ILLUMINATION UNIT, OPTICAL ENGINE, AND IMAGE PROJECTION DEVICE
PROBLEM TO BE SOLVED: To provide an illumination unit that can suppress an error in position of a group of optical elements with respect to an image creation element.SOLUTION: An illumination unit 20 comprises: a group of optical elements 22 to 25 that form a light path for guiding light from a ligh...
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Main Authors | , , , , , , , , , |
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Format | Patent |
Language | English Japanese |
Published |
09.03.2017
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide an illumination unit that can suppress an error in position of a group of optical elements with respect to an image creation element.SOLUTION: An illumination unit 20 comprises: a group of optical elements 22 to 25 that form a light path for guiding light from a light source to a DMD; and an illumination bracket 26 that holds the group of optical elements 22 to 25. A cylinder mirror 24, of the group of optical elements 22 to 25, is supported by support parts 262 to 264 formed integrally with the illumination bracket 26 and held by the illumination bracket 26. A concave mirror 25, of the group of optical elements 22 to 25, is supported by support parts 264 to 266 formed integrally with the illumination bracket 26 and held by the illumination bracket 26.SELECTED DRAWING: Figure 5A
【課題】画像生成素子に対する光学素子群の位置誤差を抑えることができる照明ユニットを提供する。【解決手段】照明ユニット20は、光源からの光をDMDに導く光路を形成する光学素子群22〜25と、光学素子群22〜25を保持する照明ブラケット26とを備える。光学素子群22〜25のうちシリンダミラー24は、照明ブラケット26に一体成形された支持部262〜264に支持されて照明ブラケット26に保持されている。また光学素子群22〜25のうち凹面ミラー25は、照明ブラケット26に一体成形された支持部264〜266に支持されて照明ブラケット26に保持されている。【選択図】図5A |
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Bibliography: | Application Number: JP20150174482 |