| 摘要 |
PURPOSE:To synthesize a signal equivalent to an output electric signal obtained from a pickup tube with a wide latitude, by taking a product of output electric signals obtained from plural pickup tubes. CONSTITUTION:An incident light 2 from a lens 1 is divided into two at a half mirror 3; one is reflected on a mirror 4 and formed on a pickup tube 7, and the other is reflected on mirrors 5, 6 and formed on a pickup tube 8. The output electric signals from the pickup tubes 7, 8 are multiplied at a multiplier 9. In designing the reflectance and transmittance of the half mirror 3 suitably, the latitude of synthesized signals obtained from the multiplier 11 is extended. |
