Optical lens system
AssigneeYoung Optics Inc.
InventorsHung-You Cheng, Yu-Hung Chou, Ching-Lung Lai, Yi-Hua Lin, Wei-Hao Huang
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Abstract
An optical lens system includes, in order from a magnified side to a minified side, a first lens group of positive refractive power and a second lens group of positive refractive power. The first lens group includes a first lens and a second lens, and the second lens group includes a third lens and a fourth lens. One of the third lens and the fourth lens includes one aspheric surface, and each of the lenses in the optical lens system is a singlet lens. The optical lens satisfies a condition of TE(λ=400)>94%, where TE(λ=400) denotes an overall transmittance of all of the lenses in the optical lens system measured at a wavelength of 400 nm.
Claims20
An optical lens system for imaging, comprising in order from a magnified side to a minified side:
- a first lens group of positive refractive power comprising a first lens and a second lens;
- and
- a second lens group of positive refractive power comprising a third lens and a fourth lens, wherein one of the third lens and the fourth lens includes one aspheric surface, each of the lenses in the optical lens system is a singlet lens, and, during focusing, the first lens group remains stationary and the second lens group is movable in a direction of an optical axis, and the optical lens system satisfies a condition of TE(λ=400)>94%, where TE(λ=400) denotes an overall transmittance of all of the lenses in the optical lens system measured at a wavelength of 400 nm.
Dependencies are inferred from the claim text.