Such gratings can be either transmissive or reflective. Transflective LCDs combine the features of a backlit transmissive display and a reflective display. The E5-00 has a transmissive LCD display while the E-72 has a transflective LCD. Linear encoders may use transmissive (glass) or reflective scales, employing Ronchi or phase gratings. For a transmissive type, opaque stripes are printed on a transparent glass substrate. This can be improved by providing the partially transmissive mirror with a linearly decreasing reflectivity. First, the individual CFA filters are usually layers of transmissive (absorptive) organic or pigment dyes. The display surface can be reflective, transmissive, or a combination of both. This element describes the impedance of a finite-length diffusion with transmissive boundary. Reflectance pulse oximetry is a less common alternative to transmissive pulse oximetry. The input light is line-focused at the partially transmissive mirror on the light output side. The other method is to block the light (a transmissive LV).