P. Toivanen

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

Petri Kärhä, P. Toivanen, Farshid Manoochehri et al. · Applied Optics · 1997 · 48 citations

Natural Sciences, Chemistry, Optics +16

An optical method for direct determination of the radiometric aperture area at high accuracy

Antti Lassila, P. Toivanen, Erkki Ikonen · Measurement Science and Technology · 1997 · 38 citations

Engineering, Physics, Optics +11

A new optical method for high-accuracy determination of aperture area

Erkki Ikonen, P. Toivanen, Antti Lassila · Metrologia · 1998 · 37 citations

Engineering, Optometry, Optics +14

Realization of the unit of luminous intensity at the HUT

P. Toivanen, P K rh, Farshid Manoochehri et al. · Metrologia · 2000 · 27 citations

Engineering, Electrical Engineering, Metrology +9

Characterisation of optical detectors using high-accuracy instruments

Farshid Manoochehri, Petri Kärhä, L. Palva et al. · Analytica Chimica Acta · 1999 · 25 citations

Engineering, Electrical Engineering, Instrumentation +13