The AGW®-325 lens was developed to answer requests for exceptional infrared radiation protection while also reducing the light level perceived by the eye. This filter updates the traditional AGW-286 filter.
It consists of a base lens of exclusive Blue Didymium™, a thin section of our exclusive lightly tinted IR filter glass, and a section of either shade 3, 4, 5, 6, or 8 Green Welding cemented to the base lens. You may have your lenses made 50/50 or one-third/two-thirds. The shades in standard configuration are "clear" on top and dark on the bottom. The reversed configuration (custom-made, not returnable) is dark on top and "clear" on the bottom. Your choice.
The available shades are:
- 3 *Custom made, not returnable*
- 4
- 5
- 6
- 8 *Custom made, not returnable*
Suggested uses are: where there is a need for attenuation of bright illumination, such as that generated when working Pyrex®, quartz, Vicor®, platinum jewelry work, and any operation where long periods of time are spent gazing into a high-temperature furnace or fire pit.
The AGW-325 filter is available only in non-prescription, and single vision prescription forms. Because of the laminations involved, we cannot make this filter in bifocals, trifocals, or progressive forms.
Thickness Advisory: This filter is thicker than normal lenses. In non-prescription form, it is approximately 5 mm thick. Single vision prescription adds at least 1 mm.
Shade 8 is not made in prescription form due to the extreme darkness of the filter.
Protected under the United States Patent Number 6,612,697.
Specifications (Shade 4):
Maximum Visible Light Transmission: 11.2 %
Average (400 to 750 nm) Visible Light Transmission: 4.9 %
Average (751 to 3000 nm) IR Transmission: 4.0 %
ANSI Welding Shade Equivalent: 3.5 approximate
Specifications (Shade 5):
Maximum Visible Light Transmission: 5.7 %
Average (400 to 750 nm) Visible Light Transmission: 2.1 %
Average (751 to 3000 nm) IR Transmission: 1.5 %
ANSI Welding Shade Equivalent: 4.5 approximate
