NE2R03B In Stock
Description: Unmounted Ø2" Absorptive ND Filter with 0.3 Optical Density
| Part Number | NE2R03B |
|---|---|
| Category | Optics |
| Manufacturer | ThorLabs |
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The NE2R03B by ThorLabs is a top-quality absorptive neutral density (ND) filter that offers superior performance in low-power applications. The NE2R03B boasts an optical density of 0.3, making it a popular choice among professionals seeking precision and accuracy in their work.
The NE2R03B's unique absorptive glass has been carefully engineered to reduce multiple reflections, resulting in exceptional optical performance. Designed with a Schott glass substrate, the NE2R03B offers a spectrally flat absorption coefficient in the visible region from 400 nm to 650 nm. However, it is important to note that there may be slight variations between different lots of glass, which is why it is recommended to calibrate each filter in a setup before taking quantitative measurements. Measuring Ø2" in size, the NE2R03B is round and unmounted, making it compatible with a range of lens tubes for easy and convenient use.
| Filter Size | Ø2" |
| Dimensional Tolerance | +0.0 / -0.25 mm (Diameter) |
| Clear Aperture | >Ø45.7 mm |
| Surface Quality | 40-20 Scratch-Dig |
| Parallelism | <10 arcsec |
| Transmitted Wavefront Error (For OD < 1.3) | <λ (@ 633 nm) |
| CW Damage Threshold | 25 W/cm (532 nm, Ø1.0 mm) |
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Warranty:
Refurbished - 2 year warranty
New Surplus - 3 year warranty