US 11,726,368 B2
Wavelength tunable liquid crystal etalon filter including double seal line and manufacturing method of the same
Jang Kun Song, Gwacheon-si (KR)
Filed by ALBATRACE, INC., Suwon-si (KR)
Filed on Mar. 13, 2023, as Appl. No. 18/120,468.
Application 18/120,468 is a continuation of application No. 17/499,079, filed on Oct. 12, 2021, granted, now 11,630,352.
Claims priority of application No. 10-2020-0131254 (KR), filed on Oct. 12, 2020.
Prior Publication US 2023/0213819 A1, Jul. 6, 2023
Int. Cl. G02F 1/1339 (2006.01); G02F 1/21 (2006.01); G02F 1/1335 (2006.01); G02F 1/1341 (2006.01); G02F 1/1343 (2006.01); G02F 1/1333 (2006.01); G02F 1/1337 (2006.01)
CPC G02F 1/1339 (2013.01) [G02F 1/1341 (2013.01); G02F 1/133553 (2013.01); G02F 1/216 (2013.01); G02F 1/1337 (2013.01); G02F 1/13439 (2013.01); G02F 1/133354 (2021.01); G02F 2203/055 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wavelength-tunable etalon, comprising:
a pair of substrates, each comprising a reflection layer, an electrode, and an alignment layer on opposing surfaces of the pair of substrates;
a first seal line configured to seal liquid crystal between the pair of substrates; and
a second seal line configured to divide a space in which the liquid crystal is sealed into a main liquid crystal accommodating space configured to pass laser and a sub-liquid crystal accommodating space provided external of the main liquid crystal accommodating space, wherein the second seal line comprises a sub inlet configured to fluidly communicate the main liquid crystal accommodating space with the sub-liquid crystal accommodating space, wherein even though the liquid crystal is injected, residual air or vacuum is located concentratedly at an outermost edge of the sub-liquid crystal accommodating space, and wherein an interval between the first seal line and the second seal line is larger in a space where the residual air or vacuum is located than in another space.