摘要：We present an optical design for a fingerprint scanner that addresses the challenges involved in capturing the prints of roiling fingers. A roiling fingerprint scanner requires a high performance distortion free system with big object space numerical aperture （0.022） and larger capture size （40 × 40 （mm））. We show how these requirements can be achieved with the approach of optical and computational hybrid distortion correction. In addition, dark background ilhmfination is utilized to increase fingerprint contrast.

摘要：日间辐射冷却技术借助材料对太阳光高反射和对中红外大气窗口高发射的光谱特点,提供了一种零耗能的可持续制冷方案.然而,目前辐射冷却器因为实现对太阳光的高反射通常呈现出白色/银色,限制了其实际应用.开发彩色辐射冷却器则至关重要,但由于显示颜色往往导致对太阳光可见光波段的吸收,增加了体系的热负荷,所以实现彩色辐射制冷亚环境冷却一直是个挑战.本文提出了基于高量子发光效率的光致发光彩色辐射冷却器(PCRC),它可以实现全色谱亚环境日间辐射冷却.此外,作者还报道了一种可大规模生产的静电纺丝/喷墨打印方法制备***上层的光致发光着色剂实现显色的同时,将因为显色吸收的太阳光在可见光波段转化为发射光,极大地减少了太阳光对体系的加热效应;底层的醋酸纤维素纳米纤维膜能反射其余波段的太阳光并向宇宙辐射热量.这种基于光致发光的彩色辐射制冷器在太阳光直射(辐射峰值>740 W m^(-2))下,其温度比环境温度低2.2~5.4℃,实现了亚环境日间辐射冷却.该设计策略和可放大的图案化制备技术为辐射冷却的多场景应用开辟了一条新道路,并为可持续能源发展提供了一种创新途径.

摘要：A type of spatial modulating micro Fourier transform spectrometer(FTS) based on micro multi-step mirrors(MMSMs) is designed and manufactured in this *** interference system is based on Michelson interferometer,using two MMSMs instead of plane mirrors in two *** recovered spectrum is simulated with different distances between MMSMs and the detector,and the influence of diffraction on the recovered spectrum is *** edge-enlarging method for the MMSMs is proposed to eliminate edge noise,and the influence of surface roughness of MMSMs on the recovered spectrum is also ***,the way of manufacturing the MMSMs is investigated.

摘要：In order to detect the aberration from a wide field of view（FOV） on the retina with adaptive optics, we present a multiple-object Shack-Hartmann wavefront sensor（MOSHWFS） design. The simulated results indicate that the wavefront from our MOSHWFS can be reconstructed for multiple objects, and the measurement error can be less than λ∕7 with an MOSHWFS with an FOV of 6.7°, for maximum eye aberration. The experimental result with two objects indicates that the measurement error can be less than λ∕14, with the root mean square of the reference wavefront as 0.798λ and 0.895λ, respectively.

摘要：This Letter presents an optical design method based on the Seidel aberration theory for dynamic refocus systems. The function of a dynamic refocus system is to increase the amount of return photons when a pulsed laser travels over an extended height range. In this study, the dynamic refocus system is a short focal image system. The aberrations of the dynamic refocus system are calculated individually. Aplanatic lenses are used to eliminate the main spherical aberration. A field lens is used to change the stop position in order to eliminate comas and astigmatism. The effectiveness of the initial design results are confirmed, and the designed dynamic refocus objective with an aperture of F-number 0.98 and a focal length of 14.325 mm is achieved. The total motion of the dynamic refocus mirror is approximately 216 pm at heights that ranged from 8 to 18 kin. The optimum result shows that the dynamic refocus system is an ideal optical image system at each conjugating height with 10 km sample thicknesses.

摘要：传统的制冷、制热技术能源消耗量巨大,而利用太空和太阳作为天然冷源和热源的辐射制冷和太阳能制热技术由于零能耗、低碳排的特点受到了研究者们的广泛关注,然而,目前被动式制冷/制热器件通常只能实现单一功能、无法满足动态环境条件下多变的制冷/制热需求,本文提出了一种温度自适应的智能控温双层薄膜(STG),以辐射制冷技术和太阳能制热技术为基础,可以随温度响应实现不同环境条件下制冷/制热模式的智能切换,当温度低于其境界温度时,STG膜在太阳光波段从高反射切换为高吸收(反射率由0.962变为0.059),而中红外发射率始终保持在0.95.该光谱特性使得STG膜在夏季直射阳光(辐射峰值>900Wm)下能够实现比环境温度低5°C的亚环境日间辐射冷却,而在冬季则能实现550Wm²的太阳光加热功率。作者同时通过理论模拟验证当STG膜被大规模应用时,这种可智能切换的制冷/制热装置在节能方面展现出了巨大的应用潜力该设计策略能够为零能耗的热响应控温器件提供新的思路,并为实现能源的可持续发展提供新的途径。

摘要：为降低零级串扰和相移误差对光栅横向剪切干涉仪波前复原精度的影响,进一步提升光栅横向剪切干涉仪检测光刻镜头系统波像差精度,推导出一种设计光栅剪切干涉相移算法的一般表达式,给出相移算法的具体设计方法。根据该表达式和设计方法,可以针对不同的零级串扰和相移误差建立相应的4种相移算法,实现高精度系统波像差检测。同时设计和评价了一种新的13步相移算法,结果证明所推导的一般表达式的有效性和先进性。