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| Keywords: Fresnel lens-1.svg en How to divide a Normal lens above into a Fresnel lens below of constant thickness ja é šå¸¸ã®ãƒ¬ãƒ³ã‚ºï¼ˆä¸Šï¼‰ã‚’厚ã¿ãŒä¸ 定ã®ãƒ•ãƒ¬ãƒãƒ«ãƒ¬ãƒ³ã‚ºï¼ˆä¸‹ï¼‰ã¨ãªã‚‹ã‚ˆã†ã«åˆ†å‰²ã™ã‚‹å ´åˆã®æ–é ¢å›³ã ‚ã“ã®å ´åˆã 外周ã»ã©åˆ†å‰²å¹…ãŒç‹ããªã‚‹ã ‚ Deutsch eigene Zeichnung English own drawing Japanese è‡ªä½ Polski rysunek wÅ‚asny ja User ããŸã— 2008-11-26 Fresnel lens diagrams | ||||
