{"product_id":"waistwyn-the-gaussian-archer-mug","title":"Waistwyn, the Gaussian Archer Mug","description":"\u003cp\u003eA Gaussian beam stays near-focused only within the Rayleigh range z\u003csub\u003eR\u003c\/sub\u003e = πw₀²\/λ; at z = z\u003csub\u003eR\u003c\/sub\u003e its radius has grown by √2.\u003c\/p\u003e\n\u003cp\u003eThe joke: Every optics student knows focus is not forever: tighter waists diverge faster. The slogan on the mug reads \u003cstrong\u003eFOCUSED FOR ONE RAYLEIGH RANGE.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: H. Kogelnik \u0026amp; T. Li, Appl. Opt. 5, 1550 (1966).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976083509351,"sku":"10548423181095494174","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/552278901488293890_2048.jpg?v=1793683524","url":"https:\/\/pixelatedphysics.com\/pl\/products\/waistwyn-the-gaussian-archer-mug","provider":"Pixelated Physics","version":"1.0","type":"link"}