Specifications

Substrate material

UV Grade Fused Silica or BK7

Diameter

25.0 +0~-.025 mm

Thickness

3 ¡À 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¡ã ¡À 5¡ã

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

¡Ü1 wave @ 633nm per 25mm

Humidity resistance

Per MIL-C-675A

Abrasion resistance

Per MIL-C-675A

Optimum temperature

23¡ãC

Temperature limits

-50¡ãC to 100¡ãC

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)

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LWT is able to provide the following long pass filters

Part No.

COWL

(nm)

Attenuation

Range (nm)

Wavelength

at 50% T (nm)

Transmission

Range (nm)

VIS-LPF400

400

340-380

400 ¡À10

440-1320

VIS-LPF450

450

380-430

450 ¡À10

495-1485

VIS-LPF500

500

425-475

500 ¡À10

550-1650

VIS-LPF550

550

470-525

550 ¡À10

605-1815

VIS-LPF600

600

515-575

600 ¡À10

660-1980

VIS-LPF650

650

550-620

650 ¡À10

715-2145

VIS-LPF700

700

600-670

700 ¡À10

770-2200

NIR-LPF750

750

640-715

750 ¡À10

825-2200

NIR-LPF800

800

685-760

800 ¡À10

880-2200

NIR-LPF850

850

725-810

850 ¡À10

935-2200

NIR-LPF900

900

770-860

900 ¡À10

990-2200

NIR-LPF950

950

810-910

950 ¡À10

1045-2200

NIR-LPF1000

1000

855-955

1000 ¡À10

1100-2200

NIR-LPF1100

1100

930-1050

1100¡À10

1150-2200

NIR-LPF1200

1200

1020-1150

1200¡À10

1250-2200

NIR-LPF1300

1300

1110-1250

1300¡À10

1350-2200

NIR-LPF1400

1400

1200-1350

1400¡À10

1450-2200

NIR-LPF1500

1500

1290-1450

1500¡À10

1550-2200

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