| 摘要 |
PURPOSE: A reflection type projector adopt a micro mirror driving device is provided to enhance a light separation structure by prevent a surface reflecting light reflected in a window surface of a micro mirror driving device from being projected toward not a screen. CONSTITUTION: A light source(110) creates and irradiates a light. A light path conversion unit(150) converts a progressing path of an incidence light. A micro mirror driving device(160) comprises a movable mirror, a post for rotatably supporting the movable mirror, and a window for protecting the movable mirror. A projection lens unit(170) expands and projects the incidence light. A color selection unit(120) is provided on a light path between the light source(110) and the light path conversion unit(150) for embodying a color image. A collimator lens(131) makes a light penetrating the color selection unit(120) be focused as a parallel light. A uniform light illumination unit(140) illuminates a uniform light to the micro mirror driving device(160). The light source(110) includes a lamp(111) and a reflecting light reflecting the light output from the lamp(111) and guiding a progressing path thereof. Reflecting members(M1, M2) change an optical path by considering the optical arrangement of the light source(110), the uniform light illumination unit(140), the light path conversion unit(150), a micro mirror driving device(160), and projection lens unit(170). The light path conversion unit(150) includes the first and second critical surfaces reflecting a light inputted as wider angle than the critical angle and refracting a light inputted as narrower angle than the critical angle and a light separating prism having an input/output surface penetrating an incidence light.
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