LS-150 Luminance Meter


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LS-150 Luminance Meter

The LS-150 Luminance Meter (successor to the LS-100) is a highly accurate luminance meter that uses a newly designed sensor with a spectral response that more closely matches the V(λ) spectral luminous efficiency function of the human eye to provide measurement results that correlate well with visual evaluation. The LS-150 is compact, ergonomic, and extremely portable running off AA batteries.

The LS-150 series uses a single lens reflex (SLR) optics system that provides users with several important capabilities. The SLR allows highly accurate targeting of light sources. Very small areas, even down to 1.3mm (when close-lens is used), can be measured accurately. Measurement areas at distances both long and short show up consistently in the viewfinder. This flexibility allows even those who have never used the instrument to gather precise measurement results.

The value of the measured luminance is easy to read on the clear backlit LCD screen and also on the bright viewfinder. With this capability, the instrument allows the user to never have to move the instrument from the eye while still perfectly controlling the measured object. The automatic mode sets the measurement time according to the brightness of the target. When measuring light sources that are particularly bright a neutral density eyepiece filter makes the job safe and comfortable. In all measuring tasks, our uniquely designed pistol-type grip provides for a secure hold on the instrument.

When measuring low luminance, the LS-150 comes through with a range that begins at 0.001cd/m². Color-correction and calibration functions built into the instrument give users the ability to choose a standard luminance and have differences corrected according to any light sources that are specified. The LS-150 included utility software allows the instrument to be controlled from a PC via USB 2.0. Repeated interval measurements can be conducted a specific number of times at specific intervals, measurement data can be displayed on graphs or lists, and data can be exported to spreadsheet applications. Optional close-up lenses allows for measurement of extremely small areas. Also, the optional illuminance adapter enables illuminance measurement as well.

Features

  • Eligible ISO 17025 Certification
  • 1° acceptance angle
  • Portable, lightweight, compact and battery powered
  • Upper range of the DIN quality class B
  • SLR (Single Lens Reflex), precise targeting; shows exact area to measure
  • Backlit LCD and viewfinder displays; easy to focus on target
  • Neutral density eyepiece filter allowing measurements of bright light sources
  • Pistol grip enables user to stabilize the instrument with ease
  • Measures low luminance, range starts at 0.001cd/m2
  • User calibration and color correction
  • Includes Utility Software allows the instrument to be controlled from the PC via USB 2.0
  • Optional CCD camera adapter enables viewfinder to be monitored from a distance

Specifications

ModelLS-150 Luminance Meter
Measuring angle
Optical systemSLR viewing system, f = 85 mm F2.8
Angle of view9° (with diopter adjustment)
Relative spectral responsivityClosely matches spectral luminous efficiency (V (Λ))
Application standardDIN 5032-7 Class
B compliant
Minimum measuring area (diameter)14.4 mm
(1.3 mm when close-up lens is used)
Minimum measuring distance (From the measuring distance reference plane)1,012 mm
(213 mm when close-up lens is used)
Measurement modeInstantaneous value, maximum/minimum value, luminance difference (Δ)/luminance ratio (%)
Measurement timeAUTO: 0.7 to 4.3 seconds
Manual: 0.7 to 7.1 seconds
Luminance unitcd/m2 or fL
Luminance range0.001 to 999,900 cd/m2
Accuracy*1+/-2% +/- 2 digits
(1 cd/m2 or less)
+/-2% +/- 1 digit
(1 cd/m2 or more)
Repeatability*10.2% + 1 digit
Calibration standardKonica Minolta standard/user-specified standard switchable
User calibration channels10 channels
Data memory1,000 data
External display
(Number of significant digits)
(Luminance) 4 digits
(Chromaticity) 4 digits
Internal display
(Number of significant digits)
(Luminance) 4 digits
InterfaceUSB 2.0
PowerAA-size batteries (x2), USB bus power, or optional AC adapter
Current consumptionWhen viewfinder display is lit: 70 mA average
Operation temperature/humidity range0 to 40°C, relative humidity of 85% or less (at 35°C)
Storage temperature/humidity range0 to 45°C, relative humidity of 85% or less (at 35°C)
Size71x214x154 mm
Weight850 g (without batteries)
Standard accessoriesLens Cap
Eyepiece ND Filter
Eyepiece Cap
AA-size batteries (x2)
Hard Case CS-A12
Wrist Strap CS-A13
USB Cable T-A15
Data Management Software CS-S20
Optimal accessoriesClose-Up Lens No. 153/135/122/110
CCD Camera Adapter CS-A14
Illuminance Adapter CS-A15
AC Adapter AC-A305J/L/M
Specifications are subject to change without notice.
*1 Standard Illuminant A; Standard measurement distance; Measurement time setting: Auto

Included Accessories

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Data Management Software
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Strap CS-A13
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USB Cable T-A15
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