| 摘要 |
PURPOSE: To prevent non-modulation light from reaching a view surface by providing a light reflection film consisting of a window that matches a device and whose center is not coated under a light transmission glass cover. CONSTITUTION: A light transmission glass cover 42 is placed on a device 10. The cover 42 nearly matches the outer-periphery part of a sealing 70. The lower surface of the cover 42 can support an annular light reflection film 60. The film 60 constitutes a window 80, whose center is not covered, that matches the device 10. An annular groove 54 is formed inside the lower part of the cover 42, and the film 60 is provided in the groove 54. The groove 54 and the film 60 itself are mounted to nearly the inner periphery part of the sealing 70 and at a periphery part on the mounting surface. The groove 54 preferably has a triangular section and has an outer wall 56 that is nearly vertical to the wall surface and an inner wall 58 that is separated from the outer wall 56 and is inclined. Also, a device 90 for sealing the outer part on the lower surface of the cover 42 to the sealing 70 is provided. |
