Light source of semiconductor laser

Abstract

Abstract PURPOSE:To handle a semiconductor laser having an astigmatism as a point light source which is not affected by adverse influence of the astigmatism by disposing a parallel flat surface plate obliquely in a luminous flux having an astigmatism, to be sent from the laser, and integrating the laser with the plate. CONSTITUTION:Optical beams having astigmatisms of different converging points in a direction parallel to a connecting surface and a direction perpendicular to the direction, irradiate from a semiconductor laser 1. A parallel flat surface plate 3 having a thickness (d) and a refractive index (n), is disposed obliquely in an optical beam to be sent front the laser 1. An astigmatism difference A generated by the plate 3 is given by a formula DELTA. The astigmatism generated by the laser 1 can be corrected by selectively setting the thickness (d), the refractive index (n), and an incident angle (inclining angle) (i) of the plate 3 based on the formula. Here, a light source in which the astigmatism is corrected, by integrating the laser 1 with the plate 3, is obtained by moving an angle regulating plate 6 as indicated by arrows.

Inventors

• 👤 Kimio Tateno
• 👤 立野　公男
• 👤 Akira Arimoto
• 👤 昭 有本

Bibliographic Details