| 摘要 |
An image pickup lens system according to the present invention includes a lens body having a positive power and a diaphragm which is unified with the lens body at a location between the first face and the second face of the lens body and of which inner cylindrical surface is disposed at a location of the inside of the lens body. Thus, the numbers of the elements of the image pickup lens system are decreased and the image pickup lens system can be produced accurately. Moreover, when the lens body and the diaphragm are unified each other, both optical axes of the lens body and the diaphragm can be very accurately adjusted and automatically adjusted. Thus, a work to adjust accurately those optical axes is not necessary so that the lens body and the diaphragm can be produced easily and speedy. Moreover, by disposing the actual diaphragm, this invention can prevent the occurrence of the stray light such a flare and a ghost and the like and can actually remove the stray light if it occurs.
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