thead><tbody><tr style=\"background: #f8fafc;\"><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30a2\u30fc\u30c8\u4f5c\u54c1\u3084\u5f6b\u50cf\u306b\u30b9\u30dd\u30c3\u30c8\u30e9\u30a4\u30c8\u3092\u5f53\u3066\u308b<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">10\u00b0\uff5e30\u00b0\uff08\u30ca\u30ed\u30fc\uff09<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u72ed\u3044\u7bc4\u56f2\u306b\u5149\u3092\u96c6\u4e2d\u3055\u305b\u3001\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u3092\u3064\u3051\u308b<\/td><\/tr><tr><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u4e00\u822c\u7684\u306a\u90e8\u5c4b\u3084\u5eca\u4e0b\u306e\u7167\u660e<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">30\u00b0\uff5e60\u00b0\uff08\u30df\u30c7\u30a3\u30a2\u30e0\uff09<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u30d0\u30e9\u30f3\u30b9\u306e\u3068\u308c\u305f\u30ab\u30d0\u30ec\u30c3\u30b8\u3068\u660e\u308b\u3055<\/td><\/tr><tr style=\"background: #f8fafc;\"><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u99d0\u8eca\u5834\u3001\u904b\u52d5\u5834\u3001\u5009\u5eab<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">60\u00b0\uff5e120\u00b0\uff08\u30ef\u30a4\u30c9\uff09<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u5e83\u3044\u7bc4\u56f2\u3092\u5747\u4e00\u306b\u7167\u3089\u3057\u3001\u5f71\u3092\u6e1b\u3089\u3059<\/td><\/tr><tr><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u68da\u3084\u9673\u5217\u30b1\u30fc\u30b9\u306e\u30a2\u30af\u30bb\u30f3\u30c8\u7167\u660e<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">20\u00b0\uff5e40\u00b0\uff08\u30ca\u30ed\u30fc\uff5e\u30df\u30c7\u30a3\u30a2\u30e0\uff09<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u5149\u3092\u3053\u307c\u3055\u305a\u306b\u88fd\u54c1\u3092\u5f37\u8abf\u3059\u308b<\/td><\/tr><tr style=\"background: #f8fafc;\"><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u5c4b\u5916\u306e\u5ead\u5712\u3084\u666f\u89b3\u306e\u7167\u660e<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">30\u00b0\uff5e90\u00b0\uff08\u30df\u30c7\u30a3\u30a2\u30e0\uff5e\u30ef\u30a4\u30c9\uff09<\/td><td style=\"padding: 10px; border: 1px solid #e5e7eb;\">\u690d\u7269\u3084\u5c0f\u9053\u3092\u30bd\u30d5\u30c8\u3067\u5747\u4e00\u306b\u7167\u3089\u3059<\/td><\/tr><\/tbody><tfoot><tr><td style=\"padding: 8px; border: 1px solid #e5e7eb; font-size: 12px; color: #555;\" colspan=\"3\">\u6ce8\uff1a\u30d3\u30fc\u30e0\u89d2\u306f\u304a\u304a\u3088\u305d\u306e\u76ee\u5b89\u3067\u3059\u3002\u5929\u4e95\u306e\u9ad8\u3055\u3068\u30a8\u30ea\u30a2\u306e\u5927\u304d\u3055\u306b\u5fdc\u3058\u3066\u304a\u9078\u3073\u304f\u3060\u3055\u3044\u3002<\/td><\/tr><\/tfoot><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9cdbc0a elementor-widget elementor-widget-heading\" data-id=\"9cdbc0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>\u7d50\u8ad6<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b7797cf elementor-widget elementor-widget-text-editor\" data-id=\"b7797cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u30d3\u30fc\u30e0\u89d2\u306f\u3001\u5149\u306e\u5f62\u3068\u5e83\u304c\u308a\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u30d3\u30fc\u30e0\u89d2\u3092\u7406\u89e3\u3057\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u826f\u3044\u7167\u660e\u4f53\u9a13\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30e9\u30f3\u30d7\u3092\u9078\u3076\u969b\u306b\u306f\u3001\u30ef\u30c3\u30c8\u6570\uff08\u660e\u308b\u3055\uff09\u3084\u8272\u6e29\u5ea6\uff08\u8272\uff09\u3060\u3051\u3067\u306a\u304f\u3001\u30d3\u30fc\u30e0\u89d2\u306b\u6ce8\u76ee\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p><p>\u5f53\u793e\u306f\u3001\u5de5\u696d\u7528\u304a\u3088\u3073\u5546\u696d\u7528LED\u7167\u660e\u306e\u5c02\u9580\u30e1\u30fc\u30ab\u30fc\u3067\u3059\u3002\u5f53\u793e\u306e\u7167\u660e\u5668\u5177\u306f\u3001\u69d8\u3005\u306a\u7167\u5c04\u89d2\u5ea6\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002 <a href=\"https:\/\/ledrhythm.com\/ja\/guestbook\/\" target=\"_blank\" rel=\"noopener\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a> \u7167\u660e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e1d1c8 elementor-widget elementor-widget-heading\" data-id=\"2e1d1c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"People_Also_Ask\"><\/span>\u4eba\u3005\u306f\u3053\u3046\u3082\u5c0b\u306d\u308b<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f9b6c92 elementor-widget elementor-widget-n-accordion\" data-id=\"f9b6c92\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;expanded&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"\u30a2\u30b3\u30fc\u30c7\u30a3\u30aa\u30f3Enter\u30ad\u30fc\u307e\u305f\u306fSpace\u30ad\u30fc\u3067\u30ea\u30f3\u30af\u3092\u958b\u304d\u3001Escape\u30ad\u30fc\u3067\u9589\u3058\u3001\u77e2\u5370\u30ad\u30fc\u3067\u79fb\u52d5\u3057\u307e\u3059\u3002\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2610\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-2610\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> \u30d3\u30fc\u30e0\u89d2\u306e\u6e2c\u5b9a\u65b9\u6cd5\u306f\uff1f <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2610\" class=\"elementor-element elementor-element-fe40a65 e-con-full e-flex e-con e-child\" data-id=\"fe40a65\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-154bf1a elementor-widget elementor-widget-text-editor\" data-id=\"154bf1a\" data-element_type=\"widget\" data-e-type=\"widget\" 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