Hoffman Engineering ANV-20/20 Infinity Focus System
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ANV-20/20 Infinity Focus System
The ANV-20/20 is a compact, portable system designed to provide the NVD user with an accurate means of performing infinity focus and mechanical alignment.
The system presents a resolution pattern at correct infinity focus to both NVD channels at once. This allows proper adjustment of all goggle parameters to be done quickly. The resolution pattern is directly correlated to the Snellen Eye Chart, providing a visual acuity range of 20/70 to 20/20.
The ANV-20/20 also incorporates an eight step gray scale for evaluating the dynamic range of an NVD. Each step doubles in density as you progress from 1 (clear) to 8 (opaque). This scale covers a range of 2 1/2 decades and checks the ability of the NVD to perform under a variety of light levels.
4632 West Aeronca St.
Boise, Idaho 83705
Tel: +1 (208) 426-8117
Fax: +1 (208) 426-8975
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