JP2019074706A - レーザ投射装置 - Google Patents
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- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
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- G—PHYSICS
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
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- G—PHYSICS
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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Abstract
Description
図1〜図6は本発明の実施の形態1を示す。
図7(a)は、本発明の実施の形態2におけるレーザ投射装置を示す。図1と同じ構成要素については同じ符号を用い説明を省略する。
202 拡散板
203 拡散板の入射面の溝
204 拡散板の出射面の溝
205 筐体
241 コリメートレンズ
Claims (16)
- レーザ光源と、
前記レーザ光源の射出光を入射光とし、入射面または出射面に直線状の複数の溝を配列した拡散板と、
前記レーザ光源の射出方向に前記溝により拡散した光を射出する開口部を有した光を透過しない筐体とを備えた、
レーザ投射装置。 - レーザ光源と、
互いに対抗する入射面と出射面および入射面と出射面の間に側面が配置され、前記レーザ光源の射出光を入射面より入射し、前記出射面に配置され前記入射面の入射光を反射させる第1全反射面、および前記側面に配置され前記第1全反射面の反射光を再び反射させ平行光化させる第2全反射面が形成され、
前記第2全反射面の射出光を前記出射面より射出するコリメートレンズと、
前記コリメートレンズの射出光を入射光とし入射面または出射面に直線状の複数の溝を配列した拡散板と、
前記レーザ光源の射出方向に前記拡散板の前記溝により拡散した光を射出する開口部を有した光を透過しない筐体とを備えた、
レーザ投射装置。 - 前記レーザ光源は、複数の半導体レーザが近接して配列された、
請求項1または請求項2記載のレーザ投射装置。 - 前記拡散板の複数の溝は、断面が4つの曲面状の溝斜面で構成され隣接する溝斜面は接続点において傾斜角がほぼ等しくなるように接続された、
請求項1または請求項2記載のレーザ投射装置。 - 前記拡散板の複数の前記溝の1つの溝を、
第2溝斜面に第3接続点で接続された第3溝斜面とで構成される凹形状と、前記第2溝斜面に第2接続点で接続された第1溝斜面で形成される第1凸形状と、前記第3溝斜面に第4接続点で接続された第4溝斜面で形成される第2凸形状とで構成し、
前記第1溝斜面または前記第4溝斜面の前記凸形状の高さは、前記第2溝斜面と前記第3溝斜面で形成される前記凹形状の高さよりも高いまたは等しい、
請求項4記載のレーザ投射装置。 - 前記拡散板の複数の前記溝の1つの溝を、
第2溝斜面とこの第2溝斜面に第3接続点で接続された第3溝斜面とで構成される凹形状と、前記第2溝斜面に第2接続点で接続された第1溝斜面で形成される第1凸形状と、前記第3溝斜面に第4接続点で接続された第4溝斜面で形成される第2凸形状とで構成し、
前記第2接続点で接続された前記第2溝斜面から前記第1溝斜面の高さと、
前記第4接続点で接続された前記第3溝斜面から前記第4溝斜面の高さとは、
拡散板中央側の溝斜面の高さが、周辺側の溝斜面の高さより高い、
請求項4記載のレーザ投射装置。 - 前記拡散板の複数の前記溝の1つの溝を、
第2溝斜面とこの第2溝斜面に第3接続点で接続された第3溝斜面とで構成される凹形状と、前記第2溝斜面に第2接続点で接続された第1溝斜面で形成される第1凸形状と、前記第3溝斜面に第4接続点で接続された第4溝斜面で形成される第2凸形状とで構成し、
凹形状の前記第2溝斜面と凸形状の前記第1溝斜面との接続点における傾斜角と、
凹形状の前記第3溝斜面と凸形状の前記第4溝斜面との接続点における傾斜角は、
拡散板中央側の傾斜角が、拡散板周辺側の傾斜角より等しいか小さい、
請求項4記載のレーザ投射装置。 - 前記拡散板の複数の前記溝の断面における溝斜面の形状は非球面形状である、
請求項4記載のレーザ投射装置。 - 前記拡散板の複数の前記溝は、溝ピッチが0.1mm以上で隙間なく配列している、
請求項4記載のレーザ投射装置。 - 前記拡散板の厚みは、0.2mm以上である、
請求項4記載のレーザ投射装置。 - 前記拡散板の複数の前記溝の形状は、断面が一定の押し出し形状である、
請求項4記載のレーザ投射装置。 - 前記拡散板は、入射面と出射面のそれぞれに複数の溝が配置され、入射面の前記溝の溝方向と出射面の前記溝溝方向とは互いに直交している、
請求項1または2に記載のレーザ投射装置。 - 前記拡散板の前記溝の溝ピッチに対する溝深さの比が、出射側より入射側の方が大きいまたは等しい、
請求項12記載のレーザ投射装置。 - 前記拡散板の出射面の前記溝の形成部の大きさが入射面の溝の形成部の大きさより大きい、
請求項12記載のレーザ投射装置。 - 前記コリメートレンズの前記第1全反射面では入射光をほぼ直角に光路を曲げ、前記第2全反射面では再び光路をほぼ直角に曲げる、
請求項2記載のレーザ投射装置。 - 前記コリメートレンズの出射面は、凹の円錐形状である、
請求項15記載のレーザ投射装置。
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JP2017202297A JP6945180B2 (ja) | 2017-10-19 | 2017-10-19 | レーザ投射装置 |
EP18196119.4A EP3474047A1 (en) | 2017-10-19 | 2018-09-21 | Laser projection device |
US16/139,270 US20190121154A1 (en) | 2017-10-19 | 2018-09-24 | Laser projection device |
CN201811186416.1A CN109683326A (zh) | 2017-10-19 | 2018-10-11 | 激光投射装置 |
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WO2022224706A1 (ja) * | 2021-04-19 | 2022-10-27 | 株式会社小糸製作所 | 車両用灯具 |
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JP7349655B2 (ja) * | 2019-05-28 | 2023-09-25 | パナソニックIpマネジメント株式会社 | 投射装置 |
CN114258509B (zh) * | 2019-09-19 | 2024-02-09 | 松下知识产权经营株式会社 | 投射光学系统以及雷达装置 |
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- 2018-09-24 US US16/139,270 patent/US20190121154A1/en not_active Abandoned
- 2018-10-11 CN CN201811186416.1A patent/CN109683326A/zh active Pending
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CN109683326A (zh) | 2019-04-26 |
JP6945180B2 (ja) | 2021-10-06 |
US20190121154A1 (en) | 2019-04-25 |
EP3474047A1 (en) | 2019-04-24 |
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