Optical system lens
An optical system and lens technology, applied in optics, optical components, instruments, etc., can solve the problems of insufficient lens focal length, unreasonable distribution of telephoto power, low refractive index of materials, etc. The effect of light path design
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Embodiment 1
[0053] Such as figure 1 As shown, this embodiment includes the first fixed lens group G1 with positive refractive power, the first zoom lens group G2 with negative refractive power, the aperture stop STP, and the second fixed lens group with positive refractive power from the object side to the image side. Two zoom lens groups G3, a focusing lens group G4 with negative power, a second fixed lens group G5 with positive power, and an optical filter ICF from the object side to the image side along the optical axis through the first zoom lens group At the same time, the second zoom lens group moves along the optical axis, and the position of the lens group on the optical axis corresponds to the position of the first zoom lens group, so as to realize the zoom from the wide-angle end to the telephoto end; through the focusing lens group Move along the optical axis to perform correction and focus adjustment of the image plane variation accompanying the magnification change.
[0054]...
Embodiment 2
[0078] Such as Figure 4 As shown, the zoom lens in this embodiment is compared with Embodiment 1. In this embodiment, the second lens L2 with negative refractive power is cemented with the first lens L1 with positive refractive power, and the refractive index of the lens material and Abbe The collocation of the number ensures the peripheral chromatic aberration transition of the optical system as much as possible.
[0079] Various numerical data about the zoom lens of Example 2 are shown below.
[0080] EFL=6.40 (wide-angle end)~265.0 (telephoto end)
[0081] F number = 1.51 (wide-angle end) ~ 4.58 (telephoto end)
[0082] Table 1 shows the structural parameters of the lens of Example 2; Table 2 shows the zoom parameters of the lens of Example 2; Table 3 shows the aspheric coefficient of the lens of Example 2.
[0083] image 3 It is the various aberration diagrams of the wide-angle end of the lens of embodiment 2 with respect to the d line; Figure 4 It is each aberrati...
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