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

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

Laser Induced Damage Threshold(LIDT)

>5J/cm2 (1.06mm, 1ns)

LWT is able to provide the following short pass filters

Part No.

COWL

(nm)

Transmission

Range (nm)

Wavelength

at 50% T (nm)

Attenuation

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