Figure 1-6.
Dichroic mirror system
(2) The prism block.
Because the dichroic mirror system is so
critical in its alignment and therefore, quite vulnerable to physical shock,
most cameras, especially the ENG/EFP cameras, use as their internal optical
system the prism block. The incoming light is separated and directed to the
pickup tubes by prisms and color filters. Since prism blocks soak up less
light than dichroic mirrors, they are used in high quality cameras (fig 1-
7).
Figure 1-7.
The prism block system
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