Fluorescent light source with continuously tunable polarization via modification of molecular orientation

2013 ◽  
Vol 114 (8) ◽  
pp. 083508 ◽  
Author(s):  
Suk-Hwan Joo ◽  
Jang-Kyum Kim ◽  
Jang-Kun Song
Keyword(s):  
Light Source ◽  
Molecular Orientation ◽  
Fluorescent Light

scholarly journals INFLUENCE OF LIGHT SOURCE ON THE GROWTH OF ALFALFA CULTIVARS

1973 ◽  
Vol 53 (2) ◽  
pp. 291-294 ◽  
Author(s):  
D. H. HEINRICHS
Keyword(s):  
Protein Content ◽  
Light Source ◽  
Germ Plasm ◽  
Red Light ◽  
Fluorescent Light ◽  
Medicago Falcata ◽  
Definite Trend ◽  
Growth Room ◽  
Yellow Orange ◽  
Genetic Makeup

Alfalfa produced more herbage and more roots in a growth room when the fluorescent portion of an incandescent-fluorescent light source consisted of half gro-lux, high in blue-green-red light and half cool-white, high in blue-green-yellow-orange light than when it consisted of either alone. Protein content and degree of flowering were not affected by light source variations. Alfalfa cultivars, ranging in genetic makeup from Medicago falcata to M. media and M. sativa types, responded similarly to variations in light source. There was a definite trend for cultivars to produce less herbage and fewer roots as the proportion of M. falcata germ plasm in them increased. M. falcata flowered later than M. sativa in the growth room.

Tuning characteristics of fluorescent light source by dye-doped liquid crystal filled hollow fiber

2017 ◽  
Vol 66 (15) ◽  
pp. 154205
Author(s):  
L Yue-Lan ◽  
Yin Xiang-Bao ◽  
Yang Yue ◽  
Liu Yong-Jun ◽  
Yuan Li-Bo
Keyword(s):  
Liquid Crystal ◽  
Light Source ◽  
Hollow Fiber ◽  
Fluorescent Light

scholarly journals Use of a Fluorescent Light Source as an Adjunct to Traditional Methods to Detect Composite Resin Dental Restorations

2018 ◽  
Vol 7 (2) ◽  
pp. 79-84
Author(s):  
Dean Kolbinson ◽  
Brendon Reynaud ◽  
Andrew Doig ◽  
Eric Tuttosi ◽  
Alan Heinrichs ◽  
...  
Keyword(s):  
Light Source ◽  
Composite Resin ◽  
Fluorescent Light ◽  
Traditional Methods ◽  
Dental Restorations

Performance of Arabidopsis thaliana under different light qualities: comparison of light-emitting diodes to fluorescent lamp

2017 ◽  
Vol 44 (7) ◽  
pp. 727 ◽  
Author(s):  
Karin Köhl ◽  
Takayuki Tohge ◽  
Mark Aurel Schöttler
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Source ◽  
Light Emitting Diodes ◽  
Seed Mass ◽  
Fluorescent Light ◽  
Chlorophyll Fluorescence Parameters ◽  
Light Emitting ◽  
Led Light ◽  
Improve Energy Efficiency ◽  
Fluorescent Lamps

For precise phenotyping, Arabidopsis thaliana (L.) Heynh. is grown under controlled conditions with fluorescent lamps as the predominant light source. Replacement by systems based on light emitting diodes (LED) could improve energy efficiency and stability of light quality and intensity. To determine whether this affects the reproducibility of results obtained under fluorescent lamps, four Arabidopsis accessions and a phytochrome mutant were grown and phenotyped under two different LED types or under fluorescent lamps. All genotypes had significantly higher rosette weight and seed mass and developed faster under LED light than under fluorescent lamps. However, differences between genotypes were reproducible independent of the light source. Chlorophyll content, photosynthetic complex accumulation and light response curves of chlorophyll fluorescence parameters were indistinguishable under LED and fluorescent light. Principal component analysis of leaf metabolite concentrations revealed that the effect of a change from fluorescent light to LED light was small compared with the diurnal effect, which explains 74% of the variance and the age effect during vegetative growth (12%). Altogether, the replacement of fluorescent lamps by LED allowed Arabidopsis cultivation and reproduction of results obtained under fluorescent light.

Fluorescent light source (FLS) with low-temperature poly-Si TFT driver

1994 ◽  
Author(s):  
Ken-ichi Nakamura ◽  
Hideki Asada ◽  
Toshiyuki Akiyama ◽  
Kenji Sera ◽  
Hiroshi Tanabe ◽  
...  
Keyword(s):  
Low Temperature ◽  
Light Source ◽  
Fluorescent Light

scholarly journals LED Light Source: Major Advance in Fluorescence Microscopy

2008 ◽  
Vol 16 (5) ◽  
pp. 28-29 ◽  
Author(s):  
Becky Hohman
Keyword(s):  
Fluorescence Microscopy ◽  
Light Source ◽  
Background Noise ◽  
Fluorescent Dyes ◽  
Fluorescent Light ◽  
Major Advance ◽  
Root Cause ◽  
Intense Light ◽  
Mitigation Techniques ◽  
Bleed Through

Fluorescence microscopy requires an intense light source at the specific wavelength that will excite fluorescent dyes and proteins. The traditional method employs a white light, typically from a Mercury or Xenon arc lamp. Although such broad-spectrum lamps can generate ample light at desired wavelengths, only a small percentage of the projected light is useful in any particular application. The other wavelengths need to be suppressed to avoid background noise that reduces image contrast and obscures the fluorescent light emissions.This process of suppressing extraneous light is complex, expensive, and only partially effective: even after decades of refinements, the best filters are not 100% percent successful at blocking the bleed through of non-specific photons. Some mitigation techniques end up not only suppressing peripheral light, but also significantly diminishing the intensity of the desired wavelengths. To address the root cause of the problem – the presence of non-specific photons – a radically different approach is coming to light.

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