Absorptive Neutral Density Filter, Operating Wavelength Band: 1000-1700 nm OFA14-40
JCOPTIX near-infrared absorptive ND filters provide uniform attenuation by absorption over the long near-infrared band of 1000-1700 nm. Varying glass-substrate type and thickness produces the complete series; actual thickness depends on the optical density of the glass batch. Optical Density (OD) is the attenuation factor, expressing how strongly a filter attenuates incident intensity. Its relation to transmittance T is T=10⁻OD, where T lies between 0 and 1. Higher OD means lower transmission and higher absorption. Densities add: stacked filters have a total OD equal to their individual sum. Slightly tilt filters relative to incident beams to avoid harmful etalon interference. Contact technical support for other sizes or shapes. Absorptive ND filter wheel kit, operating wavelength: 1000-1700 nm. Model: OFA14-M1. Uniform attenuation over 1000-1700 nm. OD range: 1.0-6.0, with 6 options. Compatible with 30 mm coaxial systems. Blind rod holes protect filters. JCOPTIX near-infrared absorptive filters provide uniform attenuation by absorption over 1000-1700 nm. Varying glass type and thickness produces the complete series. Slight tilt avoids harmful etalon interference. The preassembled kit mounts six filters with OD=1.0, 2.0, 3.0, 4.0, 5.0, and 6.0 in a standard 30mm coaxial MCW6 filter wheel. The top of each filter mounting tube is laser-marked with its OD for quick identification. Mounted absorptive ND filter kit. Model: OFK5. Uniform broadband attenuation. OD coverage: 0.1-8.0. For low- to medium-power lasers. JCOPTIX absorptive ND filters provide uniform broadband attenuation through absorption. Changing glass type and thickness produces the full series. Slightly tilt filters to avoid harmful etalon interference.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical element material | Neutral-density filter glass |
| Dimensions | Ø25.4 mm |
| Thickness | 2 mm |
| Clear Aperture Dimension | >90% of Outer Diameter |
| Operating Wavelength Band | 1000-1700 nm |
| Optical density (OD) value | 4.0 |
| Dimensional Tolerance | +0.0/-0.25 mm |
| Coating | Uncoated |
| Surface Flatness [@633 nm] | < λ |
| Surface parallelism | < 30 arcsec |
| Surface quality (scratch/dig) | 60/40 |
| Optical Density Tolerance [@ 1300 nm] | 4.0 ± 0.20 @ 1300 nm |
Key Features
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