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High Transmission Neutral Colour Anti Reflection Coating For Patterned Solar Glass

Abstract: High Transmission Neutral Colour Anti-Reflection Coating for Patterned Solar Glass This invention discloses a patterned solar glass with a neutral colour anti reflection coating (ARC) designed to enhance light transmission and optical performance. The dual-side structured glass features a smoother side coated with a two-layer anti-reflection coating. The bottom layer is formulated from a silane precursor, a hydrolyzing agent, an acid catalyst, porosity-enhancing agents, and a combination of solvents, achieving a refractive index of 1.4 to 1.5. The top layer is a nano-composite-based AR coating with a refractive index of 1.25 to 1.35 is applied on the bottom layer. The layers are chemically bonded via a roll-coating process, with precise thickness control wherein, the bottom layer ranges from 180–210 nm and the top layer ranges from 140–160 nm. This gradient refractive index structure results in a transmission gain of 2.3% and minimizing Fresnel reflection losses. The coating ensures neutral colour appearance and uniform light transmission, improving omnidirectional performance under varying light angles. (Referring to the Fig. 1)

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
08 March 2024
Publication Number
37/2025
Publication Type
INA
Invention Field
ELECTRONICS
Status
Email
Parent Application

Applicants

Borosil Renewables Limited
1101, Crescenzo, G- Block, Opp. MCA Club, Bandra Kurla Complex, Bandra (East), Maharashtra, India

Inventors

1. Narendra Chundi
14-184, Sri Sai Nagar colony, Balapur, Hyderabad, Telangana, India 50058
2. Dr. Jeetendra Sehgal
901, Shriram Chandrama Society, Pashan Highway Side Road, Baner, Pune, Maharashtra, India 411045

Specification

We claim:
1. A patterned solar glass with neutral colour anti reflection coating comprising:
a dual side structured patterned solar glass having a smoother side and a rough
side wherein, the smoother side is coated with a neutral colour anti- reflection
coating comprising a bottom layer and a top layer, wherein,
the said bottom layer is composed of a silane precursor, a
hydrolyzing agent, an acid catalyst, porosity enhancing agents
and at least two solvents the said top layer is composed of a nano-composite based antireflection coating composition having porosity enhancing
agents and binders, wherein the said top layer is applied on the
bottom layer, wherein, refractive index of said bottom layer
ranges from 1.4 to 1.5 and the refractive index of top layer
ranges from 1.25 to 1.35, thereby creating a gradient refractive
index resulting in a transmission gain of 2.3% and exhibiting a
neutral colour appearance by ensuring uniform light
transmission, thereby enhancing the performance in varying
light angles due to its omnidirectional properties.
2. The neutral colour anti reflection coating of claim 1, wherein the top layer is
chemically bonded to the bottom layer via a roll coating process in a
controlled environment to achieve uniform coating thickness.
3. The neutral colour anti relection coating of claim 1, wherein the combination
of a high-transparency bottom layer and a nano-composite-based top layer
results in a single anti reflection coating

Documents

Application Documents

# Name Date
1 202421016954-STATEMENT OF UNDERTAKING (FORM 3) [08-03-2024(online)].pdf 2024-03-08
2 202421016954-PROVISIONAL SPECIFICATION [08-03-2024(online)].pdf 2024-03-08
3 202421016954-FORM 1 [08-03-2024(online)].pdf 2024-03-08
4 202421016954-DECLARATION OF INVENTORSHIP (FORM 5) [08-03-2024(online)].pdf 2024-03-08
5 202421016954-Proof of Right [09-05-2024(online)].pdf 2024-05-09
6 202421016954-FORM-26 [09-05-2024(online)].pdf 2024-05-09
7 202421016954-Proof of Right [25-06-2024(online)].pdf 2024-06-25
8 202421016954-FORM-26 [25-06-2024(online)].pdf 2024-06-25
9 202421016954-DRAWING [07-03-2025(online)].pdf 2025-03-07
10 202421016954-COMPLETE SPECIFICATION [07-03-2025(online)].pdf 2025-03-07
11 Abstract.jpg 2025-04-28
12 202421016954-Power of Attorney [06-08-2025(online)].pdf 2025-08-06
13 202421016954-Form 1 (Submitted on date of filing) [06-08-2025(online)].pdf 2025-08-06
14 202421016954-Covering Letter [06-08-2025(online)].pdf 2025-08-06