FELH1150 Dia:25.0 mm Premium Longpass Filter; Cut-On Wavelength: 1150nm

The FELH1150 is a premium longpass filter manufactured by Thorlabs, a leading global supplier of photonics equipment. This filter, with a catalog number FELH1150, is designed with a diameter of 25.0 mm and a thickness of 3.5 mm, making it suitable for various optical applications.

The FELH1150 filter is a longpass filter, a type of optical filter that transmits wavelengths longer than a specified cut-on value while blocking shorter wavelengths. In this case, the cut-on wavelength is 1150nm, meaning it allows the transmission of wavelengths longer than 1150nm and blocks those shorter than this value. The cut-off wavelength, on the other hand, is 0nm, indicating that it does not block any wavelengths shorter than this value.

This filter is made from UVFS (UV Fused Silica), a material with the Mal-1965 material ID. The UVFS material is known for its excellent optical transmission, making it an ideal choice for applications that require high-quality optical filters.

The filter's coating, both on the front and back, is THo FELH01150. This coating enhances the filter's performance by ensuring efficient transmission of the desired wavelengths and blocking of unwanted ones.

The FELH1150 filter has a thin lens shape, which is a type of lens profile that is commonly used in optical systems. This shape allows for easy integration into various optical setups.

According to Thorlabs' website, the FELH1150 filter is currently in stock, indicating its availability for immediate purchase and delivery. The product's weblink is valid and provides direct access to the filter's product page on Thorlabs' website.