Fixed-focus lens
A fixed-focus lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and an aperture. One of the seventh lens and the eighth lens is a positive lens, and the other of the seventh lens and the eighth lens is a negative lens....
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | A fixed-focus lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and an aperture. One of the seventh lens and the eighth lens is a positive lens, and the other of the seventh lens and the eighth lens is a negative lens. The aperture is arranged in front of the fifth lens. The fixed-focus lens satisfies a following condition: 0.2 < D1/LT < 0.5, wherein D1 is an outer diameter of the first lens, and LT is a distance in an optical axis between two surfaces of two lens on two outermost sides of the fixed-focus lens. |
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