Wavelength selective element, manufacturing apparatus for manufacturing wavelength selective element, manufacturing method for manufacturing wavelength selective element, light source device, image display device, and monitor

A manufacturing apparatus for manufacturing a wavelength selective element including light selective regions which include at least first light selective region and second light selective region, which are formed in a base member, and in which a predetermined selective wavelength is selected from the laser light emitted from a plurality of light emission elements, the manufacturing apparatus comprising:

• a light source that emits two exposure beams toward the light selective regions of the base member;
• and
• an incidence angle adjusting section that adjusts the incidence angle at which at least one of the two exposure beams is incident onto the light selective regions, and adjusts the two exposure beams so that the angle between the two exposure beams being incident onto the first light selective region is different from the angle between the two exposure beams being incident onto the second light selective region.

A manufacturing method for manufacturing a wavelength selective element including light selective regions which include at least first light selective region and second light selective region, which are formed in a base member, and in which a predetermined selective wavelength is selected from the laser light emitted from a plurality of light emission elements, the manufacturing method comprising:

• emitting two exposure beams to a light selective region of the base member;
• and
• adjusting two exposure beams so that the angle between the two exposure beams being incident onto the first light selective region is different from the angle between the two exposure beams being incident onto the second light selective region of the light selective regions.