| Advantages of white LED lamps and new detector technology in photometry T Pulli, T Dönsberg, T Poikonen, F Manoocheri, P Kärhä, E Ikonen Light: Science & Applications 4 (9), e332-e332, 2015 | 228 | 2015 |
| Spectral reflectance of silicon photodiodes A Haapalinna, P Kärhä, E Ikonen Applied optics 37 (4), 729-732, 1998 | 79 | 1998 |
| Nonlinearity measurements of silicon photodetectors T Kübarsepp, A Haapalinna, P Kärhä, E Ikonen Applied optics 37 (13), 2716-2722, 1998 | 78 | 1998 |
| Measurement of the absolute linearity of photodetectors with a diode laser A Haapalinna, T Kübarsepp, P Kärhä, E Ikonen Measurement Science and Technology 10 (11), 1075, 1999 | 73 | 1999 |
| Development of a detector-based absolute spectral irradiance scale in the 380–900-nm spectral range P Kärhä, P Toivanen, F Manoochehri, E Ikonen Applied Optics 36 (34), 8909-8918, 1997 | 62 | 1997 |
| Spectral irradiance measurements of tungsten lamps with filter radiometers in the spectral range 290 nm to 900 nm T Kübarsepp, P Kärhä, F Manoocheri, S Nevas, L Ylianttila, E Ikonen Metrologia 37 (4), 305, 2000 | 52 | 2000 |
| Laadukkaan mittaamisen perusteet E Hiltunen, L Linko, S Hemminki, M Hägg, E Järvenpää, P Saarinen, ... Mittatekniikan keskus, 2011 | 48 | 2011 |
| Characterization of a polarization-independent transmission trap detector T Kübarsepp, P Kärhä, E Ikonen Applied optics 36 (13), 2807-2812, 1997 | 48 | 1997 |
| Interpolation of the spectral responsivity of silicon photodetectors in the near ultraviolet T Kübarsepp, P Kärhä, E Ikonen Applied optics 39 (1), 9-15, 2000 | 46 | 2000 |
| Relationships between junction temperature, electroluminescence spectrum and ageing of light-emitting diodes A Vaskuri, P Kärhä, H Baumgartner, O Kantamaa, T Pulli, T Poikonen, ... Metrologia 55 (2), S86, 2018 | 43 | 2018 |
| Radiometric realization of the candela with a trap detector E Ikonen, P Kärhä, A Lassila, F Manoochehri, H Fagerlund, L Liedquist Metrologia 32 (6), 689, 1995 | 41 | 1995 |
| Optical power and transmittance measurements and their use in detector-based realization of the luminous intensity scale P Kaerhae, A Lassila, H Ludvigsen, F Manoochehri, H Fagerlund, ... Optical engineering 34 (9), 2611-2618, 1995 | 41 | 1995 |
| Realization of the unit of luminous intensity at the HUT P Toivanen, P Kärhä, F Manoochehri, E Ikonen Metrologia 37 (2), 131, 2000 | 37 | 2000 |
| New source and detector technology for the realization of photometric units T Dönsberg, T Pulli, T Poikonen, H Baumgartner, A Vaskuri, M Sildoja, ... Metrologia 51 (6), S276, 2014 | 32 | 2014 |
| Spectral irradiance model for tungsten halogen lamps in 340–850 nm wavelength range M Ojanen, P Kärhä, E Ikonen Applied optics 49 (5), 880-886, 2010 | 31 | 2010 |
| Method for analysing luminous intensity of light-emitting diodes P Manninen, J Hovila, P Kärhä, E Ikonen Measurement Science and Technology 18 (1), 223, 2006 | 31 | 2006 |
| Characterisation of optical detectors using high-accuracy instruments F Manoochehri, P Kärhä, L Palva, P Toivanen, A Haapalinna, E Ikonen Analytica chimica acta 380 (2-3), 327-337, 1999 | 31 | 1999 |
| Characterizing a UV chamber with mercury lamps for assessment of comparability to natural UV conditions A Heikkilä, P Kärhä, A Tanskanen, M Kaunismaa, T Koskela, J Kaurola, ... Polymer testing 28 (1), 57-65, 2009 | 28 | 2009 |
| Determination of the diffuser reference plane for accurate illuminance responsivity calibrations J Hovila, M Mustonen, P Kärhä, E Ikonen Applied optics 44 (28), 5894-5898, 2005 | 27 | 2005 |
| Determination of distance offsets of diffusers for accurate radiometric measurements P Manninen, J Hovila, L Seppälä, P Kärhä, L Ylianttila, E Ikonen Metrologia 43 (2), S120, 2006 | 26 | 2006 |
