Color luminance meter BM-7A

Color luminance meter (Japan Topcon) Model: BM-7A Instrument: Features: filter mode, the original model BM-7 version upgrade, improve the measurement accuracy and measurement speed to achieve a higher speed. Main purposes: widely used color brightness uniformity test backlight module. You can also test the brightness, color, color temperature and other characteristics of the light source. Technical parameters: the optical system of the objective lens: focal length f = 80mm, F2.5 / eyepiece: observation field 5 °, field of view angle adjustment range ± 5diopter measured 2 ° / 1 ° / 0.2 ° / 0.1 ° switchable measuring distance 350mm ~ ∞ ( ) measured from the front end of the objective lens from the contents x, y, L (x, y: the chromaticity coordinates, L: brightness) ± Δ; u, v, L (u, v ?: chromaticity coordinates, L: brightness)??? ± Δ; X, Y, Z (tristimulus values) ± Δ; Tc, duv, L (Tc: color temperature, duv: color difference) ± (measuring angle 2 °) Δ measurement range 0.01 ~ 30,000cd / m2 0.04 ~ 120,000cd / m2 (measured when the angle 1 °) (measuring angle 0.2 °) 1 ~ 3,000,000cd / m2 (measurement angle 0.1 °) 4 ~ 12,000,000cd / m2 brightness measurement accuracy Accuracy: ± less than 2% (5cd / m2 above measurement angle 2 °, A light) color accuracy: ± within 0.002 (10cd / m2 or more, the standard light source A) regardless of the measurement time FAST or SLOW mode in about 0.5 seconds Interface USB1.1 or RS-232C mode power dedicated AC Power adapter Dimensions approximately 325mm (length) x120mm (width) x162mm (H) Weight about 3kg (host only)