| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide device that can maintain the light guide performance in a light guide part in good condition while providing a hard coat layer for protection, a virtual image display device using the light guide device, and a manufacturing method of the light guide device.SOLUTION: A light guide device 20 suppresses the level difference between both optical surfaces OS1 and OS2 at a connection part CT to 1 mm or less, so as to prevent the formation of a large level difference part at the connection part CT during the deposition of a hard coat, and thereby suppressing the occurrence of the retention and dripping of a coat liquid CL, which flows on parts to be both optical surfaces OS1 and OS2. With this configuration, the light guide device 20 can maintain the light guide performance in a light guide part in good condition. |
