| 摘要 |
PROBLEM TO BE SOLVED: To obtain a strong coherent divergence light, excellent in coherency by varying the refractive index of a transparent body locally and irradiating the transparent body with a laser light. SOLUTION: When a transparent body (transparent plate) of glass, quartz, optical crystal, transparent plastic, etc., is varies physically by making the micropoints (several tensμm) irregular locally, or injecting a micro quantity of liquid or bubble in order to after the density and to cause an optical distortion, the refractive index is varied to induce a strong coherent divergence light in the irradiated laser light. When an absorption cell (measuring cell) having four transparent sides is filled with a water dispersed with latex particles of about 0.3μm, and irradiated with a pumping laser (KGW laser, etc.) from a direction perpendicular to the optical axis of a He-Ne laser for the purpose, a coherent divergence light is generated in synchronism with a pulse from the pumping laser and a significant fluctuation of interference fringe can be observed on a screen in synchronism with the pulse from the pumping laser.
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