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

>85% average within specified range

Attenuation

>99% average within specified range

Angle of incidence

0＜ ＼ 5＜

Coating Technology

Electron beam evaporation, dielectric multilayers

LPF Blockings

From 80% of cut-on λ to X-ray with the O.D. of 3

SPF Blockings

From 120% of cut-off λ to 1200nm(typical) with the O.D. of 3

Surface quality

80/50 per MIL-O-13830B

Coating quality

40/20 per MIL-O-13830B

Wedge

<3 minutes

Wavefront distortion

＋1 wave @ 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

Cleaning

Non-abrasive method, isopropyl alcohol on lens tissue recommended