Radiometer Photopic Sensor is used with the Solar Light UV Radiometers
Features & Applications: The Radiometer
Scotopic Sensor is a portable illumination detector (Lux detector)
with spectral response following the CIE scotopic action spectrum.
This sensor is designed to have a spectral response like that of
the human eye's visual response in the photopic (dark adapted)
region.
The spectral
response of the human eye changes with light intensity. The eye
has two distinctive spectral responses, which are defined according
to the brightness of the light entering the eye. The first spectral
response of the eye occurs under typical daytime lighting conditions
(photopic) defined for light intensity greater than 0.1 Lux.
The second spectral response occurs under low light conditions
(scotopic) defined for light intensity between 0.01 and 0.0001
Lux. Light intensity less than 0.0001 Lux is undetectable by
the human eye. The eye's shift from the photopic response to
the scotopic response is known as the Purkinje shift. The scotopic
spectral luminous efficiency curve peaks at 507 nm and it is
normalized to 1
at that wavelength.
The power-like
unit of brightness-sensation-producing ability of light is lumen
[lm]. The relationship between effective Watts and scotopic lumen
is now assumed to be 1754 lm/W. For example, 507-nm monochromatic
radiation flux of 0.0001W would carry the scotopicluminous flux
of 0.1754 lm. Please note, that photopic spectral luminous efficiency
as well as the conversion factor between Watts and photopic lumens
differ from their scotopic counterparts.
Features:
- NIST Certification
- High sensitivity
- Wide dynamic
range
- Excellent
long term stability
- Cosine corrected
- Selectable
units
- Needs to be
used with a radiometer
Applications:
- Low light
level testing Night vision technology Display and illuminator
testing Luminescence and fluorescence Photography and film
studios
- Clinical studies
Spec
Summary:
Spectral
response: |
Follows CIE scotopic spectral
luminous efficiency curve (400-600nm) |
Angular
response: |
5% for angles <60° |
Range: |
200,000 scotopic mLux, 20,000
mft-cd, 120,000 µW/m2 |
Display
resolution: |
1 mLux 0.1 mft-cd 1 µW/m2 |
Operating
environment: |
32 to 120 °F (0 to +50 °C)
no precipitation |
Cable: |
1ft, retractable to 5ft (0.3m/1.5m) |
Diameter: |
1.6" (40.6 mm) |
Height: |
1.8" (45.8 mm) |
Weight: |
7.1 oz. (200 grams) |
|
