US 12,403,001 B2
Lens for use in a human or animal body, and production methods thereof
Shuyan Zhang, Singapore (SG); Malini Olivo, Singapore (SG); and Renzhe Bi, Singapore (SG)
Assigned to Agency for Science, Technology and Research, Singapore (SG)
Appl. No. 17/269,179
Filed by Agency for Science, Technology and Research, Singapore (SG)
PCT Filed Aug. 16, 2019, PCT No. PCT/SG2019/050407
§ 371(c)(1), (2) Date Feb. 17, 2021,
PCT Pub. No. WO2020/036538, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 10201806994W (SG), filed on Aug. 17, 2018; application No. 10201806995R (SG), filed on Aug. 17, 2018; and application No. 10201806996P (SG), filed on Aug. 17, 2018.
Prior Publication US 2021/0275294 A1, Sep. 9, 2021
Int. Cl. A61F 2/16 (2006.01); G02C 7/02 (2006.01)
CPC A61F 2/1637 (2013.01) [G02C 7/022 (2013.01); A61F 2230/0002 (2013.01); G02C 2202/24 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A concave or convex side-view endoscopic lens for use inside a human or animal body, the lens comprising a metasurface configured to deflect and focus incident light,
wherein the metasurface is composed of at least one light transmissive biomaterial selected from the group consisting of a hydrogel, a gelatin, a silk fibroin, a polyester, a polysiloxane, a polyacrylate, an acrylate and derivatives thereof, and
wherein the metasurface comprises patterned nanostructures disposed on a substrate such that the metasurface has a phase profile φ(total) that is defined by the following formulae:
φtotal=φdefl+φfocus

OG Complex Work Unit Math
where θdefl is the angle of incident light deflection in the x direction, r is the radial position, f is the focal length and λ is the wavelength of incident light and the positive or negative sign is applied for diverging or converging lenses, respectively.