Ultrasteep Longpass Filter, Φ25mm (Mounted), Laser Wavelength=488nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3795-YJL)

Ultrasteep Longpass Filter, Φ25mm (Mounted), Laser Wavelength=488nm, model 208692, is manufactured by United Optical Technology Co., Ltd.
Ultrasteep 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 ultra-steep long-pass filter standard products with diameters of 12.5mm and 25mm in packaged and unpackaged versions and wavelengths of 488nm-1064nm laser wavelengths.
The arrow on the mounting ring of this filter indicates the preferred direction of light propagation. 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: Φ25mm (Mounted)
Laser Wavelength: 488nm
Transmission Band: Tavg＞93%@491.2-1100.8 nm
Edge Wavelength: 489.1nm
Blocking Band 1: ODabs＞6@488 nm
Blocking Band 2: ODavg＞6@394-488 nm(typical)
Transition Width (1): 2.4nm
Transition Width (2): 102cm^-1
Edge Steepness: 0.002
Edge Steepness (1): 1.0nm
Edge Steepness (2): 40.9cm^-1
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: ≥22mm
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 ultra-steep transition from reflection to transmission. It is widely used in microscopic imaging, Raman spectroscopy, biochemical analysis instruments, life sciences, education and scientific research and other related fields.

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Ultrasteep Longpass Filter, Φ25mm, Laser Wavelength=488nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3801-YJL)