PROJECTION OPTICAL SYSTEM, IMAGE PROJECTION DEVICE AND IMAGE PROJECTION SYSTEM
FIG5 is a configuration view of an image projection system in a first numerical example
Table 7 to Table 11 below show specific data of transmissive optical system 110 of a first numerical example. Note that a slow ratio of the first numerical example is 0.147. Projection magnification of the first numerical example is 178.75. Sizes of image display element 130 to be used are 9.856 mm in a long-side direction and 6.162 mm in a short-side direction. FIG5 is a configuration view of image projection device 10 and screen SC in the first numerical example. When viewed in an X direction perpendicular to the paper plane, screen SC is disposed to be parallel to optical axis AZ of the transmissive optical system.
view
5
conditional expression
10
image projection device
['2. The projection optical system according to claim 1, wherein the projection optical system satisfies a conditional expression (3) shown below,  θ \u2062 m 2 < θ \u2062 m 1  where θm1 is an angle formed by a normal line of the first reflecting surface at a position where the principal ray of the reference rays enters the first reflecting surface, and the principal ray of the reference rays.', '12. An image projection device comprising: the projection optical system according to any one of claims 1 to 11; and the image display element.']