Solid-state light sources for distance-measuring equipment

1964 ◽  
Vol 52 (1) ◽  
pp. 101-101 ◽  
Author(s):  
A.E. Harrison
Keyword(s):  
Solid State ◽  
Measuring Equipment ◽  
Light Sources ◽  
Distance Measuring

Development of a three-dimensional color rendition space for tunable solid-state light sources

2021 ◽  
Vol 2021 (29) ◽  
pp. 136-140
Author(s):  
Dorukalp Durmus
Keyword(s):  
Solid State ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Color Discrimination ◽  
Continuous Measure ◽  
Light Sources ◽  
Vast Number ◽  
Lighting Systems ◽  
Single Number

The quality of building electric lighting systems can be assessed using color rendition metrics. However, color rendition metrics are limited in quantifying tunable solid-state light sources, since tunable lighting systems can generate a vast number of different white light spectra, providing flexibility in terms of color quality and energy efficiency. Previous research suggests that color rendition is multi-dimensional in nature, and it cannot be simplified to a single number. Color shifts under a test light source in comparison to a reference illuminant, changes in color gamut, and color discrimination are important dimensions of the quality of electric light sources, which are not captured by a single-numbered metric. To address the challenges in color rendition characterization of modern solid-state light sources, the development of a multi-dimensional color rendition space is proposed. The proposed continuous measure can quantify the change in color rendition ability of tunable solid-state light devices with caveats. Future work, discretization of the continuous color rendition space, will be carried out to address the shortcomings of a continuous three-dimensional space.

scholarly journals Atmospheric limitations on electronic distance measuring equipment

1959 ◽  
Author(s):  
Moody C Jr Thompson ◽  
Harris B Janes ◽  
Frank E Freethey
Keyword(s):  
Measuring Equipment ◽  
Distance Measuring
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