Optomagnetic recording and reproducing device

Abstract

Abstract PURPOSE:To attain miniaturization by using a polarized beam splitter comprising a triangle prism, a collimated plate or a wedge plate, a polarized film and a full reflection film as an analyzer. CONSTITUTION:The polarized film 12 of a polarized beam splitter 9 is a vapor- deposition film reflecting abnormal polarized light and transmitting a normal polarized light and the full reflection film 14 is a vapor-deposition film reflecting the normal polarized light. Through the constitution above, the plate thickness of the collimated plate 13 is brought into a prescribed thickness to provide a prescribed separation width to the abnormally polarized light and the normal polarized light for separation. In this example, a right angle prism 11 is used but a triangle prism with an optional angle (not necessarily right angle) is used to change the irradiation direction and the edge of the triangle prism at which no light is transmitted can be cut off. Further, the wedge plate is used in place of the collimated plate 13 to change the separation width between the abnormally polarized light and the normally polarized light.

Inventors

• 👤 Masaaki Kiyono
• 👤 清野　正明
• 👤 Mitsuru Fujita
• 👤 満 藤田

Bibliographic Details