Model

Luminance Meter LS-100

Luminance Meter LS-110

Type

SLR spot luminance meter for measuring light-source and surface brightness

Acceptance angle

1°

1/3°

Optical system

85mm f/2.8 lens; SLR viewing system; flare factor less than 1.5%

Angle of view

9°

Focusing distance

1014mm (40 in.) to infinity

Minimum measuring area

Ø 14.4 mm

Ø 4.8 mm

Receptor

Silicon photocell

Relative Spectral Response*

Within 8% (f1´) of the CIE spectral luminous efficiency V (λ)

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/m² or fL (switchable)

Measuring range

FAST: 0.001 to 299,900 cd/m² (0.001 to 87,530fL)
SLOW: 0.001 to 49,990 cd/m² (0.001 to 14,590fL)

FAST: 0.01 to 999,900 cd/m² (0.01 to 291,800fL)
SLOW: 0.01 to 499,900 cd/m² (0.01 to 145,900fL)

Accuracy

0.001 to 0.999 cd/m² (or fL): ±2% ±2 digits of displayed value
1.000 cd/m² (or fL) or greater: ±2% ±1 digit of displayed value

0.01 to 9.99 cd/m² (or fL): ±2% ±2 digits of displayed value
10.00 cd/m² (or fL) or greater: ±2% ±1 digit of displayed value

(Illuminant A measured at ambient temperature of 20 to 30°C/68 to 86°F)

Repeatability

0.001 to 0.999 cd/m² (or fL): ±0.2% ±2 digits of displayed value
1.000 cd/m² (or fL) or greater: ±0.2% ±1 digit of displayed value

0.01 to 9.99 cd/m² (or fL): ±0.2% ±2 digits of displayed value
10.00 cd/m² (or fL) or greater: ±0.2% ±1 digit of displayed value

(Measurement subject: Illuminant A)

Temperature/humidity drift

Within ±3% ±1 digit (of value displayed at 20°C/68°F) within operatingtemperature /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: 4800bps

External control

Measurement process can be started by external device connected to data output terminal

Power source

One 9V battery

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

79×208×150 mm (3-1/8×8-3/16×5-7/8 in.)

Weight

850 g (30 oz.) without battery

Standard accessories

Lens cap; Eyepiece cap; ND eyepiece filter; 9V battery; Case