Gradient refractive index lenses and methods of fabricating the same

    公开(公告)号:US11719861B1

    公开(公告)日:2023-08-08

    申请号:US17842273

    申请日:2022-06-16

    IPC分类号: G02B3/00 G02B1/04

    CPC分类号: G02B3/0087 G02B1/041

    摘要: Gradient refractive index lenses (GRI-Ls) and methods of fabricating the same are provided. GRI-Ls can be fabricated by stereolithography (SLA) and/or photo-assisted, thermal-assisted, and/or other laser-based curing from at least two precursors with a preset refractive index gradation along the planar axis. These lenses are self-focusing lenses and may be convergent or divergent for decreasing and increasing refractive indices from the center, respectively. Rather than a gradation in lens thickness from the center, the GRI-Ls can have a gradation of composition from the center.

    Fabrication of suspended carbon micro and nanoscale structures
    18.
    发明授权
    Fabrication of suspended carbon micro and nanoscale structures 有权
    悬浮碳微纳米结构的制备

    公开(公告)号:US07682659B1

    公开(公告)日:2010-03-23

    申请号:US11279229

    申请日:2006-04-10

    IPC分类号: C23C16/00

    摘要: Methods for the fabrication of suspended carbon structures using a negative photoresist that is exposed to a source of UV light, and a two step pyrolysis process. Ebeam lithography is used to define the suspended structures. The fabrication method described herein provides a novel carbon microfabrication technique, which has potential applications in carbon based electronics, sensors, batteries, microfluidics, etc.

    摘要翻译: 使用暴露于UV光源的负性光致抗蚀剂制造悬浮碳结构的方法和两步热解法。 Ebeam光刻用于定义悬挂结构。 本文所述的制造方法提供了一种新颖的碳微制造技术,其在碳基电子学,传感器,电池,微流体等方面具有潜在的应用。

    STAMPING APPARATUS HAVING A PART-TIME DRAW BEAD

    公开(公告)号:US20220395884A1

    公开(公告)日:2022-12-15

    申请号:US17347801

    申请日:2021-06-15

    IPC分类号: B21D22/22 B21D22/06 B21D37/10

    摘要: A stamping apparatus that includes an upper die, a blank-holding binder, and fixed lower die. The fixed lower die features a drawing punch and the upper die features a corresponding cavity. The fixed lower die includes a stake bead and a corresponding depression is present on the upper die. The blank-holding binder includes a draw bead and a corresponding depression is present on the upper die. In the stamping process, the draw bead engages a blank in a first stage, causing the blank to begin to stretch into the shape of the drawing punch with a greater tightened partially finished panel shape. In a second stage, the draw bead disengages the blank as the blank is drawn towards the drawing punch. In a final stage, the stake bead engages the blank to tighten the blank around the drawing punch into a final shape.