| 摘要 |
PURPOSE:To eliminate defects at using only regular reflection lighting and to obtain a correct observation result by employing ring lighting on the surface of a body simultaneously with the regular reflection lighting and observing reflected light. CONSTITUTION:The light intensity of a light source 5 for the regular reflection lighting is varied by a voltage regulator 7 to light the body 1 by regular reflection and simultaneously, the body 1 is also lighted in a ring shape by a light source 6 for ring lighting, whose light intensity is adjusted by a voltage regulator 8. Thus, the regular reflection lighting and ring lighting are carried out simultaneously to eliminate such a trouble point that a correct observation result is hardly obtained owing to too many noises in the regular reflection lighting; and a distinctive observation is made to obtain the correct observation result. Further, the illuminance is varied by using the voltage regulators to perform the best lighting for the purpose of observation. |
