Unser Partner Andover Corp.

Edge filters

from Andover

Often referred to as long wave pass (LWP) and short wave pass (SWP) filters, edge filters provide a well-defined transition between reflecting and transmitting regions. Essentially a modified quarter-wave stack, the filters use interference effects rather than absorption to isolate their spectral bands. Because edge filters will shift shorter with an increase in the angle of incidence, they are a good choice for fine-tuning the cut-on/cut-off wavelength. With their durable, first-surface dielectric coatings, Andover’s edge filters are built to withstand the normal cleaning and handling required by any high-quality optical component.

  • Useful for redirecting a particular band of light
  • Provide steeper transition than color glass filters
  • Offer coverage over the 400–1000 nm range


General Specifications
Thickness 4.0 mm maximum
Size Tolerance +0.0/-0.5 mm
Min. Clear Aperture 85% of outside dimension
Substrate Material Glass (Note: BK-7 or Borofloat available as an Option for higher Tx)
Flatness 3-5 waves per 25 mm
Surface Quality 80/50 per MIL-C-48497A
Humidity and Abrasion Per MIL-C-675A
Operating Temperature -50 °C to +100 °C
Cut-on/cut-off Slopes 6% Maximum (10% for 300 nm filter)
Cut-on/cut-off Tolerance ±10 nm from 400-1000 nm
± 5 nm from 300-375 nm
Mechanical Unmounted
Optional: Mounted in threaded ring - contact our expert on the right for thread sizes
Long Wave Pass 85% average from the 50% cut-on point to 2000 nm
Short Wave Pass 85% average from the 50% cut-off point to 0.6 x the 50% cut-off point
Note: With the exception of the 400 nm filter, all SWP filters will drop off in transmission at wavelengths under 425 nm.
Long Wave Pass 99% or greater from 0.9 x the 50% point to the ultraviolet
Short Wave Pass 99% or greater from 1.07 x the 50% point to 1.25 x the 50% point
Effective Index of Refraction (n*) 1.7 (approximately)

50% Point Size, Shape & Part Number
12.5 mm Ø 25 mm Ø 50 mm Ø 50 mm SQ
300 nm 300FH90-12.5 300FH90-25 300FH90-50 300FH90-50S
325 nm 325FH90-12.5 325FH90-25 325FH90-50 325FH90-50S
350 nm 350FH90-12.5 350FH90-25 350FH90-50 350FH90-50S
375 nm 375FH90-12.5 375FH90-25 375FH90-50 375FH90-50S
400 nm 400FH90-12.5 400FH90-25 400FH90-50 400FH90-50S
450 nm 450FH90-12.5 450FH90-25 450FH90-50 450FH90-50S
500 nm 500FH90-12.5 500FH90-25 500FH90-50 500FH90-50S
550 nm 550FH90-12.5 550FH90-25 550FH90-50 550FH90-50S
600 nm 600FH90-12.5 600FH90-25 600FH90-50 600FH90-50S
650 nm 650FH90-12.5 650FH90-25 650FH90-50 650FH90-50S
700 nm 700FH90-12.5 700FH90-25 700FH90-50 700FH90-50S
Near Infrared
50% Point Size, Shape & Part Number
12.5 mm Ø 25 mm Ø 50 mm Ø 50 mm SQ
750 nm 750FH90-12.5 750FH90-25 750FH90-50 750FH90-50S
800 nm 800FH90-12.5 800FH90-25 800FH90-50 800FH90-50S
850 nm 850FH90-12.5 850FH90-25 850FH90-50 850FH90-50S
900 nm 900FH90-12.5 900FH90-25 900FH90-50 900FH90-50S
950 nm 950FH90-12.5 950FH90-25 950FH90-50 950FH90-50S
1000 nm 100FH90-12.5 100FH90-25 100FH90-50 100FH90-50S


50% Point Size, Shape & Part Number
12.5 mm Ø 25 mm Ø 50 mm Ø 50 mm SQ
400 nm 400FL07-12.5 400FL07-25 400FL07-50 400FL07-50S
450 nm 450FL07-12.5 450FL07-25 450FL07-50 450FL07-50S
500 nm 500FL07-12.5 500FL07-25 500FL07-50 500FL07-50S
550 nm 550FL07-12.5 550FL07-25 550FL07-50 550FL07-50S
600 nm 600FL07-12.5 600FL07-25 600FL07-50 600FL07-50S
650 nm 650FL07-12.5 650FL07-25 650FL07-50 650FL07-50S
700 nm 700FL07-12.5 700FL07-25 700FL07-50 700FL07-50S
Near Infrared
50% Point Size, Shape & Part Number
12.5 mm Ø 25 mm Ø 50 mm Ø 50 mm SQ
750 nm 750FL07-12.5 750FL07-25 750FL07-50 750FL07-50S
800 nm 800FL07-12.5 800FL07-25 800FL07-50 800FL07-50S
850 nm 850FL07-12.5 850FL07-25 850FL07-50 850FL07-50S
900 nm 900FL07-12.5 900FL07-25 900FL07-50 900FL07-50S
950 nm 950FL07-12.5 950FL07-25 950FL07-50 950FL07-50S
1000 nm 100FL07-12.5 100FL07-25 100FL07-50 100FL07-50S


Color enhancement and combining


Jörg Tobisch
Jörg Tobisch


Quantum Design GmbH

Im Tiefen See 58
64293 Darmstadt

Telefon:+49 6151 8806-0
Fax:+49 6151 8806920
Jörg TobischProdukt Manager - Optik
+49 6151 8806-50
E-Mail schreiben