公开(公告)号：US20220229268A1

公开(公告)日：2022-07-21

申请号：US17577362

申请日：2022-01-17

Applicant: Young Optics Inc.

Inventor： Shuo-Chieh Chang ,  Ching-Lung Lai ,  Hsin-Te Chen ,  Kuo-Chuan Wang

IPC: G02B9/04 ,  G02B13/18 ,  G02B13/16 ,  G02B7/02 ,  G02B13/14

Abstract: The disclosure provides a projection lens including a first lens set and a second lens set disposed sequentially from a magnified side to a reduced side. The first lens set and the second lens set are separated by a minimum inner diameter of a lens barrel. The first lens set includes 4 to 6 spherical lenses, and a refractive power of the first lens set is negative. The second lens set includes 4 to 6 lenses, where one of the lenses is an aspheric lens, and a refractive power of the second lens set is positive. A transmittance of the projection lens at a wavelength of 365 nm is greater than or equal to 75%.

公开(公告)号：US11988890B2

公开(公告)日：2024-05-21

申请号：US16779046

申请日：2020-01-31

Applicant: YOUNG OPTICS INC.

Inventor： Shuo-Chieh Chang ,  Yi-Hsueh Chen

IPC: G02B3/02 ,  G02B7/04 ,  G02B13/18 ,  G02B13/04 ,  G02B13/16

CPC classification number: G02B7/04 ,  G02B13/18 ,  G02B13/04 ,  G02B13/16

Abstract: A fixed focus lens includes a first lens group with a negative refractive power, an aperture stop, and a second lens group with a positive refractive power arranged in order from a first side to a second side. The first lens group has at least two lenses including at least one aspheric lens. The second lens group includes at least five lenses, the at least five lenses comprising a first compound lens and a second compound lens. A difference between a maximum Abbe number and a minimum Abbe number for all lenses of the first compound lens is greater than 50, and a difference between a maximum Abbe number and a minimum Abbe number for all lenses of the second compound lens is greater than 45.