The 1st prism which has the reflecting interface which administers the dichroic

摘要

PROBLEM TO BE SOLVED: To prevent a red light component from being left in green light and to suppress near infrared by suppressing the transmissivity of a reflection zone of a dichroic film, which reflects the corresponding red light of a 2nd prism, below a specific value and arranging a near-infrared suppression dichroic film on the projection side of a 3rd prism. ;SOLUTION: Luminous flux 5 from a body which has passed through an objective L is made incident on an incidence surface 1a of a blue separation prism 1 and blue light, reflected by a blue reflecting dichroic film on a reflecting surface 1b of the blue separation prism 1, of the incident luminous flux is totally reflected by the incidence surface 1a to impinge on an image pickup element 4B. Red light, reflected by a red reflecting dichroic film on a reflecting surface 2b of a red separation prism 2, of the light having passed through a reflecting surface 1b of the blue separation prism 1 is totally reflected by an incidence surface 2a to be made incident on an image pickup element 4R. Green light having passed through the reflecting surface 1b of the blue separation prism 1 and the reflecting surface 2b of the red separation prism 2 passes through a green separation prism 3 and is made incident on an image pickup element 4G.;COPYRIGHT: (C)2001,JPO