OPTICAL LAMINATE

To provide an optical laminate allowing, even if arranged on an infrared-readable pattern formed on various substrates, the pattern to be read with infrared rays.SOLUTION: An optical laminate 100A includes a first principal plane S1 and a second principal plane S2 on a side opposite to the first pri...

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Bibliographic Details
Main Authors KUZUTA MASATO, MATSUDA SHOICHI, NUMATA YUDAI
Format Patent
LanguageEnglish
Japanese
Published 11.04.2024
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:To provide an optical laminate allowing, even if arranged on an infrared-readable pattern formed on various substrates, the pattern to be read with infrared rays.SOLUTION: An optical laminate 100A includes a first principal plane S1 and a second principal plane S2 on a side opposite to the first principal plane. The optical laminate includes: an optical filter layer 110 configured to transmit infrared rays and to reflect visible light; and a diffusion layer 120 configured to diffuse the visible light. When the second principal plane is arranged on an infrared-readable pattern formed on a substrate with a reflective index 66% and a back scattering ratio 19% with regard to infrared rays of wavelength 850 nm, the pattern can be read with infrared rays from a first principal plane side.SELECTED DRAWING: Figure 1 【課題】種々の下地上に形成された赤外線で読み取り可能なパターンの上に配置しても、赤外線でパターンを読み取りすることが可能な光学積層体を提供する。【解決手段】光学積層体１００Ａは、第１主面Ｓ１と、第１主面の反対側の第２主面Ｓ２を有する光学積層体であって、赤外線を透過し、可視光を反射する光学フィルタ層１１０と、可視光を拡散する拡散層１２０とを有し、波長が８５０ｎｍの赤外線の反射率が６６％、後方散乱率が１９％の下地上に形成された赤外線で読み取り可能なパターン上に第２主面を配置したとき、第１主面側から、赤外線でパターンを読み取ることができる。【選択図】図１
Bibliography:Application Number: JP20220157759