TechnoOptis BM-5AC Luminance Colorimeter

High sensitivity luminance colorimeter combines high reliability, operability and high speed.

The BM-5AC luminance colorimeter delivers ultra-high sensitivity measurement from 0.00005 to 1,200,000 cd/m² with selectable 3°, 2°, 1°, 0.2°, and 0.1° measurement angles. Featuring 0.05 ms high-speed response in FAST mode, it precisely evaluates luminance, chromaticity, and correlated color temperature for LCD, OLED, automotive displays, and specialty lighting. Built-in analog output (0–4V) supports flicker analysis and oscilloscope integration for advanced optical testing.

Luminance Colorimeter

Model:

BM-5AC

Maker:

TechnoOptis

Download Materials

Catalog DL

Features

￭ 5 steps selectable measurement angle.
– It can measure the object from particle area to wide area without attachment lens.

￭ Built-in analog output, it can be data collect a data with a oscilloscope.

￭ High speed response speed 0.05ms (Max).
– Building up and falling down time of the flicker light can be measured using Oscilloscope.

Principal use

￭ Measurement luminance and chromaticity.
– TV, PC, Tablet, Smart phone display.
– Ultra micro spot for automobile interior panel.
– Fluorescent material, phosphorescence material, special light source.

Specifications

Photo detector	Photomultiplier tube
Optical system	Objective lens : f=80mm F2.5, Eyepiece lens : View field 5°
Spectral sensitivity	Similar to CIE1931 color matching function
Measurement angle	3°/2°/1°/0.2°/0.1° *selectable
Measurement distance	350mm – ∞ (Distance from metallic tip of objective lens)
Measurement range	Auto/Manual 5-range
Function^(*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 Lab, ⊿Eab and±⊿, CIE1976 Luv, ⊿Euvand±⊿
Measurable range^(*2)	0.00005 – 1,200,000 cd/m²
Accuracy in luminance^(*3)	±4% or less
Accuracy in chromaticity	(1) dx,dy : ±0.005 or less ^(3) (2) dx,dy : ±0.008 or less ^(4)
Repeatability in luminance^(*5)	2.0% : 0.005 – 0.025cd/m² 0.8% : 0.025 cd/m² or more
Repeatability in chromaticity^(*6)	0.003
Measurement time^(*7)	Approx. 2sec
Response speed	NORMAL MODE (All Range) : Approx. 30ms FAST MODE : Range-1: Approx. 5ms　　Range-2: Approx. 0.5ms Range-3: Approx. 0.05ms Range-4: Approx. 0.5ms Range-5: Approx. 0.05ms
Analog output	DC 0 – 4V (X2･Y･Z)
Display	Dot-matrix 20 characters x 4rows with backlight
Interface	RS-232C, USB
Power supply	Dedicated AC adapter AC100V-240V, 50/60Hz
Power consumption	Approx. 20W
Use conditions	Temperature : 0-40℃, Humidity : 85% RH or less (No condensation)
Outer dimensions (W×D×H)	154×355×212mm
Weight	3.6kg

(*1)±⊿ : difference of standard value.
(*2)For standard illuminance A.
(*3)For standard illuminance A, Auto Rage.
(*4)For a combination of the standard source A and the next colored glass,when COLOR ADJUSTMENT is applied.
O-55,Y-48,A-73B,IRA-05,T-44,R-61,B-46,V-44,G-54)
(*5)For standard illuminance A, measuring angle 3°, 2σ, Single mode, Auto Range.
(*6)For standard illuminance A, 2σ, Single mode, Auto Range.
(*7)Single measurement mode.

Measurement area (Diameter φ) (mmφ)

Measurement angle	Measurement distance [mm] ^(*)
Measurement angle	350	500	1000	5000	10000
3°	15.0	23.1	49.2	255	510
2°	10.0	15.4	32.8	169	341
1°	5.0	7.7	16.4	85	170
0.2°	1.0	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
3°	0.00005-0.15	0.0005-1.5	0.005-15	0.05-150	0.5-1,500
2°	0.0001-0.3	0.001-3	0.01-30	0.1-300	1-3,000
1°	0.0004-1.2	0.004-12	0.04-120	0.4-1,200	4-12,000
0.2°	0.01-30	0.1-300	0.4-1,200	10-30,000	100-300,000
0.1°	0.04-120	0.4-1,200	4-120,00	100-300,000	400-1,200,000

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