| 摘要 |
PURPOSE:To project a pattern image on an object having a wide extent with good image forming performance by constituting a light projecting lens of a lens section having an optical axis in which a pattern image is formed in the same direction as the optical axis of a photographing system, and another lens section which has an optical axis in which a pattern image is formed in the direction different from the optical axis of the photographing system and an opening near the optical axis. CONSTITUTION:A light projecting lens 1 is provided with a lens section 11 having an optical axis 15 in which a pattern image is formed in a direction almost equal to the optical axis of a photographing system, namely, an optical axis which is almost equal to that of the image forming system, master lens section 12, and a lens group 31 which has an optical axis 16 in which a pattern image is formed in a direction different from the optical axis of the photographing system, namely, an optical axis which is oblique to the optical axis of the photographing system and an opening near the optical axis 16. In addition, a lens section 14 which has an optical axis 17 in which a pattern image is formed in a direction different from the optical axis of the photographing system and an opening in the vicinity of the optical axis 17 is also provided to the lens 1. Therefore, a pattern image of a prescribed design can be projected on an object having a wide extent with good image forming performance. |
