Light losses in hollow, prismatic light guides related to prism defects: a transmittance model

2015 ◽  
Vol 13 (9) ◽  
pp. 092201-92205 ◽  
Author(s):  
Berta Garcia-Fernandez Berta Garcia-Fernandez ◽  
Daniel Vazquez-Molini Daniel Vazquez-Molini ◽  
Antonio Alvarez Fernandez-Balbuena Antonio Alvarez Fernandez-Balbuena ◽  
Angel Garcia-Botella Angel Garcia-Botella ◽  
Juan Carlos Martinez Anton Juan Carlos Martinez Anton
Keyword(s):  
Light Losses ◽  
Light Guides

Daylight in buildings based on tubular light guides

2021 ◽  
pp. 102608
Author(s):  
Stanislav Darula ◽  
Jitka Mohelníková ◽  
Jakub Král
Keyword(s):  
Light Guides

scholarly journals C. elegans discriminates colors to guide foraging

Science ◽  
2021 ◽  
Vol 371 (6533) ◽  
pp. 1059-1063 ◽  
Author(s):  
D. Dipon Ghosh ◽  
Dongyeop Lee ◽  
Xin Jin ◽  
H. Robert Horvitz ◽  
Michael N. Nitabach
Keyword(s):  
Stress Response ◽  
Cellular Stress ◽  
Color Discrimination ◽  
Cellular Stress Response ◽  
Blue Pigment ◽  
Natural Environments ◽  
C Elegans ◽  
Evolutionarily Conserved ◽  
Foraging Decisions ◽  
Light Guides

Color detection is used by animals of diverse phyla to navigate colorful natural environments and is thought to require evolutionarily conserved opsin photoreceptor genes. We report that Caenorhabditis elegans roundworms can discriminate between colors despite the fact that they lack eyes and opsins. Specifically, we found that white light guides C. elegans foraging decisions away from a blue-pigment toxin secreted by harmful bacteria. These foraging decisions are guided by specific blue-to-amber ratios of light. The color specificity of color-dependent foraging varies notably among wild C. elegans strains, which indicates that color discrimination is ecologically important. We identified two evolutionarily conserved cellular stress response genes required for opsin-independent, color-dependent foraging by C. elegans, and we speculate that cellular stress response pathways can mediate spectral discrimination by photosensitive cells and organisms—even by those lacking opsins.

Effect of Distance on the Power Density from Two Light Guides

2000 ◽  
Vol 12 (6) ◽  
pp. 320-327 ◽  
Author(s):  
RICHARD B. PRICE ◽  
TORE DÉRAND ◽  
MARY SEDAROUS ◽  
PANTELIS ANDREOU ◽  
ROBERT W. LONEY
Keyword(s):  
Power Density ◽  
Light Guides

Measuring the dispersion characteristics of fiber light-guides

1986 ◽  
Vol 29 (6) ◽  
pp. 514-524
Author(s):  
S. V. Tikhomirov ◽  
T. N. Khleskova
Keyword(s):  
Dispersion Characteristics ◽  
Light Guides

Evaluation of advanced methods and materials for construction of scintillation detector light guides

2021 ◽  
pp. 109979
Author(s):  
Raymond R. Raylman ◽  
Matthew B. Johnson ◽  
Joshua Bintrim ◽  
Vikum Dewasurendra ◽  
Kelsey Crawford ◽  
...  
Keyword(s):  
Scintillation Detector ◽  
Light Guides
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