Irradian Limited
L203 Photometer
6
(continued):
PHOTOPIC FILTER RING, Model CIE Cos-112
Spectral Response:
Refer Figure 1 and Section 7.
Angular Response:
Illuminance measurements
Accurately cosine corrected to Lambert's Cosine
Law. Maximum error is less than ±3.5% from
true response to 70° from normal incidence,
reference Figure 2.
Filter ring assembly:
Black anodised aluminium alloy ring with
screw thread 1.125" x 20 T.P.I.
Multiple coloured filter glasses individually
selected for close matching to V
λ.
.
Specially profiled acrylic diffuser for high
accuracy cosine angular response.
FIELD OF VIEW PROBE CIE FOV-112
Spectral Response:
Refer Figure 1 and Section 7.
Angular Response:
Luminance
measurements (model L203 only)
The field of view is defined with FOV1 accessory
to 6° full angle.
FOV probe assembly: Black anodised aluminium alloy body with
screw thread 1.125" x 20 T.P.I.
Glass lens f/l 100mm, 25mm
φ
.