| Product name：What is Relay Lens |
| Product description： |
What is Relay Lenses ?
In optics, a relay lens is a lens or a group of lenses that receives the image from the objective lens and relays it to the eyepiece. Relay lenses are found in refracting telescopes, endoscopes, and periscopes to optically manipulate thelight path, extend the length of the whole optical system, and usually serve the purpose of inverting the image. They may be made of one or more conventional lenses or achromatic doublets, or a long cylindrical gradient-index of refraction lens (aGRIN lens).
WDR: Simulation distance(Distance from the metal surface above the relay lens to the Chart) WDV: Actual shooting distance(The actual shooting object distance of the lens to be tested)
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