Konica Minolta ILLUMINANCE METER LUMINANCE METER CHROMA METER T-10A /T-10MA/ T-10WSA/T-10WLA - Manual (Page 8)

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Compact, lightweight, easy-to-use SLR luminance
meters with a wide measuring range
LS-100
Main Features
Flareless SLR optical system for accurate
measurements
The SLR (single-lens-reflex) optical system allows precise aiming
and ensures that the viewfinder shows the exact area to be
measured. The optical system is also virtually flareless, eliminating
the influence of light from outside the measurement area.
Narrow acceptance angle for measurements
of small specimens
Acceptance angles of only 1° for LS-100 and 1/3° for LS-
110 allow accurate measurements of small specimen areas.
In addition, optional close-up lenses can be used to measure
areas as small as ø1.3 mm when using LS-100 and ø0.4
mm when using LS-110.
User calibration and color-correction
functions
To increase the versatility of the LS-100 and LS-110,
both models are equipped with user calibration and color
correction functions. The user calibration function allows the
meter to be calibrated to a user-selected standard instead
of the preset Konica Minolta standard; this function can also
be used to standardize the response of several meters. The
color correction function allows the response of the meter to
be adjusted when measuring colored specimens.
Luminance ratio and peak luminance
measurements
In addition to measurements of the present luminance, the LS-
100 and LS-110 can also determine the percent ratio of the
measured luminance to a luminance value stored in memory
as well as the peak luminance or luminance ratio measured.
RS-232C data communication
Use of the built-in RS-232C interface allows the meter to be
connected to a personal computer.
Lightweight, compact design powered by a
single 9V battery for portability
Luminance Meter LS-100
1° acceptance angle,
Measuring range: 0.001 to 299,900 cd/m 2
(0.001 to 87,530 fL)
Luminance Meter LS-110
1/3° acceptance angle,
Measuring range: 0.01 to 999,900 cd/m 2
(0.01 to 291,800 fL)
Relative Spectral Response
Reduction of Flare
Ideally, the relative spectral responsivity of the luminance meter
should match V (λ) of the human eye for photopic vision.
As shown in the graph above, the relative spectral
responsivity of Konica Minolta Luminance Meters LS-100/
LS-110 is close to the CIE spectral luminous efficiency V (λ).
CIE ; Commission Internationale de I«Eclairage
f 1 ’(CIE«s symbol) ; The degree to which the relative spectral responsivity
matches V (λ) is characterized by means of the error f 1 ’.
The degree to which the influence of light from outside
the defined measuring area is eliminated is an important
factor in the performance of luminance meters. In Konica
Minolta Luminance Meters, the flare factor is kept to below
1.5%, even if an object with
extremely high luminance
is just outside the meter’s
measuring area.
The graph at right shows the
effect when a bright point
is moved from A inside the
measuring area to B just
outside the measuring area.
If the measured value at
A is defined at 100%, the
measured value at B would be
less than 0.1%.
100%
10%
1%
0.1%
30 ' 15 ' 0 15 ' 30 '
A B
Angle of
acceptance
in minutes
1°(1/3°) measuring spot
Relative sensitivity
(10 ) ' (5 ) ' (5 ) ' (10 ) '
750 700 650 600 550 500 450 400
0
10
20
30
40
50
60
70
80
90
100
Relative sensitivity (%)
Wavelength (nm)
Konica Minolta Luminance
Meters LS100/LS-110
The spectral
luminous efficiency (λ)
Angle Finder V N allows the
measuring area and
measurement display inside the
viewfinder to be seen at an angle
of 90° to the normal viewfinder
optical axis. Angle Finder V N can
also be focused and the
magnification can be set to 1x or
2x.
⿎
Specifications
Model Luminance Meter LS-100 Luminance Meter LS-110
Type SLR spot luminance meter for measuring light-source and surface brightness
Measuring angle 1° 1/3°
Optical system 85 mm f/2.8 lens; SLR viewing system; flare factor less than 1.5%
Angle of view 9°
Focusing distance 1014 mm (40 in.) to infinity
Minimum measuring area ø14.4 mm ø4.8 mm
Receptor Silicon photocell
Response time FAST: Sampling time: 0.1s, time to display: 0.8 to 1.0s; SLOW: Sampling time: 0.4s, time to display: 1.4 to 1.6s
Luminance units cd/m 2 or fL (switchable)
Measuring range FAST : 0.001 to 299,900 cd/m 2 (0.001 to 87,530fL)
SLOW : 0.001 to 49,990 cd/m 2 (0.001 to 14,590fL)
FAST : 0.01 to 999,900 cd/m 2 (0.01 to 291,800 fL)
SLOW : 0.01 to 499,900 cd/m 2 (0.01 to 145,900 fL)
Accuracy* 1 0.001 to 0.999 cd/m 2 (or fL): ±2% ±2 digits of displayed value
1.000 cd/m 2 (or fL) or greater: ±2% ±1 digit of displayed value
0.01 to 9.99 cd/m 2 (or fL): ±2% ±2 digits of displayed value
10.00 cd/m 2 (or fL) or greater: ±2% ±1 digit of displayed value
Repeatability* 2 0.001 to 0.999 cd/m 2 (or fL): ±0.2% ±2 digits of displayed value
1.000 cd/m 2 (or fL) or greater: ±0.2% ±1 digit of displayed value
0.01 to 9.99 cd/m 2 (or fL): ±0.2% ±2 digits of displayed value
10.00 cd/m 2 (or fL) or greater: ±0.2% ±1 digit of displayed value
Temperature/humidity drift Within ±3% ±1 digit (of value displayed at 20°C/68°F) within operating temperature/humidity range
Calibration mode Minolta standard/user-selected standard (switchable)
Color correction factor Set by numerical input; range: 0.001 to 9.999
Reference luminance 1; set by measurement or numerical input
Measurement modes Luminance; luminance ratio; peak luminance or luminance ratio
Display External: 4-digit LCD with additional indications
Viewfinder: 4-digit LCD with LED backlight
Data communication RS-232C; baud rate: 4800 bps
External control Measurement process can be started by external device connected to data output terminal
Power source One 9 V battery; power can also be supplied by optional Data Printer DP-10
Power consumption While measuring button is pressed and viewfinder display is lit: 16 mA average
While power is on and viewfinder display is not lit: 6 mA average
Operating temperature/humidity range 0 to 40°C, relative humidity 85% or less (at 35°C) with no condensation
Storage temperature /humidity range -20 to 55°C, relative humidity 85% or less (at 35°C) with no condensation
Dimensions 79x208x150 mm (3-1/8x8-3/16x5-7/8 in.)
Weight 850 g (30 oz.) without battery
Standard accessories Lens cap; Eyepiece cap; ND eyepiece filter; 9 V battery; Case
* 1 Standard Illuminant A measured at ambient temperature of 20 to 30ºC
* 2 Standard Illuminant A
Optional Accessories
⿎
System diagram (Optional Accessories)
Close-Up Lenses
No. 153
No. 135
No. 122
No. 110
Angle Finder V N
PC
Connecting Cable
LS-A11 (for data output)
Connecting Cable
LS-A12
(for data communication)
Minimum measuring area
Close-Up
Lenses
With
LS-100
With
LS-110
No.153 ø8.0 mm ø2.7 mm
No.135 ø5.2 mm ø1.8 mm
No.122 ø3.2 mm ø1.1 mm
No.110 ø1.3 mm ø0.4 mm
(Theoretical values)
Close-Up Lenses
Angle Finder V N
Luminance Meters
LS-100/LS-110
Luminance Meters LS-100/LS-110 Luminance Meters LS-100/LS-110