FND-25C02-50 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-25C02-50 25 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm
This is the FND-25C02-50, a 25 mm diameter, unmounted Neutral Density Filter from OptoSigma. It is designed for use in the visible light spectrum, specifically between 400-700nm. The filter features a thickness of 2mm and is made of N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties.
The filter's primary function is to reduce the intensity of light without altering its color composition. This is achieved through the use of a reflective coating, denoted as 'opt fnd-50' on both the front and back surfaces. This coating ensures a high level of neutrality, meaning it does not favor any specific color within the light spectrum.
The FND-25C02-50 is shaped as a thin lens, making it suitable for use in various optical systems. It is currently in stock and can be purchased directly from the OptoSigma website using the provided weblink.