The PMA2135 Photopic flash detector provides
for accurate peak irradiance measurements with a spectral response which follows the CIE
photopic action spectrum, the human eye’s visual response. The eye has
three
distinctive regions of response. The first region is the response of the eye under typical
lighting conditions (photopic) defined as intensities greater than about 0.1 Lux.
The second region is a transitional region
known as the Purkinje region defined as intensities between about 0.01 and
0.1 Lux. The third region is the dark adapted region of the human eye (scotopic) defined as
intensities between about 0.01 and 0.0001 Lux. Intensities less than
0.0001 Lux are undetectable with the human eye.
These three regions have distinctive spectral responses. See figure 1 for spectral response. This detector is ideal for measuring flash lamps used in the curing industry.
The peak intensity of a flashed source is much higher then continuous sources. The PMA2135 Photopic flash detector captures the peak intensity and displays it on the PMA2100 for a period of 5 seconds. In addition to the peak intensity, the PMA2135 also integrates and holds the dose of a single pulse.
The peak intensity of the radiation is measured in mW/cm2 or W/cm2. The full scale is specified by the user when ordred. The dose has a full scale in mJ/cm2 or J/cm2.
The photodetector has an active area of 0.474 inches
The Teflon hemisphere results in the photopic detector having an exceptionally good cosine response. This response allows for accurate measurements of both point and extended light sources.
- Captures Peak Irradiance and effective energy
- Excellent long term stability
- Cosine corrected
- NIST traceable calibration
- Radiometric units
Applications
- Laboratory and industrial radiometry
- Flash curing
- Strobe lighting
