Reflecting element, light deflecting device, image projection device, optical writing device, object recognition device, mobile object, and head-mounted display

A reflecting element comprising:

• a first reflecting film to reflect light;
• and
• a second reflecting film to increase a reflectivity of the first reflecting film,
• the second reflecting film including at least one layer of high-refractive-index material and a plurality of layers of low-refractive-index material with a refractive index lower than that of the at least one layer of high-refractive-index material,
• wherein one of the plurality of layers of low-refractive-index material being a top layer of the second reflecting film has a thickness of 20 nm or less and a refractive index of lower than 1.65, and
• a thickness of each of the at least one layer of high-refractive-index material and the plurality layers of low-refractive-index material except the top layer of the second reflecting film is larger than a thickness of the first reflecting film.