Patent ID: 8807787

Claim:
An illumination device for illuminating a main illumination space and a sub illumination space, said illumination device comprising: a main illumination member configured to illuminate the main illumination space, a sub illumination member configured to illuminate the sub illumination space, a scotopic luminance of the main illumination member being defined by a product obtained by multiplying a spectral distribution property of said main illumination member by a scotopic sensitivity of said main illumination member, a photopic luminance of the main illumination member being defined by a product obtained by multiplying the spectral distribution property of said main illumination member by a photopic sensitivity of said main illumination member, a scotopic luminance of the sub illumination member being defined by a product obtained by multiplying a spectral distribution property of said sub illumination member by a scotopic sensitivity of said sub illumination member, a photopic luminance of the sub illumination member being defined by a product obtained by multiplying the spectral distribution property of said sub illumination member by a photopic sensitivity of said sub illumination member, a ratio of the scotopic luminance of the main illumination member to the photopic luminance of the main illumination member being defined as an S/P ratio of the main illumination member, a ratio of the scotopic luminance of the sub illumination member to the photopic luminance of the sub illumination member being defined as an S/P ratio of the sub illumination member, wherein said main illumination space corresponds to a space of a center portion of a field of view, said sub illumination space corresponding to a space of a peripheral portion of the field of the view, and a color of light of said main illumination member and a color of light of said sub illumination member are set such that the S/P ratio of the sub illumination member is set to be greater than the S/P ratio of the main illumination member.