Small-sized optical condenser

Abstract

Abstract PURPOSE:To obtain a small-sized condenser having a small loss, by distributing plural rod lenses so that the center axes of them become coincident with a straight line formed by connecting the center point of the convex spherical surface of a plano-convex lens and the center point on the convex spherical surface. CONSTITUTION:The beams put into an optical fiber 8 from the seven semiconductor laser beams are converged by rod lenses 5 and then condensed at the center point 9 on the spherical surface of a semispherical lens 7. In this case, the seven rod lenses 5 and glass rods 6 and adhered to eah other and the fiber 8 is adhered vertically to the other end of eac glass rod 6. Then the adhesive 10 is coated on the spherical surface of the lens 7 to ensure a simultaneous adhesion for seven rod lenses 5. In this case, an even force is applied to the inner circumference of each lens 5 by the surface tension of the adhesive 10. Thus the center axes 11 of the lenses 5 are all arrayed toward the center point 9. In such way, a small-sized condenser is obtained with a small loss.

Inventors

• 👤 Kenichi Kubodera
• 👤 Juichi Noda
• 👤 Kenjiyu Otsuka

Bibliographic Details