imaging lens
An imaging lens and lens technology, applied in the field of imaging lenses, can solve the problems of large defocus amount and difficult to meet the requirements of high-definition resolution of products, and achieve the effect of small defocus amount, clear resolution image power, and large aperture.
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[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0045] see figure 1 , figure 1 is a schematic diagram of the lens configuration of the first embodiment of the imaging lens 1 according to the present invention. During imaging, the light from the object side is finally imaged on the imaging surface IMA1. The imaging lens 1 is an infrared confocal lens, and includes in sequence from the object side to the image side along the optical axis OA1: a first lens group including a first lens L11; a second lens group including a second lens L12; a third lens group , including a third lens L13; an aperture ST1; a fourth lens group including a fourth lens...
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