The leading company for optical measurement

  • CCFL Backlight
  • Exterior lighting
  • Head/Rear Light
  • LCD Backlight
  • LCD Film
  • LCD Module
  • LED Lighting
  • OLED Lighting
  • Special Lighting

Luminance Colorimeter BM-7AC

It was realized in about 0.5 seconds quantitative evaluation that is for luminance, chromaticity, correlated color temperature, etc.
in mass production line.

Outline

It is the latest model of the long-selling product BM-7 series which we are used as a standard measuring instrument for luminance/chromaticity measurement of FPD (Flat Panel Display) and various light source lamp.
This product archives high chromaticity accuracy and high speed, and it is suitable for brightness management of light source, in-line measurement and so on in the light source color measurement field.
Moreover, it provides more stable measurement by direct color correction function from other instruments made by our company.

Features

■ High-speed (0.5sec) measurement and high accuracy (±2%) measurement.
■ It is easy to adjust the instrumental error with two compensates function.
■ Available in analog voltage output (option) named BM-7AS-ANA for measuring response.
It can collect a data by connecting with Oscilloscope.

Principal use

■ Optical property evaluation for flat panel displays, luminance / chromaticity / color temperature measurement for lamps and other light sources.

Specifications

Photo detector 3-element Silicon photodiode
Optical system Objective lens : f=80mm F2.5, Eyepiece lens : View field 5°
Spectral sensitivity Similar to CIE1931 color matching function
Measurement angle 2°/1°/0.2°/0.1° *selectable
Measurement distance 350mm – ∞ (distance from metallic tip of objective lens)
Measurement range Auto/Manual 5-range
Measurement(*1) x,y,L (x,y: chromatic coordinate, L:luminance) and ±⊿
u’, v’, L (u’, v’: chromatic coordinate, L:luminance) and ±⊿
X,Y,Z (X,Y,Z: Tristimulus value) and ±⊿
Tc, duv, L (Tc: Correlated color temperature and Deviation) and±⊿
CIE1976 L*a*b*, ⊿Eab* and±⊿, CIE1976 L*u*v*, ⊿Euv*and⊿
Range of luminance(*2) 0.01~12,000,000 cd/m²
Luminance range for
guaranteed accuracy(*2)
 2°: 1~30,000cd/ m²
1°: 4~120,000cd/ m²
0.2°: 100~3,000,000cd/ m²
0.1°: 400~12,000,000cd/ m²
Accuracy in luminance(*3) ±4% : 1~5 cd/m²

±2% : 5 cd/m² or more

Accuracy in chromaticity dx、dy : ±0.002 (*4)
Repeatability in
luminance
(*5)
1.0% : 1~5cd/m²

0.5% : 5 cd/m² or more

Repeatability in
chromaticity(x,y)(*5)
0.005: 1~5cd/m²

0.002: 5 cd/m²~

Measurement time Approx. 0.5sec
Analog output (Option) Analog voltage output : DC 0 – 3V (X2・Y・Z)
Response time (FAST) :
Range 1: Approx. 30ms, Range 2: Approx. 30ms
Range 3: Approx. 30ms, Range 4: Approx. 0.3ms
Range 5: Approx. 0.3ms
Display Dot-matrix 20caracters x 4rows with backlight
Interface RS-232C, USB
Power supply Dedicated AC adapter AC100-240V, 50/60Hz
Power consumption Approx. 2.5W
Use conditions Temperature 0 – +40℃,Humidity:85% RH or less (No condensation)
Outer dimensions (W×D×H) 120×325×162mm
Weight 3.0kg

(*1)±⊿ : difference of standard value.
(*2)Standard illuminance A.
(*3)Standard illuminance A, Auto Rage, measuring angle 2°.
(*4)Standard illuminance A, 10cd/m² or more.
(*5)Standard illuminance A, Auto Rage, measuring angle 2°, 2σ, SLOW mode.

Measurement area (Diameter mmφ)

Measurement
angle
Measurement distance [mm] (*)
350 500 1000 5000 10000
10 15.4 32.8 169 341
5 7.7 16.4 85 170
0.2° 1 1.5 3.3 17 34
0.1° 0.5 0.8 1.6 8 17

(*)The measurement distance is the distance from the tip of the metal fixture on the instrument of the objective lens.

Display Luminance Range(cd/ m²)

Measurement
angle
Range 1 Range 2 Range 3 Range 4 Range 5
0.01~30 0.03~90 0.1~300 1~3000 10~30,000
0.04~120 0.12~360 0.4~1,200 4~12,000 40~120,000
0.2° 1~3,000 3~9,000 10~30,000 100~300,000 1,000~3,000,000
0.1° 4~12,000 12~36,000 40~120,000 400~1,200,000 4,000~12,000,000

Accessories

■ Attachment Lens: AL-6
■ Attachment Lens: AL-11
■ Attachment Lens: AL-12
■ Reference White Board : WS-3
■ CCD Adapter: IA-2
■ Fiber probe: FP-3P
■ Tripod 5N: Tripod5N
■ Tripod: Tripod-SR
■ Fine Control Table: S-4
■ Mesh Filter: MF-10 / MF-100
■ Carrying Case: TR-2

* Measurement area with attachment lens(mmφ)

Measurement angle Lens type (Measurement distance)
AL-6 (43~57mm) AL-11 (20.4~24.8mm) AL-12 (165~197mm)
1.98~2.75 1.22~1.49 3.11~3.97
0.99~1.37 0.61~0.74 1.56~1.99
0.2° 0.20~0.27 0.12~0.15 0.31~0.40
0.1° 0.10~0.13 0.06~0.07 0.16~0.20
75-1, Hasunuma-cho, Itabashi-ku, Tokyo, 174-8580, Japan
TEL: +81-3-3558-2642, FAX: +81-3-5392-4992
Page Top