| 发明名称 |
PROJECTION DEVICE AND PROJECTION SYSTEM |
| 摘要 |
A projection device to magnify and project, on a screen, an image displayed at an image display element, includes: a dioptric system including at least one positive lens and at least one negative lens; and a reflection optical system having at least one reflection optical element. |
| 申请公布号 |
US2015370048(A1) |
申请公布日期 |
2015.12.24 |
| 申请号 |
US201514742967 |
申请日期 |
2015.06.18 |
| 申请人 |
TAKANO Yohei |
发明人 |
TAKANO Yohei |
| 分类号 |
G02B13/16;G02B13/00;G03B21/28;G03B21/14;G03B21/00;G03B21/56 |
主分类号 |
G02B13/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A projection device configured to magnify and project, on a screen, an image displayed at an image display element, the projection device comprising:
a dioptric system including at least one positive lens and at least one negative lens: and a reflection optical system having at least one reflection optical element, wherein the at least one positive lens and the at least one negative lens satisfy the conditional expressions (1) and (2):
−6<dnT (1)70<vd (2) where dnT denotes a temperature coefficient of a relative refractive index at a D line in a range of 40 to 60 degrees, and vd denotes an Abbe number. |
| 地址 |
Kanagawa JP |
