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Contrast Enhancement Glass (ACE)
(Phillips 202) or (S-8817)

Schott Glass Technologies has developed a new contrast enhancement glass for spectacle lenses. The new material, called ACE, short for Amethyst Contrast Enhancer, utilizes rare earth oxides in the glass composition to achieve the unique color enhancing characteristics. Basically, the color enhancement concept works by selectively positioning transmission in the blue, green, and red spectral regions whereby one can improve the color discrimination between different color objects. These are the same colors used to produce a color television picture. They optimize the readability of such displays under high ambient light conditions. Phillips-202 Glass utilizes rare earth oxides in its composition to provide the same filtration. This glass is very efficient in filtering sodium flare in addition to providing ultraviolet protection to 390 mm. The Phillips202 (ACE) is becoming a preferable choice of hot glass workers. It is very comfortable for viewing under high ambient light conditions such as when working with hot glass or glowing heat sources for a duration of time. Also, although it has a relatively low luminous transmission of 38%, it is not recommended for sun protection use unless UV filtering coatings are applied.

Sodium Flare Poly (SFP) Filter

The Sodium Flare Polycarbonate lens is the sister lens to the Phillips202 Glass Lenses. The 202 is made of glass and absorbs different wavelengths at different points in the spectrum. The SFP lenses use organic dyes to block a more specific range of wavelengths. The two charts below show opposite curves, but you see the peak is the same around 575 to 600nm which is the wavelength of yellow light. The Sodium Flare Polycarbonate lens is a very effective filter for sodium flare absorption in addition to providing excellent ultraviolet (UV) protection up to 390 mm. The Sodium Flare lens is becoming a preferable choice of soft glass workers in the industry due to its excellent absorption, light weight and durability. Not only is it very comfortable for viewing under high ambient light conditions, but it also allows a high Visible Light Transmission permitting you to see in any lighting situation. This filter has a recommended use of lampworking on soft glass types, neon working, and any other industries like glass manufacturing that need Sodium Flare filtration with minimal IR protection. This lens has about 50% IR attenuation. If you need greater IR absorption, please use one of our Boroview or TrueView Shade 3 or 5 lenses.

Liability Disclaimer:

Phillips Safety Employees are not optometrists and can only make suggestions concerning eye protection. There are many types of eye protection available and we manufacture as many as possible. Phillips Safety Products does not accept any liability concerning eye damage arising from the use, misuse, or non-use of any eyewear products we sell.