69-179 12.5 mm Dia. Dichroic Shortpass Filter; t=1.05mm 550nm

The 69-179 is a Dichroic Shortpass Filter, boasting a 12.5 mm diameter and a thickness of 1.05mm, sourced from the reputable vendor Edmund Optics. This filter is designed to transmit wavelengths shorter than 550nm while reflecting longer wavelengths, making it ideal for various applications such as fluorescence microscopy, laser spectroscopy, and astronomical observations.

The filter's Dichroic properties are attributed to its unique coating, denoted as 'edm 69-179' on both the front and back surfaces. This coating ensures high transmission efficiency for shorter wavelengths and high reflection for longer wavelengths, thereby enhancing the performance of optical systems in which it is incorporated.

The 69-179 Filter features a Circular geometry, which is a common shape for optical elements due to its ease of alignment and integration into various optical systems. The filter's Base Shape is further classified as a Thin Lens, indicating its minimal thickness relative to its diameter, thereby reducing its impact on the overall optical path.

The filter's physical data includes a cut-on wavelength of 0nm and a cut-off wavelength of 550nm. This means that it begins to transmit light at 0nm and stops at 550nm, effectively blocking all wavelengths longer than this. This characteristic is crucial in applications where short wavelengths need to be isolated or emphasized.