ACOUSTO-OPTICAL FILTER TYPE SPECTROSCOPIC CAMERA USING NON-SPECTROSCOPIC LIGHT IN FINDER SYSTEM

摘要

PROBLEM TO BE SOLVED: To obtain the same observation image as a photographing image of small azimuth difference without interrupting even during photographing in real time by photographing spectroscopic image using monochromatic light, and using light of wave length except it in a finder system. ;SOLUTION: A polarizer 3 converts parallel rays from a collimator lens 2 to light with orderly arranged polarized planes. An acousto-optical element 4 has an ultrasonic wave drive part 41 arranged on the position receiving light from the polarizer 3. A polarizing prism 5 is arranged on the position receiving out-going light from the acousto-optical element 4. Light of specific wavelength changing the polarization plane by the acousto-optical element 4 is converted to transmitting light, lights other than the light are converted to reflecting light to be separated from each other by difference of the polarization plane. A spectroscopic image optical system I forms a spectroscopic image by the use of separated monochromatic light. A finder optical system II inverts again the other light separated by the polarizing prism 5 by a prism or a plane mirror 6, and provides a monitor image conformed to the photographing image.;COPYRIGHT: (C)2001,JPO