Konica Minolta T-10A /T-10MA/ T-10WSA/T-10WLA LS-100/LS-110, Luminance Meter LS-100, Luminance Meter LS-110, 1° acceptance angle, Measuring range: 0.001 to 299,900 cd/m2 (0.001 to 87,530 fL), LS-100, LS

100%

Luminance Meters

LS-100/LS-110

Compact, lightweight, easy-to-use SLR luminance meters with a wide measuring range

Luminance Meter LS-100

1° acceptance angle,

Measuring range: 0.001 to 299,900 cd/m2 (0.001 to 87,530 fL)

Luminance Meter LS-110

1/3° acceptance angle,
Measuring range: 0.01 to 999,900 cd/m2
(0.01 to 291,800 fL)	LS-100
M a in F e a t u r e s	R e la t iv e S p e c t r a l R e s p o n s e

⿎Model⿎Specifications			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/m2 or fL (switchable)
Measuring range	FAST	: 0.001 to 299,900 cd/m2 (0.001 to 87,530fL)		FAST	: 0.01 to 999,900 cd/m2	(0.01 to 291,800 fL)
	SLOW	: 0.001 to 49,990 cd/m2 (0.001 to 14,590fL)		SLOW	: 0.01 to 499,900 cd/m2	(0.01 to 145,900 fL)
Accuracy*1	0.001 to 0.999 cd/m2 (or fL): ±2% ±2 digits of displayed value			0.01 to 9.99 cd/m2 (or fL): ±2% ±2 digits of displayed value
	1.000 cd/m2		(or fL) or greater: ±2% ±1 digit of displayed value	10.00 cd/m2 (or fL) or greater: ±2% ±1 digit of displayed value
Repeatability*2	0.001 to 0.999 cd/m2 (or fL): ±0.2% ±2 digits of displayed value			0.01 to 9.99 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	10.00 cd/m2 (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.)

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-100and 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-100and ø0.4 mm when using LS-110.

User calibration and color-correction functions

To increase the versatility of the LS-100and 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-110can 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

14Luminance Meters LS-100/LS-110

	100							The spectral
	90							luminous efficiency (λ)
(%)								Konica Minolta Luminance
	80							Meters	LS100/LS-110
sensitivity	70
	60
Relative	50
	30
	40
	20
	10
	0
		400	450	500	550	600	650	700	750

Wavelength (nm)

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-110is close to the CIE spectral luminous efficiency V (λ).

CIE ; Commission Internationale de I«Eclairage

f1’(CIE«s symbol) ; The degree to which the relative spectral responsivity matches V (λ) is characterized by means of the error f1’.

R e d u c t io n o f F la r e

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	sensitivity	10%
measuring area.
The graph at right shows the		1%
effect when a bright point	Relative
is moved from A inside the
		0.1%
measuring area to B just
outside the measuring area.	Angle of
			30' 15' 0 15' 30'
If the measured value at	acceptance		(10') (5')	(5')(10')
	in minutes
A is defined at 100%, the
measured value at B would be			A	B

less than 0.1%. 1°(1/3°) measuring spot

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
⿎⿎System diagram	O p t io n a l A c c e s s o r ie s
	(Optional Accessories)	Close-Up Lenses
			Minimum measuring area
			Close-Up	With	With
			Lenses	LS-100 LS-110
Close-Up Lenses			No.153	ø8.0 mm	ø2.7 mm
		Angle Finder VN	No.135	ø5.2 mm	ø1.8	mm
	No. 153
	No. 135		No.122	ø3.2 mm	ø1.1	mm
	No. 122		No.110	ø1.3 mm	ø0.4 mm
	No. 110		(Theoretical values)
		Angle Finder VN	Angle Finder VN allows the
Connecting Cable			measuring area and
LS-A11(for data output)			measurement display inside the
			viewfinder to be seen at an angle
Connecting Cable			of 90° to the normal viewfinder
			optical axis. Angle Finder VN can
LS-A12
(for data communication)			also be focused and the
PC			magnification can be set to 1x or
			2x.

Luminance Meters LS-100/LS-110 15