Diffraction Effect of Liquid Crystal Spatial Light Modulator Using for Beam Deflection

Dongmei, 蔡冬梅 Cai; Huizhen, 杨慧珍 Yang; Ning, 凌宁 Ling; Wenhan, 姜文汉 Jiang

doi:10.3788/cjl20083504.0491

Cited by 5 publications

(3 citation statements)

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“…构光 [30] ，通过压电陶瓷驱动的反射镜改变光路来改变结构光的相位角，这种装置速度慢，精度低，稳定性差。之后，光栅 [12,[21][22]28,31] 、空间光调制器(SLM) [18,[32][33][34] 、数字微镜芯片(DMD) [29,[35][36][37] [34] 在 2009 年使用空间光调制器来产生结构光，如图 3 所示。光纤出来的光准直之后经过偏振分束器(PBS)、半波片(HWP)射入空间光调制器发生衍 [38][39] ，它由像素点组成，每个像素点可以编程控制开关状态，对入射光进行调制。结构光照明荧光显微镜需要不同方向、同一方向不同相位的结构照明条纹，这些要求可以通过控制空间光调制器一个周期内横向和纵向上包含的像素点来实现 [18,[33][34] 。结构照明条纹的偏振方向与其条纹方向保持 S 偏振的时候可以使结构照明条纹有最大的对比度，为此利用偏振旋转装置中的液晶相位延迟器和四分之一波片来控制不同照明条纹的偏振态。图 3 空间光调制器型结构光照明荧光显微镜 [33][34] 。空间光调制器只能对偏振光进行调制的特点，使得光路略显复杂；激发光偏离空间光调制器工作波长越大，衍射效率越低，因此空间光调制器对应特定的单个激发波长。 3.3 数字微镜芯片型结构光照明荧光显微镜这类结构光照明荧光显微镜利用 DMD 产生用于照明的结构条纹。Dan 等 [35] 于 2013 年使用了这类结构…”

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Structured Illumination Fluorescence Microscopy: Diffraction-Limit Breaking Principle and Application in Life Science

Meirui¹,

Xibin²,

Daxi³

et al. 2015

激光与光电子学进展

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Resolution of traditional fluorescence microscopy is limited by the diffraction of light. Diffraction limit can be broken by structured illumination to get higher resolution. Compared to other super-resolution microscopy techniques, structured illumination fluorescence microscopy can achieve higher imaging speed and need a simple setup, which has an important application life science research. In this paper, we first illustrate the principle and reconstruction algorithm to obtain 2D and 3D super-resolution images as well as non-linear structured illumination. Then the generally used structured illumination method and setup based on grating, spatial light modulator (SLM) as well as digital micro-mirror device (DMD) are introduced and compared. At last we summarize the application of structured illumination fluorescence microscopy for observing biological structures and processes.

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Section: -unclassified

Structured Illumination Fluorescence Microscopy: Diffraction-Limit Breaking Principle and Application in Life Science

Meirui¹,

Xibin²,

Daxi³

et al. 2015

激光与光电子学进展

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“…The all-solid-state laser, which is featured by its small volume, high electro-optic conversion efficiency, simple structure, low cost and being made from all-solid-state devices of small volume, grows fast owing to the popularization of the laser diode array (LDA) with a wide application prospect in the space communication, coherent radar, medicine, micro processing, digital optical storage and high-power laser facilities [1][2][3][4][5][6][7][8] . Meanwhile, as the narrowband pulse has many problems in remission of B integral constraint and inhibition of the Stimulated Brillouin Scattering (SBS) effect on the transverse of the large aperture optical component.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Laser Amplifier Based on LDA Side-Pumping Nd:Glass

Qiu

Zhou

Tang

et al. 2013

KEM

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A high beam quality and high stability laser amplifier baseing on LDA side-pumping Nd-Glass which applied to amplify a nanosecond laser pulse source has been developed in the paper. In addition, Liquid crystal spatial light modulator is used in the amplifier for spatial beam shaping so as to improve the near-field uniformity. When the flat top pules with the pulse width of 3ns and energy of 500nJ are injected as the seed pulse, the average output energy of the laser amplifier is 100mJ. The modulation degree near field is less than 1.22:1, and the beam angle drifting of the far-field laser is less than 10 μrad.

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“…The classical AO technologies have been implemented in astronomy successfully [1] and retina imaging [2,3] . A significant drawback of classical AO technologies is that the information of phase modulation can not be measured directly and must be reconstructed from intensity information gathered from wave-front sensors.…”

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confidence: 99%

Theoretical analysis of adaptive optics system based on stochastic parallel gradient descent algorithm

Yang

2010

Optoelectron. Lett.

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The adaptive optics (AO) technology without a wave-front sensor is simple and has more application fields than conventional AO technologies. The theory basis of the AO system based on stochastic parallel gradient descent (SPGD) from the convergence, the stability, and the averaged convergence rate is analyzed, where SPGD is used to control the AO system. The results show that the AO system based on SPGD can obtain good convergence and stability, and the fast convergence rate, which is in inverse proportion to n (n is the number of control parameters). C Adaptive optics (AO) technologies are often used to compensate different wave-front distortions. The classical AO technologies have been implemented in astronomy successfully [1] and retina imaging [2,3] . A significant drawback of classical AO technologies is that the information of phase modulation can not be measured directly and must be reconstructed from intensity information gathered from wave-front sensors. There exists an alternative method, which does not require determining phase from intensity. The system usually considers a "sharpness" criterion as a function of the control parameters and then uses certain optimization algorithm to find the optimum. Among mode-free optimization techniques, the stochastic parallel gradient descent (SPGD) [4] is perhaps the most promising control algorithm for AO applications [5] .Researchers have studied applications of AO technology based on SPGD in different fields and have obtained some valuable results, such as retina imaging [6] , direct energy and laser communication applications [7] , astronomy imaging [8] and extended object imaging [9] . M.A. Vorontsov [4] preliminarily deduced the convergence and the stability of AO system based on SPGD. In this paper, we will generalize the convergence and the stability and analyze the convergence rate of AO system based on SPGD.It is assumed that the system performance metric is J = J(u), the control parameter is u = {u 1 , u 2 , u n }, and the *

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Diffraction Effect of Liquid Crystal Spatial Light Modulator Using for Beam Deflection

Cited by 5 publications

References 0 publications

Structured Illumination Fluorescence Microscopy: Diffraction-Limit Breaking Principle and Application in Life Science

Structured Illumination Fluorescence Microscopy: Diffraction-Limit Breaking Principle and Application in Life Science

Experimental Study of Laser Amplifier Based on LDA Side-Pumping Nd:Glass

Theoretical analysis of adaptive optics system based on stochastic parallel gradient descent algorithm

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