![自动聚焦设备、投影透镜设备以及图像投影装置](/CN/2013/1/112/images/201310560150.jpg)
基本信息:
- 专利标题: 自动聚焦设备、投影透镜设备以及图像投影装置
- 专利标题(英):Auto-focus device, projection lens device, and image projection apparatus
- 申请号:CN201310560150.3 申请日:2013-11-12
- 公开(公告)号:CN103809355A 公开(公告)日:2014-05-21
- 发明人: 土屋聪 , 山田正道 , 御沓泰成 , 难波英男 , 金井秀雄 , 石川直行 , 池田素久
- 申请人: 株式会社理光
- 申请人地址: 日本东京都大田区中马込一丁目3番6号
- 专利权人: 株式会社理光
- 当前专利权人: 株式会社理光
- 当前专利权人地址: 日本东京都大田区中马込一丁目3番6号
- 代理机构: 上海市华诚律师事务所
- 代理人: 徐申民; 肖华
- 优先权: 2012-249625 2012.11.13 JP
- 主分类号: G03B21/53
- IPC分类号: G03B21/53 ; G03B21/00 ; G02B7/09
An auto-focus device includes: a light projection lens unit that projects light emitted from a light source unit, on a projection target surface; a light receiving unit that receives a diffusely-reflected light from the projection target surface; a light receiving lens unit that guides the diffusely-reflected light to the light receiving unit; a calculating unit that calculates a focal distance to the projection target surface from the diffusely-reflected light; a first holding unit that holds the light source unit, the light projection lens unit, and the light receiving lens unit; a second holding unit that holds the light receiving unit, and is mounted on the first holding unit; and a pressing unit that presses the second holding unit against the first holding unit. The second holding unit is configured to be displaceable on a surface of the first holding unit along a groove portion formed thereon. The invention further relates to a projection lens device and an image projection apparatus.
公开/授权文献:
- CN103809355B 自动聚焦设备、投影透镜设备以及图像投影装置 公开/授权日:2016-03-30
IPC结构图谱:
G | 物理 |
--G03 | 摄影术;电影术;利用了光波以外其他波的类似技术;电记录术;全息摄影术 |
----G03B | 摄影、放映或观看用的装置或设备;利用了光波以外其他波的类似技术的装置或设备;以及有关的附件 |
------G03B21/00 | 放映机或放映式看片机;有关附件 |
--------G03B21/14 | .零部件 |
----------G03B21/53 | ..自动聚焦装置,例如,为补偿热效应的自动聚焦装置 |