Prism for digital viewfinder of video camera Prism for digital viewfinder of video camera

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prism for an optical view finder, which is easy to assemble and adjust, and in order to prevent images from being distorted in an optical viewfinder system, The beam splitter coating film 23 is formed so as to reflect the incident light 20% at an angle of 45 degrees with respect to the incident optical axis at a lower portion thereof. And a 45 total reflection coating film 21 which forms an angle of 45 with respect to the axis of the reflected light and transmits the incident light to the upper end surface. The incident surface 24 and the transmissive surface 25 prevent total internal reflection 20% of the incident light is reflected by the beam splitter coating film 23 of the beam splitter prism 20 in the direction of 90 DEG to the incident light to form a groove 26 of 45 DEG The overall cosmetic film 21 forms an optical view The grooves 26 formed on the incident surface 24 and the transmissive surface 25 are formed in such a manner that the light incident on the incident surface 24 and the light incident surface 24 are reflected by the beam splitter coating film 23, The optical viewfinder of the video camera prevents the ghost image or the flare phenomenon that may occur in the optical viewfinder 16 by blocking the light ray traveling in the total internal reflection on the transmitting surface 25,