{TAIL ~ The superposing optical system} has a first superposing lens disposed between the second lens array and the color separating and guiding optical system and {HEAD ~ a second superposing lens} having a convex lens included in the color separating and guiding optical system 
{ TAIL ~ The superposing optical system } has a first superposing lens disposed between the second lens array and the color separating and guiding optical system and { HEAD ~ a second superposing lens } having a convex lens included in the color separating and guiding optical system
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