| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light source unit, small in size but, capable of suppressing a backward light leak, having a concave reflection mirror capable of refraining the light from passing through backward and a simplified composition. SOLUTION: The concave reflection mirror is such a mirror that the light reflection film is composed at the inside surface of the concave reflection mirror reflecting the light projected from the light source and projecting its reflected light through the light projection exit and it features at its baked construction made of a silica-glass powder and a heat-resist metal powder. The feature of the light source unit is to consist of the light source lamp and the above concave reflection mirror.</p> |
