900-980nm neutral density attenuation film (od3.5)

Ruicheng Optoelectronic Absorption Type Neutral Densityoptical filterThe process uses neutral gray glass and precision processes such as processing and polishing, achieving high-quality surface smoothness and parallelism. Compared to reflective typeNeutral density filterDifferently, the absorption type neutral densityoptical filterBy using substrate materials with different parameters and controlling the thickness, different light attenuation indicators can be achieved. This type of filter has low surface reflection and a flat spectral response in the visible light range. It can be widely used in machine vision systems, spectral measurement, imaging optical systems, and low-power laser light output attenuation applications.

Material: Neutral gray glass
Wavefront error: wavelength/4 @ 920nm
Parallel difference:<1 point
Surface smoothness: 60/40
Dimensional error:+0/-0.2mm
Application band: 900-980nm (other bands can be customized)
Optical density error:+-5% @ 920nm
Transmittance: 50.1%
Product size: 50 * 50 * 1.54mm (thickness according to specifications)
Optical density: OD3.5

Actual measured spectral curve: