Camera and input/output device for camera

摘要

An external input/output device has a plug-in unit having the same shape as a photographic film cassette. The plug-in unit is insertable in a cassette chamber of a camera having a reflective photo-sensor for reading bar codes from a bar code disc of the photographic film cassette. The plug-in unit has a reflective photo-sensor whose light projecting element and photoelectric element are opposed to a photoelectric element and a light projecting element of the photo-sensor of the camera when the plug-in unit is inserted in the cassette chamber. After setting the camera in a data I/O mode, a keyboard of the input/output device is operated to enter control value data to be written in an EEPROM of the camera, or commands for monitoring control value data stored in the EEPROM. The data or command is inputted as light pulses in the camera through the light projecting element of the input/output device and the photoelectric element of the camera. The control value data from the EEPROM is outputted as light pulses to the input/output device through the light projecting element of the camera and the photoelectric element of the input/output device.