f28mm Night Vision Objectlve NV2828
Night-vision devices convert invisible target light signals (low light or IR) to electricity, amplify them and convert them back to visible light. An objective focuses available light onto an intensifier; its photocathode converts photons to electrons, which accelerate through an electrostatic region and strike a phosphor screen to form a visible image. Objectives of different magnifications are available, but greater magnification loses more light, so 1× is common; typical choices are 1X, 3X and 5X. Aperture and magnification matter; without size constraints, larger is described as better. With the same intensifier tube, a larger aperture generally gives longer reach and clearer images. Higher lens resolution improves clarity. Stated typical viewing distances are 100–250m for Gen1, 200–350m for Gen2 and 300–500m for Gen3, depending on lens quality/size, processing, IR illuminator and resolution.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Description | f=28mm F=2.8 |
| Magnification | eyepiece |
| Mount | M46X1 |
| Resolution | 40 lp/mm |
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Datasheet
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