66-061 50.8 x 50.8 mm Hoya Y-50 Yellow Longpass Color Glass Filter 500nm

The 66-061 50.8 x 50.8 mm Hoya Y-50 Yellow Longpass Color Glass Filter is a specialized optical component designed for applications that require longpass filtering at 500nm. Sourced from the renowned optical vendor Edmund Optics, this filter is a part of their extensive catalog, boasting high-quality materials and precise manufacturing.

The filter is a square piece of color glass, with dimensions of 50.8 x 50.8 mm, providing a substantial surface area for beam incidence. It has a thickness of 2.5mm, ensuring robustness and stability during operation. The filter is designed with a Thin Lens shape, which is often preferred in optical systems due to its minimal impact on the beam path.

The Y-50 filter is a Longpass filter, meaning it allows transmission of wavelengths longer than the specified cut-on wavelength (500nm), while blocking shorter wavelengths. The physical data indicates a cut-on wavelength of 500nm and a cut-off wavelength of 0nm, suggesting that this filter is designed to block all wavelengths shorter than 500nm.

The filter's coating is another critical aspect of its design. Both the front and back surfaces are coated with EDM 66-039, a coating type not specified in the data. However, it can be assumed that this coating enhances the filter's performance, such as improving transmission, reducing reflection, or protecting the glass surface.