{"id":824,"date":"2026-07-20T13:56:32","date_gmt":"2026-07-20T13:56:32","guid":{"rendered":"https:\/\/zoephotonics.com\/?post_type=product&#038;p=824"},"modified":"2026-07-23T16:59:51","modified_gmt":"2026-07-23T16:59:51","slug":"bi-concave-spherical-lenses","status":"publish","type":"product","link":"https:\/\/zoephotonics.com\/zh\/product\/bi-concave-spherical-lenses\/","title":{"rendered":"Bi-Concave Spherical Lenses"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-560\" src=\"http:\/\/zoephotonics.com\/wp-content\/uploads\/2026\/06\/\u53cc\u51f9\u900f\u955c-300x198.jpg\" alt=\"\" width=\"300\" height=\"198\" srcset=\"https:\/\/zoephotonics.com\/wp-content\/uploads\/2026\/06\/\u53cc\u51f9\u900f\u955c-300x198.jpg 300w, https:\/\/zoephotonics.com\/wp-content\/uploads\/2026\/06\/\u53cc\u51f9\u900f\u955c-18x12.jpg 18w, https:\/\/zoephotonics.com\/wp-content\/uploads\/2026\/06\/\u53cc\u51f9\u900f\u955c.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Zoe&#8217;s N-BK7, N-SF11, UV-fused silica, calcium fluoride, and zinc selenide bi-concave lenses are popular for many applications. Bi-concave lenses have a negative focal length and are best used to diverge a converging beam. Bi-concave lenses can diverge a collimated beam to a virtual focus and are commonly used in Galilean-type beam expanders.<\/p>","protected":false},"featured_media":741,"template":"","meta":[],"product_brand":[27],"product_cat":[34],"product_tag":[26,38],"class_list":["post-824","product","type-product","status-publish","has-post-thumbnail","product_brand-zoe","product_cat-lens","product_tag-26","product_tag-38","first","instock","taxable","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/product\/824","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/media\/741"}],"wp:attachment":[{"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/media?parent=824"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/product_brand?post=824"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/product_cat?post=824"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/zoephotonics.com\/zh\/wp-json\/wp\/v2\/product_tag?post=824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}