Appeal No. 2006-0386 Application 09/460,222 The third embodiment employs a single laser light source (32), a single photodetector (38), a beam splitter (34), two objective lenses (36, 46), and two controllable shutters (51, 52) for selecting the appropriate objective lens. Fourth embodiment – Figs. 9A-9B The fourth embodiment employs a single objective lens 46 and a wave front correcting lens 54, which is movable into and out of the light path between the beam splitter (34) and the objective lens (46). Fifth embodiment – Figs. 10-11 The fifth through eighth embodiments employ optical waveguide technology. The fifth embodiment employs two optical systems, each including, inter alia, a laser light source (63, 69), a beam splitter (66, 72), and converging grating coupler (65, 71), and a photodetector (68, 74). Sixth embodiment – Fig. 12 The sixth embodiment differs from the fifth by employing a single laser light source (63) plus an additional beam splitter (81). Seventh embodiment – Figs. 13-14 The seventh embodiment employs a single laser light source (63), a single photodetector (95), a single beam splitter (93), and a SAW (surface acoustic wave) transducer (91) for selecting the desired propagation angle between the beam splitter, 6Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NextLast modified: November 3, 2007