690DIB12 12.5 mm Dia. Standard Interference Bandpass Filter 690nm

The 690DIB12 is a 12.5 mm diameter Standard Interference Bandpass Filter, specifically designed to transmit light in the 690nm range. This filter is sourced from Knight Optical, a reputable vendor known for their high-quality optical components.

The filter is a Bandpass type, which means it allows light to pass through a specific range of wavelengths while blocking out other wavelengths. In this case, the cut-on wavelength is 685nm, and the cut-off wavelength is 695nm, making it highly efficient at filtering out unwanted wavelengths around the central 690nm wavelength.

The 690DIB12 is made from UVFS Mal-1965, a material known for its optical properties and durability. The filter has a thickness of 6.1mm, providing sufficient structural integrity for most applications. The coating on both the front and back surfaces of the filter is KNI 690DIB, which enhances its performance and durability.

The filter's geometry is that of a Thin Lens, which can be beneficial in certain optical systems where minimal optical path difference is desired. The 12.5mm diameter provides a good balance between light gathering capability and ease of integration into optical systems.

According to the vendor, this item is currently in stock and can be purchased directly from their website. The link to the product page is provided in the item data for your convenience.