document.write("<table WIDTH=\"100%\" BORDER=\"0\" CELLPADDING=\"0\" CELLSPACING=\"0\" ALIGN=\"CENTER\"><tr><TD VALIGN=\"TOP\" CLASS=\"foot-bg\"><BR><table WIDTH=\"98%\" BORDER=\"0\" CELLPADDING=\"0\" CELLSPACING=\"0\" ALIGN=\"CENTER\" CLASS=\"foot-tab\"><TR><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html\">Optical Prisms</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#optical-windows\">Optical Windows</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#optical-mirrors\">Optical Mirrors</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#optical-flats\">Optical Flats</A></TD></TR><TR><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#optical-parallels\">Optical Parallels</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#laser-interferometer\">Laser Interferometer</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#fizeau-interferometer\">Fizeau Interferometer</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#michelson-interferometer\">Michelson Interferometer</A></TD></TR><TR><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#autocollimator\">Autocollimator</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#interference-autocollimator\">Interference Autocollimator</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#alignment-autocollimator\">Alignment Autocollimator</A></TD><TD WIDTH=\"25%\" CLASS=\"foota\" ALIGN=\"CENTER\"><A HREF=\"optical-instruments.html#monochromatic-light-source\">Monochromatic Light Source</A></TD></TR></table><BR></TD></tr></table>");