Importance

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Abstract

An optical head device which has an optical element and an optical fiber. The optical element is made of a material with a high refractive index and has a planar first reflective surface and a spheroidal second reflective surface. A hole which serves as a light transmitting portion is made in the center B of the first reflective surface, and a concave portion which transmits a divergent bundle of rays emitted from a radiating point A of the optical fiber is made in the center of the second reflective surface. The points A and B are optically in conjugation with each other. The divergent bundle of rays emitted from the radiating point A passes through the concave portion and is incident to the optical element. Then, the light is reflected by the reflective surfaces, thereby being converged on the hole, and is emergent from the optical element through the hole.

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First Claim