PRISM AND OPTICAL DEVICE

Abstract: a prism includes an incidence plane, a reflection plane and an output plane, and changes a direction of travel of light and has a refractive index of n where n>1. in a case where the prism is viewed in a first direction, an angular difference between the incidence plane and the output plane is 90 degrees, the light input to the incidence plane travels in a second direction, the incidence plane extends to be directed more in the second direction from a position where the light is input, toward the output plane, and the following expression 1 is satisfied when an angular difference between a virtual plane orthogonal to the second direction and the incidence plane is � where �>0 degrees and an angular difference between the output plane and the reflection plane is x degrees.

Inventor(s): Atsushi KAJI, Atsushi IZAWA, Noritaka MATSUBARA, Kazuya NAGASHIMA, Yozo ISHIKAWA

CPC Classification: G02B5/04 (Prisms)

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