Projection-type image display device and projection-type image display system

摘要

A projection-type image display device includes an image light generator (40) configured to generate image light, a projection optics configured to project the image light onto a screen (11). The projection optics includes a reflection mirror (50) configured to reflect the image light toward the screen, the image light outputted from the image light generator (60). A projection-type image display device includes a protective cover (160) provided on an optical path of the image light reflected by the reflection mirror (50). The protective cover (160) has a transmissive region (161) transmitting the image light reflected by the reflection mirror (50).