MIDOPT - Longpass Filters

Often referred to as a “sharp-cut” filter, Longpass Filters are specifically designed to pass a broad spectrum of longer wavelength light while blocking shorter wavelengths.

Longpass Filters

Part#	Description	Useful Range	StablEDGE
● LP285	High Transmission Heat Resistant VIS-NIR A/R Protective Window	350-1100nm	✓
● LP330	Protective Window	350-1100nm	✓
● LP340	A/R Protective Window	350-800nm	✓
● LP390	UV Absorbing Protective Window	410-1100nm	✓
● LP415	UV Block A/R Protective Window	415-1100nm

 

LP Series - Longpass

Part#	Description	Useful Range	StablEDGE
● LP470	Light Yellow Longpass Filter	480-1100nm	✓
● LP500	Yellow Longpass Filter	510-1100nm	✓
● LP515	Yellow-Orange Longpass Filter	520-1100nm	✓
● LP530	Orange Longpass Filter	545-1100nm	✓
● LP550	Orange Longpass Filter	560-1100nm	✓
● LP580	Red-Orange Longpass Filter	585-1100nm	✓
● LP590	Red Longpass Filter	605-1100nm	✓
● LP610	Red Longpass Filter	620-1100nm	✓
● LP630	Red Longpass Filter	645-1100nm	✓
● LP645	Dark Red Longpass Filter	650-1100nm	✓
● LP665	Dark Red Longpass Filter	680-1100nm	✓
● LP695	Near-IR Longpass Filter	715-1100nm	✓
● LP715	Near-IR Longpass Filter	730-1100nm	✓
● LP780	Near-IR Longpass Filter	800-1100nm	✓
● LP800	Near-IR Longpass Filter	820-1100nm	✓
● LP815	Near-IR Longpass Filter	825-1100nm	✓
● LP830	Near-IR Longpass Filter	845-1100nm	✓
● LP850	Near-IR Longpass Filter	870-1100nm	✓
● LP900	(Limited) Near-IR Longpass Filter	910-1100nm
● LP920	Short-Wave Infrared Longpass Filter	930-1100nm
● LP1000	Short-Wave Infrared Longpass Filter	1010-1500nm	✓

• Economical solution for isolating specific spectral regions
• Peak transmission ≥90%
• StablEDGE® design reduces angular dependency and minimizes short-shifting effects
• Anti-reflection coated for maximum transmission in VIS and NIR spectrums
• Can be used with Shortpass Filters for a custom, fine-tuned Bandpass Filter
• Double-side polished glass for exceptional parallelism and optical flatness
• Exceptional surface quality; 40/20 scratch/dig
• Available in wavelength ranges from 350nm to 1500nm

Longpass Filters are often used in fluorescence applications to block an excitation light source or to pass multiple emission wavelengths, improving signal to noise ratio. Longpass Filters are also commonly used in photography and astronomy.