| 发明名称 |
VARIABLE MAGNIFICATION PROJECTION OPTICAL SYSTEM AND PROJECTION DISPLAY APPARATUS |
| 摘要 |
A variable magnification projection optical system substantially consisting of two lens groups of a first lens group having a positive refractive power and is moved during magnification change, and a second lens group having a positive refractive power and is moved during magnification change, in which the variable magnification projection optical system is configured such that the reduction side is telecentric. |
| 申请公布号 |
US2015070778(A1) |
申请公布日期 |
2015.03.12 |
| 申请号 |
US201414540279 |
申请日期 |
2014.11.13 |
| 申请人 |
FUJIFILM Corporation |
发明人 |
AMANO Masaru |
| 分类号 |
G02B13/22;G02B15/14 |
主分类号 |
G02B13/22 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A variable magnification projection optical system, substantially consisting of two lens groups of a first lens group having a positive refractive power and a second lens group having a positive refractive power, disposed in order from the magnification side, wherein:
the first lens group is moved to the magnification side and the second lens group is moved to the reduction side during magnification change from the wide angle end to the telephoto end; and the variable magnification projection optical system is configured such that the reduction side is telecentric. |
| 地址 |
Tokyo JP |
