luminance measuring imaging photometer
LMKシステムに高品質のデジタルカメラを使用すると、測定用コンピュータに頼ることなく、輝度画像を簡単かつ迅速に取り込むことができます。画像を評価するためにLMK LabSoftソフトウェアの全機能も利用可能です。
Technical data
Sensor
CMOS Canon APS-C imaging sensor
5184(H) x 3456(V)
2592(H) x 1728(V)
effective pixel (resolution of the luminance image)
14 Bit RAW data with Bayer structure, uncompressed
Dynamic range:
Single picture measurement (SinglePic)
[ 1:4000 (~60 dB) ]
High Dynamic measurement (AEB)
[ 1:32000 (1/1250 sec. < ti < 8 sec.) ]
Data interface:
USB 2.0 and/or SD/SDHC memory card
Focal Length / Visual field angle:
• Focal length 17mm: 65°(H) x 45°(V)
• Focal length 50mm: 28°(H) x 19°(V)
Selection of measuring range
Selecting aperture, exposure time and ISO speed
Metrological specification
Spectral matching
Numerical weighting of the RGB tristimulus values (multiplying matrices)
Calibration uncertainty
∆L [ 2.5% ]
Uniformity
∆L [ < 2% ]
Restrictions
- Can not be used for measuring coloured light sources (i.e. LED)
- Limited use for measuring modulated light source with a high depth of modulation
Result data
- luminance distributions in measuring images L(x,y)
- statistical data for being used in calculation programs (z.B. EXCEL®, MatLAB®, LabVIEW®)
