FND-20C02-30 20 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
- 20 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-20C02-30 20 mm Dia. Unmounted N-BK7 Visible Reflective Neutral Density Filter; t=2mm 400-700nm
The FND-20C02-30 is a high-quality Neutral Density Filter, unmounted and with a 20 mm diameter, sourced from the reputable vendor OptoSigma. This particular model is designed for use within the visible light spectrum, specifically catering to wavelengths between 400 and 700 nanometers.
The filter boasts a thickness of 2mm, providing a robust and durable platform for various optical applications. Its base shape is circular, allowing for easy integration into a wide range of optical systems. The material used for this filter is N-BK7, a type of borosilicate glass manufactured by Schott AG, renowned for its excellent optical properties and versatility.
The FND-20C02-30 is coated with OptoSigma's proprietary FND-30 coating on both the front and back surfaces. This coating enhances the filter's performance, providing a reflective neutral density effect that is crucial in many optical setups. The coating also ensures the filter maintains a thin lens shape, minimizing any potential distortions and maintaining the integrity of the optical path.
