P Kärhä

Effect of adaptive control on the LED street luminaire lifetime and on the lifecycle costs of a lighting installation

H Baumgartner, J Askola, P Kärhä, 2021, Lighting Research & Technology.

Development of a detector-based absolute spectral irradiance scale in the 380-900-nm spectral range.

P Kärhä, E Ikonen, E. Ikonen, 1997, Applied optics.

Method for characterization of filter radiometers.

P Kärhä, E Ikonen, E. Ikonen, 1999, Applied optics.

Nonlinearity measurements of silicon photodetectors.

P Kärhä, E Ikonen, E. Ikonen, 1998, Applied optics.

Spectral reflectance of silicon photodiodes.

P Kärhä, E Ikonen, E. Ikonen, 1998, Applied optics.