Expose Curved Barrier Yellow Filter

The Arrowhead forensics Expose curved filter compensates for camera lens distortion when imaging fingerprint ridge detail using blue lasers or ALS light sources.

The only yellow filter you’ll ever need.

Discover how much more detail is “exposed” with this unique filter. This filter has a unique curved design that has renders more ridge detail when taking photographs with the Blue Lasers (315-460nm) with an optical density of 5+ and other LED light sources in the 315nm-460nm range. This Long Pass Filter blocks outside laser/ALS light and passes longer wavelengths emitted from trace evidence samples to capture images with more detail using a suitable camera.  The Curve filter allows you to compensate for Gaussian roll-off of non-oblique light (not heading directly into the lens axis). Made of polycarbonate with the choice of 62, 67, 77 mm thread mount.