Hard To Find Sp651-35.5 Nir And Mid Red Dichroic Block Near Uv And Visible Shortpass Filter M35.5x0.5 Deal Alert: 80% Off [H6Q4ytd2]

MidOpt SP651-35.5 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 SP651-35.5 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	35.5mm
Filter Thread	M35.5x0.5
Outer Diameter	39mm
Clear Aperture	31.9mm
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