Fig. 4
Projection views of the reconstructed round wedge prism in Fig. 3. (a) Top view. A, C, Cʹ, E, Eʹ, G, and Q are in the XY plane. φ is an angle formed between the principal section of the original round wedge prism and a section along an oblique meridian. The range of angle φ formed by OA and OC is \(\:0\le\:\phi\:<\frac{\pi\:}{2}\) and \(\:\frac{3\pi\:}{2}\le\:\phi\:<2\pi\:\). The range of angle φ formed by OA and OE is \(\:\frac{\pi\:}{2}\le\:\phi\:<\frac{3\pi\:}{2}\). (b) Side view of the reconstructed round wedge prism along the Y axis. O, A, B, Cʹ, Dʹ, Eʹ, Fʹ, G, and P are in the XZ plane. α0, apex angle in the principal section of the prism. (c) Side view of the oblique sections of the reconstructed round wedge prism. The range of angle φ formed by the principal section and the oblique section OCD is \(\:0\le\:\phi\:<\frac{\pi\:}{2}\) and \(\:\frac{3\pi\:}{2}\le\:\phi\:<2\pi\:\). The range of angle φ formed by the principal section and the oblique section OPFE is \(\:\frac{\pi\:}{2}\le\:\phi\:<\frac{3\pi\:}{2}\). αφ, apex angle of the prism in the oblique section.
