To project a desired projection pattern E onto an illumination object surface U, such as a road surface, and displace it on the illumination object surface U.SOLUTION: Each of laser beams L1 generated by respective laser light sources 110 of three primary colors R, G, and B is widened by a corresponding magnifying lens 120 to generate a corresponding divergent light ray L2, and then it is formed into a corresponding parallel illumination light ray L3 by a corresponding collimator lens 130 and allowed to be incident on an incidence surface Q of a single diffraction optical element 140RGB in which a hologram image is recorded. Diffraction light rays L4RGB from the diffraction optical element 140RGB form a projection pattern E as a hologram reproduction image on an illumination object surface U. A collimator lens 130B is moved by a collimator lens drive part 150B, and the projection pattern E is thereby displaced on the illumination object surface U. The collimator lens drive part 150B moves the collimator lens 130B in such a manner that an illumination area AB of the parallel illumination light ray formed on the incidence surface Q is prevented from extending off a hologram-forming surface on the incidence surface Q.SELECTED DRAWING: Figure 4
【課題】路面等の照明対象面U上に所望の投影パターンEを投影し、これを照明対象面U上で変位させる。【解決手段】3原色R,G,Bの各レーザ光源110が発生させた各レーザビームL1を各拡大レンズ120で拡幅して各発散光L2を生成し、これを各コリメートレンズ130によって各平行照明光L3に整形して、ホログラム像が記録された単一の回折光学素子140RGBの入射面Qに入射させる。回折光学素子140RGBからの回折光L4RGBは、照明対象面U上に、ホログラム再生像として投影パターンEを形成する。コリメートレンズ駆動部150Bによって、コリメートレンズ130Bを移動させ、投影パターンEを照明対象面U上で変位させる。コリメートレンズ駆動部150Bは、入射面Q上に形成される平行照明光の照射領域ABが、入射面Q上のホログラム形成面から食み出すことがないように、コリメートレンズ130Bを移動させる。【選択図】図4
ILLUMINATION DEVICE
照明装置
2019-06-13
Patent
Electronic Resource
Japanese
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / G03H Holografische Verfahren oder Vorrichtungen , HOLOGRAPHIC PROCESSES OR APPARATUS |
ILLUMINATION DEVICE, AUTOMOBILE EQUIPPED WITH ILLUMINATION DEVICE
European Patent Office | 2016
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