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Zoom lens
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A zoom lens and lens technology, applied in the field of zoom lenses, can solve the problems of heavy weight, inability to achieve optical effects, and high cost
Active Publication Date: 2020-08-21
DONGGUAN YUTONG OPTICAL TECH
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Abstract
Description
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Problems solved by technology
Expensive and heavy
If low cost is required, only using glass spherical lenses or designing with one or two glass aspheric lenses cannot achieve better optical effects
Method used
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Embodiment 1
[0079] In embodiment 1, such as figure 1 As shown, the zoom lens includes a focus group 100, a fixed group 200, and a zoom group 300 arranged sequentially from the object side to the image side; the zoom lens also includes a diaphragm 400, and the diaphragm 400 is arranged in the fixed group 200 Middle; during the zooming process, the fixed group 200 is fixed in position, the zooming group 300 moves along the optical axis for zooming, and the focusing group 100 moves along the optical axis for focusing;
[0080] Among them, the focal power of the zoom lens at the wide-angle end is W_F, and the focal powers of the focus group, fixed group, and zoom group are G1_F, G2_F, and G3_F respectively; Degree of satisfaction: -0.55
[0081] The focusing group 100 includes the first lens 1, the second lens 2 and the third lens 3, the fixed group 200 includes the fourth lens 4, and the zoom group 300 includes the fifth lens 5, the sixth l...
Embodiment 2
[0103] In embodiment 2, Figure 10 is a schematic structural diagram of another zoom lens provided by an embodiment of the present invention, refer to Figure 10 , the zoom lens includes a focus group 100, a fixed group 200, and a zoom group 300 arranged sequentially from the object side to the image side; the zoom lens also includes an aperture 400, and the aperture 400 is arranged in the fixed group 200; During the zooming process, the fixed group 200 is fixed in position, the zooming group 300 moves along the optical axis for zooming, and the focusing group 100 moves along the optical axis for focusing;
[0104] Among them, the focal power of the zoom lens at the wide-angle end is W_F, and the focal powers of the focus group, fixed group, and zoom group are the optical powers of each group of G1_F, G2_F, and G3_F relative to the zoom lens at the wide-angle end Meet: -0.55
[0105] The focusing group 100 includes the first...
Embodiment 3
[0126] In embodiment 3, Figure 19 It is a structural schematic diagram of another zoom lens provided by the embodiment of the present invention, refer to Figure 19 , the zoom lens includes a focus group 100, a fixed group 200, and a zoom group 300 arranged sequentially from the object side to the image side; the zoom lens also includes an aperture 400, and the aperture 400 is arranged in the fixed group 200; During the zooming process, the fixed group 200 is fixed in position, the zooming group 300 moves along the optical axis for zooming, and the focusing group 100 moves along the optical axis for focusing;
[0127] Among them, the focal power of the zoom lens at the wide-angle end is W_F, and the focal powers of the focus group, fixed group, and zoom group are G1_F, G2_F, and G3_F respectively; Degree of satisfaction: -0.55
[0128] The focusing group 100 includes the first lens 1, the second lens 2 and the third lens 3,...
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Abstract
The embodiment of the invention discloses a zoom lens. The zoom lens comprises a focusing group, a fixed group and a zoom group which are sequentially arranged from an object space to an image space;in the zooming process, the position of the fixed group is fixed, and the zoom group and the focusing group move along an optical axis; the focal power of each group at a wide-angle end relative to the zoom lens satisfies a certain relational expression; the focusing group comprises a first lens, a second lens and a third lens, the fixed group comprises a fourth lens, and the zoom group comprisesa fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens; the seventh lens and the eighth lens form a cemented lens group, and the focal power of each lens relative tothe corresponding group is set to satisfy a certain relational expression. According to the embodiment of the invention, the zoom lens can be formed by mixing four glass lenses and six plastic lenses, the manufacturing cost of the zoom lens can be properly reduced, light weight is realized, meanwhile the visible light aberration is well corrected, and a confocal effect of visible light and infrared light is ensured.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of optical lenses, and in particular, to a zoom lens. Background technique [0002] The zoom all-in-one machine has a wide range of applications in security fields such as smart transportation and face recognition. Currently, there are many all-in-one zoom cameras on the market. If you want to achieve a better imaging effect, you need a combination of more glass spherical lenses, or a combination of several glass aspheric lenses. Expensive and heavy. If low cost is required, good optical effects cannot be achieved by only using glass spherical lenses or designing with one or two glass aspherical lenses. Contents of the invention [0003] The present invention provides a zoom lens to use fewer glass spherical lenses and glass aspheric lenses to realize high-performance zooming with a 1 / 1.8-inch CMOStarget surface, a diagonalfield of view from about 140 degrees to 54 degrees, and co...
Claims
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Application Information
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