FND-25C02-70 25 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- OptoSigma
Properties
- Shape
- Circular
- Diameter
- 25 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5185223876207927
- λ
- 550 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
FND-25C02-70 25 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm
OptoSigma's FND-25C02-70 is a 25 mm diameter, unmounted Neutral Density Filter, designed for use in the visible light spectrum, specifically between 400-700nm. This filter is made from N-BK7, a high-quality borosilicate glass known for its excellent optical properties, produced by Schott.
The filter features a reflective coating, denoted as 'opt fnd-70' on both the front and back surfaces. This coating is designed to provide a neutral density effect, reducing the intensity of light without altering its color balance. The thickness of the filter is 2mm, contributing to its robustness and durability.
The FND-25C02-70 is a versatile option for various optical applications, thanks to its thin lens shape. It is currently in stock and available for immediate purchase through the OptoSigma website, as indicated by its 'Valid - in stock' weblink status.