NE540B Dia. 0.5 in Absorptive ND Filter; Optical Density 4.0
- 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
NE540B Dia. 0.5 in Absorptive ND Filter; Optical Density 4.0
The NE540B is a Neutral Density Filter from Thorlabs, designed with a circular base shape and a diameter of 0.5 inches. This filter is made of n-bk7 schott material, a common choice in the industry due to its excellent optical properties. The filter's thickness is 2.8 millimeters, providing a robust and durable structure.
The NE540B features a Thin Lens shape, which is beneficial for applications that require precise optical alignment. The filter's coating, both on the front and back, is tho ne40a, an advanced coating technology known for its high absorption capabilities. This coating ensures an optical density of 4.0, making the NE540B ideal for applications that require significant light reduction.
The NE540B is currently in stock and available for immediate purchase through the Thorlabs website. For more information, including technical specifications and pricing, please refer to the provided weblink.