Bandpass Filters, Φ25.4mm, FWHM=10nm, CWL 640nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3304-YJL)

Bandpass Filters, Φ25.4mm, FWHM=10nm, CWL 640nm, model 198703, is manufactured by United Optical Technology Co., Ltd.
The transmission band of Domestic Bandpass Filters is surrounded by two cutoff bands. It only allows part of the wavelengths in the spectrum to pass through. It is often used to transmit a part of the spectrum while blocking all other wavelengths.
Bandpass filters are suitable for a variety of applications such as spectroscopy, clinical chemistry or imaging. Bandwidth is the spectral range of illumination light transmitted by an optical filter. Narrow bandwidth (<20NM) optical filters are commonly used in elemental and chemical analysis applications, analytical instruments, and laser cleanup. Wide bandwidth (>20NM) is commonly used in imaging applications including fluorescence microscopy, machine vision, and factory automation.

Diameter: Φ25.4mm
Center Wavelength(CWL): 640nm
Full Width-Half Max(FWHM): 10nm
Transmission(T): ＞50%
Central Wavelength Tolerance: ±2nm
Full Width-Half Max Tolerance: ±2nm
Blocking: ≥OD3@200-1200nm

The surface of the bandpass filter is coated with a hard film using an ion sputtering process, and a black alumina ring is used for packaging.

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