MidOpt Longpass Filters
LP series
Longpass filters are designed to pass a broad spectrum of longer wavelengths while blocking shorter wavelengths. They can also be combined with shortpass filters to create a custom Bandpass filter. The glass is polished on both sides for exceptional parallelism and optical flatness and also has an anti-reflection coating for maximum transmission in VIS and NIR spectrums.
The StablEdge® design reduces the angular dependency and minimises short-shifting effects.
The LP Series is split into the standard LP series with different transmission curves and the LP lens protection series which includes different models with and without anti-reflection coating, UV absorbing, UV blocking filter and a protection window for high transmission and heat resistance.
LP590 Red Longpass Filter: Transmission data
LP470 Light Yellow Longpass Filter: Data Transmission
MidOpt StablEDGE® filter design: superior wavelength control at any angle
Learn more about optical filters in our knowledge base
| Model | Filter type | Filter mounting | Diameter (mm) | Filter thread | Transmittance (wavelength) |
| MIDOPT FIL LP390/25.5 | longpass | mounted | M25.5 x 0.5 | 410 - 1100 | |
| MIDOPT FIL LP390/27 | longpass | mounted | M27 x 0.5 | 410 - 1100 | |
| MIDOPT FIL LP390/28 SLIP | longpass | slip mount | 28 | 410 - 1100 | |
| MIDOPT FIL LP390/35.5 | longpass | mounted | M35.5 x 0.5 | 410 - 1100 | |
| MIDOPT FIL LP390/37.5 | longpass | mounted | M37.5 x 0.5 | 410 - 1100 | |
| MIDOPT FIL LP390/40.5 | longpass | mounted | M40.5 x 0.5 | 410 - 1100 | |
| MIDOPT FIL LP390/43 | longpass | mounted | M43 x 0.75 | 410 - 1100 | |
| MIDOPT FIL LP390/46 | longpass | mounted | M46 x 0.75 | 410 - 1100 | |
| MIDOPT FIL LP390/55 | longpass | mounted | M55 x 0.75 | 410 - 1100 | |
| MIDOPT FIL LP390/67 | longpass | mounted | M67 x 0.75 | 410 - 1100 | |
| MIDOPT FIL LP390/77 GLASS | longpass | unmounted | 77 | 410 - 1100 | |
| MIDOPT FIL LP390/82 | longpass | mounted | M82 x 0.75 | 410 - 1100 | |
| MIDOPT FIL LP390/C-MOUNT | longpass | mounted | C-Mount | 410 - 1100 | |
| MIDOPT FIL LP390/R80X20 | longpass | unmounted | 410 - 1100 | ||
| MIDOPT FIL LP470/30.5 | longpass | mounted | M30.5 x 0.5 | 480 - 1100 | |
| MIDOPT FIL LP470/C-MOUNT | longpass | mounted | C-Mount | 480 - 1100 | |
| MIDOPT FIL LP530/30.5 | longpass | mounted | M30.5 x 0.5 | 545 - 1100 | |
| MIDOPT FIL LP530/43 | longpass | mounted | M43 x 0.75 | 545 - 1100 | |
| MIDOPT FIL LP530/C-MOUNT | longpass | mounted | C-Mount | 545 - 1100 | |
| MIDOPT FIL LP550/35 GLASS | longpass | unmounted | 35 | 560 - 1100 | |
| MIDOPT FIL LP550/62 | longpass | mounted | M62 x 0.75 | 560 - 1100 | |
| MIDOPT FIL LP590/37.5 | longpass | mounted | M37.5 x 0.5 | 605 - 1100 | |
| MIDOPT FIL LP610/22 GLASS | longpass | unmounted | 22 | 620 - 1100 | |
| MIDOPT FIL LP610/27 | longpass | mounted | M27 x 0.5 | 620 - 1100 | |
| MIDOPT FIL LP610/37.5 | longpass | mounted | M37.5 x 0.5 | 620 - 1100 | |
| MIDOPT FIL LP610/46 | longpass | mounted | M46 x 0.75 | 620 - 1100 | |
| MIDOPT FIL LP610/49 | longpass | mounted | M49 x 0.75 | 620 - 1100 | |
| MIDOPT FIL LP610/72 | longpass | mounted | M72 x 0.75 | 620 - 1100 | |
| MIDOPT FIL LP610/83 GLASS | longpass | unmounted | 83 | 620 - 1100 | |
| MIDOPT FIL LP630/25.5 | longpass | mounted | M25.5 x 0.5 | 645 - 1100 | |
| MIDOPT FIL LP630/27 | longpass | mounted | M27 x 0.5 | 645 - 1100 | |
| MIDOPT FIL LP630/34 | longpass | mounted | M34 x 0.5 | 645 - 1100 | |
| MIDOPT FIL LP630/72 | longpass | mounted | M72 x 0.75 | 645 - 1100 | |
| MIDOPT FIL LP850/43 | longpass | mounted | M43 x 0.75 | 870 - 1100 | |
| MIDOPT FIL LP920/52 | longpass | mounted | M52 x 0.75 | 930 - 2300 | |
| MIDOPT FIL LP920/55 | longpass | mounted | M55 x 0.75 | 930 - 2300 |
| File | Topics | Size | ||
| Midwest Optical - Using filters in colour inspection, increase resolution through optical filtering | Data sheets |
10.2 MB |