Until some years ago, if we talk about “Color TV Camera”, it meant a large-size camera at studio in broadcasting station. However, it has just led to mass-production of portable color TV camera with very rapid development under recent advanced technology of its miniaturization.
It is worthy of our notice that improvement of manufacturing technology of dichroic mirror consisting of multi thin films by vacuum evaporation technology contributed to the miniaturization, as well as advances of electronics.
Technical history of dichroic mirror started from soft dichroic mirror of ZnS+MgF
2- Then, many experiences, included control technology for film thickness, taken at the process have produced the manufacturing technology of hard dichroic for the present stripe filter.
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