Projection optical system and projection type display device
AssigneeFUJIFILM Corporation
InventorMasaru Amano
Life of this patent
Estimating the term…
Abstract
A projection optical system is constituted by, in order from the reduction side, a first optical system constituted by a plurality of lenses for forming an image displayed by image display elements as an intermediate image, and a second optical system constituted by a plurality of lenses for forming the intermediate image on a magnification side conjugate plane. Conditional Formula (1) below is satisfied. 8.20<Imφ·f2/f2<20.00 (1)
Claims15
A projection optical system that projects images displayed by image display elements provided on a reduction side conjugate plane onto a magnification side conjugate plane as a magnified image, consisting of, in order from the reduction side to the magnification side:
- a first optical system constituted by a plurality of lenses that forms the image displayed by the image display elements as an intermediate image;
- and
- a second optical system constituted by a plurality of lenses that focuses the intermediate image on the magnification side conjugate plane;
- in which Conditional Formula (1) below is satisfied:
- 8.20<Imφ·f2/f2<20.00 (1)
- wherein Imφ is an effective image diameter at the reduction side, f2 is a focal length of the second optical system, and f is a focal length of an entire projection optical system.
Dependencies are inferred from the claim text.