CONFIGURATION: DISC, PLANE-WEDGED
DIAMETER: 35.00mm +/- 0.05mm
THICKNESS: 3.50mm +/- 0.025mm (AT CENTER OF WEDGE)
WEDGE ANGLE: 0.17 DEGREE +/- 0.10 DEGREE
EDGE BEVEL: 0.25mm NOMINAL X 45deg, 2 PLACES.
CLEAR APERTURE: CENTRAL 29.50mm MINIMUM DIAMETER,
2 FACES.
SURFACE ACCURACY: PWR: 2 FRINGES MAXIMUM, 2 FACES
IRRG: 1 FRINGE MAXIMUM, 2 FACES
SURFACE QUALITY: 60-40 PER MIL-C-48497, 2 FACES.
SURFACE ROUGHNESS: 20 ANGSTROMS Ra MAXIMUM.
MATERIAL TYPE/QUALITY: SAPPHIRE, SCHLIEREN GRADE,
NO TWINNING, C-AXIS PERP.
TO FACES (NO BIREFRINGENCE)
MARKING: ARROW SCRIBED ON OD SURFACE POINTING
TOWARDS WEDGED FACE AT HIGH SIDE OF WEDGE
“XXX” SCRIBED ON OD SURFACE NEXT TO ARROW
DESIGNATING SHORT-WAVE WINDOW.
COATING: NONE, UNCOATED SUBSTRATE.