{"product_id":"da051","title":"DA051","description":"\u003ch3 class=\"product-name\"\u003eTarget USAF 1951 Fluorescent 3x3 INCH (POS)\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis enhanced version of the standard 1951 USAF target is uniquely suited to applications using a UV light source. This “Fluorescent” version is patterned on Corning 7980 Fused Silica for enhanced transmission in the UV spectrum (\u0026gt;92% @ 270nm). A UV-sensitive phosphorescent material is applied to the back of the glass substrate. The backing material emits a bright green visible light when exposed to a UV light source. The pattern is printed on the back side of the glass substrate so that the focal plane is in line with the phosphorescent coating.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe pattern frequency is listed in terms of Line Pairs Per Millimeter (lp\/mm). The image includes Group -2, Element 1 (0.25 lp\/mm) through Group 7, Element 6 (228 lp\/mm). The image is patterned in a positive fashion, meaning that an opqaue pattern is centered on a clear field. The pattern is formed in durable double layer evaporative Chromium (Optical Density \u0026gt; 3.0) on a stable 1mm Fused Silica (quartz) substrate.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eUSAF targets can be used in the determination of optical resolution, MTF, field distortion, and parfocal stability.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eFor complete specifications, please see the drawing below under \u003c\/span\u003e\u003cb\u003e“Detailed Specifications”\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0726\/7477\/1081\/files\/DA051.pdf?v=1764862723\"\u003eClick here to download drawing\u003c\/a\u003e \u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":45015755391113,"sku":null,"price":710.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/7477\/1081\/files\/DA051image.jpg?v=1764862777","url":"https:\/\/maxlevy.com\/products\/da051","provider":"Max Levy","version":"1.0","type":"link"}