Head up display apparatus

A head up display apparatus, comprising:

• an image reflection surface that faces an observer and reflects display light toward the observer;
• a first image display element that outputs display light onto the image reflection surface;
• a second image display element that outputs display light onto the image reflection surface;
• images displayed by the first image display and the second display element being magnified and displayed beyond the image reflection surface as virtual images;
• the head up display apparatus further comprising:
• a greater distance optical system that displays a virtual image of the image displayed by the first image display element at a greater distance from the image reflection surface;
• a closer distance optical system having a power different from that of the greater distance optical system that displays a virtual image of the image displayed by the second image display element at a closer distance from the image reflection surface;
• and
• an optical filter having spectral properties that reflects light of a first wavelength band and transmits light of a second wavelength band that does not include the first wavelength band,
• the greater distance optical system and the closer distance optical system being arranged to have the optical filter interposed therebetween,
• the spectral properties being those in which wavelength bands for each of R (red), G (green), and B (blue) are divided into a plurality of sub wavelength bands,
• a wavelength band constituted by a combination of portions of each of the R, G and B sub wavelength bands is designated as a first RGB band,
• a wavelength band constituted by a combination of portions of sub wavelength bands different from the first RGB band is designated as a second RGB band, and
• one of the first RGB band and the second RGB band is reflected and the other is transmitted by the optical filter.