Light Intensity Profile Control along the Optical Axis with Complex Pupils Implemented onto a Phase-Only SLM

2008 ◽  
Author(s):  
O. López-Coronado ◽  
C. Iemmi ◽  
J. Davis ◽  
J. Campos ◽  
M. J. Yzuel ◽  
...  
Keyword(s):  
Light Intensity ◽  
Optical Axis ◽  
Intensity Profile ◽  
Profile Control

scholarly journals Heterodyne standing-wave interferometer / Heterodynes Stehende-Welle-Interferometer

2018 ◽  
Vol 85 (s1) ◽  
pp. s80-s85
Author(s):  
Ingo Ortlepp ◽  
Eberhard Manske ◽  
Jens-Peter Zöllner ◽  
Ivo Rangelow
Keyword(s):  
Frequency Shift ◽  
Standing Wave ◽  
Optical Axis ◽  
Intensity Profile ◽  
Photo Sensor ◽  
Length Measurements ◽  
Laser Sources

Abstract This manuscript describes a novel standingwave arrangement with two laser sources of different wavelengths, emitting towards each other. The resulting standing wave has a continuously moving intensity profile, a thin, transparent photo sensor is inserted into. When the sensor is moved along the optical axis a frequency shift, proportional to the velocity, occurs. This frequency shift can be evaluated for the purpose of interferometric length measurements.

Research of Optical Characteristics of Diffuser with Taper Microstructure by Micro Injection Molding

2014 ◽  
Vol 609-610 ◽  
pp. 1313-1318
Author(s):  
Da Ming Wu ◽  
Jian Zhuang ◽  
Zhong Li Zhao ◽  
Hong Xu ◽  
Yao Huang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Intensity ◽  
Injection Molding ◽  
Intensity Distribution ◽  
Visual Angle ◽  
Optical Axis ◽  
Diameter Ratio ◽  
Vertex Angle ◽  
Light Intensity Distribution ◽  
Maximum Value

In this paper, diffuser with taper microstructure has been put forward, and the transmission of the light in the taper microstructure has been analyzed. The software of Lighttools has been used to analyze the influence on light intensity distribution of the vertex angle θ, the space between the microstructure L, the diameter ratio of up to down of the microstructure A/B, the cutting output of the microstructure H and the refractive index of the diffuser n1.As a result, the light intensity of the optical axis will increase and visual angle will decrease when the vertex angle θ, the refractive index of the diffuser n1 and the cutting output of the microstructure H increase; the light intensity of the optical axis will increase and visual angle will decrease when the space between the microstructure decrease; with the increasing of the ratio A/B, the light intensity of the optical axis would first increase and then decrease, visual angle would first decrease and then increase. When A/B=0.4, the light intensity gets the maximum value, the visual angle gets the minimum value. The result of the simulation is significant to manufacture and research.

scholarly journals Reflected light intensity profile of two-layer tissues: phantom experiments

2011 ◽  
Vol 16 (8) ◽  
pp. 085001 ◽  
Author(s):  
Rinat Ankri ◽  
Haim Taitelbaum ◽  
Dror Fixler
Keyword(s):  
Light Intensity ◽  
Intensity Profile ◽  
Reflected Light ◽  
Phantom Experiments

scholarly journals Design and Simulation of Compound Eye Lens for Visible Light Communication and Illumination

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Jiehui Li ◽  
Qian Zhang
Keyword(s):  
Light Intensity ◽  
Visible Light ◽  
Compound Eye ◽  
Optical Axis ◽  
Visible Light Communication ◽  
Eye Lens ◽  
Light Power ◽  
Convex Lens ◽  
Array Structure ◽  
Simulation Results

We proposed a scheme for designing an optical launch system that can make the light intensity more uniform on the receiving plane via a compound eye lens combined with a sunflower plano-convex lens. The simulation results demonstrate that the light converges on the optical axis after passing through the sunflower-shaped plano-convex lens array and compound eye lens. The divergence angle and central light intensity of the receiving plane are, respectively, 26.57° and 80.50% of the total emitted light power for the array structure of the compact compound eye plano-convex lens, while those are 21.80° and 62.50% for the discrete compound eye lens. From the above results, it can be seen that the compact compound eye lens is more conducive to the uniform distribution of light intensity on the receiving plane compared with the discrete compound eye lens, taking into account the dual application of illumination and communication.

Third harmonic generation in ZnO semiconductor using the simplified bond hyperpolarizability model

2018 ◽  
Vol 27 (03) ◽  
pp. 1850025 ◽  
Author(s):  
Hendradi Hardhienata ◽  
Ignu Priyadi ◽  
Bayti Nurjanati ◽  
Husin Alatas
Keyword(s):  
Light Intensity ◽  
Harmonic Generation ◽  
Rotation Angle ◽  
Third Harmonic Generation ◽  
Intensity Profile ◽  
Wurtzite Structure ◽  
Third Harmonic ◽  
Rank Tensor ◽  
Zno Semiconductor

We describe the fourth rank tensor and the related third harmonic generation (THG) light intensity profile in a (0002) wurtzite structure using the simplified bond hyperpolarizability model (SBHM). We show that the resulting THG intensity is isotropic e.g., does not depend on the azimuthal rotation angle of the material. Assuming that THG inside wurtzite structures are dominated solely by bulk dipoles, only one fitting parameter in terms of the effective THG hyperpolarizability is required to generate the Rotational Anisotropy THG (RATHG) experiment result.

LIGHT INTENSITY PROFILE IN HETEROGENEOUS PHOTOCHEMICAL REACTOR

1992 ◽  
Vol 117 (1) ◽  
pp. 111-116 ◽  
Author(s):  
TOSHIRO MARUYAMA ◽  
TADASHI NISHIMOTO
Keyword(s):  
Light Intensity ◽  
Intensity Profile

The radial light intensity profile in cylindrical photoreactors

AIChE Journal ◽  
1978 ◽  
Vol 24 (2) ◽  
pp. 335-338 ◽  
Author(s):  
John A. Williams
Keyword(s):  
Light Intensity ◽  
Intensity Profile

DGV’s Accuracy Dependence Upon Laser Beam Intensity Profile

2009 ◽  
Author(s):  
Gerald L. Morrison ◽  
Saikishan Suryanarayanan
Keyword(s):  
Light Intensity ◽  
Laser Beam ◽  
High Speed ◽  
Pulsed Laser ◽  
Laser Frequency ◽  
Intensity Profile ◽  
Laser Beam Intensity ◽  
Doppler Shifts ◽  
Ccd Array ◽  
Spatially Varying

A Doppler Global Velocimeter (DGV) system was designed for use in high speed rotating equipment at the Turbomachinery Laboratory. Due to the rapidly varying periodic nature of flows inside turbines, compressors, and pumps, it is desirable to use a pulsed laser as the light source. An ND-YAG laser was selected for use based upon the 9 ns pulse duration and the ability for the laser to operate with a 15 MHz light bandwidth which is tunable to the absorption line filter used in the DGV system. However, when applied to the system it was discovered the DGV system did not work properly. The output of a line CCD array used to monitor the laser frequency was closely scrutinized. The light intensity across the laser beam was not Gaussian in nature but contained a very large amount of “noise”. Since the DGV system measures light intensity variations to infer Doppler shifts and hence velocity distributions, the rapidly spatially varying light intensity across the laser beam was suspected as the cause of the system’s inaccuracy. An analysis to quantify how the laser beam light intensity profile noise affects a DGV system accuracy is performed and possible remedies are suggested.

Analysis of 3-d molecular distribution with the digital imaging microscope

1988 ◽  
Vol 46 ◽  
pp. 40-41
Author(s):  
W.A. Carrington ◽  
F.S. Fay ◽  
K.E. Fogarty ◽  
L. Lifshitz
Keyword(s):  
Image Restoration ◽  
Digital Imaging ◽  
Fluorescent Dyes ◽  
Optical Axis ◽  
Computer Hardware ◽  
Computer Algorithms ◽  
Low Contrast ◽  
Specific Proteins ◽  
Effective Use ◽  
Single Living Cells

Advances in digital imaging microscopy and in the synthesis of fluorescent dyes allow the determination of 3D distribution of specific proteins, ions, GNA or DNA in single living cells. Effective use of this technology requires a combination of optical and computer hardware and software for image restoration, feature extraction and computer graphics.The digital imaging microscope consists of a conventional epifluorescence microscope with computer controlled focus, excitation and emission wavelength and duration of excitation. Images are recorded with a cooled (-80°C) CCD. 3D images are obtained as a series of optical sections at .25 - .5 μm intervals.A conventional microscope has substantial blurring along its optical axis. Out of focus contributions to a single optical section cause low contrast and flare; details are poorly resolved along the optical axis. We have developed new computer algorithms for reversing these distortions. These image restoration techniques and scanning confocal microscopes yield significantly better images; the results from the two are comparable.

Sign in / Sign up

Export Citation Format

Share Document