New IR neutral density filters from Edmund Optics (EO; Barrington, NJ) exhibit excellent linearity and are spectrally flat over a wavelength range of 2 µm to 14 µm. Made from precision Germanium substrate, the filters are ideally suited for thermal and medical imaging. The broad spectral range makes these filters well-suited for eliminating hot spots in thermal images or attenuating a variety of IR laser sources, including CO2 and IR diode and quantum cascade lasers. The IR neutral density filters achieve attenuation via a metal alloy coating, which uses a combination of absorption and reflection to reach the stated transmittance value.
The new products are available in five densities and two size options. The IR ND Filters are available in both 25 mm or 50 mm diameter models with optical densities of 0.3, 0.5, 1.0, 2.0 and 3.0. IR Neutral Density Filter Kits are available in 25 mm diameter and 50 mm diameter versions. All five optical densities are also available as part of the EO Neutral Density Filter Kits.
The IR neutral density filters reportedly offer the broadest selection of densities in the industry. With no waiting for tooling or custom design, these products are in stock with immediate availability for fast prototyping and testing. Custom sizes and densities are available.
Edmund Optics is a leading producer of optics, imaging, and photonics technology for R&D, electronics, semiconductor, pharmaceutical, biomedical, and military markets around the globe. EO is the world's largest supplier of off-the-shelf optical components.
Posted by Laureen J. Belleville, [email protected] for BioOptics World.