AUTOELREPHO®
Specification
ISO-standardization
AUTOELREPHO® conforms to ISO standards
Determination of color
The determination of color is accomplished according to the CIE Colorimetry Publication No. 15.2. (1986) Vienna
Optical design
- Measuring geometry d/0°
- Diameter of the integrating sphere 150 mm
- Viewing aperture Ø 34 mm
- Effective measurement area Ø 30 mm
- Dual-beam optimized optical design
- Ø 32 mm achromatic lens system
Specular factor
Excluded or included
Light sources
- AUTOELREPHO® Combined Multisource
- Continuous lighting
- Simulated CIE illuminants C and D65 etc.
- Indoor lighting with adjustable UV-content (optional)
- Triplet-free illumination
- Sphere error eliminated, thus reliable detection of:
- Total reflectance factor with UV
- Reflectance factor without UV
(= Base chromaticity ; Grundweisse) - Fluorescence component WF
- Whiteness W and tint TW
Calibration
- 16 different calibration scales
- White and black calibration with neutral standards
- Multicalibration, neutral and/or color standards in same photometric scale
- Spectral calibration, up to 15 calibration standards in same photometric scale
- Fluorescence calibration with direct entry of numerical calibration values
- Automatic calibration capability
UV - control
Measurement and adjustment of the UV content in the integrating sphere by automatic adjustable, numerical constant UV-generator
UV - cut-off
UV totally eliminated, or one of: 380 nm, 400 nm, 420 nm, 435 nm,
455 nm, 460 nm
Colorimetric functions
- Observation angles: 2° and 10°
- ISO - brightness (R457 nm)
- Calculated TAPPI-brightness (R457 nm)
- D65 - brightness (R457 nm), (UV-off, R457 nm)
- Reflectance factors Rx, Ry, Rz
- CIE Tristimulus values X, Y, Z. Ratios X / X0, Y / Y0, Z / Z0
- CIE Dominant wavelength λD (380-780 nm incl. purple area)
- CIE Excitation purity Pe%
- CIE 1931 and 1964 chromaticity coordinates x,y
- Y-value (luminance)
- CIE L*a*b* color coordinates
- CIE L*a*b* color differences ΔL*, Δa*, Δb*, ΔE*
- CIE Whiteness W. CIE Tint TW
- CIE Whiteness W10. CIE Tint TW10
- Δ CIE - Whiteness (WhitenessD65 – WhitenessUV-off)
- Δ Fluorescence - R457 (R457D65 - R457UV-off)
- Residual fluorescence
- Yellowness
- ISO - opacity
- Transparency
- Light scattering coefficient, s
- Light absorption coefficient, k
- K & N - test
- Density
- Metamerism index
- CMC Color difference
MEASUREMENT MODES
1. ISO Brightness measurement mode
- Filter function R457 nm, 44 nm HBW
2. CIE tristimulus X,Y,Z measurement mode
3. Fluorescence mode (option)
- Total reflectance factor with UV (C, D65 etc.)
- Reflectance factor without UV (C, D65 etc.)
- Fluorescence component WF
4. Spectral measurement mode (option)
- Spectral data 380 nm – 700 nm
- Optional 360 nm – 700 nm
- Numerical and graphic spectral reflectance data
5. Residual ink 950 nm mode (option)
- (Determination of effective residual ink concentration = ERIC
by infrared reflectance measurement)
6. Light fastness test (option)
- Adjustable timing 5 min – 24 hrs
- Adjustable UV content in the integrating sphere
Measurement range
- Photometric range 0.000 to 500.000 % R
- Dynamic range from +2 500 000 units to -2 500 000 units
Reproducibility
- Short time reproducibility 0.001 % R
- Long term stability 0.01 % R/24 h
Accuracy of reading
- Reflectance factors 0.001 % R
- Dominant wavelength 0.01 nm
- Excitation purity 0.01 Pe%
- Chromaticity coordinates x,y < 0.0001
- CIE L*a*b* color coordinates 0.001
Measurement time
Adjustable measurement time, from 10 ms to 2.5 s / reflectance factor.
Measurement principle
- Optical integrating system
- Continuous lighting with AUTOELREPHO® Combined Multisource
- Latest filter technology
Enables determination of up to 100·109 different colors, meaning ultra high precision in detection of very small color differences and in low level detection, for example measurement of dominant wavelength of perfect diffuser; reflectance values near 100 % R or of black velvet; reflectance values near zero.
OPTIONS
1. CIE Colorimetric calculator (software package)
- Manual entry of values
- Calculates from full spectral data, according to 1 nm, 5 nm, 10 nm or
20 nm tables for example:- CIE Tristimulus functions X,Y,Z
- CIE 1931 and 1964 chromaticity coordinates x, y
- Reflectance factors Rx, Ry, Rz
- CIE Dominant wavelength λD (380-780 nm incl. Purple =
negative wavelength area) - CIE Excitation purity Pe%
- CIE Whiteness W. CIE Tint TW
- CIE Whiteness W10. CIE Tint TW10
- CIE L*a*b* color coordinates
- ISO brightness function 457 nm
- Cross-calculation possibility between all above mentioned parameters
- Useful, accurate calibration and measurement data cross-checking tool
2. Reference-reflectometer
Absolute reference-reflectometer equipment
(Ultra precision mode 0.0001 % R, all wavelengths)
3. AUTOELREPHO built-in optical memory
Equipment for self-testing of photometric linearity, realized up to over 500 % R,
all wavelengths, using superposition light adding and subtracting method
by Alfred Reule.
4. Self diagnostics
Enhanced self diagnostics capability for checking of contamination, dust etc.
5. On-line sensor integration
Provides reliable high-accuracy calibration values to e.g. paper machine on-line sensors
6. Remote access control
Remote access connection with modem and diagnostics software package for control and testing of AUTOELREPHO®-equipment via modem
7. Special software packages for product control
- Graphical CIE 1931 and 1964 Chromaticity Diagram presentation
- Graphical CIE L*a*b* Color Space presentation
- Reference product register for targets
- Global Color Navigation System
- Extended Markup Language (XML) etc. data transfer capabilities
Equipment includes
Main unit, color monitor, printer and keyboard
Computer
- Built-in computer
- Hard disk selectable
- Connections to mill systems: RS232, Ethernet etc.
Dimensions (main unit; width x height x depth)
360 mm x 450 mm x 516 mm
Weight (main unit)
ca. 35 kg
Ambient conditions
- Temperature 18 - 30 °C
- Relative humidity 40 - 60%, no condensation
Operating voltage
- 90 - 130 VAC; 50 - 60 Hz
- 200 - 260 V AC; 50 - 60 Hz