Patent ID: 6212022
Filing Date: 2001-04-03
Classification: G02B

Abstract:
A beam shaping optical system, comprising a first and a second wedge prism, principal sections of said first and second wedge prisms being parallel with each other, wherein when a reference ray is incident on said first wedge prism and a skew ray, which has a same incident angle as said reference ray if projected on said principal section and inclined by an angle V with respect to said reference ray in a plane perpendicular to said principal section, a condition:.vertline..theta.8-.theta.'8.vertline.<0.100.degree.is satisfied,where, .theta.8 is an emission angle of said reference ray emitted from said second wedge prism in said principal section, and .theta.'8 is an emission angle of said skew ray emitted from said second wedge prism projected on said principal section, and .vertline.V.vertline.<10.degree..