Product Description
Thorlabs FGB37 BG40 Colored Glass Bandpass Filter
This precision filter provides spectral control for applications requiring UV-to-orange wavelength transmission.
Key Specifications:
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Material: BG40 colored glass
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Diameter: 25mm (±0.2mm)
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Thickness: 3mm nominal
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Transmission: >80% @ 400-550nm
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Blocking: OD>4 outside passband
Optical Performance:
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Cut-On: 335nm (50% point)
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Cut-Off: 610nm (50% point)
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Surface Quality: 60-40 scratch-dig
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Coating: AR on both sides (400-700nm)
Condition:
✅ NEW IN PROTECTIVE PACKAGING
✅ OPTICALLY INSPECTED
✅ EDGES BEVELED (chamfered for safety)
Applications:
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Fluorescence microscopy
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Machine vision lighting
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Spectral imaging
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Laser beam conditioning



