论文部分内容阅读
“GBK”光学录音车是英国五十年代生产的电影光学录音设备,是混合磁底转录成光学声底的主要转光设备,在我国电影制片的后期制作中确实发挥过很大的作用,也有很多优点。但是,它也存在着片路运行稳定性差和声带中心位置的可重复性差等缺陷,这主要是由于限位涨轮和音鼓轮主轴的原设计不尽合理而造成的。音鼓轮上没有考虑到限位措施,只靠距曝光处较远的两个涨轮限位,由于这种结构,往往会受片路拉力变化和生胶片的几何尺寸等影响,使生胶片在曝光的瞬间,随其变化而产生轴向窜片,直接影响到光学混合声底的稳定性和声带位置的一致性及声带中心位置的可重复性。为此,对“GBK”音鼓轮主轴进行改制,重新设计并进行精密加工,以求彻底解决“GBK”光学录音车的稳定性问题。采用新改制的音鼓轮主轴录制的光学混合声底,彻底解决了“GBK”光学录音车的不稳定问题。
The “GBK” optical recording car is a film optical recording device produced in the 1950s in the United Kingdom. It is a main light converting device that transcribes a magnetic base into an optical soundtrack and has played a significant role in the post-production of film production in China. There are also many advantages. However, it also has some shortcomings such as poor stability of the film path and poor repeatability of the center of the vocal cords, which is mainly due to the unreasonable design of the limit roller and the drum drum main shaft. The drum drum does not take into account the limit measures, only by the distance from the exposure of two upstairs limit, due to this structure, often by film tension and the change of the geometric dimensions of raw film, so that raw film At the moment of exposure, axial channeling changes with its change directly affect the stability of the optical hybrid sound bottom and the consistency of the vocal cords and the repeatability of the center of the vocal cords. To this end, the “GBK” drum drum shaft restructuring, re-design and precision machining, in order to completely solve the “GBK” optical recording car stability issues. The optical hybrid soundtrack recorded with the newly remodeled sound drum wheel spindle completely solves the problem of instability of the “GBK” optical recording car.