| 摘要 |
A reflection type optical device comprises a transparent base member having an incident light receiving surface, at least a reflection surface for internally reflecting the incident light and a light emitting surface for emitting the reflected light. A dielectric layer is formed on each of the incident light receiving surface and the light emitting surface, and a metal layer is formed on all the remaining surfaces of the transparent base member other than the incident light receiving surface and the light emitting surface.
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