{"id":1194,"date":"2023-03-21T07:26:48","date_gmt":"2023-03-21T07:26:48","guid":{"rendered":"https:\/\/www.shalomeo.com\/blog\/?p=1194"},"modified":"2023-03-21T07:26:48","modified_gmt":"2023-03-21T07:26:48","slug":"broadband-lightweight-flat-thermal-camera-lenses-for-long-wave-infrared-imaging","status":"publish","type":"post","link":"https:\/\/www.shalomeo.com\/blog\/broadband-lightweight-flat-thermal-camera-lenses-for-long-wave-infrared-imaging\/1194.html","title":{"rendered":"Broadband lightweight flat thermal\u00a0camera lenses for long-wave infrared imaging"},"content":{"rendered":"\n<p>We experimentally demonstrate imaging in the long-wave infrared (LWIR) spectral band (8 \u03bcm to 12 \u03bcm) using a single polymer flat lens based upon multilevel diffractive optics. The device thickness is only 10 \u03bcm, and chromatic aberrations are corrected over the entire LWIR band with one surface. Due to the drastic reduction in device thickness, we are able to utilize polymers with absorption in the LWIR, allowing for inexpensive manufacturing via imprint lithography. The weight of our lens is less than 100 times those of comparable refractive thermal\u00a0camera lenses.<\/p>\n\n\n\n<p>We fabricated and characterized 2 different flat <strong><a href=\"https:\/\/www.shalomeo.com\/Infrared-Optics\/Lens-Modules-8-12-Micro\" target=\"_blank\" rel=\"noreferrer noopener\">thermal\u00a0camera lenses<\/a><\/strong>. Even with about 25% absorption losses, experiments show that our flat polymer thermal\u00a0camera lenses obtain good imaging with field of view of 35\u00b0 and angular resolution less than 0.013\u00b0. The flat thermal\u00a0camera lenses were characterized with 2 different commercial LWIR image sensors.<\/p>\n\n\n\n<p>Finally, we show that, by using lossless, higher-refractive-index materials like silicon, focusing efficiencies in excess of 70% can be achieved over the entire LWIR band. Our results firmly establish the potential for lightweight, ultrathin, broadband thermal&nbsp;camera lenses for high-quality imaging in the LWIR band.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We experimentally demonstrate imaging in the long- &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[252],"_links":{"self":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/posts\/1194"}],"collection":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/comments?post=1194"}],"version-history":[{"count":0,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/posts\/1194\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/media?parent=1194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/categories?post=1194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/tags?post=1194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}