Knowledge Q&A Archives

What is the recommended measuring distance using UPRtek handheld spectrometer?

by marketing | Sep 27, 2020 | Knowledge Q&A

What is the recommended measuring distance using UPRtek handheld spectrometer? Tech Notes It depends on users’application needs. Users can adjust the distance of measuring based on their requirements. For example, when a designer sets up the internal lighting and...

What is Cosine Correction？

by marketing | Sep 27, 2020 | Knowledge Q&A

What is Cosine Correction？ Tech Notes Cosine is a mathematical function used to calculate and specify the characteristics (length & angles) of triangles (Trigonometry). Below right picture is the cosine correction comparison between MK350S Premium and Lambert’s...

WHAT IS TLA (TEMPORAL LIGHT ARTIFACTS) ?

by marketing | Sep 27, 2020 | Knowledge Q&A

WHAT IS TLA (TEMPORAL LIGHT ARTIFACTS) ? Flicker An undesired change in visual perception induced by a light stimulus whose luminance or spectral distribution fluctuates with time, for an observer in a certain environment. Flicker ...

What is Flicker Metrics (Percent Flicker, Flicker Index, SVM) ?

by marketing | Sep 26, 2020 | Knowledge Q&A

What is Flicker Metrics (Percent Flicker, Flicker Index, SVM) ? Flicker This article compares three flicker metrics regarding percent flicker, flicker index and SVM. The comparison includes the definition comes from which organization, the definition of itself,...

WHAT IS IES TM-30-15?

by marketing | Sep 26, 2020 | Knowledge Q&A

WHAT IS IES TM-30-15? Light Color The Technical Memorandum, TM-30-15, the new method published by IES in 2015 and has been proposed to the CIE. This new color evaluation function is expected to provide the angle of technological innovation for light source measuring,...

WHAT IS CQS (COLOR QUALITY SCALE)?

by marketing | Sep 26, 2020 | Knowledge Q&A

WHAT IS CQS (COLOR QUALITY SCALE)? Light Color The CQS（Color Quality Scale）is a new light source quality parameter developed by NIST （National Institute of Standards and Technology）for the new solid-state lighting markets. As we mentioned in the article on what...