ECE532 Biomedical Optics © 1998 Steven L. Jacques, Scott A. Prahl Oregon Graduate Institute

1. Radiometry

LECTURE:

• Radiant Power
  • Experiment: light bulb immersed in black water
  • Experiment: laser aimed into black water
• Radiant Intensity
  • Example: radiant intensity of a flashlight
• Irradiance
  • Example: irradiance of a flashlight beam on a wall
  • Fluence rate
  • Radiant Exittance
• Radiance
  • Example: radiance of a flashlight
• Collection of light
  • Apertures
    • Simple aperture to collect collimated laser beam
    • Simple aperture to collect restricted solid angle of light
    • Aperture of an integrating sphere
  • Optical fiber
  • Isotropic collector
• Detection of light
• Eye safety

LAB:

• Calibrating a light source by heating a black object
• Simulated eye
• Goniometry (measuring angular patterns of intensity)