| 摘要 |
PROBLEM TO BE SOLVED: To enable detecting mutual deviation of a transmitting axis and a receiving axis in laser radar equipment. SOLUTION: By illuminating a field stop 4 determining a receiving axis, a light is outputted in the direction opposite to a receiving light. A part of the outputted light is led out with a reflecting mirror 9. A part of a transmitting laser beam is led out with a semitransparent mirror 10. The two beams are combined by the semitransparent mirror 10 and inputted in an image sensor 12. The axis deviation appears as discrepancy of spot positions on the image sensor 12. In order to prevent that axes mutually independently change by the environmental influence, the reflecting mirror 9 and the semitransparent mirror 10 are constituted integrally by using a retaining frame 11.
|
