Patent ID: 8072666

Claim:
An optical scanning device comprising: an oscillating mirror portion which has an oscillatable reflection surface; a frame portion which holds the oscillating mirror portion; and a reflection portion made of a light transmitting material which is arranged at a position where the reflection portion faces the reflection surface of the oscillating mirror portion, the reflection portion having a first reflection surface and a second reflection surface which form approximately V-shaped inclined surfaces, wherein the first reflection surface and the second reflection surface are formed on an approximately V-shape concave portion which is formed on a first side of the reflection portion, the first side being opposite to a second side of the reflection portion which faces the oscillating mirror portion, the first reflection surface is configured to reflect an incident optical flux which enters the inside of the reflection portion toward the oscillating mirror portion, and the second reflection surface is configured to receive a reflected light which is formed by reflection of the incident optical flux on the oscillating mirror portion and enters the inside of the reflection portion and to radiate the reflected light as a scanned optical flux, whereby the incident optical flux is converted into the scanned optical flux by oscillations of the reflection surface.