Film position detecting device, film image display device and movie film recording device

A film image display device for carrying a movie film intermittently by connecting a film running device with a plurality of perforations formed on said movie film in the longitudinal direction and for displaying the transmitted light of said movie film to a predetermined projection object by irradiating the light source light from the light source to the fixed area of said movie film at the stop position of said movie film for each intermittent forwarding, said film image displaying device comprising:

• the first and second guide means for holding said movie film driven by said film running device from both sides and on which window holes for transmitting the light source light or the image light to the fixed area of said movie film are formed;
• the plural number of electrodes provided in said first guide means facing, at least, one of the edges of said movie film containing said perforations;
• a band shaped conducting material provided in said second guide means facing said electrodes having said movie film between;
• position detecting means for detecting the stop position of said movie film with respect to said window holes, based on the amount of change of each electrostatic capacity of a plurality of condensers which are formed making said electrodes and said band shaped conducting material as pole plates respectively and the thickness of said movie film as the distance of said pole plates, said amount of change of electrostatic capacity changing depending on the displacement rate of the stop position of said movie film for each intermittent forwarding;
• and
• optical axis correcting means, which is provided on an optical axis of the transmitted light of said movie film, for correcting an optical axis of the transmitted light of said movie film in order to control the sway of image displayed on said projection object in accordance with the output of said position detecting means.

A movie film recording device for carrying a movie film intermittently by connecting a film running device with a plurality of perforations formed on said movie film in the longitudinal direction, and for recording images on said movie film based on a predetermined image light by irradiating said image light to the fixed area of said movie film at the stop position of said movie film for each intermittent forwarding, said movie film recording device comprising:

• the first and second guide means for holding said movie film driven by said film running device from both sides and on which window holes for transmitting the light source light or the image light to the fixed area of said movie film are formed;
• the plural number of electrodes provided in said first guide means facing, at least, one of the edges of said movie film containing said perforations;
• a band shaped conducting material provided in said second guide means facing said electrodes having said movie film between;
• position detecting means for detecting the stop position of said movie film with respect to said window holes, based on the amount of change of each electrostatic capacity of a plurality of condensers which are formed making said electrodes and said band shaped conducting material as pole plates respectively and the thickness of said movie film as the distance of said pole plates, said amount of change of electrostatic capacity changing depending on the displacement rate of the stop position of said movie film for each intermittent forwarding;
• and
• optical axis correcting means, which is provided on an optical axis of said predetermined image light, for correcting an optical axis of said image light in order to control the sway of image recorded on said movie film in accordance with the output of said position detecting means.