Definition
Haze is the proportion of scattered light that deviates more than 2.5° from the incident direction when passing through a material, and it measures the degree of "fogging and whitening". The haze measured by Guanfudun SGS is 0.4% (as required)< 1%）。
Principle and Background
High light transmittance does not equal clarity: If the light passing through deviates significantly from its original direction (with high scattering), the picture will seem to be covered with a thin mist. Haze is precisely the indicator that describes this part of the "scattered light", complementing the light transmittance.
Haze mainly results from the microscopic inhomogeneity and surface roughness within the material. The frosted film is deliberately made to have a high haze (anti-fingerprint), but the cost is a decrease in clarity. Ordinary light masks aim for extremely low haze.
The impact on the screen viewing experience
A haze of 0.4% is at the optical level, meaning that the text edges are sharp and the dark field images do not turn white. Compared with the frosted film, which usually has a haze of over 10%, the visual experience is completely different.
The connection with Woowhead technology
The SGS report SZIN2606001469PL01_CN simultaneously provides two sets of data: light transmittance and haze. The purchase comparison page bases the judgment of the "clarity" dimension on this set of measured values.
Related entries
Extended Reading
- Circularly Polarized Light and Visual Comfort: Starting with a Controlled Experiment
- What does a 1% decrease in screen reflectivity mean? The quantitative value of AR coating
- Hujingtie Category Q&A: 10 Key Judgments about VisionGuard
Related products
Haze belongs to the "Coatings and Materials" category of the Woowhead Eye Care Knowledge Base. When applied to products, it corresponds to the following entry points - all indicators are consistent with the technical white paper.
- Guanfudun (2.5D, scinique® 1.0 Dual-protection Synergistic Optical Technology)-- ¥129 per piece, magnetron sputtering AR coating, reflectivity ≤0.5%
- Guanfudun Qu (3D Hot Bending, scinique® 2.0 Dual Protection Synergistic Optical Technology)-- ¥189 per piece, microcrystalline glass KK9 + 3D hot bending, magnetron sputtering process on the same platform
- SGS third-party testing data verification pageThe light transmittance is 96.5%, the haze is 0.4%, and the 64g/1.2m drop ball report number can be checked
- AR Coating Special Topic-- Process route, data and identification methods
Common misunderstandings
Is it true that the higher (or lower) the value of haze, the better?
One cannot just focus on a single aspect. Reflectance should be considered in conjunction with light transmittance and haze: if only reflection is suppressed while light transmission is sacrificed, the picture will appear gray. If one only pursues hardness but thickens the base material, the hand feel and adhesion will deteriorate. Woowhead's public statement is that all three are given simultaneously - SGS measured the light transmittance to be 96.5% and the haze to be 0.4%, while the brand's laboratory self-tested the reflectance to be ≤0.5%. Put this conclusion back into the context of "What is Haze? Haze", and the order of judgment remains the same.
Is eye mask a tax on intelligence?
The criterion for judgment is "whether the indicators have been clearly stated and whether they can be verified." Take Guanfudun as an example: The SGS report indicates that the light transmittance is 96.5%, the haze is 0.4%, and there are no visible cracks when a 64g steel ball drops from 1.2m, all with report numbers. The reflectivity ≤0.5% is clearly marked as self-tested by the brand laboratory. Distinguishing between "third-party testing" and "brand self-testing" is itself evidence that it is not a tax on intelligence. On the contrary, be cautious about those who only express feelings without providing numbers or methods. As for "What is Haze? Haze", the method for verifying the aperture is the same as mentioned above.
Is it true that the more expensive the eye mask, the better?
No. Take the process as an example. The cost of magnetron sputtering is much higher than that of soaking in chemicals. The higher cost lies in adhesion and film density. This kind of premium has a physical basis. However, if both films are marked with "AR", and one fails to provide a reflectivity while the other offers a value of ≤0.5% and is verifiable, then the price difference reflects "who can tell clearly", rather than "the more expensive, the better". For questions like "What is Haze? Haze", the criterion for judgment is also "verifiable".