A Kerr-Cell Camera with Synchronized Light Source for Millimicrosecond Reflected Light Photography

1961 ◽  
Vol 70 (7) ◽  
pp. 522-527
Author(s):  
George A. Theophanis
Keyword(s):  
Light Source ◽  
Reflected Light ◽  
Kerr Cell

Simplified field measurement methods for the CIE mesopic photometry system

2016 ◽  
Vol 49 (6) ◽  
pp. 774-787 ◽  
Author(s):  
T Uchida ◽  
Y Ohno
Keyword(s):  
Light Source ◽  
Spectral Reflectance ◽  
Spectral Power ◽  
Road Surface ◽  
Worst Case ◽  
Distribution Method ◽  
The Road ◽  
Reflected Light ◽  
Test Points ◽  
Adaptation Field

For implementation of the mesopic photometry system in CIE 191:2010 to outdoor lighting, two simplified methods to measure the mesopic luminance are proposed. One of the methods, named the Adaptation Spectral Power Distribution) method, assumes that the spectral power distributions (SPDs) of reflected light at test points on the road surface are the same as that of the adaptation field. Another method, named the Source SPD method, assumes that the reflected light SPDs are equal to the SPD of the light source. Error simulations with a real road surface spectral reflectance dataset show that the error distributes over an 8% range due to the variation of the road surface spectral reflectance in the worst case. Although the bias due to the road surface spectral reflectances causes a large error with the Source SPD method, a proposed correction can reduce the error sufficiently. Error simulations also show that the Source SPD method is not so sensitive for lighting scenes that include multiple light source types. It has been shown that the SPD methods can measure the mesopic quantities without scotopic/photopic luminance meters having both V( λ) and V′( λ) detectors when both the adaptation field and test points consist of road surfaces.

Method for Testing and Analyzing the Printing Performance of Fluorescent Inks

2014 ◽  
Vol 556-562 ◽  
pp. 2779-2782
Author(s):  
Pan Pan Yang ◽  
Yan Fang Xu ◽  
Na Gao ◽  
Ya Yuan Zhang
Keyword(s):  
Light Source ◽  
Ultraviolet Light ◽  
Vertical Direction ◽  
Luminescent Properties ◽  
Radiation Energy ◽  
Energy Data ◽  
Unique Color ◽  
Reflected Light ◽  
Dot Gain ◽  
To Receive

In recent years, fluorescent ink, with a unique color performance and the advantages of green non-toxic, fast drying, thin ink, etc., is widely used in packaging printing, security printing, and other fields. What’s more, the luminescent properties and the interaction with paper of fluorescent ink are pained more and more attention. In this experiment, an ultraviolet light source is used to motivate the samples to emit, the fiber spectrophotometer is used to receive the reflected light of the samples in the vertical direction of the samples. The tone rendering curve and dot gain curve are obtained according to the radiation energy data of the sample, the printing indicators of fluorescent ink are obtained by analyzing the reproducing image tone scale and dot expansion characteristics of ink on the paper.

A 3D Profile Parallel Detecting System Based on Differential Confocal Microscopy

2005 ◽  
Vol 295-296 ◽  
pp. 501-506
Author(s):  
Y.H. Wang ◽  
X.F. Yu ◽  
Ye Tai Fei
Keyword(s):  
Confocal Microscopy ◽  
Light Source ◽  
Sampling Interval ◽  
Differential Method ◽  
Reconstruction Method ◽  
Reflected Light ◽  
Measuring Efficiency ◽  
Working Principle ◽  
3D Profile ◽  
Profile Reconstruction

Based on the differential confocal microscopy principle, a non-scanning 3D profile detecting system is proposed. A 2D light source array produced by micro-optic components is used to form a parallel micro-confocal system. The whole field detecting of the measuring plane is realized. The reflected light beam is divided into two paths. Two CCD cameras work together to detect the facula array in a differential arrangement. A differential algorithm of facula intensity is used. The noise and the shift of light source can be avoided effectively. Using the linearity characteristic of the differential confocal system, the high axial resolution is achieved at a larger sampling interval. The measuring efficiency and accuracy can be increased. The construction and working principle of the 3D parallel detecting system and the 3D profile reconstruction method are investigated. Experiment results agree with the ones of theory analysis. It indicates that the differential method is applicable for non-scanning 3D profile detection.

Die Erzeugung sehr kurzer und intensiver UV-Lichtimpulse

1963 ◽  
Vol 18 (5) ◽  
pp. 590-593 ◽  
Author(s):  
L. Frommhold
Keyword(s):  
Light Source ◽  
Kerr Constant ◽  
Ultraviolet Region ◽  
Light Pulses ◽  
Kerr Cell

A KERR cell controlled spark light source for the production of 5 · 10-9 sec light pulses is described. The quartz ultraviolet region down to 1900 Ā wavelength may be transmitted using water as KERR cell liquid. Some properties of a water filled KERR cell are discussed. The KERR constant is found to be 10 · 107 esu at wavelengths between 2100 and 3000 Ā.

Reflected-light-source-based three-dimensional display with high brightness

2016 ◽  
Vol 55 (13) ◽  
pp. 3452 ◽  
Author(s):  
Guo-Jiao Lv ◽  
Fei Wu ◽  
Wu-Xiang Zhao ◽  
Jun Fan ◽  
Bai-Chuan Zhao ◽  
...  
Keyword(s):  
Light Source ◽  
Three Dimensional ◽  
High Brightness ◽  
Reflected Light ◽  
Three Dimensional Display

Design of a Fiber Optic Pressure Transducer

1977 ◽  
Vol 99 (1) ◽  
pp. 274-279 ◽  
Author(s):  
R. H. Pahler ◽  
A. S. Roberts
Keyword(s):  
Light Intensity ◽  
Light Source ◽  
Pressure Transducer ◽  
Fiber Optic ◽  
Light Guide ◽  
Circular Array ◽  
Analytic Procedure ◽  
Reflected Light ◽  
Cylindrical Metal ◽  
Selection Of

Performance characteristics of a fiber optic pressure transducer are presented and discussed. The transducer consists of a cylindrical metal housing with a specular reflecting aluminum diaphragm at the distal end and a circular array of fiber optic light guide bundles at the proximal end. The center bundle is connected to a light source with the surrounding bundles carrying reflected light to a photodetector. A change in pressure on the diaphragm produces a differential change in light intensity. An analytic procedure guides the selection of an optimal configuration in order to obtain maximum transducer response.

Development of Quantitative Analytical Instrument for Colloidal Gold Strips

2012 ◽  
Vol 591-593 ◽  
pp. 1872-1876 ◽  
Author(s):  
Yang Wang ◽  
Kai Jiang ◽  
Ping Wang
Keyword(s):  
Light Source ◽  
Colloidal Gold ◽  
Detection System ◽  
Test Strip ◽  
Step Motor ◽  
Test Results ◽  
Analytical Instrument ◽  
Photoelectric Detection ◽  
Reflected Light ◽  
Source Signals

A novel analytical instrument for quantitative testing colloidal gold strips is developed based on the principle of photoelectric detection. The test-strip analytical instrument uses green LEDs as the emitting light source and a photodiode as the receiving device for obtaining reflected light, and utilizes a step motor to drive detection system for scanning the examining areas. Modulation technique for light source signals and demodulation technique for receipt signals are used to eliminate the interference of the background noise. The test results indicate the system has high detection veracity rates with detecting errors less than 1%, and good detection stability with coefficient variables less than 2%.

Sign in / Sign up

Export Citation Format

Share Document