{"id":9253,"date":"2020-10-20T17:47:43","date_gmt":"2020-10-20T17:47:43","guid":{"rendered":"https:\/\/nanovea.com\/?p=9253"},"modified":"2025-10-22T23:51:41","modified_gmt":"2025-10-22T23:51:41","slug":"fresnel-lens-topografia","status":"publish","type":"post","link":"https:\/\/nanovea.com\/pt\/fresnel-lens-topografia\/","title":{"rendered":"Topografia da Lente Fresnel"},"content":{"rendered":"
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TOPOGRAFIA DA LENTE DE FRESNEL<\/span>USANDO\u00a0<\/span>3D\u00a0<\/span>PERFIL\u00d4METRO \u00d3PTICO SEM CONTATO<\/span><\/h1>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Preparado por<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Duanjie Li & Benjamin Mell<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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INTRODU\u00c7\u00c3O<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Uma lente \u00e9 um dispositivo \u00f3ptico de simetria axial que transmite e refrai a luz. Uma lente simples consiste em um \u00fanico componente \u00f3ptico para convergir ou divergir a luz. Mesmo que as superf\u00edcies esf\u00e9ricas n\u00e3o tenham a forma ideal para fazer uma lente, elas s\u00e3o freq\u00fcentemente usadas como a forma mais simples para a qual o vidro pode ser retificado e polido.<\/span><\/p>\n

Uma lente Fresnel consiste de uma s\u00e9rie de an\u00e9is conc\u00eantricos, que s\u00e3o partes finas de uma lente simples com uma largura t\u00e3o pequena quanto alguns mil\u00e9simos de polegada. As lentes Fresnel cont\u00eam uma abertura grande e uma dist\u00e2ncia focal curta, com um desenho compacto que reduz o peso e o volume do material necess\u00e1rio, em compara\u00e7\u00e3o com as lentes convencionais com as mesmas propriedades \u00f3pticas. Uma quantidade muito pequena de luz \u00e9 perdida por absor\u00e7\u00e3o devido \u00e0 fina geometria da lente Fresnel.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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IMPORT\u00c2NCIA DA PROFILOMETRIA 3D SEM CONTATO PARA A INSPE\u00c7\u00c3O DE LENTES FRESNEL<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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As lentes Fresnel s\u00e3o amplamente empregadas na ind\u00fastria automotiva, far\u00f3is, energia solar e sistemas \u00f3pticos de pouso para porta-avi\u00f5es. Moldar ou estampar as lentes em pl\u00e1stico transparente pode tornar sua produ\u00e7\u00e3o econ\u00f4mica. A qualidade do servi\u00e7o das lentes Fresnel depende principalmente da precis\u00e3o e da qualidade da superf\u00edcie do seu anel conc\u00eantrico. Ao contr\u00e1rio de uma t\u00e9cnica de sonda de toque, NANOVEA Perfis \u00f3pticos<\/a> realize medi\u00e7\u00f5es de superf\u00edcie 3D sem tocar na superf\u00edcie, evitando o risco de fazer novos arranh\u00f5es. A t\u00e9cnica Luz Crom\u00e1tica \u00e9 ideal para digitaliza\u00e7\u00e3o precisa de formas complexas, como lentes de diferentes geometrias.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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ESQUEMA DE LENTES FRESNEL<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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As lentes Fresnel de pl\u00e1stico transparente podem ser fabricadas por moldagem ou estampagem. Um controle de qualidade preciso e eficiente \u00e9 fundamental para revelar moldes ou carimbos defeituosos na produ\u00e7\u00e3o. Ao medir a altura e o passo dos an\u00e9is conc\u00eantricos, as varia\u00e7\u00f5es de produ\u00e7\u00e3o podem ser detectadas comparando-se os valores medidos com os valores de especifica\u00e7\u00e3o dados pelo fabricante da lente.<\/p>

A medi\u00e7\u00e3o precisa do perfil da lente garante que os moldes ou carimbos sejam usinados corretamente para atender \u00e0s especifica\u00e7\u00f5es do fabricante. Al\u00e9m disso, o carimbo pode desgastar-se progressivamente com o tempo, fazendo com que ele perca sua forma inicial. O desvio consistente da especifica\u00e7\u00e3o do fabricante da lente \u00e9 uma indica\u00e7\u00e3o positiva de que o molde precisa ser substitu\u00eddo.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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OBJETIVO DA MEDI\u00c7\u00c3O<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Nesta aplica\u00e7\u00e3o, apresentamos o NANOVEA ST400, um perfilador 3D sem contato com um sensor de alta velocidade, que fornece uma an\u00e1lise abrangente do perfil 3D de um componente \u00f3ptico de forma complexa. Para demonstrar as not\u00e1veis capacidades da nossa tecnologia Chromatic Light, a an\u00e1lise do contorno \u00e9 realizada em uma lente Fresnel.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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NANOVEA ST400 \u00c1rea Grande<\/span>
Profil\u00f4metro \u00f3ptico 3D<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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A lente acr\u00edlica Fresnel de 2,3\" x 2,3\" utilizada para este estudo consiste em\u00a0<\/i><\/p>

uma s\u00e9rie de an\u00e9is conc\u00eantricos e um complexo perfil de se\u00e7\u00e3o transversal serrilhada.\u00a0<\/i><\/p>

Tem uma dist\u00e2ncia focal de 1,5\", di\u00e2metro efetivo de 2,0\",\u00a0<\/i><\/p>

125 ranhuras por polegada, e um \u00edndice de refra\u00e7\u00e3o de 1,49.<\/i><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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A varredura NANOVEA ST400 da lente Fresnel mostra um aumento percept\u00edvel da altura dos an\u00e9is conc\u00eantricos, deslocando-se para fora do centro.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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COR FALSA 2D<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Representa\u00e7\u00e3o em altura<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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VIS\u00c3O 3D<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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PERFIL EXTRA\u00cdDO<\/i><\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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PEAK & VALLEY <\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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An\u00e1lise Dimensional do Perfil<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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CONCLUS\u00c3O<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Nesta aplica\u00e7\u00e3o, mostramos que o NANOVEA ST400 Profiler \u00d3ptico sem contato mede com precis\u00e3o a topografia de superf\u00edcie das lentes Fresnel.\u00a0<\/p>

A dimens\u00e3o da altura e do passo pode ser determinada com precis\u00e3o a partir do complexo perfil serrilhado usando o software de an\u00e1lise NANOVEA. Os usu\u00e1rios podem inspecionar efetivamente a qualidade dos moldes ou carimbos de produ\u00e7\u00e3o comparando a altura do anel e as dimens\u00f5es do passo das lentes fabricadas com a especifica\u00e7\u00e3o ideal do anel.<\/p>

Os dados mostrados aqui representam apenas uma parte dos c\u00e1lculos dispon\u00edveis no software de an\u00e1lise.\u00a0<\/p>

Os Perfiladores \u00d3pticos NANOVEA medem praticamente qualquer superf\u00edcie em campos incluindo Semicondutores, Microeletr\u00f4nica, Solar, Fibra \u00d3ptica, Automotiva, Aeroespacial, Metal\u00fargica, Usinagem, Revestimentos, Farmac\u00eautica, Biom\u00e9dica, Ambiental e muitos outros.<\/p>

\u00a0<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Tem um aplicativo semelhante?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tCONVERSE COM UM ESPECIALISTA AGORA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tOBTENHA PRE\u00c7OS E DETALHES RAPIDAMENTE<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

FRESNEL LENS TOPOGRAPHYUSING\u00a03D\u00a0NON-CONTACT OPTICAL PROFILOMETER Prepared by Duanjie Li & Benjamin Mell INTRODUCTION A lens is an optical device of axial symmetry that transmits and refracts light. A simple lens consists of a single optical component for converging or diverging the light. Even though spherical surfaces are not ideal shape for making a lens, they […]<\/p>","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[7,349,354,352,353,335],"tags":[],"class_list":["post-9253","post","type-post","status-publish","format-standard","hentry","category-application-notes","category-laboratory-testing","category-profilometry-flatness-warpage","category-profilometry-step-height-thickness","category-profilometry-texture-grain","category-profilometry-testing"],"_links":{"self":[{"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/posts\/9253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/comments?post=9253"}],"version-history":[{"count":83,"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/posts\/9253\/revisions"}],"predecessor-version":[{"id":25146,"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/posts\/9253\/revisions\/25146"}],"wp:attachment":[{"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/media?parent=9253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/categories?post=9253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nanovea.com\/pt\/wp-json\/wp\/v2\/tags?post=9253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}