39-334 12.5 mm Dia. Hard Coated OD 4.0 5nm Bandpass Filter; t=3.5 mm 785nm

The 39-334 is a Bandpass Filter with a diameter of 12.5 mm, sourced from the reputable optical components vendor, Edmund Optics. This filter is specifically designed for a central wavelength of 785nm, making it ideal for applications that require precise wavelength selection within this range.

The filter is hard coated, which enhances its durability and resistance to wear and tear, ensuring longevity and reliable performance. The OD (Optical Density) is 4.0, indicating a high level of attenuation for wavelengths outside the passband. This is particularly beneficial in applications where stray light or unwanted spectral components need to be minimized.

The physical data of the filter includes a cut-on wavelength of 782.5nm and a cut-off wavelength of 787.5nm. This narrow bandpass is achieved through the use of high-quality coatings on both the front and back surfaces, designated as 'edm 39-334'. These coatings are designed to maximize transmission within the passband while minimizing it outside this range.

The filter has a thickness of 3.5 mm and a circular shape, which is a common form factor for optical components due to its ease of integration into various systems. The geometry of the filter, combined with its specific coatings, makes it a versatile tool for a wide range of optical applications.