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Manufactures proposed those amount of winding mechanisms for small(middle)sized camera.At the beginning of camera production,roll-film winding perform a sprocket/perforations. rotation[35 mm,#135 film-type]or marker on leader paper by eye-measurement[60 mm. #120;40mm.#127 film-type].With the object of automatic camera operation,many invention were done,that is.build impress gear in camera body which rolled leader-paper surface. application of infrared diode sensor for film start position,detector of difference at film and leader paper reflection,and deflection system of film thickness at film start.Premagnetical recording marker on film edge and receptor of bar code on back lining for film position has taken rapid strides in modern camera exterior view.Moreover,winding operation system is shifting from knob or lever drive to D C step motor.The changes of film detector and of winding mechanisms make remarkable progress of camera system.Present reports explain on film winding processes and its performance test of typical camera types,experimentally.
Manufactures proposed that amount of winding mechanisms for small (middle) sized camera. At the beginning of camera production, roll-film winding perform a sprocket / perforations. Rotation [35 mm, # 135 film-type] or marker on leader paper by eye -measurement [60 mm. # 120; 40 mm. # 127 film-type] .With the object of automatic camera operation, many invention were done, that is. build impress gear in camera body which rolled leader-paper surface. application of infrared diode sensor for film start position, detector of difference at film and leader paper reflection, and deflection system of film thickness at film start. Premagnetical recording marker on film edge and receptor of bar code on back lining for film position has taken rapid strides in modern camera exterior view. Moreover, winding operation system is shifting from knob or lever drive to DC step motor. The changes of film detector and of winding mechanisms make remarkable progress of camera system .Present reportsextraction on film winding processes a nd its performance test of typical camera types, experimentally.