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Hard coat broadband filters

From Andover

Our first-surface, hard-coat, broadband filters employ magnetron sputtered, hard-oxide coatings deposited on Borosilicate Glass and do not utilize any absorbing filter glasses, making them suitable for high temperature applications. They provide a steep transition from a high, peak transmission to OD4 blocking. Available at standard Raman wavelengths: 488, 514, 532, 633, 785nm. We offer three standard sizes, with custom sizes available on request.

Features

First surface, hard sputtered coating

Specifications

General Specifications
Thickness	3.0±0.25 mm
Size Tolerance	+0.0 mm / -0.2 mm
Minimum Clear Aperture	85% of outside dimension
Substrate Material	Borosilicate Glass
Flatness	3 - 5 waves
Surface Quality	60 - 40 per MIL-C-48497A
Humidity and Abrasion	Per MIL-C-675A
Durability	Per MIL-C-48497A
Operating Temperature	-50 °C - +200 °C
Mechanical	Unmounted
Optional: Mounted in the threaded ring - contact our expert on the right for thread sizes

CW/L (nm)	FWHM (nm)	Line	Transmission T (avg.)	OD4 (avg.) Blocking @ (nm)	Part Number
335 441.6 470	80±-8.0 150±15.0 100±10.0	Zinc He/Cd laser LED	≥75% ≥80% ≥90%	200-650 200-850 200-850	355HC80 442HC150 470HC100
488 514 532	80±8.0 80±8.0 150±15.0	Argon laser Argon laser Na:YAG	≥90% ≥90% ≥90%	200-850 200-850 200-950	488HC80 515HC80 532HC150
550 632.8 785	300±30.0 90±9.0 150±15.0	LED HeNe Sapphire	≥90% ≥90% ≥90%	200-1000 200-1000 200-1100	550HC300 633HC90 785HC150