A hybrid doubled achromat based on a photon sieve

作者：He Yu^*; Zhao Lixin; Tang Yan; Hu Song

来源：Optik, 2014, 125(3): 958-961.

DOI：10.1016/j.ijleo.2013.07.111

• Diffractive optical element
• Photon sieve
• Achromat
• Hybrid refractive-diffractive

Photon sieves are diffractive optical elements with large chromatic aberration. To correct the dispersion of a photon sieve, a novel hybrid doubled achromat combined a photon sieve and a refractive lens is proposed. The design of this achromat applies the opposite dispersive characteristics of diffractive and refractive elements. Two design examples for different bandwidths of 300 nm and 80 nm in visible spectrum are given. For analyzing their focusing properties, the intensity distributions both along the axis and at the focal plane are studied. The results illustrate that the achromatic design is achieved and the secondary spectrum can be corrected for a narrow bandwidth. And compared to traditional hybrid achromat, it can focus to a sharper spot.

• 出版日期2014
• 单位中国科学院光电技术研究所; 中国科学院大学