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2. Night-vision device - Wikipedia

   en.wikipedia.org/wiki/Night-vision_device

   The device enhances ambient visible light and converts near-infrared light into visible light which can then be seen by humans; this is known as I 2 (image intensification). By comparison, viewing of infrared thermal radiation is referred to as thermal imaging and operates in a different section of the infrared spectrum.

3. AN/PSQ-20 - Wikipedia

   en.wikipedia.org/wiki/AN/PSQ-20

   The AN/PSQ-20 Enhanced Night Vision Goggle (ENVG) is a third-generation passive monocular night vision device developed for the United States Armed Forces by ITT Exelis.It fuses image-intensifying and thermal-imaging technologies, enabling vision in conditions with very little light.

4. Telescopic sight - Wikipedia

   en.wikipedia.org/wiki/Telescopic_sight

   A totally different approach recently developed, which has been applied in the ELCAN DigitalHunter series and the ATN X-Sight series, essentially uses a video camera system to digitally capture, process and display a virtual reality image of the target into a small flat panel display built inside the eyepiece, often with additional built-in ...

5. Amateur astronomy - Wikipedia

   en.wikipedia.org/wiki/Amateur_astronomy

   Amateur astronomers watch the night sky during the Perseid meteor shower.. Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes.

6. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military ...

7. Large Binocular Telescope - Wikipedia

   en.wikipedia.org/wiki/Large_Binocular_Telescope

   LUCI (originally LUCIFER: Large Binocular Telescope Near-infrared Spectroscopic Utility with Camera and Integral Field Unit for Extragalactic Research) is the near-infrared instrument for the LBT. [20] [21] [22] The name of the instrument was changed to LUCI in 2012. LUCI operates in the 0.9–2.5 μm spectral range using a 2048 x 2048 element ...