Research output

Research output per year 1993 1999 2000 2002 2005 2006 2009 2012 2013 2014 2024

• 96 Conference article in proceedings
• 88 Article
• 84 Working paper
• 10 Abstract
• 20 More
  • 7 Paper
  • 6 Book
  • 4 Conference article
  • 2 Anthology
  • 1 Commissioned report

Research output per year

Research output per year

Search results

• 2002

  High-intensity setup for measuring spectral irradiance responsivities of UV meters

  Envall, J., Kärhä, P. & Ikonen, E., 2002, p. 18-19, (5th Workshop on Ultraviolet Radiation Measurements, Kassandra, Halkidiki, Greece, October 7-8, 2002).

  Research output: Working paper › Professional

• Radiometric determination of radiation temperatures

  Kärhä, P., Noorma, M., Jankowski, T., Weckström, T. & Ikonen, E., 2002, p. 38, (Finnish Optics Days 2002, Kajaani, Finland, April 24-26, 2002).

  Research output: Working paper › Professional

• Study of fiber optic power measurements using photodiodes with and without integrating sphere

  Envall, J., Kärhä, P. & Ikonen, E., 2002, p. 74, (XXXVI Annual Conference of the Finnish Physical Society, Joensuu, Finland, March 14-16, 2002).

  Research output: Working paper › Professional

• Study of fiber optic power measurements using photodiodes with and without integrating sphere

  Kärhä, P., Envall, J. & Ikonen, E., 2002, USA, p. 129, (NEWRAD2002, Gaithersburg, USA, May 20-24, 2002).

  Research output: Working paper › Professional

• UVNews, The official newsletter of the Thematic Network for Ultraviolet Measurements, Issue 7

  Kärhä, P., 2002, Espoo, (UVNews).

  Research output: Working paper › Professional
• 2001

  Annual report 2000

  Karha, P., 2001, Espoo, p. 58, (Metrology Research Institute Report; no. Report 18/2001).

  Research output: Working paper › Professional

• Development of a national standard for fiber optic power

  Envall, J., Karha, P. & Ikonen, E., 2001, p. s. P3, (Optics Days 2001, Tampere, Finland, April 20-21, 2001).

  Research output: Working paper › Professional
• 2000

  Compact facility for High-accuracy measurements of spectral irradiance in the UV-VIS-NIR region

  Kubarsepp, T., Kärhä, P., Manoocheri, F., Nevas, S., Toivanen, P. & Ikonen, E., 2000, p. 141, (Northern Optics 2000, Uppsala, Sweden, June 6-8, 2000).

  Research output: Working paper › Professional

• UVNews

  Kärhä, P., 2000, Espoo, p. 28, (The official newsletter of the Thematic Network for Ultraviolet Measurements; no. Issue 5).

  Research output: Working paper › Professional

• UVNews

  Kärhä, P., 2000, Espoo, p. 40, (The offical newsletter of the Thematic Network for Ultraviolet Measurements; no. Issue 6).

  Research output: Working paper › Professional

• UVNews

  Kärhä, P., 2000, Espoo, p. 43, (The officielle newsletter of the Thematic Network for Ultraviolet Measurements UVNews; no. UVNews Isuue 4).

  Research output: Working paper › Professional

• UVNews

  Kärhä, P., 2000, Espoo, p. 148, (The offial newsletter of Thematic Network for Ultraviolet Measurements; no. Issue 6).

  Research output: Working paper › Professional
• 1999

  Absolute spectral irradiance measurements of quartz-halogen tungsten lamps in the spectral range 290-900 nm

  Kubarsepp, T., Kärhä, P., Manoocheri, F., Nevas, S., Ylianttila, L. & Ikonen, E., 1999, Espoo, p. 13, (Metrology Research Institute Report; no. 14/99).

  Research output: Working paper › Professional

• Characterization of a spectroradiometer used in the realization of the unit of spectral radiance

  Hovila, J., Toivanen, P., Kärhä, P. & Ikonen, E., 1999, p. 5, (Finnish Optics Day, Joensuu, Finland, April 23-24, 1999).

  Research output: Working paper › Professional

• Detector stabilized fel lamps as transfer standards in an international comparison of spectral irradiance

  Stock, K. D., Raatz, K. H., Kubarsepp, T., Kärhä, P., Ikonen, E. & Liedquist, L., 1999, p. 25, (Newrad '99, Madrid, Spain, October 25-27, 1999).

  Research output: Working paper › Professional

• Determination of uncertainties due to spectral transmittance measurements in filter radiometry

  Manoocheri, F., Nevas, S., Kärhä, P., Toivanen, P. & Ikonen, E., 1999, p. 32, (Newrad '99, Madrid, Spain, October 25-27, 1999).

  Research output: Working paper › Professional

• Häiriökysymykset - Häiriöt mittauksissa

  Häkkinen, E., Fallström, K., Haapalinna, A. & Kärhä, P., 1999, Espoo, p. 36.

  Research output: Working paper › Professional

• Interpolation of the quantum yield of silicon in the near UV

  Kubarsepp, T., Kärhä, P. & Ikonen, E., 1999, p. paper 2.19, (XXXIII Annual Conference of the Finnish Physical Society, Turku, Finland, March 4-6,1999).

  Research output: Working paper › Professional

• Interpretation of UV-effects on the internal quantum efficiency of silicon photodetectors

  Kubarsepp, T., Kärhä, P. & Ikonen, E., 1999, p. 18, (Third Workshop of the Thematic Network for UV-Measurements, Teddington, UK, September 8-10, 1999).

  Research output: Working paper › Professional

• Realisation of the units of luminance and spectral radiance at the Helsinki University of Technology

  Toivanen, P., Hovila, J., Kärhä, P. & Ikonen, E., 1999, p. 20, (Newrad '99, Madrid, Spain, October 25-27, 1999).

  Research output: Working paper › Professional

• UV News, The official newsletter of the Thematic Network for Ultraviolet Measurements

  Kärhä, P., 1999, Espoo, p. 28, (UV News; no. Issue 3).

  Research output: Working paper › Professional

• UV News, The official newsletter of the Thematic Network for Ultraviolet Measurements

  Kärhä, P., 1999, Espoo, p. 60, (UV News; no. Issue 2).

  Research output: Working paper › Professional
• 1998

  A new method for characterization of filter radiometers

  Toivanen, P., Lassila, A., Manoocheri, F., Kärhä, P. & Ikonen, E., 1998, Espoo, p. 7, (Metrology Research Institute Report; no. 12/98).

  Research output: Working paper › Professional

• A novel filter radiometer for spectral irradiance and luminous intensity measurements

  Kärhä, P., Blomgvist, T., Haapalinna, A., Toivanen, P., Manoocheri, F. & Ikonen, E., 1998, p. 19, (Finnish Optics Day, Oulu Finland, 24.-25.4.1998).

  Research output: Working paper › Professional

• Filter Radiometry Based on Direct Utilisation of trap detectors

  Kärhä, P., Toivanen, P., Haapalinna, A., Manoocheri, F. & Ikonen, E., 1998, p. paper 2.10, (The 1. Workshop of the Thematic Network for Ultraviolet Measurements, Helsinki, Finland, March 2-3, 1998).

  Research output: Working paper › Professional

• Linearity measurements of photodetectors

  Haapalinna, A., Kubarsepp, T., Kärhä, P. & Ikonen, E., 1998, p. 4, (Finnish Optics Day, Oulu, Finland, 24.-25.4.1998).

  Research output: Working paper › Professional

• Realization of the unit of luminance based on an integrating sphere source

  Toivanen, P., Kärhä, P. & Ikonen, E., 1998, p. paper 4.7, (The XXXI Annual Conference of the Finnish Physical Society, Tampere, Finland, March 19-21, 1998).

  Research output: Working paper › Professional

• The official newsletter of the Thematic Network for Ultraviolet Measurements

  Kärhä, P., 1998, Espoo, p. 30, (Thematic Network for Ultraviolet Measurements; no. Issue 1).

  Research output: Working paper › Professional
• 1996

  High accuracy photometric measurements

  Toivanen, P., Fagerlund, H., Kärhä, P., Lassila, A., Manoocheri, F. & Ikonen, E., 1996, p. paper 8:10, (The XXX Annual Conference of the Finnish Physical Society, Helsinki, March 21-23, 1996).

  Research output: Working paper › Professional
• 1995

  Elektroninen mittaustekniikka; Laskut ja laboratoriotyöt

  Fagerlund, H., Junttila, M.-L. & Kärhä, P., 1995, Espoo, p. 75.

  Research output: Working paper › Professional

• Laatukäsikirja

  Kärhä, P., 1995, Espoo, p. 27, (Quality Manual).

  Research output: Working paper › Professional

• Quality Manual of Optical Power Laboratory

  Kärhä, P., Lassila, A. & Ludvigsen, H., 1995, Espoo, p. 22, (Quality Manual).

  Research output: Working paper › Professional
• 1994

  Comparison of silicon trap detectors with cryogenic absolute radiometer

  Lassila, A., Kärhä, P. & Ikonen, E., 1994, Espoo, p. 5, (Metrology Research Institute Report; no. 5/94).

  Research output: Working paper › Professional
• 1993

  Construction and Test Measurements of a Trap Detector for Optical Power Measurements

  Kärhä, P. & Ikonen, E., 1993, Espoo, p. 28, (Metrology Research Institute Report; no. 2/93).

  Research output: Working paper › Professional