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Descripción
MidOpt SP651-72 NIR and Mid Red Dichroic Block Near UV and Visible Shortpass Filter
SP651 near-infrared blocking filters are designed to pass near-UV and visible energy from 350-645 nm while effectively blocking NIR radiation from 650 – 1050 nm. This filter also blocks UV transmission below 350nm. CCD/CMOS imagers that need to pass near-UV AND visible wavelengths can utilize these filters to block NIR light while preventing a reddish, washed-out color in the final image. Used at normal incidence, these filters can also be placed in front of some UV-transmitting arc lamps to limit the amount of NIR radiation (= heat) that potentially might damage any subject under illumination.Although the SP651 substrate is bubble-free UV grade fused silica, it is possible that some sort of additional mechanical cooling of the area around this hot mirror may be important – depending on the wattage of the lamp that is being used.
MidOpt SP651-72 Technical Specifications:
| Product Line / Series | SP - Visual Pass NIR Block |
| Filter Model | SP651 |
| Filter Type | NIR and Mid Red Dichroic Block Near UV and Visible Shortpass |
| StablEDGE | No |
| Useful Range | 355nm - 635nm |
| Tolerance | +/- 10nm |
| Peak Transmission | ≥90% |
| Surface Quality | 40/20 |
| Filter Size | 72mm |
| Filter Thread | M72x0.75 |
| Outer Diameter | 80mm |
| Clear Aperture | 71.9mm |
| Overall Thickness | 6.5mm |
| Exposed Thickness | 4.5mm |
| FWHM | Not Specified |
| Cut-on Wavelength 50% T | 635nm |
| Average Transmission | Not Specified |
| Brand | Midwest Optical Systems |
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