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Bandpass Filters
Precision Bandpass Filters (Narrowband & Broadband Optical Optics)
Bandpass filters (categorized into narrow bandpass [NBPF] and wide/broad bandpass filters [BBPF]) are precision thin-film interference optics designed to selectively isolate and transmit a designated spectral band while efficiently reflecting or attenuating out-of-band wavelengths.
Functions:
Engineered via vacuum-deposited dielectric thin films (PVD-EBGE), these filters deliver high peak transmittance within the target passband ($T \ge 85\%–95\%$), steep transition slopes, and deep out-of-band blocking (up to OD4–OD6). They effectively suppress ambient background noise, isolate specific laser emission lines or fluorophore signal wavelengths, and enhance signal-to-noise ratio in optical sensors and machine vision systems.
Applications:
Raman spectroscopy
Biochemical analyzers
LiDAR sensor modules
Laser alignment systems
Fluorescence microscopy
Medical diagnostic instruments
Automated Optical Inspection (AOI) machine vision
#BP5055 #BP510 #BP560
#BP5060 #BP630 #BP6570
#BP6070 #BP8090 #BP8493
#BP8998 #Information and Notes
ITEM NO: BP435
Spectral Characteristics
T peak=435 +/-15nm
Tave<5% @ 200-375nm
Tave<5% @ 520-1050nm
Physical Characteristics
Glass: 3.3mm
Square: 8x8 - 80x80mm
Round: Dia8 - 75mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP550
Spectral Characteristics
T peak=550 +/-15nm
Tave<1% @ 400-500nm
Tave<1% @ 690-1100nm
Physical Characteristics
Glass: 2.2mm
Square: 8x8 - 80x80mm
Round: Dia8 - 75mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP4050
Spectral Characteristics
Tave>85%= 430-470nm
Tave<1% @ 500-900nm
Tave<1% @ 200-370nm
Physical Characteristics
Glass: 1.1mm
Borosilicate: 1.1mm
Square: 8x8 - 220x220mm
Round: Dia8 - 210mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP5055
Spectral Characteristics
Tave<5% @ 200-420nm
Tave>65% @ 510-540nm
Tave<5% @ 650-1050nm
Physical Characteristics
Glass: 3.3mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP510
Spectral Characteristics
Tave<5% @ 200-420nm
Tave>70% @ 505-510nm
Tave<5% @ 580-1000nm
Physical Characteristics
Glass: 1.1mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP560
Spectral Characteristics
Tave<5% @ 200-480nm
Tave>70% @ 550-570nm
Tave<5% @ 630-1000nm
Physical Characteristics
Glass: 1.1mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP5060
Spectral Characteristics
Tave<5% @ 430-470nm
Tave>85% @ 530-570nm
Tave<5% @ 680-1050nm
Physical Characteristics
Glass: 1.1mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP630
Spectral Characteristics
Tave<5% @ 200-480nm
T peak= 630 +/-15nm
Tave<5% @ 720-1050nm
Physical Characteristics
Glass: 1.1mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP6570
Spectral Characteristics
Tave<5% 200-570nm
Tave>75% @ 665-690nm
Tave<5% @ 780-1050nm
Physical Characteristics
Glass: 2.2mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP6070
Spectral Characteristics
Tave<5% 420-550nm
Tave>75% @ 630-660nm
Tave<5% @ 750-1100nm
Physical Characteristics
Glass: 1.1mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP8090
Spectral Characteristics
Tave<5% @ 420-750nm
Tave>75% @ 840-860nm
Tave<5% @ 950-1100nm
Physical Characteristics
Glass: 0.7, 1.1mm
Square: 8x8 - 160x160mm
Round: Dia8 - 150mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP8493
Spectral Characteristics
Tave<5% @ 420-780nm
Tave>75% @ 850-904nm
Tave<5% @ 1050-1100nm
Physical Characteristics
Glass: 0.7, 1.1mm
Square: 3*3 - 220*220mm
Round: Dia4 - 210mm
Resistant Temperature
Glass: 150℃
ITEM NO: BP8998
Spectral Characteristics
Tave<5% @ 420-830nm
Tave>80% @ 930-950nm
Tave<5% @ 1050-1100nm
Physical Characteristics
Glass: 0.7, 1.1mm
Square: 3*3 - 220*220mm
Round: Dia4 - 210mm
Resistant Temperature
Glass: 150℃
Information and Notes
1. Precision optical bandpass filters feature multi-layer dielectric interference coatings comprising 34 to 62 layers vacuum-deposited on high-quality optical glass substrates, achieving sharp edge transitions and deep out-of-band blocking.
2. Manufactured using Physical Vapor Deposition with Electron Beam Gun Evaporation (PVD-EBGE) technology, ensuring exceptional coating density, precise center wavelength (CWL) accuracy, and robust environmental durability.
3. Select bandpass configurations utilize multi-substrate laminated assemblies to expand out-of-band rejection ranges, with overall component thickness ranging from 1.1 mm to 4.4 mm.
4. Standard machine vision and optical testing thread mounts are available upon request, including M49, M52, M55, M58, and custom adapter rings.
5. Spectral transmittance curves represent measurements captured at normal incidence (0° angle of incidence).
6. Transmittance curves reflect actual physical sample measurement data and are subject to minor manufacturing tolerances between production lots while remaining strictly within engineering spectral limits.
7. D263T is a registered trademark of SCHOTT AG.
