The typical parameters of the narrow-bandwidth filter for 852nm, see below:
IF 780 852nm/6°
IBS coating interference filter780 852nm, FWHM ~0.37nm, AOI 6°
angle tuning required: ±2°(best effort)
Peak transmittance: typical > 85%
AR-coating: R<0.1%
Size: Phi20x2mm
Plane surface form deviations: 3/0,5, Wedge: <5'