NE520B Dia. 0.5 in Absorptive ND Filter; Optical Density 2.0
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5150823520020043
- λ
- 633 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
NE520B Dia. 0.5 in Absorptive ND Filter; Optical Density 2.0
The NE520B is a Neutral Density (ND) Filter, measuring 0.5 inches in diameter, manufactured by Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an essential component in various optical applications.
The filter is made of n-bk7 schott, a high-quality optical glass, and features a circular shape. It has a diameter of 12.7 millimeters and a thickness of 1.4 millimeters, ensuring a compact yet robust design. The NE520B boasts a wavelength of 633 nanometers, which is within the visible light spectrum.
The NE520B is coated with tho ne20a on both the front and back surfaces, providing an optical density of 2.0. This coating enhances the filter's light absorption capabilities, enabling it to effectively reduce light intensity. The coating also ensures a 'Thin Lens' shape, minimizing optical aberrations and distortions.
The NE520B is currently in stock and available for purchase through the Thorlabs website. For more information, please refer to the provided weblink.