technical information of cover glass used for security access control devices

Cover glass used in face recognition devices, intercoms, digital door locks, surveillance systems, time attendance systems, and security cameras must meet specific technical requirements for durability, optical clarity, and environmental resistance. Below are the key technical specifications:

1. Material Types

Chemically Strengthened Glass (Alkali-Aluminosilicate)

High scratch & impact resistance (e.g., Gorilla Glass, Dragontrail)

Used in high-end biometric devices

Tempered Glass (Soda-Lime or Borosilicate)

Heat-treated for improved strength (3-5x stronger than standard glass)

Common in security cameras & outdoor devices

Anti-Reflective (AR) Coated Glass

Reduces glare for better IR & visible light transmission

Essential for facial recognition accuracy

IR (Infrared) Transmissive Glass

Allows IR light (750nm–1200nm) for night vision & biometric scanning

Often used with black masking (BM) coating to hide internal components.

2. Key Technical Specifications

Parameter	Typical Value	Purpose
Thickness	0.5mm – 3.0mm	Balance between durability & optical clarity
Hardness	≥7H (Pencil Hardness)	Scratch resistance
Transmittance (Visible Light)	≥90%	Clear image capture
IR Transmittance	≥85% (850nm:≥90% transmittance/940nm:≥85% transmittance)	Night vision & facial recognition
Surface Treatment	Hydrophobic/Oleophobic Coating	Anti-fingerprint, anti-smudge
Impact Resistance	≥1.5J (Drop Test)	Withstands accidental drops
Temperature Range	-30°C to +80°C	Outdoor & extreme weather use
UV Resistance	Blocks UV (optional)	Prevents yellowing over time

3. Optical & Functional Requirements

Low Birefringence → Prevents distortion in camera lenses

Anti-Glare (AG) Treatment → Reduces reflections in bright environments

EMI Shielding (Optional) → For RF-sensitive devices (e.g., smart locks)

Custom Cutouts → For camera, sensor, and microphone alignment

4.Durability & Environmental Resistance

a. Chemical Strengthening vs. Tempering

Property	Chemically Strengthened Glass	Tempered Glass
Impact Resistance	Better for thin glass (<1mm)	Better for thicker glass (>3mm)
Scratch Resistance	6H–9H (better)	5H–7H

b.Surface Treatments for Longevity

Hydrophobic/Oleophobic Coating:

Reduces fingerprints, improves cleaning.

Contact angle ≥110° (for water repellency).

Anti-Glare (AG) Etching:

Haze level (5%–60%) affects readability in sunlight.

Too much haze can scatter IR light (bad for facial recognition)

5.Mechanical & Integration Considerations

Thickness vs. Strength Trade-off

	Best For	Trade-offs
0.5–1.1mm	Slim devices (smart door locks, tablets)	Requires chemical strengthening
1.5–2.5mm	Outdoor cameras, vandal-resistant intercoms	Heavier but more impact-resistant
3.0mm+	High-security systems (banking, military)	Bulky, may reduce optical clarity

6.Key Differentiation of Saida Glass vs. other supplier:

Competitive Factor	Saida Glass Advantages	Typical Competitor Weaknesses
Material Options	Wider selection (Gorilla Glass, Dragontrail, Xensation, custom chemistries)	Limited to 1–2 brands (e.g., only Dragontrail)
IR Optimization	Proprietary AR/IR coatings (≥90% transmittance @850nm/940nm)	Generic coatings (≤85% IR transmittance)
Cost Efficiency	Lower MOQ (100pcs for prototypes) vs. competitors (500–1,000pcs)	High minimum order quantities
Lead Time	2-3 weeks (standard), 3-4 weeks (custom) vs. industry avg. 4-5 weeks	Slower due to outsourcing coating/printing
Durability Testing	In-house lab (drop, abrasion, temperature tests)	Third-party testing (adds cost/delays)
Customization	Laser-cut holes, silk-screen printing, surface treatment in one stop	Limited to basic cutting/etching
Supply Chain	Vertical integration (raw glass → coating → cutting → shipping)	Fragmented (multiple vendor)

6.1 Technical Capabilities Comparison

Optical Clarity (Critical for Facial Recognition)

Test	Saida Glass	Competitor
Visible Light Transmission (VLT)	93–95% (with AR coating)	88–92%
IR Transmittance (@850nm)	90–92%	80–85%
Haze (Anti-Glare)	5–20% (adjustable)	Fixed 10% or 60%