US 11,899,188 B2
Optical lens system
Hung-You Cheng, Hsinchu (TW); Yu-Hung Chou, Hsinchu (TW); Ching-Lung Lai, Hsinchu (TW); Yi-Hua Lin, Hsinchu (TW); and Wei-Hao Huang, Hsinchu (TW)
Assigned to YOUNG OPTICS INC., Hsinchu Science Park (TW)
Filed by Young Optics Inc., Hsinchu (TW)
Filed on Aug. 8, 2022, as Appl. No. 17/883,337.
Application 17/883,337 is a continuation of application No. 16/821,253, filed on Mar. 17, 2020, granted, now 11,448,859.
Application 16/821,253 is a continuation of application No. 14/981,691, filed on Dec. 28, 2015, granted, now 10,656,397, issued on May 19, 2020.
Application 14/981,691 is a continuation in part of application No. 14/750,569, filed on Jun. 25, 2015, abandoned.
Prior Publication US 2022/0382023 A1, Dec. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); G02B 13/14 (2006.01); G02B 13/04 (2006.01)
CPC G02B 13/143 (2013.01) [G02B 9/64 (2013.01); G02B 13/0045 (2013.01); G02B 13/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.