| 摘要 |
PROBLEM TO BE SOLVED: To enable high-speed access, to reduce the thickness over the entire part of the device and to avoid the complication of a mechanism by providing the device with a microopening which generates proximity field light toward the recording surface of a recording medium and a light transmission means for introducing the light entering from a direction parallel with the recording surface to the microopening. SOLUTION: A mirror 4" is formed on one surface of a prism and a light shielding film 6 is formed on the other surface and the microopening 3" in the light shielding film 6 is formed. The light entering from the direction parallel with the moving direction of a slider is reflected by the inside surface of the prism (the boundary with the mirror 4"), is bent perpendicularly and arrives at the microopening 3", thereby generating the proximity field light near the outside of the microopening 3". A light source optical system is so fixed and arranged as to align the direction where the head moves and the optical axis of the parallel light beams emitted from the light source optical system. As a result, the light from the light source optical system arrives as the light from always the same direction at the optical head even when the optical head moves on the recording medium. The proximity field light is generated from the optical head at all times without moving the light source optical system. |
