環境友好的場曲矯正微透鏡陣列

場曲是光學系統的一種固有像差,就是即便是對著標靶等平面物體拍攝,也只能在對焦點位置實現高銳度,邊緣區域的圖像就會變得模糊。然而現有的光學系統和成像部件多為平面設計,因此,消除場曲像差就變得尤為重要。

蛋白質材料作為一種天然的生物大分子材料,具有來源廣泛可再生、生物兼容無污染、可吸收降解等優點。近年來,在日益發展成熟的微納加工技術的幫助下,利用蛋白質及其衍生物,已經成功實現了許多特殊功能的微納結構、微器件乃至集成系統,成為一個重要的前沿研究方向和發展趨勢。

基于以上背景,來自吉林大學集成光電子重點實驗室的楊罕教授課題組提出了利用飛秒激光雙光子聚合直寫制備基于牛血清白蛋白的三維場曲矯正微透鏡組,它通過排列焦距不同的多組微透鏡陣列,實現了對彎曲像平面的平面矯正。另外,得益于飛秒激光超快脈沖非接觸、低附帶熱損傷的獨特優勢,使得蛋白質的生物活性得以部分保留。因此,可以通過利用蛋白質水凝膠自身在溶液中的平衡溶脹,實現透鏡組矯正焦平面的再度微調。該成果發表在Chinese Optics Letters 2019年第17卷第6期上(Zhishan Hou, et al., )。

广东11选5开奖助手研究小組認為,該研究成果顯示出蛋白質基材料在新型生物光子和生物醫學等領域的應用前景,表明了飛秒激光直寫技術在構建“智能”集成光子微/納米-生物系統的巨大潛力。

广东11选5开奖助手該課題組接下來的工作將會繼續聚焦飛秒激光直寫在器件幾何構型和材料功能特性的雙重可控設計,充分挖掘、利用蛋白質本征性質,賦予器件新穎多樣的特性和功能。

圖 (a)微透鏡陣列工作原理,(b)器件掃描電鏡(SEM)表征,(c)器件顯微鏡照片,(d)器件暗場成像照片。

Environmental-friendly microlens array for field curvature correction

广东11选5开奖助手Field curvature is a widespread matter in large field optical imaging systems, which means even if you are imaging a planar object, you can only achieve high sharpness at the focus position, and the image in the edge area may become blur. However, the existing optical systems and imaging components are mostly planar designs, so it is particularly important to eliminate field curvature aberrations.

As a natural biomacromolecular material, the protein materials have the advantages of wide source, renewable, biocompatible, non-polluting, and absorbable degradation. In recent years, with the help of growing maturity of micro-nano processing technology, many special functions of protein-based micro-nano structures, including micro-devices and even integrated systems have been successfully realized.

Based on hereinbefore background, the researchers from the group of Prof. Hong-Bo Sun (the Key Laboratory of Integrated Optoelectronics of Jilin University) demonstrated a three-dimensional microlens array with different curvature unit lenses (MLADC) based on bovine serum albumin (BSA) fabricated by femtosecond laser two-photon polymerization direct writing (FsDLW). The MLADC possesses unique and characteristic optical performance, as the curvatures of unit lenses are different along with their different positions, which will play a significant role in optimizing optical system structure and reducing optical elements, especially in field curvature correction. In addition, due to the unique advantages of FsDLW, such as non-contact and low thermal damage, the biological activity of the protein is partially retained. Therefore, it is easy to achieve a fine adjustment of the focal plane by utilizing the equilibrium swelling of the protein hydrogel in the solution. These results are reported in Chinese Optics Letters Vol. 17, No. 6 2019 (Zhishan Hou, et al., ).

“These results show the application prospects of protein-based materials in new biophotonics and biomedical fields, indicating the great potential of femtosecond laser direct writing technology in building "smart" integrated photonic micro/nano-biological systems,” said Dr. Zhi-Shan Hou from this group.

广东11选5开奖助手Their further work will focus on the dual controllable design of femtosecond laser direct writing in device geometry and material functional properties, and give the device novel and diverse features and functions by fully exploiting and utilizing the intrinsic properties of proteins.

Fig (a) Working principle of the microlens array, (b) scanning electron microscope (SEM) characterization, (c) microscope photographs, (d) dark field focus image.