Manufacturing and analyzing of cost-efficient fresnel lenses using stereolithography
Manufacturing and analyzing of cost-efficient fresnel lenses using stereolithography
复制标题
使用立体光刻技术制造和分析经济高效的菲涅耳透镜
DOI：
10.1117/12.2555367
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发表时间：
2020
影响因子：
3.6
通讯作者：
Oliver Stübbe
中科院分区：
文献类型：
--
作者：
A. Shrotri;M. Beyer;Oliver Stübbe
在过去的几十年里，增材制造 (AM) 为制造 3D 物体提供了一个新的方面。使用增材制造技术生产 3D 物体加快了设计和制造的速度。这些增材制造技术可用于制造光学、机械和电气原型。光学原型的制造涉及球面透镜原型和特殊形式的非球面透镜和聚光透镜（例如菲涅尔透镜原型）的生产。不同设计的菲涅尔透镜原型是使用透明树脂材料和立体光刻设备（SLA）工艺制造的。它使用光化学过程来开发 3D 结构。这些制造的菲涅尔透镜原型很难使用手工抛光进行后处理，因此它们使用涂漆进行后处理以获得更高的透明度。这些原型使用激光源进行测试，以评估制造的菲涅尔透镜原型的光衰减和焦距。使用相同焦距的市售凸透镜进行了类似的测试。这些测试结果表明，光束通过菲涅耳透镜原型和凸透镜时的平均衰减差异为1 dB。制造的菲涅尔透镜原型的焦距有 10 毫米的偏差。因此，使用 SLA 和涂漆来制造复杂性和成本降低的菲涅尔透镜原型是可行的。
Additive manufacturing (AM) has provided a new aspect of manufacturing 3D objects in the past few decades. The use of AM for the production of 3D objects has accelerated the rate of designing and manufacturing. These AM techniques can be utilized in manufacturing optical, mechanical and electrical prototypes. The manufacturing of optical prototypes involves the production of spherical lens prototypes and special forms of aspheric and concentrator lenses such as fresnel lens prototypes. Different designed fresnel lens prototypes are manufactured using a transparent clear resin material and stereolithography apparatus (SLA) process. It uses a photochemical process to develop 3D structures. These manufactured fresnel lens prototypes are difficult to postprocess using hand polishing, hence they are post-processed using lacquering to get more transparency. These prototypes are tested using a laser source to evaluate the attenuation of light and focal length of manufactured fresnel lens prototypes. Similar tests using a commercially available convex lens of the same focal length are carried out. The results of these tests show that the difference between the mean of attenuation of light beam when passed through a fresnel lens prototype and the convex lens is 1 dB. The focal length of manufactured fresnel lens prototypes has a 10 mm deviation. Therefore, it is feasible to manufacture complexity and cost reduced fresnel lens prototypes using SLA and lacquering.