Projector of reflection type

A projector of a reflection type, including a transparent stage plate on which a transparent original sheet is set, a light source for illuminating said original sheet through said stage plate, a Fresnel mirror laid on an upside of said original sheet for reflecting light from said original sheet in a convergent manner, a mirror disposed under said stage plate and inclined for reflecting said light from said Fresnel mirror away from said stage plate, and a projecting lens upon which said light from said mirror is incident and which projects an image of said original sheet to a screen, said projector comprising:

• a housing for containing said Fresnel mirror in movable fashion;
• an inserting slot, formed in said housing, for inserting said original sheet into said housing during supply of said original sheet;
• a sheet detector for detecting a front edge of said original sheet inserted through said inserting slot;
• a position detector for detecting that said original sheet is set on said stage plate;
• an ejector switch operated for ejection of said original sheet;
• a mirror shifter, disposed in said housing, for shifting said Fresnel mirror from a set position to a raised position in response to a signal from said sheet detector or said ejector switch, and for shifting said Fresnel mirror from said raised position to said set position in response to a signal from said position detector, wherein said Fresnel mirror in said set position is laid on said original sheet, and said Fresnel mirror in said raised position is raised away from said stage plate;
• and
• a sheet feeder mechanism, disposed in said housing, for moving said original sheet from said inserting slot to said stage plate during said supply, and for moving said original sheet out of said housing during said ejection of said original sheet.