Konica Minolta cl200a User Manual

14

15

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.

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.

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.

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.

Use of the built-in RS-232C interface allows the meter to be 

connected to a personal computer.

1° acceptance angle, 

Measuring range: 0.001 to 299,900 cd/m

2

(0.001 to 87,530 fL)

1/3° acceptance angle, 

Measuring range: 0.01 to 999,900 cd/m

2

(0.01 to 291,800 fL)

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.

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

Close-Up Lenses

Angle Finder  V

N

PC

Connecting Cable

(for data output)

Connecting Cable

(for data communication)

Minimum measuring area

Close-Up

Lenses

With

With

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)

Luminance Meters LS-100/LS-110

Luminance Meters LS-100/LS-110