DETAILS
NBP640nm narrow bandpass filter
640nm visible narrow band filter is one of the optical application schemes of laser ranging filter. Compared with photoelectric rangefinder, laser rangefinder can not only work day and night, but also improve the ranging accuracy due to the characteristics of good monochromaticity and strong directionality of laser and the semiconductor integration of electronic circuits.
| Item | Parameters |
| Product name | NBP640nm narrow bandpass filter |
| Model number | NBP640nm |
| Description | High Reflection Filters |
| Process | IAD Hard Coating |
| Centralwavelength(CWL) | 340±5nm |
| FWHM | 10±3nm |
| Transmittance | T＞60%@340±5nm |
| Cut off rate: | OD4 200-1100nm |
| Raw material | B270 or Corning gorilla glass or other optical glass |
| Surface quality(S/D) | 60/40 or better |
| Dimension/Round Size | D12x6mm D15x5mm |
| Dimension/Square size | 80x80x1mm |
