PARAMETER(3) | MIN | TYP | MAX | UNIT |
---|
Window material | | Corning Eagle XG | | |
Window aperture(1) | | | See (1) | |
Illumination overfill(2) | | | See (2) | |
Window transmittance, single-pass through both surfaces and glass (4) | Minimum within the wavelength range 390 nm to 450 nm, 0-30° AOI. | 93% | 99% | | |
Average within the wavelength range 390 nm to 450 nm, 0-30° AOI. | 98% | 99% | | |
Minimum within the wavelength range 450 nm to 550 nm. 0-30° AOI. | 75% | 90% | | |
(1) See the package mechanical characteristics for details regarding the size and location of the window aperture.
(2) The active area of the device is surrounded by an aperture on the inside of the DMD window surface that masks structures of the DMD device assembly from normal view. The window aperture is sized to anticipate several optical operating conditions. Overfill light directly illuminating the window aperture can create adverse imaging effects, and additional device heating leading to reduced device lifetime. Direct incident illumination should be prevented from striking the DMD window aperture.
(4) See the TI application report
DLPA031,
Wavelength Transmittance Considerations for DLP DMD Window.