| 摘要 |
PURPOSE: To reduce the number of components, to decrease the assembling man-hours and to reduce assembly error by integrally forming two optical elements and their hold members. CONSTITUTION: A concave lens section 40a, a cylindrical lens section 40b, and an annular mirror barrel 40c being a surrounding component are coupled and integrated. Furthermore, a metallic washer 40d for processing optical transparency is inserted to an end of a mirror barrel 40c on the light emission side. Thus, two optical functions are provided to a single integrally forming body and the adjustment of an optical axis is not required through high forming accuracy. Moreover, intrusion of a harmful light is prevented by the light transparency prevention processing. |
