The new BM-7AS replaces the BM-7A and provides higher accuracy color filters for improved chromaticity measurements.
A step up from the BM-9A (luminance only), the BM-7AS is faster and can measure both luminance and color with greater precision. Two macro lens options allow for measurement of very small objects or light sources down to 0.06 mm (60 um)
The cost-effective BM-7AS is the instrument of choice for factory production lines requiring multiple instruments but is also at home in the R&D lab or Engineering department as a “workhorse” photometer / colorimeter
Fast measurement speed
Supports luminance, chromaticity, and CCT measurements
Luminance accuracy within ±2%
Luminance, Chromaticity, and Color Temperature measurement of LCDs, CRTs, OLEDs, LEDs, etc
Transmittance of LCD polarizing plates & filters
Luminance and color measurement of various light sources
Four selectable apertures
Three photodiode sensors
Three dedicated silicon photodiode sensors provide direct measurement of the CIE tri-stimulus values (X,Y,Z). From these, the calibrated Luminance and Chromaticity coordinates (and other derived data) are computed and displayed on the integral LCD. All measurement data is available via an RS-232C interface if remote control is required.
Step it up to the BM-5AS
If you require lower light measurements (below 0.01 cd/m2), consider the Topcon BM-5AS PMT-based Color Filter Photometer. The BM-5AS is more sensitive than the BM-7AS and uses a tri-stimulus filter wheel and adds a fifth measurement aperture: 3° / 2° / 1° / 0.2° / 0.1°.
|Optical System||Objective lens: f=80mm F2.5
Eyepiece lens: View field 5°, Diopter adjustment range ±5 diopter
|Measurement Distance||350mm – Inf.|
|Luminance Range cd/m2||0.01 ~ 30,000||0.04 ~ 120,000||1 ~ 3,000,000||4 ~ 12,000,000|
|Luminance Accuracy||±4% for Luminance less than 5 cd/m2, ±2% for Luminance greater than 5 cd/m2|
|Color Accuracy||±0.002 in 1931 CIE x,y Space|
|Spot Size at 1m||32.8 mm||16.4 mm||3.3 mm||1.6 mm|
|Min. Spot Size at 35cm||10 mm||5 mm||1 mm||0.5 mm|
|Dimensions||Approx 325mm (L) x 120mm (W) x 162mm (H)|
See the BM-7AS Brochure for available options. Popular options include:
- AL-6 and AL-11 adapter lenses (for reducing the measurement spot)
- Tripod and fine adjustment stand (gimbal)
- Fiber optic probe
- CM-700 application software
If you can’t find what you are looking for, contact us for info on Topcon options and accessories.