JP2005274527A5 - - Google Patents

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Publication number
JP2005274527A5
JP2005274527A5 JP2004092096A JP2004092096A JP2005274527A5 JP 2005274527 A5 JP2005274527 A5 JP 2005274527A5 JP 2004092096 A JP2004092096 A JP 2004092096A JP 2004092096 A JP2004092096 A JP 2004092096A JP 2005274527 A5 JP2005274527 A5 JP 2005274527A5
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JP
Japan
Prior art keywords
cover glass
light transmitting
layer
substrate
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2004092096A
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Japanese (ja)
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JP2005274527A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP2004092096A priority Critical patent/JP2005274527A/en
Priority claimed from JP2004092096A external-priority patent/JP2005274527A/en
Publication of JP2005274527A publication Critical patent/JP2005274527A/en
Publication of JP2005274527A5 publication Critical patent/JP2005274527A5/ja
Pending legal-status Critical Current

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Claims (3)

サファイアを基板に使用した時計用カバーガラスであって、
前記基板の表面に、基板側を第１層として、第１、第３および第５層がＳｉＯ2 、第２および第４層がＴａ2Ｏ5 の光透過膜層からなる反射防止膜を形成し、前記反射防止膜の可視光領域における反射率の劣化が、耐傷性試験の前後で０．５％以下であることを特徴とする時計用カバーガラス。 A watch cover glass using sapphire as a substrate,
On the surface of the substrate, the substrate side as a first layer, forming a first, third and fifth layer SiO 2, an antireflection film in which the second and fourth layers formed of a light transmitting film layer of Ta 2 O 5 The watch cover glass is characterized in that the reflectance deterioration in the visible light region of the antireflection film is 0.5% or less before and after the scratch resistance test . 基準波長をλとしたときの、前記第１〜第５層の光透過膜層の光学的膜厚を各々Ｄ１、Ｄ２、Ｄ３、Ｄ４、Ｄ５とするとき、
Ｄ１＝（０．１１〜０．４９）×λ／４
Ｄ２＝（０．３３〜０．４９）×λ／４
Ｄ３＝（０．２５〜０．４１）×λ／４
Ｄ４＝（１．９９〜２．６５）×λ／４
Ｄ５＝（０．８０〜１．１２）×λ／４
であることを特徴とする請求項１記載の時計用カバーガラス。 When the optical film thicknesses of the first to fifth light transmitting film layers when the reference wavelength is λ are D1, D2, D3, D4, and D5,
D1 = (0.11 to 0.49) × λ / 4
D2 = (0.33 to 0.49) × λ / 4
D3 = (0.25-0.41) × λ / 4
D4 = (1.99-1.65) × λ / 4
D5 = (0.80-1.12) × λ / 4
The timepiece cover glass according to claim 1, wherein: 基準波長をλとしたときの、前記第１〜第５層の光透過膜層の光学的膜厚を各々Ｄ１、Ｄ２、Ｄ３、Ｄ４、Ｄ５とするとき、
Ｄ１＝（１．７５〜２．３６）×λ／４
Ｄ２＝（０．４２〜０．６９）×λ／４
Ｄ３＝（０．０９〜０．２５）×λ／４
Ｄ４＝（０．９３〜１．４２）×λ／４
Ｄ５＝（０．８５〜１．１２）×λ／４
であることを特徴とする請求項１記載の時計用カバーガラス。 When the optical film thicknesses of the first to fifth light transmitting film layers when the reference wavelength is λ are D1, D2, D3, D4, and D5,
D1 = (1.75 to 2.36) × λ / 4
D2 = (0.42 to 0.69) × λ / 4
D3 = (0.09 to 0.25) × λ / 4
D4 = (0.93 to 1.42) × λ / 4
D5 = (0.85 to 1.12) × λ / 4
The timepiece cover glass according to claim 1, wherein:
JP2004092096A 2004-03-26 2004-03-26 Cover glass for clock Pending JP2005274527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004092096A JP2005274527A (en) 2004-03-26 2004-03-26 Cover glass for clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004092096A JP2005274527A (en) 2004-03-26 2004-03-26 Cover glass for clock

Publications (2)

Publication Number Publication Date
JP2005274527A JP2005274527A (en) 2005-10-06
JP2005274527A5 true JP2005274527A5 (en) 2007-05-31

Family

ID=35174340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004092096A Pending JP2005274527A (en) 2004-03-26 2004-03-26 Cover glass for clock

Country Status (1)

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JP (1) JP2005274527A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101809512B (en) * 2007-09-26 2012-05-23 西铁城控股株式会社 Cover glass for watch
EP2778252A3 (en) * 2013-03-15 2014-12-10 Apple Inc. Layered Coatings For Sapphire Structure
US9366784B2 (en) 2013-05-07 2016-06-14 Corning Incorporated Low-color scratch-resistant articles with a multilayer optical film
US9703011B2 (en) 2013-05-07 2017-07-11 Corning Incorporated Scratch-resistant articles with a gradient layer
US9684097B2 (en) 2013-05-07 2017-06-20 Corning Incorporated Scratch-resistant articles with retained optical properties
US9359261B2 (en) 2013-05-07 2016-06-07 Corning Incorporated Low-color scratch-resistant articles with a multilayer optical film
US9110230B2 (en) 2013-05-07 2015-08-18 Corning Incorporated Scratch-resistant articles with retained optical properties
US10160688B2 (en) 2013-09-13 2018-12-25 Corning Incorporated Fracture-resistant layered-substrates and articles including the same
EP3085673B1 (en) * 2013-12-16 2019-05-08 AGC Inc. Glass with anti-reflection film and method for manufacturing same
US9335444B2 (en) 2014-05-12 2016-05-10 Corning Incorporated Durable and scratch-resistant anti-reflective articles
US11267973B2 (en) 2014-05-12 2022-03-08 Corning Incorporated Durable anti-reflective articles
US9790593B2 (en) 2014-08-01 2017-10-17 Corning Incorporated Scratch-resistant materials and articles including the same
EP3300520B1 (en) 2015-09-14 2020-11-25 Corning Incorporated High light transmission and scratch-resistant anti-reflective articles
CH714459B1 (en) 2017-12-19 2024-06-14 Guenat Sa Montres Valgine Watch glass.
WO2020037042A1 (en) 2018-08-17 2020-02-20 Corning Incorporated Inorganic oxide articles with thin, durable anti-reflective structures

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310861B2 (en) * 1972-04-26 1978-04-17
JPS5788043A (en) * 1980-11-13 1982-06-01 Purotekuto Kogaku:Kk Glass cover for watch
JPS60225101A (en) * 1984-04-23 1985-11-09 Minolta Camera Co Ltd Optical member made of plastics
JPH04143702A (en) * 1990-10-05 1992-05-18 Ricoh Co Ltd Reflection preventive film
JPH052101A (en) * 1991-06-26 1993-01-08 Konica Corp Optical component
JP2002277606A (en) * 2001-03-21 2002-09-25 Olympus Optical Co Ltd Antireflection film and optical element
JP2003057406A (en) * 2001-08-21 2003-02-26 Sumitomo Metal Mining Co Ltd Antireflection film for faraday rotator
JP2004085231A (en) * 2002-08-23 2004-03-18 Citizen Watch Co Ltd Cover glass for timepiece
JP2005275294A (en) * 2004-03-26 2005-10-06 Cimeo Precision Co Ltd Optical element

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