LMK5 カラーシリーズ

lmk5-color-1b
color measuring video photometer

The LMK 5 color is equipped with a glas filter wheel for color and chromaticity measurements, adapted to the CIE color matching functions of the 2° standard observer (CIE 1931). Thus, luminances and color coordinates can be measured in a spatially resolved way.

In addition, the measuring system can also be equipped with glas filters for the scotopic luminance V´(λ), the circadian action function C(λ), an IR-filter (measurements in the NIR range of 780 – 1000 nm), a BLH (blue light hazard), or a clear glass filter.

Technical data

Sensor – CCD – imaging sensor matrix system

Standard resolution

1380 x 1030 Pixel
Sony-CCD [ ICX 285 AL (2/3″); 14 Bit digital, progressive scan ]

High resolution

2448 x 2050 Pixel
Sony-CCD [ ICX 655 AL (2/3″); 14 Bit digital, progressive scan ]

Measurement time:

starting with 1 sec. up to 15 sec. depending on luminance level, adjusted lens and exposure / integration time
Dynamic range:

Color High Dynamic measurement
[ 1:10000000 (~140 dB) ]

Data interface:

Gigabit Ethernet Interface(GigE®)

Spectral matching:

  • with full size glas filter matched to V(λ)-function for measuring luminances
  • arranged with full size glas X(λ)-, V(λ)- and Z(λ)-filter for measuring colour values
  • additionally full size glas C(λ)-, V´(λ)-, BLH (blue light hazard) and IR-filter are available

Metrological data

Metrological specifications

V(λ) [ f´1 < 3.5%1]; X(λ) [ f*1 < 4% ]
Z(λ) [ f*1 < 6% ]; V´(λ) [ f*1 < 6% ]

Measuring quantities

Luminance

L (cd/m²)

Chromaticity coordinates

x,y

Supported colour spaces

RGB, XYZ, sRGB, EBU-RGB, User, Lxy,
Luv, Lu’v’, L*u*v*, C*h*s*uv, L*a*b*,
C*h*ab, HIS, HSV, HSL,WST2

Measuring range (integration time)

100 µs…15 s

Accuracy rating depending on lens (aperture number = F), i. e.:

1ms … appr. 7500 cd/m² & 3 s … appr. 2.5 cd/m² (F = min.)
1ms … appr. 60000 cd/m² & 3 s … appr. 20 cd/m² (F = max.)

Calibration uncertainty3

fix focused lenses ∆L [ < 2% ]
focusable lenses ∆L [ < 2.5% ]

Repeatability4

∆L [ < 0.1% ]
∆x,y [ < 0,0001 ]

Measuring accuracy

∆L [ < 3% (for standard illuminant A) ]
∆x,y [ < 0.0020 (for standard illuminant A) ]
∆x,y [ < 0.0100 (set of test colours)4 ]

Uniformity

∆L [ < 2% ]

Advantages

  • complex evaluation of luminous and illuminated scenes by means of the photograph of an image-resolved luminance distribution
  • simultaneous recording of a big number of connected measuring data easy data analysis (at a glance)

Result data

  • luminance distributions in measuring images L(x,y)
  • derived lighting-engineering parameters such as illuminance distribution E(x,y) and luminous intensity distribution I(x,y)
  • statistical data for being used in calculation programs (z.B. EXCEL®, MatLAB®, LabVIEW®)

1 Measurements according to DIN 5032 Part 6/CIE Pub. 69 | 2 Dominant wavelength, saturation, correlated color temperature | 3 Calibration according to DIN 5032 Part 6 using a luminance standard led back from the Physical-Technical Federal Institute | 4 Measurement performed on a stabilized white LED light source L=100cd/m². Mean value over 100 Pixel; repeatability as variability of the mean value.

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