Chapter 7
Single-Beam Denisyuk Techniques
Oh, Kitty, how nice it would be if we could only get through into Looking-glass House! I’m sure it’s got, oh! Such beautiful things in it! Let’s pretend there’s a way of getting through it, somehow, Kitty…
Lewis Carroll
Through the Looking-Glass
In the previous chapter, we showed how to make a simple Denisyuk (“single beam”) hologram, and perhaps you have now made one for yourself. This chapter looks into this technique more deeply and also shows ways of making copies of Denisyuk holograms. The term “single beam” can easily convey a wrong impression; as a hologram is based on a stationary interference pattern, there must be two beams to create it. So where does the second beam come from? In this chapter, ...
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