Optical system and projection device
An optical system and light technology, applied in the field of projection, can solve the problems of limited display resolution of a projection device and the inability to increase the resolution of a projected image, and achieve the effect of increasing the resolution
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[0085] In the first embodiment, the design data of the optical system is as shown in Table 1:
[0086] Table 1
[0087]
[0088] Wherein, the focal length f of the optical system is 9mm;
[0089] The aperture number Fno of the optical system is 1.7;
[0090] The overall length of the optical system is 78mm.
[0091] Wherein, the light incident surface and the light exit surface of the first lens 31 and the light incident surface and the light exit surface of the eighth lens 44 are aspheric structures, wherein A4, A6, A8, and A10 are aspheric high-order aspheric lenses. Item coefficients, as shown in Table 2.
[0092] Table 2
[0093]
[0094]
[0095] Wherein, the light incident surface and the light exit surface of the first lens 31 and the light incident surface and the light exit surface of the eighth lens 44 are even-order aspheric surfaces, wherein the even-order aspheric surfaces satisfy the following relationship:
[0096]
[0097] Among them, Y is the ...
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