An optical disk recording apparatus includes a first comparator, a second comparator, a third comparator, a selection circuit, a control voltage generator, a voltage control oscillator, and a control circuit. The apparatus for manufacturing an optical device performs mutual position adjustment of three liquid crystal panels, which are to be fixed to a cross dichroic prism. The heating element and the foam portions can be at least partially enclosed in a fluid-resistant cover. The first metrology site is formed by placing a relatively small horizontal surface area trench within a relatively large surface area field of a polish stop material.