{"product_id":"mse-pro-bk7-bi-concave-lenses-with-1-4-wave-mgf-sub-2-sub-coating-550nm-o40mm","title":"MSE PRO BK7 Bi-Concave Lenses with 1\/4 Wave MgF\u003csub\u003e2\u003c\/sub\u003e Coating@550nm, Ø40mm","description":"\u003ch2\u003e\n\u003cstrong\u003eMSE PRO\u003c\/strong\u003e\u003cstrong data-mce-fragment=\"1\"\u003e™\u003c\/strong\u003e BK7 Bi-Concave Lenses with 1\/4 Wave \u003c\/h2\u003e\n\u003ch2\u003eMgF\u003csub\u003e2\u003c\/sub\u003e Coating@550nm, Ø40mm\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMSE supplies\u003c\/strong\u003e \u003cspan data-mce-fragment=\"1\"\u003eoffers Ø40mm BK7 Bi-Concave Lenses with 1\/4 Wave \u003cspan\u003eMgF\u003c\/span\u003e\u003csub\u003e2\u003c\/sub\u003e Coating@550nm. S\u003cspan\u003eimilar to plano- concave lenses, a bi-concave lens diverges parallel input rays and has a negative focal length. It has a virtual focus at the object side of the lens. Bi-concave lenses are usually suitable for absolute conjugate ratios closer to 1:1.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eMSE Supplies can offer a variety of optical elements, with different focal length and coating options. Please \u003ca href=\"https:\/\/www.msesupplies.com\/pages\/contact-us-page\" rel=\"noopener\" target=\"_blank\" data-mce-href=\"https:\/\/www.msesupplies.com\/pages\/contact-us-page\"\u003econtact us\u003c\/a\u003e for customization or bulk orders. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan data-mce-fragment=\"1\"\u003eTechnical Data:\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable style=\"height: 372.282px; width: 100%;\" width=\"537\" data-mce-style=\"height: 372.282px; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 8.03976px;\" data-mce-style=\"height: 8.03976px;\"\u003e\n\u003ctd style=\"height: 8.03976px;\" data-mce-style=\"height: 8.03976px;\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eMaterial\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"height: 8.03976px;\" data-mce-style=\"height: 8.03976px;\"\u003e\u003cspan\u003eBK7 grade A, fine annealed\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\" data-mce-style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 48.7759%; height: 19.5938px;\" data-mce-style=\"width: 48.7759%; height: 19.5938px;\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDiameter (Ø) Tolerance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.8475%; height: 19.5938px;\" data-mce-style=\"width: 50.8475%; height: 19.5938px;\"\u003e\u003cspan\u003e+0.0\/-0.20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\" data-mce-style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 48.7759%; height: 19.5938px;\" data-mce-style=\"width: 48.7759%; height: 19.5938px;\"\u003eCenter Thickness (Tc)\u003c\/td\u003e\n\u003ctd style=\"width: 50.8475%; height: 19.5938px;\" data-mce-style=\"width: 50.8475%; height: 19.5938px;\"\u003e\u003cspan\u003e±0.1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 8.03976px;\" data-mce-style=\"height: 8.03976px;\"\u003e\n\u003ctd style=\"height: 8.03976px;\" data-mce-style=\"height: 8.03976px;\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCentration\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"height: 8.03976px;\" data-mce-style=\"height: 8.03976px;\"\u003e\u003cspan\u003e3’\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 18px;\" data-mce-style=\"height: 18px;\"\u003e\n\u003ctd style=\"height: 18px;\" data-mce-style=\"height: 18px;\"\u003eForm Error\u003c\/td\u003e\n\u003ctd style=\"height: 18px;\" data-mce-style=\"height: 18px;\"\u003e\u003cspan\u003e1 ～ 5 fringes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\" data-mce-style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 48.7759%; height: 19.5938px;\" data-mce-style=\"width: 48.7759%; height: 19.5938px;\"\u003e\u003cspan\u003eIrregularity of Fringes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.8475%; height: 19.5938px;\" data-mce-style=\"width: 50.8475%; height: 19.5938px;\"\u003e\u003cspan\u003e0.2 ～ 0.5 fringes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 18px;\" data-mce-style=\"height: 18px;\"\u003e\n\u003ctd style=\"height: 18px;\" data-mce-style=\"height: 18px;\"\u003eSurface Quality\u003c\/td\u003e\n\u003ctd style=\"height: 18px;\" data-mce-style=\"height: 18px;\"\u003e\u003cspan\u003e60-40 scratch-dig\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\" data-mce-style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 48.7759%; height: 19.5938px;\" data-mce-style=\"width: 48.7759%; height: 19.5938px;\"\u003e\u003cspan\u003eClear Aperture\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.8475%; height: 19.5938px;\" data-mce-style=\"width: 50.8475%; height: 19.5938px;\"\u003e\u003cspan\u003e90% diameter\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7785\/files\/010401..jpg?v=1724412180\" width=\"552\" height=\"414\"\u003e\u003c\/p\u003e","brand":"MSE Supplies","offers":[{"title":"-100","offer_id":40590082965562,"sku":"ACB7BC5-40--100","price":65.95,"currency_code":"USD","in_stock":true},{"title":"-150","offer_id":40590082998330,"sku":"ACB7BC5-40--150","price":65.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7785\/files\/Bi-Concave_fc76519e-d987-488c-b2d6-865eae880235.jpg?v=1724834247","url":"https:\/\/www.msesupplies.com\/en-de\/products\/mse-pro-bk7-bi-concave-lenses-with-1-4-wave-mgf-sub-2-sub-coating-550nm-o40mm","provider":"MSE Supplies","version":"1.0","type":"link"}