US 12,411,305 B2
Temperature compensated spacer
Oded Lahav, Atzmon (IL); and Omer Stoller, Ein Vered (IL)
Assigned to RAFAEL ADVANCED DEFENSE SYSTEMS LTD., Haifa (IL)
Appl. No. 18/266,864
Filed by RAFAEL ADVANCED DEFENSE SYSTEMS LTD., Haifa (IL)
PCT Filed Mar. 20, 2022, PCT No. PCT/IB2022/052514
§ 371(c)(1), (2) Date Jun. 13, 2023,
PCT Pub. No. WO2022/269371, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 284361 (IL), filed on Jun. 24, 2021.
Prior Publication US 2024/0272402 A1, Aug. 15, 2024
Int. Cl. G02B 7/18 (2021.01)
CPC G02B 7/181 (2013.01) 14 Claims
OG exemplary drawing
 
1. A temperature compensated spacer for mounting a first element relative to a second element where a width of a gap between the first and second elements varies as a function of temperature, the spacer comprising:
(a) a first anchoring configuration for anchoring the spacer relative to the first element;
(b) a second anchoring configuration for anchoring the spacer relative to the second element;
(c) a frame providing a mechanical connection between said first and second anchoring configurations, said frame having a polygonal opening with a first diagonal extending across the width of the gap and a second diagonal extending transversely to said first diagonal; and
(d) a crossbar associated with said polygonal opening so as to span said second diagonal,
wherein said frame is formed from a first material having a first coefficient of thermal expansion and said crossbar is formed from a second material having a second coefficient of thermal expansion, said crossbar being associated with said second diagonal such that a length of said second diagonal is determined by a dimension of said crossbar, said first and second coefficients of thermal expansion differing such that variation in temperature causes deformation of said frame, thereby varying a length of said first diagonal according to an effective coefficient of thermal expansion greater than both said first and said second coefficients of thermal expansion.