LS-150 Luminance Meter

2017-10-20 Click:362

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

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

Model	LS-150 Luminance Meter
Measuring angle	1°
Optical system	SLR viewing system, f = 85 mm F2.8
Angle of view	9° (with diopter adjustment)
Relative spectral responsivity	Closely matches spectral luminous efficiency (V (Λ))
Application standard	DIN 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 mode	Instantaneous value, maximum/minimum value, luminance difference (Δ)/luminance ratio (%)
Measurement time	AUTO: 0.7 to 4.3 seconds Manual: 0.7 to 7.1 seconds
Luminance unit	cd/m2 or fL
Luminance range	0.001 to 999,900 cd/m2
Accuracy*1	+/-2% +/- 2 digits (1 cd/m2 or less) +/-2% +/- 1 digit (1 cd/m2 or more)
Repeatability*1	0.2% + 1 digit
Calibration standard	日本 standard/user-specified standard switchable
User calibration channels	10 channels
Data memory	1,000 data
External display (Number of significant digits)	(Luminance) 4 digits (Chromaticity) 4 digits
Internal display (Number of significant digits)	(Luminance) 4 digits
Interface	USB 2.0
Power	AA-size batteries (x2), USB bus power, or optional AC adapter
Current consumption	When viewfinder display is lit: 70 mA average
Operation temperature/humidity range	0 to 40°C, relative humidity of 85% or less (at 35°C)
Storage temperature/humidity range	0 to 45°C, relative humidity of 85% or less (at 35°C)
Size	71x214x154 mm
Weight	850 g (without batteries)
Standard accessories	Lens 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 accessories	Close-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

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