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| Coad | 669788 | Substrate | Neutral Filter Glass | |
| Type | Neutral Density Filter | OD | 0.1±0.005@550nm | |
| Diameter(mm) | 25.40 | Diameter Tolerance | +0.00/-0.25mm | |
| Clear Aperture | >90% | Parallelism | <10 arcsec | |
| Thickness(mm) | 1.20 | Thickness Tolerance | - | |
| Surface Quality | 40-20 | Wavelength(nm) | 400 - 650 | |
| Surface Flatness | - | FWHM | - | |
| Transmittance | - | Mechanical Housing | - | |
| Shell Diameter | - | Housing Diameter Tolerance | - | |
| Outer Shell Thickness | - | Operating Temperature | - | |
| Laser Damage Threshold | - | Transmission Wavefront Deviation | λ/4@633nm | |
| Coating Radial Angle | - | Coating Type | Uncoated | |
| Protective Chamfer | - | AOI | - | |
| Coating Specifications | - | |||
The optical density (OD) of LBTEK absorptive neutral density attenuators ranges from 0.1 to 8.0. They are available in two sizes: circular Ø25.4 mm and square 50.8 mm. The Ø25.4 mm version can be mounted on threaded sleeves or on a 30 mm coaxial mounting plate (OPM-12.5BS) for use within LBTEK’s coaxial systems. The 50.8 mm square version can be mounted using the filter holder (FHM1). Other opto-mechanical mounting options are also available.
The optical density (OD) of LBTEK absorptive neutral density attenuators ranges from 0.1 to 8.0, with a size of 1 inch. These attenuators are made from Schott glass substrates that provide stable absorption across the 400–650 nm wavelength range. All LBTEK circular lenses can be mounted in LBTEK standard lens sleeves, fixed lens holders, or various coaxial mounting plates. Customers can select the most suitable mounting method according to different application scenarios. Note: The thickness of absorptive neutral density filters is for reference only; the actual thickness depends on the optical density of the specific glass batch used.
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