| 摘要 |
PURPOSE:To obtain a lens system having good performance by providing a joining function provided with projecting parts and recesses for the purpose of coupling to the lens to be joined. CONSTITUTION:The state before and after joining of the 1st lens 10 and the 2nd lens 20 is shown. A supporting part 13 is provided on the outside circumference of the lens body 11 of the lens 10 and plural recesses 14 for coupling the lens are provided on the lens coupling face which is the rear side face of the part 13 in the circumferential direction of the body 11. Plural projecting parts 15 for coupling the lens are further provided on the lens coupling face 18 which is the front side face of a lens supporting part 17 on the outside circumference of the lens body 12 of the 2nd lens 20 and in the position opposite to the resses 14 of the lens 10 in the circumferential direction of the lens body 12. Both lenses 10, 20 are coupled the above-mentioned recesses 14 and the projecting parts 15. |
