Mojo BluBlock Tints Details and Spectrograms
Our Mojo BluBlock Tints with Light Transmission Details and Spectrograms
We have recently made some improvements to our Mojo BluBlock Tints. First, let's define some terms:
Lens Tints (Lens Filters): Tinted lenses have been around for hundreds of years. The tints we are dealing with are tints/dyes that are applied to optical grade lenses. These lenses have traditionally been CR-39 resin lenses. We use MojoPoly lenses which are a type of tint-able polycarbonate that filters UV light to 400nm. The lenses are submerged into a heated tint bath and absorb the tint/dye. The type of tint combinations and the time submerged, determines how infused the lenses are. This creates a lens with a filter to absorb light in different wavelengths. Tints that are applied to our lenses filter out a percentage of light across areas of the spectrum.
Light Blocking Lenses: Lenses that have cut-offs have either very highly saturated tints or are manufactured with dyes that are infused in the lenses. These lenses will block any light below a certain point. Some people with various vision problems, like these intense tints and find them beneficial. Most people find them to be annoying to see through. These types of tints are considered "Therapy" tints.
UV/Blue Light/HEV Safety Range: Currently, the optical industry is using a standard of a 20% reduction of low blue light/HEV to the eye. Our goal is to create tinted lenses that provide wearers with the best protection from UV and blue light/HEV with the best look and feel to the tint. In terms of UV and blue light/HEV protection, our goal is to create lens tints that filter UV to ~400nm and blue light/HEV as high as possible (35% or higher).
The Wertheim Factor: Provides a numerical value defining the balance of UV/blue/HEV filtration, and the beneficial light allowed through the lens. We want the highest Wertheim Factor and the highest blue light filtration percentage.
Our Testing Methods: We tested many lenses with many combinations/formulae of tints. We narrowed down to the best, and then generated the spectrograms below using a BPI Spectrometer from Brain Power Inc, the leading manufacturer of lens tints, tint systems and spectrometers.
The BPI Spectrometer uses standards set forth by the American National Standards Institute (ANSI). These standards include defined parameters for areas of the EM spectrum. The ANSI limit for UV is to 380nm, the safety acceptance limit for lenses that filter UV light. (UV400 is even better.)
For blue light, the BPI Spectrometer averages a range over 390nm to 550nm, centered at 470nm. We use MojoPoly lenses in zero power to tint and test. All tested at ~400nm for UV-A and B. Tolerances are +/- 1%. The tint details below may change over time as we are always improving our products.
SPECTROGRAMS and LIGHT TRANSMITTANCE DETAILS:
|Mojo BluBlock Tints|