The 87-029 is a Dichroic Longpass Filter, boasting a 12.5 mm diameter and a thickness of 1.05mm, sourced from the reputable optical vendor, Edmund Optics. This filter is designed to transmit light with wavelengths above a specified value while reflecting or absorbing shorter wavelengths.
The filter's primary function is centered around the 1050nm wavelength, making it ideal for applications that require the separation of infrared light. The 'longpass' characteristic implies that it allows transmission of longer wavelengths, while effectively blocking or reflecting shorter wavelengths.
The filter's physical dimensions are equally noteworthy. With a diameter of 12.5mm, it offers a substantial surface area for light transmission, making it suitable for various optical systems. The thickness of 1.05mm ensures durability and rigidity, while also minimizing optical distortions.
The filter's coating is another critical aspect. Both the front and back surfaces are coated with 'edm 87-029', a proprietary coating developed by Edmund Optics. This coating enhances the filter's performance, ensuring efficient light transmission and blocking of unwanted wavelengths.