Specifications
Substrate material	UV Grade Fused Silica or BK7
Diameter	25.0 +0~-.025 mm
Thickness	3 ± 0.5 mm
Min. clear aperture	>85% of diameter
Transmission	>90% average within specified range
Attenuation	>99% average within specified range
Angle of incidence	0° ± 5°
Coating Technology	Electron beam evaporation, dielectric multilayers
Surface quality	20/10 per MIL-O-13830B
Coating quality	40/20 per MIL-O-13830B
Wedge	<3 minutes
Wavefront distortion	≤1 λ @ 633nm per 25mm
Humidity resistance	Per MIL-C-675A
Abrasion resistance	Per MIL-C-675A
Optimum temperature	23°C
Temperature limits	-50°C to 100°C
Certification	Spectrophotometer print of lot sample
Laser Induced Damage Threshold(LIDT)	>10J/cm2 (1.06μm, 1ns)

Part No.	COWL	Transmission	Wavelength	Attenuation
	(nm)	Range (nm)	at 50% T (nm)	Range (nm)
40-0001	450	305-425	450 ±10	475-530
40-0006	500	340-475	500 ±10	525-600
40-0011	550	375-520	550 ±10	575-650
40-0016	600	400-565	600 ±10	630-720
40-0021	650	400-615	650 ±10	680-760
40-0026	700	400-660	700 ±10	735-835
40-0031	750	400-710	750 ±10	790-885
40-0036	800	400-755	800 ±10	840-940
40-0041	850	400-805	850 ±10	895-1000
40-0047	900	400-850	900 ±10	945-1060
40-0052	950	400-900	950 ±10	1000-1125
40-0057	1000	400-945	1000 ±10	1050-1180

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