Wavelength tunable liquid crystal etalon filter including double seal line and manufacturing method of the same
AssigneeAlbatrace, Inc.
InventorJang Kun SONG
Life of this patent
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Abstract
A wavelength-tunable etalon includes 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. The first seal line comprises a sub inlet configured to fluidly communicate the main liquid crystal accommodating space with the sub-liquid crystal accommodating space.
Claims20
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.
A manufacturing method of a wavelength-tunable etalon, comprising:
- generating a reflection layer, an electrode, and an alignment layer on a surface of a first substrate and a surface of a second substrate;
- applying a first seal line on the surface of the first substrate along a boundary of a sub-liquid crystal accommodating space excluding a main inlet;
- applying a second seal line on the surface of the first substrate along a boundary of a main liquid crystal accommodating space and the sub-liquid crystal accommodating space excluding a sub inlet within a boundary of the first seal line;
- generating a substrate assembly by aligning the second substrate and the first substrate;
- sequentially injecting liquid crystal through the main inlet into the main liquid crystal accommodating space and the sub-liquid crystal accommodating space;
- and
- sealing the main inlet, 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.
The manufacturing method of claim 14, wherein the sub inlet is formed spaced apart from the main inlet.
Dependencies are inferred from the claim text.