{"product_id":"mse-pro-uncoated-bk7-bi-convex-lenses-o20mm","title":"MSE PRO Uncoated BK7 Bi-Convex Lenses, Ø20mm","description":"\u003ch2\u003e\n\u003cstrong\u003eMSE PRO\u003c\/strong\u003e\u003cstrong data-mce-fragment=\"1\"\u003e™ Uncoated BK7 Bi-Convex Lenses, Ø20mm\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMSE supplies\u003c\/strong\u003e \u003cspan data-mce-fragment=\"1\"\u003eoffers Ø20mm Uncoated BK7 Bi-Convex Lenses. S\u003cspan\u003eimilar to plano-convex lenses, a bi-convex lens has a positive focal length and focuses parallel rays of light to a spot. Because the front and back surface of the lens are spherically convex and have the same radius of curvature, in situations where the object and image are at equal of near equal distances from the lens, it particularly minimizes spherical aberration, at the same time, aberration coma and distortion are also identically canceled. As a guideline, bi-convex lenses offer minimum aberrations at the conjugate radio between 5:1and1:5.\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 rel=\"noopener\" href=\"https:\/\/www.msesupplies.com\/pages\/contact-us-page\" data-mce-href=\"https:\/\/www.msesupplies.com\/pages\/contact-us-page\" target=\"_blank\"\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 width=\"537\" style=\"height: 372.282px; width: 100%;\" data-mce-style=\"height: 372.282px; width: 100%;\"\u003e\n\u003ctbody\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\u003e3 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\u003e0.5 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 height=\"419\" width=\"559\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7785\/files\/010215_1439d407-a4d9-4c11-9ab8-b677e7e45c4d.jpg?v=1724387730\" alt=\"\"\u003e\u003c\/p\u003e","brand":"MSE Supplies","offers":[{"title":"30","offer_id":40589454901306,"sku":"UCB7BV-20-30","price":52.95,"currency_code":"USD","in_stock":true},{"title":"40","offer_id":40589454934074,"sku":"UCB7BV-20-40","price":52.95,"currency_code":"USD","in_stock":true},{"title":"60","offer_id":40589455097914,"sku":"UCB7BV-20-60","price":52.95,"currency_code":"USD","in_stock":true},{"title":"75","offer_id":40589455130682,"sku":"UCB7BV-20-75","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7785\/files\/Bi-Convex_b8d13f5f-3711-43ce-a70f-a7598822ece3.jpg?v=1724832120","url":"https:\/\/www.msesupplies.com\/en-de\/products\/mse-pro-uncoated-bk7-bi-convex-lenses-o20mm","provider":"MSE Supplies","version":"1.0","type":"link"}