Steep Long Pass Filter, Φ12.5mm, Laser Wavelength=830nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3769-YJL)

Steep Long Pass Filter, Φ12.5mm, Laser Wavelength=830nm, model 208666, is manufactured by United Optical Technology Co., Ltd.
Steep Long Pass Filter allows light with a wavelength larger than the set wavelength to pass through, and cuts off light with a wavelength smaller than the set wavelength.
United Optical Technology has launched standard steep long-pass filters with diameters of 12.5mm and 25mm in packaged and unpackaged versions and wavelengths of 488nm-1064nm laser wavelengths.
Please wear finger cots when using, and do not touch the surface directly with your fingers to avoid residual fingerprints affecting the light transmission effect. If the filter surface is dirty, use dust-free lens cleaning paper dipped in alcohol to wipe the lens surface. Do not use cloth or paper with a very rough surface or water to wipe it, otherwise it will damage the surface.

Diameter: Φ12.5mm
Laser Wavelength: 830nm
Edge Steepness: 0.005
Edge Steepness (1): 4.2nm
Edge Steepness (2): 59.9cm^-1
Transition Width (1): 8.3nm
Transition Width (2): 119cm^-1
Edge Wavelength: 836.9nm
Transmission Band: Tavg＞93%@840.8-1872.2nm
Blocking Band 1: ODabs＞6@830nm
Blocking Band 2: ODavg＞6@675-830nm(typical)
Material: UV Fused Silica
Diameter Tolerance: +0.0/-0.1mm
Mount Thickness: 3.5mm
Substrate Thickness: 2.0mm
Thickness Tolerance: ±0.1mm
Surface Quality: 60-40
AOI: 0±2°
Clear Aperture: ≥10mm
Laser Damage Threshold: 0.5J/cm²@266nm(10ns pulse width); 1J/cm²@532nm(10ns pulse width)
Note: Arrow on ring indicates preferred direction of propagation of light.

This filter has the characteristics of high laser damage threshold, deep cut-off depth, and steep transition from reflection to transmission. It is widely used in microscopic imaging, Raman spectroscopy, biochemical analysis instruments, life sciences, education and research and other related fields.

Steep Long Pass Filter, Φ12.5mm, Laser Wavelength=1064nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3770-YJL)
Steep Long Pass Filter, Φ25mm (Mounted), Laser Wavelength=488nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3771-YJL)
Steep Long Pass Filter, Φ25mm (Mounted), Laser Wavelength=532nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3772-YJL)
Steep Long Pass Filter, Φ25mm (Mounted), Laser Wavelength=632.8nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3773-YJL)
Steep Long Pass Filter, Φ25mm (Mounted), Laser Wavelength=785nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3774-YJL)
Steep Long Pass Filter, Φ25mm (Mounted), Laser Wavelength=830nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3775-YJL)