Light-trap design using multiple reflections and solid-angle attenuation: application to a spaceborne electron spectrometer

1992 ◽  
Vol 31 (25) ◽  
pp. 5331 ◽  
Author(s):  
Federico A. Herrero
Keyword(s):  
Solid Angle ◽  
Light Trap ◽  
Electron Spectrometer ◽  
Multiple Reflections ◽  
Trap Design

scholarly journals Do Different LED Colours Influence Sand Fly Collection by Light Trap in the Mediterranean?

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Gabriella Gaglio ◽  
Ettore Napoli ◽  
Francesca Arfuso ◽  
Jessica Maria Abbate ◽  
Salvatore Giannetto ◽  
...  
Keyword(s):  
Light Trap ◽  
Mediterranean Area ◽  
Sand Fly ◽  
Sand Flies ◽  
Light Traps ◽  
Trap Design ◽  
Phlebotomine Sand Flies ◽  
Positive Effects ◽  
Uv Led ◽  
The Mediterranean

Light traps represent the most used attractive system to collect and monitor phlebotomine sand flies. Recent studies have suggested that light traps can be easily upgraded by the use of light-emitting diode (LED) with positive effects on trap design, weight, and battery life. However, scant data on the effect of different LED colours on the attractiveness to phlebotomine sand fly species are available in literature. In this study, the capture performances of light traps equipped with different LED colours on phlebotomine sand fly species indigenous in the Mediterranean area were evaluated. Phlebotomine sand fly collections were performed using a classical light trap (CLT), equipped with a traditional incandescent lamp, and five Laika 4.0 light traps supplied, each with LED of different colours and wavelengths: (i) white; (ii) red; (iii) green; (iv) blue; (v) UV. Light traps were set for three consecutive nights fortnightly from May to October 2017 and climate data recorded using a meteorological station. A total of 411 phlebotomine sand flies (191 males and 220 females), belonging to three different species, namely, Phlebotomus perniciosus (n= 298, 141 males and 157 females), Sergentomyia minuta (n=110, 48 males and 62 females), and Phlebotomus neglectus (n=3, 2 males and 1 females) were collected. Abundance of capture was influenced by colours of LED and time. The highest number of phlebotomine sand flies was captured on June (P<0.01) and by UV LED (P<0.01). As regard to species, P. perniciosus was mainly captured by UV LED on June (P<0.01). No effect of time (P>0.05) or LED colour (P>0.05) was recorded for S. minuta and P. neglectus. According to the results of the present study light trap equipped with UV LED can represent an effective tool for the capture of sand fly species in the Mediterranean area.

A METHOD FOR SAMPLING LARVAL AND EMERGING INSECTS USING AN AQUATIC BLACK LIGHT TRAP

1971 ◽  
Vol 103 (10) ◽  
pp. 1365-1369 ◽  
Author(s):  
Donald Carlson
Keyword(s):  
Aquatic Insects ◽  
Light Trap ◽  
Trap Design ◽  
Black Light ◽  
Emerging Insects ◽  
Overall Effectiveness

AbstractA method is described for sampling aquatic insects using black light. Trap design, description of its placement, and conversion to a fumigator is explained. Total numbers of emerging insects captured by aquatic light trap are given and compared with catches in surface and bottom cone traps. Overall effectiveness of the black light trap is discussed.

An automated modular light-trap design

1996 ◽  
Vol 19 (1) ◽  
pp. 81-85 ◽  
Author(s):  
E. G. White
Keyword(s):  
Light Trap ◽  
Trap Design

Effects of light-trap design and illumination on samples of moths in an English woodland

1974 ◽  
Vol 63 (4) ◽  
pp. 583-594 ◽  
Author(s):  
L. R. Taylor ◽  
R. A. French
Keyword(s):  
Spatial Model ◽  
Light Trap ◽  
Mercury Vapour ◽  
Tungsten Filament ◽  
Trap Design ◽  
A Site

AbstractOperated in sheltered woodland, the samples obtained by Rothamsted tungsten-filament and Robinson mercury-vapour traps are best described by a spatial model different from that used in a site exposed to wind. Differences between the proportions of Noctuidae and Geometridae were accountable to differences in height of flight. The Rothamsted traps gave more consistent samples than the Robinson traps and averaged about onequarter the number of moths.

scholarly journals Non-resonant power-efficient directional Nd:YAG ceramic laser using a scattering cavity

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
KyeoReh Lee ◽  
Ho Jin Ma ◽  
Fabian Rotermund ◽  
Do Kyung Kim ◽  
YongKeun Park
Keyword(s):  
Power Efficiency ◽  
Laser Emission ◽  
Light Trap ◽  
Light Sources ◽  
Trap Design ◽  
Power Efficient ◽  
Practical Applications ◽  
Laser Gain ◽  
Resonant Laser ◽  
Operation Characteristics

AbstractNon-resonant lasers exhibit the potential for stable and consistent narrowband light sources. Furthermore, non-resonant lasers do not require well-defined optics, and thus has considerably diversified the available types of laser gain materials including powders, films, and turbid ceramics. Despite these intrinsic advantages, the practical applications of non-resonant lasers have been limited so far, mainly because of their low power efficiency and omnidirectional emission. To overcome these limitations, here we propose a light trap design for non-resonant lasers based on a spherical scattering cavity with a small entrance. Using a porous Nd3+:YAG ceramic, directional laser emission could be observed with significant enhancements in the slope efficiency and linewidth (down to 32 pm). A theoretical model is also developed to describe and predict the operation characteristics of proposed non-resonant laser.

Trap design for monitoring moth biodiversity in tropical rainforests

1999 ◽  
Vol 89 (2) ◽  
pp. 153-163 ◽  
Author(s):  
J. Intachat ◽  
I.P. Woiwod
Keyword(s):  
Tropical Rainforest ◽  
Light Trap ◽  
Peninsular Malaysia ◽  
Tropical Rainforests ◽  
Mercury Vapour ◽  
Trap Design ◽  
Dipterocarp Forest ◽  
Tropical Conditions ◽  
Lowland Dipterocarp Forest ◽  
Experimental Comparisons

AbstractExperimental comparisons were made between samples of moths obtained by Rothamsted tungsten-filament and Robinson mercury-vapour light-traps operating in a lowland dipterocarp forest in Peninsular Malaysia. The Rothamsted trap gave more uniform and consistent samples and performed better in the tropical conditions than the Robinson trap. There were no significant differences between the overall measurement of diversity for the group Geometroidea between the two trap designs although the Robinson trap was much more erratic from night to night. The total catch of non-Geometroidea moths was remarkably similar in the two trap types. The choice of appropriate light-trap designs for biodiversity studies in tropical rainforest is discussed.

New light trap design for stray light reduction for a polarized scanning nephelometer

2019 ◽  
Vol 90 (3) ◽  
pp. 035113
Author(s):  
Qiang Hu ◽  
Zhenwei Qiu ◽  
Jin Hong ◽  
Dihu Chen
Keyword(s):  
Light Trap ◽  
Stray Light ◽  
Trap Design ◽  
Light Reduction

Effects of light-trap design and illumination of samples of moths in the Kenya highlands

1972 ◽  
Vol 62 (1) ◽  
pp. 91-112 ◽  
Author(s):  
L. R. Taylor ◽  
E. S. Brown
Keyword(s):  
Diversity Index ◽  
Light Trap ◽  
Three Dimensional ◽  
Mercury Vapour ◽  
Trap Design ◽  
Sample Distribution ◽  
Mercury Vapour Lamp ◽  
Representational Model ◽  
Definition Of ◽  
Size Interaction

The effect on the size of sample of 32 taxa of Macrolepidoptera, and on the index of diversity α, of various modifications of the light in Rothamsted and Muguga light-traps was investigated in experiments at Muguga, Kenya, in 1968. The sample of moths from the standard Muguga mercury-vapour trap was fifty times as big as that from the standard Rothamsted Tungsten trap. Using a mixed mercury-vapour and tungsten lamp in a Muguga trap halved the sample, as also would obscuring 60% of the light from a standard mercury-vapour lamp. Overall size of sample, direction of illumination and source of illumination all affected the proportion of different taxa in the sample, but the diversity index differed little in any of the combinations of traps, lamps and sites. Analysis of the pattern of sample distribution over the site showed that moths of all sizes were migrating downwind and height of flight was found to be positively correlated with size. Interaction between traps and sites, combined with the differing heights of flight of the different taxa, complicated the definition of specific sample size; a three-dimensional representational model attempts to define the spatial population parameters required to define the specific sample.

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