US 12,072,475 B2
Miniature telephoto lens assembly
Michael Dror, Nes Ziona (IL); Ephraim Goldenberg, Ashdod (IL); and Gal Shabtay, Tel Aviv (IL)
Assigned to Corephotonics Ltd., Tel Aviv (IL)
Filed by Corephotonics Ltd., Tel Aviv (IL)
Filed on Oct. 13, 2021, as Appl. No. 17/499,878.
Application 17/499,878 is a continuation of application No. 16/872,934, filed on May 12, 2020, abandoned.
Application 16/872,934 is a continuation of application No. 16/829,804, filed on Mar. 25, 2020, granted, now 11,125,980, issued on Sep. 21, 2021.
Application 16/829,804 is a continuation of application No. 16/665,977, filed on Oct. 28, 2019, granted, now 10,795,134, issued on Oct. 6, 2020.
Application 16/665,977 is a continuation of application No. 16/296,272, filed on Mar. 8, 2019, granted, now 10,488,630, issued on Nov. 26, 2019.
Application 16/296,272 is a continuation of application No. 15/976,422, filed on May 10, 2018, granted, now 10,317,647, issued on Jun. 11, 2019.
Application 16/296,272 is a continuation of application No. 15/976,391, filed on May 10, 2018, granted, now 10,330,897, issued on Jun. 25, 2019.
Application 15/976,422 is a continuation of application No. 15/817,235, filed on Nov. 19, 2017, granted, now 10,324,277, issued on Jun. 18, 2019.
Application 15/817,235 is a continuation of application No. 15/418,925, filed on Jan. 30, 2017, granted, now 9,857,568, issued on Jan. 2, 2018.
Application 15/418,925 is a continuation in part of application No. 15/170,472, filed on Jun. 1, 2016, granted, now 9,568,712, issued on Feb. 14, 2017.
Application 15/170,472 is a continuation of application No. 14/932,319, filed on Nov. 4, 2015, granted, now 9,402,032, issued on Jul. 26, 2016.
Application 14/932,319 is a continuation of application No. 14/367,924, abandoned, previously published as PCT/IB2014/062465, filed on Jun. 20, 2014.
Claims priority of provisional application 61/842,987, filed on Jul. 4, 2013.
Prior Publication US 2022/0066174 A1, Mar. 3, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 13/02 (2006.01); G02B 9/60 (2006.01); G02B 27/00 (2006.01); G02B 1/04 (2006.01); G02B 27/64 (2006.01); G02B 5/00 (2006.01); G02B 9/00 (2006.01); H04N 101/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 1/041 (2013.01); G02B 9/60 (2013.01); G02B 13/02 (2013.01); G02B 27/0025 (2013.01); G02B 27/646 (2013.01); G02B 5/005 (2013.01); G02B 9/00 (2013.01); G02B 13/002 (2013.01); H04N 2101/00 (2013.01); H04N 2201/00 (2013.01); Y10T 29/4913 (2015.01)] 16 Claims
OG exemplary drawing
 
1. A lens system, comprising:
a lens assembly comprising a plurality of refractive lens elements arranged along an optical axis with a first lens element on an object side, wherein at least one surface of at least one of the plurality of refractive lens elements is aspheric, and wherein the lens assembly has an effective focal length EFL;
a window positioned between the plurality of lens elements and an image plane, wherein the lens system has a total track length TTL of 6.5 mm or less, a ratio TTL/EFL smaller than 1.0, a F number smaller than 2.9, and a ratio L11/L1e between a largest optical axis thickness L11 and a circumferential edge thickness L1e of the first lens element smaller than 3.08; and
a stop positioned before the first lens element, wherein the plurality of lens elements includes, in order from an object side to an image sidee, a first group comprising the first lens element, a second lens element with negative refractive power and a third lens element, and a second group comprising a first element of the second group and a second lens element of the second group, wherein the first and second groups are separated by a gap that is larger than twice any other gap between lens elements, wherein the first lens element has positive refractive power and wherein the first element of the second group and the second lens element of the second group have opposite refractive powers.