PrivacyGuard 28° micro-louver aluminosilicate glass blocks lateral screen viewing
Engineered optical tempered glass screen protector cut from 0.33 mm chemically strengthened aluminosilicate. Internal microscopic louvers narrow the viewing cone to 28 degrees off-axis while preserving 92% frontal optical clarity.
Screen protectors are verified by procurement manager Alina Koval in our Chicago facility. Price varies strictly between $40 and $60 depending on the target smartphone model, perimeter 2.5D chamfer tolerance, and packaging batch size.
Micro-louver dispersion and physical tolerances
Standard tinted foils blur text and bleed backlight across viewing angles. PrivacyGuard embeds precision microscopic vertical blinds directly inside the optical resin sandwich.
Frontal transmission versus lateral extinction
Direct-line viewing delivers 92% light transmission across the 400–700 nm visible spectrum. At 15 degrees lateral tilt, transmission drops to 54%. At 28 degrees lateral tilt, transmission reaches total blackout, preventing shoulder surfing in public transit, airports, and trading floors.
Unlike cheap polarization films that turn smartphone OLED screens into dark purple smears, the micro-louver array maintains true colour temperature calibration across standard sRGB and DCI-P3 colour spaces.
| Physical Metric | Specification Value | Testing Standard |
|---|---|---|
| Substrate Material | Aluminosilicate Glass | Chemical potassium-nitrate bath (420°C, 4 hrs) |
| Total Sheet Thickness | 0.33 mm (±0.02 mm) | Digital micrometer bench gauge |
| Privacy Viewing Cone | 28° total bilateral cutoff | Goniophotometer angular transmission sweep |
| Surface Scratch Hardness | 9H pencil / 6.5 Mohs | ASTM D3363 scratch hardness bench |
| Oleophobic Surface Treatment | AF plasma vacuum deposition | 115° initial water contact angle, >105° at 10k cycles |
| Perimeter Edge Contour | 2.5D CNC radius chamfer | Microscope edge profile inspection |
| Impact Resistance | 64 g steel ball drop from 1.2 m | Direct center impact without structural shattering |
Comparative fitment requirements
Screen shields are cut with a deliberate 0.45 mm offset inward from the physical phone chassis perimeter. This deliberate inset ensures full mechanical compatibility with heavy-duty bumper cases, preventing perimeter lip lifting when paired with our ArmorPro or UltraSlim case chassis.
Certified Chicago fulfillment and quotes
We supply protective hardware to corporate fleets, trading institutions, and device distributors across North America. Every delivery order is confirmed with physical batch documentation.
Submit device model specification
Provide your target phone model, quantity, and whether compatibility with specific perimeter case bezels is required.
Physical stock verification in Chicago
Alina Koval checks micrometer alignment frames, adhesive substrate freshness, and lot batch certificates in our Illinois facility.
Invoicing & same-day or 1–3 day dispatch
Commercial invoices issued in USD ($40–$60 per screen). Stock items dispatched same day; custom volume lots ship in 1 to 3 days.
Common objections and technical trade-offs
Will this screen protector darken the display?
Directly facing the screen, brightness attenuation is approximately 8%. You may choose to increase device screen backlight by one notch indoors. In bright direct outdoor sunlight, optical transmission remains sharp without rainbow refraction.
Does ultrasonic in-display fingerprint recognition work?
Yes. The optical resin adhesive layer measures 0.12 mm, allowing ultrasonic acoustic pulses to penetrate with recalibration after installation. Optical under-display sensors function without interference.
Who is this glass not suited for?
Collaborative multi-viewer use cases. If you regularly share your smartphone display with colleagues standing beside you, PrivacyGuard will completely black out their viewing perspective.
Request PrivacyGuard product specifications
Inquiry-only catalog desk. Submit your required phone models and batch sizes to receive commercial invoicing and exact micrometer tolerance sheets.