Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Determination of the diffuser reference plane for accurate illuminance responsivity calibrations.

Jari Hovila1, Maria Mustonen, Petri Kärhä

  • 1Metrology Research Institute, Helsinki University of Technology, P.O. Box 3000, FI-02015 TKK, Finland. jari.hovila@tkk.fi

Applied Optics
|October 20, 2005
PubMed
Summary

Accurately determining the reference plane in photometers with dome diffusers is crucial for precise illuminance responsivity calibration. Our inverse-square law method precisely locates this plane, significantly reducing systematic errors in measurements.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Improving UV Stability of SiO<sub>2</sub>/SiN<sub>x</sub>-Passivated Silicon Photodiodes Through Shallow Junction Implantation and Oxide Regrowth.

Sensors (Basel, Switzerland)·2026
Same author

Spectral characterization of three wearable electronic ultraviolet radiation dosimeters.

Photochemistry and photobiology·2026
Same author

Infrared-A (IR-A) modulates the p53 pathway and diurnal clock in human skin and subcutaneous adipose tissue in vivo.

Journal of photochemistry and photobiology. B, Biology·2025
Same author

Real-time measurement of metals in submicron aerosols with particle-into-liquid sampler combined with micro-discharge optical emission spectroscopy.

Environmental monitoring and assessment·2024
Same author

Infrared-A to improve mood: an exploratory study of water-filtered infrared-A (wIRA) exposure.

Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology·2024
Same author

Terahertz radiation detection with a cantilever-based photoacoustic sensor.

Optics express·2022

Area of Science:

  • Optical metrology
  • Photometry and radiometry
  • Instrument calibration

Background:

  • Dome-shaped diffusers in commercial photometers and radiometers present challenges in identifying the effective measurement plane.
  • Inaccurate knowledge of this reference plane can introduce significant systematic errors during illuminance responsivity calibration.

Purpose of the Study:

  • To propose and validate a novel method for accurately determining the reference plane of dome-shaped diffusers in photometers.
  • To mitigate systematic errors in illuminance responsivity calibration by precisely locating the measurement plane.

Main Methods:

  • Utilized the inverse-square law, relating measured signal to the distance from a light source, to determine the reference plane.
  • Demonstrated the method on three commercial photometers featuring dome diffusers of varying geometries.

Related Experiment Videos

Main Results:

  • Successfully determined the effective reference plane shifts for the tested photometers: 5.0 ± 0.5 mm, 7.8 ± 0.3 mm, and 8.5 ± 0.7 mm.
  • Reduced systematic measurement errors, previously up to 2%, to statistical uncertainty levels of approximately 0.2%.

Conclusions:

  • The proposed inverse-square law-based method provides an accurate means to establish the reference plane for dome-shaped diffusers.
  • Implementing this method significantly enhances the precision of photometer illuminance responsivity calibration by minimizing systematic errors.