Topcon Optical Instrument Comparison
Westar carries a full line of Topcon optical instruments. If you need to measure light, we can help you select which Topcon photometer, colorimeter, spectroradiometer, color video photometer, or response detector is right for your application.
Specifications | SR Series | BM Series | ||||||
---|---|---|---|---|---|---|---|---|
Optical System | SR-LEDH | SR-LEDW SR-LEDW-5N | SR-UL2 SR-UL2s | SR-UL1R | SR-3AR | BM-5AC | BM-7AC | BM-9A |
Objective Lens | f=82mm F2.5 | f=82mm F2.5 | f=80mm F2.5 | f=36mm F2.5 | ||||
Eyepiece Lens | Collimating lens: View field 5° | View field 5°, Diopter adjustment range ±5 diopter | View field 5°, Diopter adjustment range ±5 diopter | View field 5° | ||||
Apertures | 2° / 1° collimation only | 2° / 1° / 0.2°/ 0.1° | 3° / 2° / 1° / 0.2°/ 0.1° | 2° / 1° / 0.2°/ 0.1° | 2° / 1° / 0.2° | |||
Measurement Distance | 350 mm to Inf. | 350 mm to Inf. | 350 mm to Inf. | |||||
Spot Size at 1m | SR-LEDH | SR-LEDW SR-LEDW-5N | SR-UL2 SR-UL2s | SR-UL1R | SR-3AR | BM-5AC | BM-7AC | BM-9A |
2° | 32.2 mm | 32.2 mm | 32.8 mm | 32.3 mm | ||||
1° | 16.1 mm | 16.1 mm | 16.4 mm | 16.2 mm | ||||
0.2° | NA | 3.2 mm | 3.3 mm | 3.23 mm | ||||
0.1° | NA | 1.6 mm | 1.6 mm | NA | ||||
Spot Size at 35cm | SR-LEDH | SR-LEDW SR-LEDW-5N | SR-UL2 SR-UL2s | SR-UL1R | SR-3AR | BM-5AC | BM-7AC | BM-9A |
2° | 10 mm | 10 mm | 10 mm | 9.5 mm | ||||
1° | 5 mm | 5 mm | 5 mm | 4.8 mm | ||||
0.2° | NA | 1 mm | 1 mm | 0.95 mm | ||||
0.1° | NA | 0.5 mm | 0.5 mm | NA | ||||
Luminance Range | SR-LEDH | SR-LEDW SR-LEDW-5N | SR-UL2 SR-UL2s | SR-UL1R | SR-3AR | BM-5AC | BM-7AC | BM-9A |
Min Lv (cd/m2) | 10 | 0.0005 | 0.0005 | 0.001 | 0.1 | 0.00005 | 0.01 | 0.01 |
Max Lv (cd/m2) | 4,500,000 | 5,000,000 | 300,000 | 1,200,000 | 12,000,000 | 28,000,000 | ||
Accuracy | SR-LEDH | SR-LEDW SR-LEDW-5N | SR-UL2 SR-UL2s | SR-UL1R | SR-3AR | BM-5AC | BM-7AC | BM-9A |
Luminance Accuracy | ±2% (for standard illuminant A) | ±4% (for standard illuminant A) | ±4% for L under 5 cd/m2, ±2% for L over 5 cd/m2 | ±2% of reading ±2 digit | ||||
Color Accuracy | ±0.002 in 1931 CIE x,y Space | ±0.005 in 1931 CIE x,y Space | ±0.002 in 1931 CIE x,y Space | NA | ||||
More Info | LEDH | LEDW LEDW-5N | UL2 UL2s | UL1R | 3AR | BM-5AC | BM-7AC | BM-9A |
Link to Product Page | SR-LEDH | SR-LEDW | SR-UL2 | SR-UL1R | SR-3AR | BM-5AC | BM-7AC | BM-9A |