Title:
HYBRID REFRACTIVE GRADIENT-INDEX OPTICS FOR TIME-OF-FLY SENSORS
Document Type and Number:
WIPO Patent Application WO/2021/120826
Kind Code:
A1
Abstract:
A time-of-fly sensors with hybrid refractive gradient-index optics. A time-of-fly (TOF) imaging subsystem can receive optical information along an optical path at an imaging plane. A hybrid lens can be coupled with the TOF imaging subsystem and disposed in the optical path so that the imaging plane is substantially at a focal plane of the hybrid lens. The hybrid lens can include a less-than-quarter-pitch gradient index (GRIN) lens portion (210), and a refractive lens portion (220) with a convex optical interface. The portions of the hybrid lens, together, produce a combined focal length that defines the focal plane. The hybrid lens is designed so that the combined focal length is less than a quarter-pitch focal length of the GRIN lens portion (210) and has less spherical aberration than either lens portion.
Inventors:
HE YI (CN)
PI BO (CN)
PI BO (CN)
Application Number:
PCT/CN2020/122349
Publication Date:
June 24, 2021
Filing Date:
October 21, 2020
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
G01S7/48; G02B3/00
Foreign References:
| CN109031247A | 2018-12-18 | |||
| CN101470251A | 2009-07-01 | |||
| CN106716240A | 2017-05-24 | |||
| CN107615132A | 2018-01-19 | |||
| US20180031704A1 | 2018-02-01 |
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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