Oriel Instruments 57570 Narrowband Bandpass Filter 547.5nm 600nm 1 Inch Optics

Oriel Instruments 57570 Narrowband Bandpass Filter 547.5nm 600nm 1 Inch Optics

The Oriel Instruments 57570 is a 1-inch diameter narrowband bandpass (interference) filter with a center wavelength of 547.5 nm, transmitting a narrow band of visible green light while blocking out-of-band wavelengths. It is supplied with its original yellow Oriel storage pouch and a hand-annotated spectral transmission chart confirming the filter's wavelength, bandwidth, and blocking characteristics.

Specifications & What's Included

• Manufacturer: Oriel Instruments (Newport Corporation)
• Model / Part Number: 57570
• Filter Type: Narrowband Bandpass / Interference Filter
• Center Wavelength: 547.5 nm (visible green)
• Bandwidth: 600 (per spec card — see photo; consistent with a narrow FWHM passband)
• Filter Diameter: 1 inch (25.4 mm)
• Filter Shape: Round disc
• Element Appearance: Orange-tinted glass element in metal ring mount
• Included: Original yellow Oriel Instruments storage pouch
• Included: Original hand-annotated spectral transmission chart (wavelength response curve)

Applications

Narrowband bandpass filters like the Oriel 57570 are standard components in optical spectroscopy, photometry, fluorescence microscopy, and laser line isolation setups. By transmitting only a tightly defined wavelength band — in this case centered near 547.5 nm in the green region of the visible spectrum — they allow instruments to measure or image specific spectral features while rejecting broadband background light. Oriel Instruments (now part of Newport Corporation) has long produced precision optical filters for laboratory, scientific, and OEM photonic applications, and the 57570 series filters are commonly found in monochromator calibration, solar simulators, colorimetry, and photoluminescence measurements. The 1-inch format is a widely used standard diameter that fits most filter wheel holders, filter mounts, and optical bench accessories from Oriel, Newport, and compatible third-party systems.